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12636044
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12898858
[ "Genes", "of", "the", "renin-angiotensin", "system", "(RAS)", "are", "involved", "in", "the", "progression", "of", "renal", "failure.", "Among", "them,", "the", "angiotensin-converting", "enzyme", "(ACE),", "angiotensinogen", "(AGT)", "and", "angiotensin", "II", "type", "1", "receptor", "(AT1R)", "genes", "are", "of", "particular", "interest.", "We", "examined", "polymorphisms", "of", "these", "three", "genes", "for", "association", "with", "the", "development", "of", "interstitial", "nephritis", "and", "progression", "to", "end-stage", "renal", "failure.", "The", "allele", "frequency", "and", "genotype", "distribution", "were", "compared", "in", "90", "patients", "with", "interstitial", "nephritis", "and", "200", "healthy", "controls.", "DNA", "samples", "were", "genotyped", "by", "polymerase", "chain", "reaction", "(PCR).", "We", "did", "not", "find", "statistically", "significant", "differences", "between", "groups", "in", "the", "insertion/deletion", "polymorphism", "of", "the", "ACE", "gene.", "An", "involvement", "of", "M235T", " ", "polymorphism", "of", "the", "AGT", "gene", "in", "renal", "disease", "was", "observed", "in", "our", "study.", "The", "frequency", "of", "the", "T", "allele", "was", "higher", "in", "patients", "than", "in", "controls", "(32%", "vs.", "24%).", "In", "the", "A1166C", " ", "AT1R", "polymorphism", "the", "homozygous", "CC", "genotype", "was", "also", "more", "frequent", "in", "interstitial", "nephritis", "patients", "(7%", "vs.", "3.5%).", "In", "patients", "carrying", "the", "C", "allele,", "an", "average", "time", "to", "ESRD", "was", "significantly", "shorter", "than", "in", "subjects", "with", "the", "AA", "genotype.", "Our", "study", "shows", "the", "association", "of", "the", "AGT", "and", "AT1R", "gene", "polymorphisms", "with", "the", "development", "and", "progression", "of", "interstitial", "nephritis.", "The", "C", "allele", "of", "the", "A1166C", " ", "polymorphism", "appears", "to", "be", "a", "risk", "factor", "for", "faster", "disease", "progression." ]
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Genes of the renin-angiotensin system (RAS) are involved in the progression of renal failure. Among them, the angiotensin-converting enzyme (ACE), angiotensinogen (AGT) and angiotensin II type 1 receptor (AT1R) genes are of particular interest. We examined polymorphisms of these three genes for association with the development of interstitial nephritis and progression to end-stage renal failure. The allele frequency and genotype distribution were compared in 90 patients with interstitial nephritis and 200 healthy controls. DNA samples were genotyped by polymerase chain reaction (PCR). We did not find statistically significant differences between groups in the insertion/deletion polymorphism of the ACE gene. An involvement of M235T polymorphism of the AGT gene in renal disease was observed in our study. The frequency of the T allele was higher in patients than in controls (32% vs. 24%). In the A1166C AT1R polymorphism the homozygous CC genotype was also more frequent in interstitial nephritis patients (7% vs. 3.5%). In patients carrying the C allele, an average time to ESRD was significantly shorter than in subjects with the AA genotype. Our study shows the association of the AGT and AT1R gene polymorphisms with the development and progression of interstitial nephritis. The C allele of the A1166C polymorphism appears to be a risk factor for faster disease progression.
22337303
[ "Carboxy-terminal", "sequence", "variation", "of", "LMP1", "gene", "in", "Epstein-Barr-virus-associated", "mononucleosis", "and", "tumors", "from", "Serbian", "patients." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Carboxy-terminal sequence variation of LMP1 gene in Epstein-Barr-virus-associated mononucleosis and tumors from Serbian patients.
17683901
[]
[]
19880293
[ "BACKGROUND:", "Psoriasis", "is", "a", "common", "dermatological", "disorder,", "in", "which", "autoimmunity", "plays", "an", "important", "role.", "CD4(+)CD25(+)", "regulatory", "T", "cells", "(T-regs)", "have", "been", "suggested", "to", "be", "involved", "in", "the", "pathogenesis", "of", "some", "autoimmune", "diseases.", "T-regs", "express", "the", "fork", "head/winged", "helix", "transcription", "factor,", "FOXP3,", "which", "appears", "to", "be", "of", "key", "importance", "in", "the", "development", "and", "function", "of", "T-regs.", "Studies", "have", "found", "that", "single-nucleotide", "polymorphisms", "(SNPs)", "in", "the", "FOXP3", "gene", "contribute", "to", "susceptibility", "to", "some", "autoimmune", "disorders.", "However,", "information", "about", "FOXP3", "gene", "in", "psoriasis", "is", "limited.", "OBJECTIVE:", "This", "study", "evaluated", "the", "association", "between", "FOXP3", "gene", "SNPs", "and", "susceptibility", "to", "psoriasis", "in", "a", "Han", "Chinese", "population.", "METHODS:", "In", "a", "hospital-based", "case-control", "study,", "524", "patients", "with", "psoriasis", "and", "549", "psoriasis-free", "controls", "were", "recruited", "according", "to", "age", "and", "gender.", "We", "investigated", "four", "SNPs", "in", "the", "FOXP3", "gene", "(", "-6054,", "deletion/ATT", ";", "-3279,", "A/C", ";", "-924,", "A/G", ";", "IVS9+459,", "A/G", ")", "in", "psoriatic", "patients,", "and", "assessed", "allele", "and", "genotype", "frequencies", "in", "psoriatic", "patients", "(237", "females,", "287", "males)", "and", "normal", "controls", "(272", "females,", "277", "males).", "The", "polymorphisms", "were", "genotyped", "using", "the", "PCR", "sequence-specific", "primer", "(PCR-SSP)", "technique", "and", "PCR-restriction", "fragment", "length", "polymorphism", "(RFLP)", "analysis.", "RESULTS:", "We", "found", "that", "increased", "risk", "of", "psoriasis", "was", "associated", "with", "the", "FOXP3", "-3279", "AC", "genotype", "(adjusted", "OR,", "1.32;", "95%", "CI,", "1.01-1.74)", "and", "the", "combined", "AC+AA", "genotype", "(adjusted", "OR,", "1.38;", "95%", "CI,", "1.07-1.78),", "compared", "with", "the", "-3279", "CC", "genotype.", "We", "also", "found", "that", "an", "increased", "risk", "of", "psoriasis", "was", "associated", "with", "the", "FOXP3", "IVS9+459", "GG", "genotype", "(adjusted", "OR,", "2.24;", "95%", "CI,", "1.41-3.58).", "However,", "the", "combined", "GA+GG", "genotype", "showed", "no", "such", "tendency", "(adjusted", "OR=1.28;", "95%", "CI,", "1.00-1.64),", "compared", "with", "the", "IVS9+459", "AA", "genotype.", "There", "was", "no", "evidence", "of", "an", "increased", "risk", "associated", "with", "the", "FOXP3", "-6054", "deletion/ATT", " ", "or", "FOXP3", "-924", "A/G", " ", "genotype.", "In", "combined", "genotype", "analyses,", "the", "FOXP3-3279", "AC+AA", "genotype", "was", "more", "obviously", "associated", "in", "males", "(adjusted", "OR=1.60,", "95%", "CI=1.11-2.31)", "and", "severe", "psoriasis", "patients", "(PASI", "score", ">20;", "adjusted", "OR=1.97,", "95%", "CI=1.41-2.75).", "Meanwhile,", "the", "FOXP3", "IVS9+459", "GA+GG", "genotype", "was", "also", "associated", "with", "severe", "psoriasis", "patients", "(adjusted", "OR=1.69,", "95%", "CI=1.21-2.36).", "CONCLUSIONS:", "FOXP3", "polymorphisms", "appear", "to", "contribute", "to", "the", "risk", "of", "psoriasis", "in", "a", "Han", "Chinese", "population.", "Larger", "studies", "are", "needed", "to", "confirm", "these", "findings." ]
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BACKGROUND: Psoriasis is a common dermatological disorder, in which autoimmunity plays an important role. CD4(+)CD25(+) regulatory T cells (T-regs) have been suggested to be involved in the pathogenesis of some autoimmune diseases. T-regs express the fork head/winged helix transcription factor, FOXP3, which appears to be of key importance in the development and function of T-regs. Studies have found that single-nucleotide polymorphisms (SNPs) in the FOXP3 gene contribute to susceptibility to some autoimmune disorders. However, information about FOXP3 gene in psoriasis is limited. OBJECTIVE: This study evaluated the association between FOXP3 gene SNPs and susceptibility to psoriasis in a Han Chinese population. METHODS: In a hospital-based case-control study, 524 patients with psoriasis and 549 psoriasis-free controls were recruited according to age and gender. We investigated four SNPs in the FOXP3 gene ( -6054, deletion/ATT ; -3279, A/C ; -924, A/G ; IVS9+459, A/G ) in psoriatic patients, and assessed allele and genotype frequencies in psoriatic patients (237 females, 287 males) and normal controls (272 females, 277 males). The polymorphisms were genotyped using the PCR sequence-specific primer (PCR-SSP) technique and PCR-restriction fragment length polymorphism (RFLP) analysis. RESULTS: We found that increased risk of psoriasis was associated with the FOXP3 -3279 AC genotype (adjusted OR, 1.32; 95% CI, 1.01-1.74) and the combined AC+AA genotype (adjusted OR, 1.38; 95% CI, 1.07-1.78), compared with the -3279 CC genotype. We also found that an increased risk of psoriasis was associated with the FOXP3 IVS9+459 GG genotype (adjusted OR, 2.24; 95% CI, 1.41-3.58). However, the combined GA+GG genotype showed no such tendency (adjusted OR=1.28; 95% CI, 1.00-1.64), compared with the IVS9+459 AA genotype. There was no evidence of an increased risk associated with the FOXP3 -6054 deletion/ATT or FOXP3 -924 A/G genotype. In combined genotype analyses, the FOXP3-3279 AC+AA genotype was more obviously associated in males (adjusted OR=1.60, 95% CI=1.11-2.31) and severe psoriasis patients (PASI score >20; adjusted OR=1.97, 95% CI=1.41-2.75). Meanwhile, the FOXP3 IVS9+459 GA+GG genotype was also associated with severe psoriasis patients (adjusted OR=1.69, 95% CI=1.21-2.36). CONCLUSIONS: FOXP3 polymorphisms appear to contribute to the risk of psoriasis in a Han Chinese population. Larger studies are needed to confirm these findings.
14510914
[]
[]
21937424
[ "The", "TREX1", "exonuclease", "R114H", " ", "mutation", "in", "Aicardi-Gouti", " ", "res", "syndrome", "and", "lupus", "reveals", "dimeric", "structure", "requirements", "for", "DNA", "degradation", "activity." ]
[ 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
The TREX1 exonuclease R114H mutation in Aicardi-Gouti res syndrome and lupus reveals dimeric structure requirements for DNA degradation activity.
20227423
[ "AIMS:", "Disrupted-in", "schizophrenia", "1", "(DISC1),", "identified", "in", "a", "pedigree", "with", "a", "familial", "psychosis", "with", "the", "chromosome", "translocation", "(1:11),", "is", "a", "putative", "susceptibility", "gene", "for", "psychoses", "such", "as", "schizophrenia", "and", "major", "depressive", "disorder", "(MDD).", "Patients", "with", "chronic", "fatigue", "syndrome", "(CFS)", "report", "having", "continuous", "severe", "fatigue", "and", "many", "overlapping", "symptoms", "with", "MDD;", "however,", "the", "mechanism", "and", "effective", "treatment", "of", "CFS", "are", "still", "unclear.", "We", "focused", "on", "the", "overlapping", "symptoms", "between", "CFS", "and", "MDD", "and", "performed", "an", "association", "study", "of", "the", "functional", "single-nucleotide", "polymorphism", "(SNP)", "in", "the", "DISC1", "gene", "with", "CFS.", "MAIN", "METHODS:", "Venous", "blood", "was", "drawn", "from", "CFS", "patients", "and", "controls", "and", "genomic", "DNA", "was", "extracted", "from", "the", "whole", "blood", "according", "to", "standard", "procedures.", "Ser704Cys", " ", "DISC1", "SNP", "was", "genotyped", "using", "the", "TaqMan", "5'-exonuclease", "allelic", "discrimination", "assay.", "KEY", "FINDINGS:", "We", "found", "that", "the", "Cys704", "allele", "of", "Ser704Cys", " ", "SNP", "was", "associated", "with", "an", "increased", "risk", "of", "CFS", "development", "compared", "with", "the", "Ser704", "allele.", "SIGNIFICANCE:", "DISC1", "Ser704Cys", " ", "might", "be", "a", "functional", "variant", "that", "affects", "one", "of", "the", "mechanisms", "implicated", "in", "the", "biology", "of", "CFS.", "Some", "patients", "with", "CFS", "showed", "a", "phenotype", "similar", "to", "that", "of", "patients", "with", "MDD,", "but", "further", "studies", "are", "needed", "to", "clarify", "the", "biological", "mechanism,", "because", "this", "study", "is", "of", "a", "rather", "preliminary", "nature.", "Despite", "the", "variety", "of", "patients", "with", "CFS,", "DISC1", "Ser704Cys", " ", "has", "an", "association", "with", "CFS,", "which", "may", "also", "suggest", "that", "DISC1", "plays", "a", "central", "role", "in", "the", "induction", "of", "various", "psychiatric", "diseases." ]
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AIMS: Disrupted-in schizophrenia 1 (DISC1), identified in a pedigree with a familial psychosis with the chromosome translocation (1:11), is a putative susceptibility gene for psychoses such as schizophrenia and major depressive disorder (MDD). Patients with chronic fatigue syndrome (CFS) report having continuous severe fatigue and many overlapping symptoms with MDD; however, the mechanism and effective treatment of CFS are still unclear. We focused on the overlapping symptoms between CFS and MDD and performed an association study of the functional single-nucleotide polymorphism (SNP) in the DISC1 gene with CFS. MAIN METHODS: Venous blood was drawn from CFS patients and controls and genomic DNA was extracted from the whole blood according to standard procedures. Ser704Cys DISC1 SNP was genotyped using the TaqMan 5'-exonuclease allelic discrimination assay. KEY FINDINGS: We found that the Cys704 allele of Ser704Cys SNP was associated with an increased risk of CFS development compared with the Ser704 allele. SIGNIFICANCE: DISC1 Ser704Cys might be a functional variant that affects one of the mechanisms implicated in the biology of CFS. Some patients with CFS showed a phenotype similar to that of patients with MDD, but further studies are needed to clarify the biological mechanism, because this study is of a rather preliminary nature. Despite the variety of patients with CFS, DISC1 Ser704Cys has an association with CFS, which may also suggest that DISC1 plays a central role in the induction of various psychiatric diseases.
16288197
[ "PURPOSE:", "Congenital", "microcoria", "is", "a", "rare", "autosomal", "dominant", "developmental", "disorder", "of", "the", "iris", "associated", "with", "myopia", "and", "juvenile", "open", "angle", "glaucoma.", "Linkage", "to", "the", "chromosomal", "locus", "13q31-q32", "has", "previously", "been", "reported", "in", "a", "large", "French", "family.", "In", "the", "current", "study,", "a", "three", "generation", "Asian", "Indian", "family", "with", "15", "congenital", "microcoria", "(pupils", "with", "a", "diameter", "<2", "mm)", "affected", "members", "was", "studied", "for", "linkage", "to", "candidate", "microsatellite", "markers", "at", "the", "13q31-q32", "locus.", "METHODS:", "Twenty-four", "members", "of", "the", "family", "were", "clinically", "examined", "and", "genomic", "DNA", "was", "extracted.", "Microsatellite", "markers", "at", "13q31-q32", "were", "PCR", "amplified", "and", "run", "on", "an", "ABI", "Prism", "310", "genetic", "analyzer", "and", "genotyped", "with", "the", "GeneScan", "analysis.", "Two", "point", "and", "multipoint", "linkage", "analyses", "were", "performed", "using", "the", "MLINK", "and", "SUPERLINK", "programs.", "RESULTS:", "Peak", "two", "point", "LOD", "scores", "of", "3.5,", "4.7,", "and", "5.3", "were", "found", "co-incident", "with", "consecutive", "markers", "D13S154,", "DCT,", "and", "D13S1280.", "Multipoint", "analysis", "revealed", "a", "4", "cM", "region", "encompassing", "D13S1300", "to", "D13S1280", "where", "the", "LOD", "remains", "just", "over", "6.0", "Thus", "we", "confirm", "localization", "of", "the", "congenital", "microcoria", "locus", "to", "chromosomal", "locus", "13q31-q32.", "In", "addition,", "eight", "individuals", "who", "had", "both", "microcoria", "and", "glaucoma", "were", "screened", "for", "glaucoma", "genes:", "myocilin", "(MYOC),", "optineurin", "(OPTN)", "and", "CYP1B1.", "Using", "direct", "sequencing", "a", "point", "mutation", "(", "144", "G>A", ")", "resulting", "in", "a", "Q48H", " ", "substitution", "in", "exon", "1", "of", "the", "MYOC", "gene", "was", "observed", "in", "five", "of", "the", "eight", "glaucoma", "patients,", "but", "not", "in", "unaffected", "family", "members", "and", "100", "unrelated", "controls.", "CONCLUSIONS:", "We", "have", "confirmed", "the", "localization", "of", "the", "congenital", "microcoria", "locus", "(MCOR)", "to", "13q31-q32", "in", "a", "large", "Asian", "Indian", "family", "and", "conclude", "that", "current", "information", "suggests", "this", "is", "a", "single", "locus", "disorder", "and", "genetically", "homogeneous.", "When", "combined", "with", "the", "initial", "linkage", "paper", "our", "haplotype", "and", "linkage", "data", "map", "the", "MCOR", "locus", "to", "a", "6-7", "cM", "region", "between", "D13S265", "and", "D13S1280.", "The", "DCT", "locus,", "a", "member", "of", "the", "tyrosinase", "family", "involved", "in", "pigmentation,", "maps", "within", "this", "region.", "Data", "presented", "here", "supports", "the", "hypothesis", "that", "congenital", "microcoria", "is", "a", "potential", "risk", "factor", "for", "glaucoma,", "although", "this", "observation", "is", "complicated", "by", "the", "partial", "segregation", "of", "MYOC", "Q48H", " ", "(1q24.3-q25.2),", "a", "mutation", "known", "to", "be", "associated", "with", "glaucoma", "in", "India.", "Fine", "mapping", "and", "candidate", "gene", "analysis", "continues", "with", "the", "hope", "that", "characterizing", "the", "micocoria", "gene", "will", "lead", "to", "a", "better", "understanding", "of", "microcoria", "and", "glaucoma", "causation.", "The", "relationship", "between", "microcoria,", "glaucoma,", "and", "the", "MYOC", "Q48H", " ", "mutation", "in", "this", "family", "is", "discussed." ]
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PURPOSE: Congenital microcoria is a rare autosomal dominant developmental disorder of the iris associated with myopia and juvenile open angle glaucoma. Linkage to the chromosomal locus 13q31-q32 has previously been reported in a large French family. In the current study, a three generation Asian Indian family with 15 congenital microcoria (pupils with a diameter <2 mm) affected members was studied for linkage to candidate microsatellite markers at the 13q31-q32 locus. METHODS: Twenty-four members of the family were clinically examined and genomic DNA was extracted. Microsatellite markers at 13q31-q32 were PCR amplified and run on an ABI Prism 310 genetic analyzer and genotyped with the GeneScan analysis. Two point and multipoint linkage analyses were performed using the MLINK and SUPERLINK programs. RESULTS: Peak two point LOD scores of 3.5, 4.7, and 5.3 were found co-incident with consecutive markers D13S154, DCT, and D13S1280. Multipoint analysis revealed a 4 cM region encompassing D13S1300 to D13S1280 where the LOD remains just over 6.0 Thus we confirm localization of the congenital microcoria locus to chromosomal locus 13q31-q32. In addition, eight individuals who had both microcoria and glaucoma were screened for glaucoma genes: myocilin (MYOC), optineurin (OPTN) and CYP1B1. Using direct sequencing a point mutation ( 144 G>A ) resulting in a Q48H substitution in exon 1 of the MYOC gene was observed in five of the eight glaucoma patients, but not in unaffected family members and 100 unrelated controls. CONCLUSIONS: We have confirmed the localization of the congenital microcoria locus (MCOR) to 13q31-q32 in a large Asian Indian family and conclude that current information suggests this is a single locus disorder and genetically homogeneous. When combined with the initial linkage paper our haplotype and linkage data map the MCOR locus to a 6-7 cM region between D13S265 and D13S1280. The DCT locus, a member of the tyrosinase family involved in pigmentation, maps within this region. Data presented here supports the hypothesis that congenital microcoria is a potential risk factor for glaucoma, although this observation is complicated by the partial segregation of MYOC Q48H (1q24.3-q25.2), a mutation known to be associated with glaucoma in India. Fine mapping and candidate gene analysis continues with the hope that characterizing the micocoria gene will lead to a better understanding of microcoria and glaucoma causation. The relationship between microcoria, glaucoma, and the MYOC Q48H mutation in this family is discussed.
18257781
[ "BACKGROUND:", "Autosomal", "dominant", "polycystic", "kidney", "disease", "(ADPKD),", "which", "is", "caused", "by", "mutations", "in", "polycystins", "1", "(PC1)", "and", "2", "(PC2),", "is", "one", "of", "the", "most", "commonly", "inherited", "renal", "diseases,", "affecting", "~1", ":", "1000", "Caucasians.", "MATERIALS", "AND", "METHODS:", "We", "screened", "Greek", "ADPKD", "patients", "with", "the", "denaturing", "gradient", "gel", "electrophoresis", "(DGGE)", "assay", "and", "direct", "sequencing.", "RESULTS:", "We", "identified", "a", "patient", "homozygous", "for", "a", "nucleotide", "change", "c.1445T", ">", "G", ",", "resulting", "in", "a", "novel", "homozygous", "substitution", "of", "the", "non-polar", "hydrophobic", "phenylalanine", "to", "the", "polar", "hydrophilic", "cysteine", "in", "exon", "6", "at", "codon", "482", "(", "p.F482C", ")", "of", "the", "PKD2", "gene", "and", "a", "de-novo", "PKD1", "splice-site", "variant", "IVS21-2delAG", ".", "We", "did", "not", "find", "this", "PKD2", "variant", "in", "a", "screen", "of", "280", "chromosomes", "of", "healthy", "subjects,", "supporting", "its", "pathogenicity.", "The", "proband's", "parents", "did", "not", "have", "the", "PKD1", "mutation.", "Real-time", "PCR", "of", "the", "PKD2", "transcript", "from", "a", "skin", "biopsy", "revealed", "20-fold", "higher", "expression", "in", "the", "patient", "than", "in", "a", "healthy", "subject", "and", "was", "higher", "in", "the", "patient's", "peripheral", "blood", "mononuclear", "cells", "(PBMCs)", "than", "in", "those", "of", "her", "heterozygote", "daughter", "and", "a", "healthy", "subject.", "The", "greater", "gene", "expression", "was", "also", "supported", "by", "Western", "blotting.", "Inner", "medullar", "collecting", "duct", "(IMCD)", "cells", "transfected", "with", "the", "mutant", "PKD2", "mouse", "gene", "presented", "a", "perinuclear", "and", "diffuse", "cytoplasmic", "localization", "compared", "with", "the", "wild", "type", "ER", "localization.", "Patch-clamping", "of", "PBMCs", "from", "the", "p.F482C", " ", "homozygous", "and", "heterozygous", "subjects", "revealed", "lower", "polycystin-2", "channel", "function", "than", "in", "controls.", "CONCLUSIONS:", "We", "report", "for", "the", "first", "time", "a", "patient", "with", "ADPKD", "who", "is", "heterozygous", "for", "a", "de", "novo", "PKD1", "variant", "and", "homozygous", "for", "a", "novel", "PKD2", "mutation." ]
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BACKGROUND: Autosomal dominant polycystic kidney disease (ADPKD), which is caused by mutations in polycystins 1 (PC1) and 2 (PC2), is one of the most commonly inherited renal diseases, affecting ~1 : 1000 Caucasians. MATERIALS AND METHODS: We screened Greek ADPKD patients with the denaturing gradient gel electrophoresis (DGGE) assay and direct sequencing. RESULTS: We identified a patient homozygous for a nucleotide change c.1445T > G , resulting in a novel homozygous substitution of the non-polar hydrophobic phenylalanine to the polar hydrophilic cysteine in exon 6 at codon 482 ( p.F482C ) of the PKD2 gene and a de-novo PKD1 splice-site variant IVS21-2delAG . We did not find this PKD2 variant in a screen of 280 chromosomes of healthy subjects, supporting its pathogenicity. The proband's parents did not have the PKD1 mutation. Real-time PCR of the PKD2 transcript from a skin biopsy revealed 20-fold higher expression in the patient than in a healthy subject and was higher in the patient's peripheral blood mononuclear cells (PBMCs) than in those of her heterozygote daughter and a healthy subject. The greater gene expression was also supported by Western blotting. Inner medullar collecting duct (IMCD) cells transfected with the mutant PKD2 mouse gene presented a perinuclear and diffuse cytoplasmic localization compared with the wild type ER localization. Patch-clamping of PBMCs from the p.F482C homozygous and heterozygous subjects revealed lower polycystin-2 channel function than in controls. CONCLUSIONS: We report for the first time a patient with ADPKD who is heterozygous for a de novo PKD1 variant and homozygous for a novel PKD2 mutation.
12701064
[ "A", "novel", "compound", "heterozygous", "mutation", "in", "the", "CYP17", "(P450", "17alpha-hydroxylase)", "gene", "leading", "to", "17alpha-hydroxylase/17,20-lyase", "deficiency." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
A novel compound heterozygous mutation in the CYP17 (P450 17alpha-hydroxylase) gene leading to 17alpha-hydroxylase/17,20-lyase deficiency.
18164595
[]
[]
20651814
[ "OBJECTIVE:", "The", "present", "study", "aimed", "to", "estimate", "the", "association", "between", "susceptibility", "to", "migraine", "and", "the", "12-nucleotide", "insertion/deletion", "(indel)", "polymorphism", "in", "promoter", "region", "of", "alpha(2B)-adrenergic", "receptor", "gene", "(ADRA2B).", "METHODS:", "A", "case-control", "study", "was", "carried", "out", "in", "Chinese", "Han", "population,", "including", "368", "cases", "of", "migraine", "and", "517", "controls.", "Genomic", "DNA", "was", "extracted", "from", "blood", "samples,", "and", "DNA", "fragments", "containing", "the", "site", "of", "polymorphism", "were", "amplified", "by", "PCR.", "Data", "were", "adjusted", "for", "sex,", "age,", "migraine", "history", "and", "family", "history,", "and", "analyzed", "using", "a", "logistic", "regression", "model.", "RESULTS:", "There", "was", "no", "association", "between", "indel", "polymorphism", "and", "migraine,", "at", "either", "the", "allele", "or", "the", "genotype", "level.", "CONCLUSION:", "These", "findings", "do", "not", "support", "a", "functional", "significance", "of", "ADRA2B", "indel", "polymorphism", "at", "position", "-4825", "relative", "to", "the", "start", "codon", "in", "the", "far", "upstream", "region", "of", "the", "promoter", "in", "the", "present", "migraine", "subjects." ]
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OBJECTIVE: The present study aimed to estimate the association between susceptibility to migraine and the 12-nucleotide insertion/deletion (indel) polymorphism in promoter region of alpha(2B)-adrenergic receptor gene (ADRA2B). METHODS: A case-control study was carried out in Chinese Han population, including 368 cases of migraine and 517 controls. Genomic DNA was extracted from blood samples, and DNA fragments containing the site of polymorphism were amplified by PCR. Data were adjusted for sex, age, migraine history and family history, and analyzed using a logistic regression model. RESULTS: There was no association between indel polymorphism and migraine, at either the allele or the genotype level. CONCLUSION: These findings do not support a functional significance of ADRA2B indel polymorphism at position -4825 relative to the start codon in the far upstream region of the promoter in the present migraine subjects.
14533983
[ "Entry", "of", "human", "immunodeficiency", "type", "1", "virus", "(HIV-1)", "into", "target", "cells", "requires", "both", "CD(4)and", "one", "of", "the", "chemokine", "receptors.", "Viruses", "predominantly", "use", "one,", "or", "occasionally", "both,", "of", "the", "major", "co-receptors", "CCR5", "and", "CXCR4,", "although", "other", "receptors,", "including", "CCR2B", "and", "CCR3,", "function", "as", "minor", "co-receptors.", "A", "32-nucleotide", "deletion", "(D32)", "within", "the", "b-chemokine", "receptor", "5", "gene", "(CCR5)", "has", "been", "described", "in", "subjects", "who", "remain", "uninfected", "despite", "extensive", "exposition", "to", "HIV-1.", "The", "heterozygous", "genotype", "delays", "disease", "progression.", "This", "allele", "is", "common", "among", "Caucasians,", "but", "has", "not", "been", "found", "in", "people", "of", "African", "or", "Asian", "ancestry.", "A", "more", "common", "transition", "involving", "a", "valine", "to", "isoleucine", "switch", "in", "transmembrane", "domain", "I", "of", "CCR2B", "(64I),", "with", "unknown", "functional", "consequences,", "was", "found", "to", "delay", "disease", "progression", "but", "not", "to", "reduce", "infection", "risk.", "As", "the", "Brazilian", "population", "consists", "of", "a", "mixture", "of", "several", "ethnic", "groups,", "we", "decided", "to", "examine", "the", "genotype", "frequency", "of", "these", "polymorphisms", "in", "this", "country.", "There", "were", "11.5%", "CCR5", "heterozygotes", "among", "the", "HIV-1", "infected", "population", "and", "12.5%", "among", "uninfected", "individuals,", "similar", "to", "data", "from", "North", "America", "and", "Western", "Europe.", "The", "prevalence", "of", "CCR2-64I", "homozygotes", "and", "heterozygotes", "was", "0.06", "and", "15.2%,", "respectively,", "also", "similar", "to", "what", "is", "known", "for", "North", "America", "and", "Western", "Europe." ]
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Entry of human immunodeficiency type 1 virus (HIV-1) into target cells requires both CD(4)and one of the chemokine receptors. Viruses predominantly use one, or occasionally both, of the major co-receptors CCR5 and CXCR4, although other receptors, including CCR2B and CCR3, function as minor co-receptors. A 32-nucleotide deletion (D32) within the b-chemokine receptor 5 gene (CCR5) has been described in subjects who remain uninfected despite extensive exposition to HIV-1. The heterozygous genotype delays disease progression. This allele is common among Caucasians, but has not been found in people of African or Asian ancestry. A more common transition involving a valine to isoleucine switch in transmembrane domain I of CCR2B (64I), with unknown functional consequences, was found to delay disease progression but not to reduce infection risk. As the Brazilian population consists of a mixture of several ethnic groups, we decided to examine the genotype frequency of these polymorphisms in this country. There were 11.5% CCR5 heterozygotes among the HIV-1 infected population and 12.5% among uninfected individuals, similar to data from North America and Western Europe. The prevalence of CCR2-64I homozygotes and heterozygotes was 0.06 and 15.2%, respectively, also similar to what is known for North America and Western Europe.
15599941
[ "BACKGROUND:", "Recent", "data", "has", "suggested", "that", "polymorphisms", "in", "the", "prostate", "specific", "antigen", "(PSA)", "may", "increase", "prostate", "cancer", "(PC)", "risk.", "The", "PSA", "gene", "contains", "a", "G/A", " ", "substitution", "in", "the", "androgen", "response", "element", "(ARE)", "1", "region.", "The", "androgen", "receptor", "(AR)", "gene", "has", "polymorphic", "regions", "containing", "variable", "length", "glutamine", "and", "glycine", "repeats", "and", "these", "are", "believed", "to", "be", "associated", "with", "PC", "risk.", "The", "effect", "on", "PC", "risks", "from", "PSA", "polymorphisms", "alone", "and", "synergistically", "with", "the", "AR", "gene", "was", "examined", "in", "this", "report.", "METHODS:", "One", "hundred", "PC", "patients", "and", "an", "age", "matched", "cohort", "of", "79", "benign", "prostate", "hyperplasia", "and", "67", "population", "controls", "were", "entered", "in", "this", "study.", "DNA", "was", "extracted", "from", "blood", "and", "PSA/ARE", "promoter", "region", "amplified", "by", "PCR.", "PCR", "products", "were", "cut", "with", "Nhe", "1", "restriction", "enzyme", "to", "distinguish", "G/A", " ", "alleles.", "AR/CAG", "and", "GGC", "repeat", "length", "was", "detected", "by", "automated", "fluorescence", "from", "PCR", "products.", "RESULTS:", "We", "found", "a", "significantly", "higher", "PSA/GG", "distribution", "in", "PC", "(30%)", "than", "either", "benign", "prostatic", "hyperplasia", "(BPH)", "(18%)", "or", "population", "controls", "(16%)", "(P", "=", "0.025).", "Furthermore", "the", "GG", "distribution", "within", "cases", "was", "even", "greater", "in", "younger", "men", "(<", "65", "years;", "42%;", "P", "=", "0.012).", "Additionally,", "when", "PSA", "genotype", "was", "cross", "classified", "with", "CAG", "repeat,", "significantly", "more", "cases", "than", "both", "BPH", "and", "population", "controls", "were", "observed", "to", "have", "a", "short", "(<", "22)", "CAG/GG", "genotype", "(P", "=", "0.006).", "CONCLUSIONS:", "Our", "results", "indicate", "that", "the", "PSA/ARE", "GG", "genotype", "confers", "an", "increased", "risk", "of", "PC", "especially", "among", "younger", "men.", "Moreover,", "we", "confirm", "previous", "results", "that", "a", "short", "glutamine", "repeat", "in", "conjunction", "with", "GG", "genotype", "significantly", "increases", "the", "risk", "of", "malignant", "disease." ]
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BACKGROUND: Recent data has suggested that polymorphisms in the prostate specific antigen (PSA) may increase prostate cancer (PC) risk. The PSA gene contains a G/A substitution in the androgen response element (ARE) 1 region. The androgen receptor (AR) gene has polymorphic regions containing variable length glutamine and glycine repeats and these are believed to be associated with PC risk. The effect on PC risks from PSA polymorphisms alone and synergistically with the AR gene was examined in this report. METHODS: One hundred PC patients and an age matched cohort of 79 benign prostate hyperplasia and 67 population controls were entered in this study. DNA was extracted from blood and PSA/ARE promoter region amplified by PCR. PCR products were cut with Nhe 1 restriction enzyme to distinguish G/A alleles. AR/CAG and GGC repeat length was detected by automated fluorescence from PCR products. RESULTS: We found a significantly higher PSA/GG distribution in PC (30%) than either benign prostatic hyperplasia (BPH) (18%) or population controls (16%) (P = 0.025). Furthermore the GG distribution within cases was even greater in younger men (< 65 years; 42%; P = 0.012). Additionally, when PSA genotype was cross classified with CAG repeat, significantly more cases than both BPH and population controls were observed to have a short (< 22) CAG/GG genotype (P = 0.006). CONCLUSIONS: Our results indicate that the PSA/ARE GG genotype confers an increased risk of PC especially among younger men. Moreover, we confirm previous results that a short glutamine repeat in conjunction with GG genotype significantly increases the risk of malignant disease.
17177139
[ "A", "novel", "mutation", "(", "E333D", ")", "in", "the", "thyroid", "hormone", "beta", "receptor", "causing", "resistance", "to", "thyroid", "hormone", "syndrome." ]
[ 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
A novel mutation ( E333D ) in the thyroid hormone beta receptor causing resistance to thyroid hormone syndrome.
19110214
[ "Analysis", "of", "a", "nuclear", "family", "with", "three", "affected", "offspring", "identified", "an", "autosomal-recessive", "form", "of", "spondyloepimetaphyseal", "dysplasia", "characterized", "by", "severe", "short", "stature", "and", "a", "unique", "constellation", "of", "radiographic", "findings.", "Homozygosity", "for", "a", "haplotype", "that", "was", "identical", "by", "descent", "between", "two", "of", "the", "affected", "individuals", "identified", "a", "locus", "for", "the", "disease", "gene", "within", "a", "17.4", "Mb", "interval", "on", "chromosome", "15,", "a", "region", "containing", "296", "genes.", "These", "genes", "were", "assessed", "and", "ranked", "by", "cartilage", "selectivity", "with", "whole-genome", "microarray", "data,", "revealing", "only", "two", "genes,", "encoding", "aggrecan", "and", "chondroitin", "sulfate", "proteoglycan", "4,", "that", "were", "selectively", "expressed", "in", "cartilage.", "Sequence", "analysis", "of", "aggrecan", "complementary", "DNA", "from", "an", "affected", "individual", "revealed", "homozygosity", "for", "a", "missense", "mutation", "(", "c.6799G", "-->", "A", ")", "that", "predicts", "a", "p.D2267N", " ", "amino", "acid", "substitution", "in", "the", "C-type", "lectin", "domain", "within", "the", "G3", "domain", "of", "aggrecan.", "The", "D2267", "residue", "is", "predicted", "to", "coordinate", "binding", "of", "a", "calcium", "ion,", "which", "influences", "the", "conformational", "binding", "loops", "of", "the", "C-type", "lectin", "domain", "that", "mediate", "interactions", "with", "tenascins", "and", "other", "extracellular-matrix", "proteins.", "Expression", "of", "the", "normal", "and", "mutant", "G3", "domains", "in", "mammalian", "cells", "showed", "that", "the", "mutation", "created", "a", "functional", "N-glycosylation", "site", "but", "did", "not", "adversely", "affect", "protein", "trafficking", "and", "secretion.", "Surface-plasmon-resonance", "studies", "showed", "that", "the", "mutation", "influenced", "the", "binding", "and", "kinetics", "of", "the", "interactions", "between", "the", "aggrecan", "G3", "domain", "and", "tenascin-C.", "These", "findings", "identify", "an", "autosomal-recessive", "skeletal", "dysplasia", "and", "a", "significant", "role", "for", "the", "aggrecan", "C-type", "lectin", "domain", "in", "regulating", "endochondral", "ossification", "and,", "thereby,", "height." ]
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Analysis of a nuclear family with three affected offspring identified an autosomal-recessive form of spondyloepimetaphyseal dysplasia characterized by severe short stature and a unique constellation of radiographic findings. Homozygosity for a haplotype that was identical by descent between two of the affected individuals identified a locus for the disease gene within a 17.4 Mb interval on chromosome 15, a region containing 296 genes. These genes were assessed and ranked by cartilage selectivity with whole-genome microarray data, revealing only two genes, encoding aggrecan and chondroitin sulfate proteoglycan 4, that were selectively expressed in cartilage. Sequence analysis of aggrecan complementary DNA from an affected individual revealed homozygosity for a missense mutation ( c.6799G --> A ) that predicts a p.D2267N amino acid substitution in the C-type lectin domain within the G3 domain of aggrecan. The D2267 residue is predicted to coordinate binding of a calcium ion, which influences the conformational binding loops of the C-type lectin domain that mediate interactions with tenascins and other extracellular-matrix proteins. Expression of the normal and mutant G3 domains in mammalian cells showed that the mutation created a functional N-glycosylation site but did not adversely affect protein trafficking and secretion. Surface-plasmon-resonance studies showed that the mutation influenced the binding and kinetics of the interactions between the aggrecan G3 domain and tenascin-C. These findings identify an autosomal-recessive skeletal dysplasia and a significant role for the aggrecan C-type lectin domain in regulating endochondral ossification and, thereby, height.
21163864
[]
[]
16211251
[ "A", "novel", "single-nucleotide", "substitution,", "Glu", "4", "Lys", ",", "in", "the", "leukotriene", "C4", "synthase", "gene", "associated", "with", "allergic", "diseases." ]
[ 0, 0, 0, 0, 3, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
A novel single-nucleotide substitution, Glu 4 Lys , in the leukotriene C4 synthase gene associated with allergic diseases.
15609295
[ "Compound", "heterozygosity", "for", "a", "novel", "nine-nucleotide", "deletion", "and", "the", "Asn45Ser", " ", "missense", "mutation", "in", "the", "glycoprotein", "IX", "gene", "in", "a", "patient", "with", "Bernard-Soulier", "syndrome." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Compound heterozygosity for a novel nine-nucleotide deletion and the Asn45Ser missense mutation in the glycoprotein IX gene in a patient with Bernard-Soulier syndrome.
15770126
[ "Williams-Beuren", "syndrome", "(WBS)", "is", "a", "neurodevelopmental", "microdeletion", "disorder", "that", "usually", "occurs", "sporadically", "due", "to", "its", "location", "within", "a", "highly", "repetitive", "genomic", "region", "that", "is", "unstable", "and", "prone", "to", "unequal", "cross-over", "during", "meiosis.", "The", "consequential", "loss", "of", "chromosomal", "material", "includes", "approximately", "1.5", "Mb", "of", "DNA", "at", "7q11.23.", "Whilst", "cases", "of", "dominant", "inheritance", "have", "been", "described", "in", "the", "literature,", "there", "have", "been", "few", "reports", "of", "molecular", "confirmation", "and", "none", "have", "carried", "out", "detailed", "genotyping.", "We", "describe", "a", "Bulgarian", "father", "and", "son", "with", "WBS", "detected", "by", "fluorescent", "in", "situ", "hybridisation", "(with", "an", "elastin", "gene", "probe)", "and", "loss", "of", "heterozygosity", "mapping", "using", "microsatellite", "markers", "located", "in", "the", "critical", "region.", "These", "individuals", "appear", "to", "have", "a", "common", "WBS", "heterozygous", "deletion,", "confirming", "the", "expected", "dominant", "transmission", "and", "adding", "to", "the", "few", "familial", "cases", "reported.", "The", "deletion", "includes", "the", "gene", "FKBP6", "which", "has", "recently", "been", "shown", "to", "play", "a", "role", "in", "homologous", "chromosome", "pairing", "in", "meiosis", "and", "male", "fertility", "in", "mouse", "models.", "Homozygous", "Fkbp6", "-/-", "male", "mice", "are", "infertile", "and", "our", "data", "suggests", "that", "haploinsufficiency", "for", "FKBP6", "does", "not", "appear", "to", "preclude", "male", "fertility", "in", "WBS,", "although", "male", "infertility", "involving", "this", "gene", "has", "the", "potential", "to", "follow", "the", "mouse", "model", "as", "a", "human", "autosomal", "recessive", "condition." ]
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Williams-Beuren syndrome (WBS) is a neurodevelopmental microdeletion disorder that usually occurs sporadically due to its location within a highly repetitive genomic region that is unstable and prone to unequal cross-over during meiosis. The consequential loss of chromosomal material includes approximately 1.5 Mb of DNA at 7q11.23. Whilst cases of dominant inheritance have been described in the literature, there have been few reports of molecular confirmation and none have carried out detailed genotyping. We describe a Bulgarian father and son with WBS detected by fluorescent in situ hybridisation (with an elastin gene probe) and loss of heterozygosity mapping using microsatellite markers located in the critical region. These individuals appear to have a common WBS heterozygous deletion, confirming the expected dominant transmission and adding to the few familial cases reported. The deletion includes the gene FKBP6 which has recently been shown to play a role in homologous chromosome pairing in meiosis and male fertility in mouse models. Homozygous Fkbp6 -/- male mice are infertile and our data suggests that haploinsufficiency for FKBP6 does not appear to preclude male fertility in WBS, although male infertility involving this gene has the potential to follow the mouse model as a human autosomal recessive condition.
19394258
[ "The", "first", "founder", "DGUOK", "mutation", "associated", "with", "hepatocerebral", "mitochondrial", "DNA", "depletion", "syndrome." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
The first founder DGUOK mutation associated with hepatocerebral mitochondrial DNA depletion syndrome.
15041272
[]
[]
16157158
[]
[]
18806880
[]
[]
15680411
[]
[]
19476483
[ "BACKGROUND:", "C-C", "chemokine", "receptor", "5", "(CCR5)", "is", "involved", "in", "the", "regulation", "of", "the", "inflammatory", "response.", "Abdominal", "aortic", "aneurysms", "(AAA)", "may", "arise", "as", "the", "result", "of", "a", "chronic", "inflammatory", "process", "which", "is", "influenced", "by", "genetic", "predisposition.", "The", "CCR5", "gene", "is", "associated", "with", "a", "32", "base", "pair", "deletion", "(the", "Delta32", " ", "polymorphism).", "The", "aim", "of", "this", "study", "was", "to", "investigate", "the", "role", "of", "the", "CCR5", "Delta32", " ", "polymorphism", "in", "the", "development", "of", "AAA.", "METHODS:", "A", "case-control", "study", "was", "conducted", "including", "285", "patients", "with", "AAA", "and", "273", "control", "subjects.", "A", "blood", "sample", "was", "taken", "from", "each", "individual", "and", "DNA", "was", "extracted.", "CCR5", "genotype", "was", "determined", "using", "the", "polymerase", "chain", "reaction", "(PCR).", "Flow", "cytometry", "was", "used", "to", "investigate", "the", "biological", "activity", "of", "the", "Delta32", " ", "polymorphism.", "RESULTS:", "There", "was", "no", "significant", "difference", "between", "the", "AAA", "and", "the", "control", "group", "in", "relation", "to", "the", "Delta32", " ", "allele", "frequency", "(AAA", "group", "10%,", "control", "group", "=", "12%,", "P", "=", "0.82,", "chi-squared", "analysis).", "Genotype", "analysis", "revealed", "no", "significant", "difference", "between", "the", "groups", "(AAA", "vs.", "controls,", "wild-type", "homozygotes", "=", "82%", "vs.", "77%,", "heterozygotes", "=", "16%", "vs.", "21%,", "vs.", "Delta32", " ", "homozygotes", "=", "2%", "and", "2%,", "respectively,", "P", "=", "0.33,", "chi-squared", "analysis).", "The", "polymorphism", "was", "shown", "to", "be", "biologically", "active", "with", "the", "number", "of", "Delta32", " ", "alleles", "correlating", "with", "cell", "expression", "of", "ccr5", "as", "detected", "with", "flow", "cytometry", "(P", "<", "or", "=", "0.05).", "CONCLUSION:", "This", "study", "demonstrates", "that", "the", "ccr5", "Delta32", " ", "is", "a", "biologically", "active", "genetic", "polymorphism;", "however,", "there", "is", "no", "association", "between", "this", "polymorphism", "and", "AAA." ]
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BACKGROUND: C-C chemokine receptor 5 (CCR5) is involved in the regulation of the inflammatory response. Abdominal aortic aneurysms (AAA) may arise as the result of a chronic inflammatory process which is influenced by genetic predisposition. The CCR5 gene is associated with a 32 base pair deletion (the Delta32 polymorphism). The aim of this study was to investigate the role of the CCR5 Delta32 polymorphism in the development of AAA. METHODS: A case-control study was conducted including 285 patients with AAA and 273 control subjects. A blood sample was taken from each individual and DNA was extracted. CCR5 genotype was determined using the polymerase chain reaction (PCR). Flow cytometry was used to investigate the biological activity of the Delta32 polymorphism. RESULTS: There was no significant difference between the AAA and the control group in relation to the Delta32 allele frequency (AAA group 10%, control group = 12%, P = 0.82, chi-squared analysis). Genotype analysis revealed no significant difference between the groups (AAA vs. controls, wild-type homozygotes = 82% vs. 77%, heterozygotes = 16% vs. 21%, vs. Delta32 homozygotes = 2% and 2%, respectively, P = 0.33, chi-squared analysis). The polymorphism was shown to be biologically active with the number of Delta32 alleles correlating with cell expression of ccr5 as detected with flow cytometry (P < or = 0.05). CONCLUSION: This study demonstrates that the ccr5 Delta32 is a biologically active genetic polymorphism; however, there is no association between this polymorphism and AAA.
14568816
[]
[]
19681861
[]
[]
12653841
[ "Restricted", "genetic", "defects", "underlie", "human", "complement", "C6", "deficiency." ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
Restricted genetic defects underlie human complement C6 deficiency.
21879313
[ "The", "life", "cycle", "of", "the", "hepatitis", "C", "virus", "(HCV)", "is", "closely", "related", "to", "host", "lipoprotein", "metabolism.", "Serum", "levels", "of", "lipid", "are", "associated", "with", "the", "response", "to", "pegylated", "interferon", "plus", "ribavirin", "(PEG-IFN/RBV)", "therapy,", "while", "single", "nucleotide", "polymorphisms", "(SNPs)", "around", "the", "human", "interleukin", "28B", "(IL28B)", "gene", "locus", "and", "amino", "acid", "substitutions", "in", "the", "core", "region", "of", "the", "HCV", "have", "been", "reported", "to", "affect", "the", "efficacy", "of", "PEG-IFN/RBV", "therapy", "in", "chronic", "hepatitis", "with", "HCV", "genotype", "1b", "infection.", "The", "aim", "of", "this", "study", "was", "to", "elucidate", "the", "relationship", "between", "serum", "lipid", "and", "factors", "that", "are", "able", "to", "predict", "the", "efficacy", "of", "PEG-IFN/RB", "therapy,", "with", "specific", "focus", "on", "apolipoprotein", "B-100", "(apoB-100)", "in", "148", "subjects", "with", "chronic", "HCV", "G1b", "infection.", "Our", "results", "demonstrated", "that", "both", "the", "aa", "70", "substitution", "in", "the", "core", "region", "of", "the", "HCV", "and", "the", "rs8099917", " ", "SNP", "located", "proximal", "to", "the", "IL28B", "were", "independent", "factors", "in", "determining", "serum", "apoB-100", "and", "low-density", "lipoprotein", "(LDL)", "cholesterol", "levels.", "A", "significant", "association", "was", "noted", "between", "higher", "levels", "of", "apoB-100", "(P", "=", "1.1", " ", "10(-3))", "and", "LDL", "cholesterol", "(P", "=", "0.02)", "and", "the", "subjects", "having", "Arg70.", "A", "significant", "association", "was", "also", "observed", "between", "subjects", "carrying", "the", "rs8099917", " ", "TT", "responder", "genotype", "and", "higher", "levels", "of", "apoB-100", "(P", "=", "6.4", " ", "10(-3))", "and", "LDL", "cholesterol", "(P", "=", "4.2", " ", "10(-3)).", "Our", "results", "suggest", "that", "apoB-100", "and", "LDL", "cholesterol", "are", "markers", "of", "impaired", "cellular", "lipoprotein", "pathways", "and/or", "host", "endogenous", "interferon", "response", "to", "HCV", "in", "chronic", "HCV", "infection.", "In", "particular,", "serum", "apoB-100", "concentration", "might", "be", "an", "informative", "marker", "for", "judging", "changes", "in", "HCV-associated", "intracellular", "lipoprotein", "metabolism", "in", "patients", "carrying", "the", "rs8099917", " ", "responder", "genotype." ]
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The life cycle of the hepatitis C virus (HCV) is closely related to host lipoprotein metabolism. Serum levels of lipid are associated with the response to pegylated interferon plus ribavirin (PEG-IFN/RBV) therapy, while single nucleotide polymorphisms (SNPs) around the human interleukin 28B (IL28B) gene locus and amino acid substitutions in the core region of the HCV have been reported to affect the efficacy of PEG-IFN/RBV therapy in chronic hepatitis with HCV genotype 1b infection. The aim of this study was to elucidate the relationship between serum lipid and factors that are able to predict the efficacy of PEG-IFN/RB therapy, with specific focus on apolipoprotein B-100 (apoB-100) in 148 subjects with chronic HCV G1b infection. Our results demonstrated that both the aa 70 substitution in the core region of the HCV and the rs8099917 SNP located proximal to the IL28B were independent factors in determining serum apoB-100 and low-density lipoprotein (LDL) cholesterol levels. A significant association was noted between higher levels of apoB-100 (P = 1.1 10(-3)) and LDL cholesterol (P = 0.02) and the subjects having Arg70. A significant association was also observed between subjects carrying the rs8099917 TT responder genotype and higher levels of apoB-100 (P = 6.4 10(-3)) and LDL cholesterol (P = 4.2 10(-3)). Our results suggest that apoB-100 and LDL cholesterol are markers of impaired cellular lipoprotein pathways and/or host endogenous interferon response to HCV in chronic HCV infection. In particular, serum apoB-100 concentration might be an informative marker for judging changes in HCV-associated intracellular lipoprotein metabolism in patients carrying the rs8099917 responder genotype.
17628794
[ "Manganese", "superoxide", "dismutase", "(Mn-SOD)", "gene", "polymorphisms", "in", "urolithiasis." ]
[ 0, 0, 0, 0, 0, 0, 0, 0 ]
Manganese superoxide dismutase (Mn-SOD) gene polymorphisms in urolithiasis.
22028770
[ "BACKGROUND:", "The", "apolipoprotein", "E", "gene", "(APOE)", "coding", "polymorphism", "modifies", "the", "risks", "of", "Alzheimer's", "disease,", "type", "2", "diabetes,", "and", "coronary", "heart", "disease.", "Aside", "from", "the", "coding", "variants,", "single", "nucleotide", "polymorphism", "(SNP)", "of", "the", "APOE", "promoter", "has", "also", "been", "shown", "to", "modify", "the", "risk", "of", "Alzheimer's", "disease.", "METHODOLOGY/PRINCIPAL", "FINDINGS:", "In", "this", "study", "we", "investigate", "the", "genotype-function", "relationship", "of", "APOE", "promoter", "polymorphism", "at", "molecular", "level", "and", "at", "physiological", "level:", "i.e.,", "in", "transcription", "control", "of", "the", "gene", "and", "in", "the", "risk", "of", "type", "2", "diabetes.", "In", "molecular", "studies,", "the", "effect", "of", "the", "APOE", "-491A/T", " ", "(", "rs449647", ")", "polymorphism", "on", "gene", "transcription", "was", "accessed", "by", "dual-luciferase", "reporter", "gene", "assays.", "The", "-491", "A", "to", "T", " ", "substitution", "decreased", "the", "activity", "(p<0.05)", "of", "the", "cloned", "APOE", "promoter", "(-1017", "to", "+406).", "Using", "the", "-501", "to", "-481", "nucleotide", "sequence", "of", "the", "APOE", "promoter", "as", "a", "'bait'", "to", "screen", "the", "human", "brain", "cDNA", "library", "by", "yeast", "one-hybrid", "system", "yielded", "ATF4,", "an", "endoplasmic", "reticulum", "stress", "response", "gene,", "as", "one", "of", "the", "interacting", "factors.", "Electrophoretic-mobility-shift", "assays", "(EMSA)", "and", "chromatin", "immuno-precipitation", "(ChIP)", "analyses", "further", "substantiated", "the", "physical", "interaction", "between", "ATF4", "and", "the", "APOE", "promoter.", "Over-expression", "of", "ATF4", "stimulated", "APOE", "expression", "whereas", "siRNA", "against", "ATF4", "suppressed", "the", "expression", "of", "the", "gene.", "However,", "interaction", "between", "APOE", "promoter", "and", "ATF4", "was", "not", "-491A/T", "-specific.", "At", "physiological", "level,", "the", "genotype-function", "relationship", "of", "APOE", "promoter", "polymorphism", "was", "studied", "in", "type", "2", "diabetes.", "In", "630", "cases", "and", "595", "controls,", "three", "APOE", "promoter", "SNPs", "-491A/T", ",", "-219G/T", " ", "(", "rs405509", "),", "and", "+113G/C", " ", "(", "rs440446", ")", "were", "genotyped", "and", "tested", "for", "association", "with", "type", "2", "diabetes", "in", "Hong", "Kong", "Chinese.", "No", "SNP", "or", "haplotype", "association", "with", "type", "2", "diabetes", "was", "detected.", "CONCLUSIONS/SIGNIFICANCE:", "At", "molecular", "level,", "polymorphism", "-491A/T", " ", "and", "ATF4", "elicit", "independent", "control", "of", "APOE", "gene", "expression.", "At", "physiological", "level,", "no", "genotype-risk", "association", "was", "detected", "between", "the", "studied", "APOE", "promoter", "SNPs", "and", "type", "2", "diabetes", "in", "Hong", "Kong", "Chinese." ]
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BACKGROUND: The apolipoprotein E gene (APOE) coding polymorphism modifies the risks of Alzheimer's disease, type 2 diabetes, and coronary heart disease. Aside from the coding variants, single nucleotide polymorphism (SNP) of the APOE promoter has also been shown to modify the risk of Alzheimer's disease. METHODOLOGY/PRINCIPAL FINDINGS: In this study we investigate the genotype-function relationship of APOE promoter polymorphism at molecular level and at physiological level: i.e., in transcription control of the gene and in the risk of type 2 diabetes. In molecular studies, the effect of the APOE -491A/T ( rs449647 ) polymorphism on gene transcription was accessed by dual-luciferase reporter gene assays. The -491 A to T substitution decreased the activity (p<0.05) of the cloned APOE promoter (-1017 to +406). Using the -501 to -481 nucleotide sequence of the APOE promoter as a 'bait' to screen the human brain cDNA library by yeast one-hybrid system yielded ATF4, an endoplasmic reticulum stress response gene, as one of the interacting factors. Electrophoretic-mobility-shift assays (EMSA) and chromatin immuno-precipitation (ChIP) analyses further substantiated the physical interaction between ATF4 and the APOE promoter. Over-expression of ATF4 stimulated APOE expression whereas siRNA against ATF4 suppressed the expression of the gene. However, interaction between APOE promoter and ATF4 was not -491A/T -specific. At physiological level, the genotype-function relationship of APOE promoter polymorphism was studied in type 2 diabetes. In 630 cases and 595 controls, three APOE promoter SNPs -491A/T , -219G/T ( rs405509 ), and +113G/C ( rs440446 ) were genotyped and tested for association with type 2 diabetes in Hong Kong Chinese. No SNP or haplotype association with type 2 diabetes was detected. CONCLUSIONS/SIGNIFICANCE: At molecular level, polymorphism -491A/T and ATF4 elicit independent control of APOE gene expression. At physiological level, no genotype-risk association was detected between the studied APOE promoter SNPs and type 2 diabetes in Hong Kong Chinese.
15316799
[]
[]
15377356
[ "Features", "of", "epidermolysis", "bullosa", "simplex", "due", "to", "mutations", "in", "the", "ectodomain", "of", "type", "XVII", "collagen." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Features of epidermolysis bullosa simplex due to mutations in the ectodomain of type XVII collagen.
21126715
[]
[]
16838170
[ "Single", "nucleotide", "polymorphisms", "of", "the", "HNF4alpha", "gene", "are", "associated", "with", "the", "conversion", "to", "type", "2", "diabetes", "mellitus:", "the", "STOP-NIDDM", "trial." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Single nucleotide polymorphisms of the HNF4alpha gene are associated with the conversion to type 2 diabetes mellitus: the STOP-NIDDM trial.
18798060
[ "The", "influence", "of", "interstitial", "collagenase-1", "genotype", "polymorphism", "on", "colorectal", "cancer", "risk", "in", "Iranian", "population." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
The influence of interstitial collagenase-1 genotype polymorphism on colorectal cancer risk in Iranian population.
17549393
[ "Van", "der", "Woude", "syndrome", "(VWS)", "is", "the", "most", "common", "type", "of", "syndromic", "orofacial", "cleft,", "which", "accounts", "for", "approximately", "2%", "of", "all", "cleft", "lip", "and", "palate", "cases.", "It", "is", "characterised", "by", "variable", "association", "of", "lower", "lip", "pits,", "cleft", "lip", "and", "cleft", "palate,", "and", "hypodontia.", "VWS", "arises", "as", "the", "result", "of", "mutations", "in", "the", "gene", "encoding", "interferon", "regulatory", "factor", "6", "(IRF6).", "The", "disorder", "is", "transmitted", "in", "an", "autosomal", "dominant", "manner,", "with", "high", "penetrance", "and", "variable", "expressivity.", "Very", "recently,", "mutations", "of", "the", "IRF6", "gene", "in", "exons", "2-9", "have", "been", "found", "in", "VWS", "patients,", "suggesting", "that", "this", "gene", "plays", "an", "important", "role", "in", "orofacial", "development.", "We", "report", "a", "novel", "mutation", "of", "the", "IRF6", "gene", "in", "a", "German", "family.", "Five", "out", "of", "the", "12", "persons", "affected", "were", "able", "to", "be", "investigated.", "The", "mutation", "produced", "a", "stop", "codon", "within", "exon", "4", "of", "the", "IRF6", "gene.", "All", "5", "patients", "were", "heterozygous", "for", "a", "base", "substitution", "c.201C>A", " ", "changing", "the", "tyrosine", "codon", "at", "amino", "acid", "position", "67", "into", "a", "stop", "codon", "(", "p.Y67X", ")", "in", "exon", "4.", "The", "premature", "stop", "codon", "was", "responsible", "for", "a", "truncated", "protein", "lacking", "parts", "of", "the", "DNA-", "binding", "domain", "and", "the", "complete", "Smad-interferon", "regulatory", "factor-binding", "domain", "probably", "essential", "for", "interactions", "with", "the", "Smad", "transcription", "factors." ]
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Van der Woude syndrome (VWS) is the most common type of syndromic orofacial cleft, which accounts for approximately 2% of all cleft lip and palate cases. It is characterised by variable association of lower lip pits, cleft lip and cleft palate, and hypodontia. VWS arises as the result of mutations in the gene encoding interferon regulatory factor 6 (IRF6). The disorder is transmitted in an autosomal dominant manner, with high penetrance and variable expressivity. Very recently, mutations of the IRF6 gene in exons 2-9 have been found in VWS patients, suggesting that this gene plays an important role in orofacial development. We report a novel mutation of the IRF6 gene in a German family. Five out of the 12 persons affected were able to be investigated. The mutation produced a stop codon within exon 4 of the IRF6 gene. All 5 patients were heterozygous for a base substitution c.201C>A changing the tyrosine codon at amino acid position 67 into a stop codon ( p.Y67X ) in exon 4. The premature stop codon was responsible for a truncated protein lacking parts of the DNA- binding domain and the complete Smad-interferon regulatory factor-binding domain probably essential for interactions with the Smad transcription factors.
16796766
[ "BACKGROUND:", "Familial", "Hypercholesterolemia", "is", "a", "common", "autosomal", "dominantly", "inherited", "disease", "that", "is", "most", "frequently", "caused", "by", "mutations", "in", "the", "gene", "encoding", "the", "receptor", "for", "low", "density", "lipoproteins", "(LDLR).", "Deletions", "and", "other", "major", "structural", "rearrangements", "of", "the", "LDLR", "gene", "account", "for", "approximately", "5%", "of", "the", "mutations", "in", "many", "populations.", "METHODS:", "Five", "genomic", "deletions", "in", "the", "LDLR", "gene", "were", "characterized", "by", "amplification", "of", "mutated", "alleles", "and", "sequencing", "to", "identify", "genomic", "breakpoints.", "A", "diagnostic", "assay", "based", "on", "duplex", "PCR", "for", "the", "exon", "7-8", "deletion", "was", "developed", "to", "discriminate", "between", "heterozygotes", "and", "normals,", "and", "bioinformatic", "analyses", "were", "used", "to", "identify", "interspersed", "repeats", "flanking", "the", "deletions.", "RESULTS:", "In", "one", "case", "15", "bp", "had", "been", "inserted", "at", "the", "site", "of", "the", "deleted", "DNA,", "and,", "in", "all", "five", "cases,", "Alu", "elements", "flanked", "the", "sites", "where", "deletions", "had", "occurred.", "An", "assay", "developed", "to", "discriminate", "the", "wildtype", "and", "the", "deletion", "allele", "in", "a", "simple", "duplex", "PCR", "detected", "three", "FH", "patients", "as", "heterozygotes,", "and", "two", "individuals", "with", "normal", "lipid", "values", "were", "detected", "as", "normal", "homozygotes.", "CONCLUSION:", "The", "identification", "of", "the", "breakpoints", "should", "make", "it", "possible", "to", "develop", "specific", "tests", "for", "these", "mutations,", "and", "the", "data", "provide", "further", "evidence", "for", "the", "role", "of", "Alu", "repeats", "in", "intragenic", "deletions." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
BACKGROUND: Familial Hypercholesterolemia is a common autosomal dominantly inherited disease that is most frequently caused by mutations in the gene encoding the receptor for low density lipoproteins (LDLR). Deletions and other major structural rearrangements of the LDLR gene account for approximately 5% of the mutations in many populations. METHODS: Five genomic deletions in the LDLR gene were characterized by amplification of mutated alleles and sequencing to identify genomic breakpoints. A diagnostic assay based on duplex PCR for the exon 7-8 deletion was developed to discriminate between heterozygotes and normals, and bioinformatic analyses were used to identify interspersed repeats flanking the deletions. RESULTS: In one case 15 bp had been inserted at the site of the deleted DNA, and, in all five cases, Alu elements flanked the sites where deletions had occurred. An assay developed to discriminate the wildtype and the deletion allele in a simple duplex PCR detected three FH patients as heterozygotes, and two individuals with normal lipid values were detected as normal homozygotes. CONCLUSION: The identification of the breakpoints should make it possible to develop specific tests for these mutations, and the data provide further evidence for the role of Alu repeats in intragenic deletions.
18241046
[ "Depressed", "calcium", "handling", "by", "the", "sarcoplasmic", "reticulum", "(SR)", "Ca-ATPase", "and", "its", "regulator", "phospholamban", "(PLN)", "is", "a", "key", "characteristic", "of", "human", "and", "experimental", "heart", "failure.", "Accumulating", "evidence", "indicates", "that", "increases", "in", "the", "relative", "levels", "of", "PLN", "to", "Ca-ATPase", "in", "failing", "hearts", "and", "resulting", "inhibition", "of", "Ca", "sequestration", "during", "diastole,", "impairs", "contractility.", "Here,", "we", "identified", "a", "genetic", "variant", "in", "the", "PLN", "promoter", "region,", "which", "increases", "its", "expression", "and", "may", "serve", "as", "a", "genetic", "modifier", "in", "dilated", "cardiomyopathy", "(DCM).", "The", "variant", "AF177763.1:", "g.203A>C", " ", "(at", "position", "-36", "bp", "relative", "to", "the", "PLN", "transcriptional", "start", "site)", "was", "found", "only", "in", "the", "heterozygous", "form", "in", "1", "out", "of", "296", "normal", "subjects", "and", "in", "22", "out", "of", "381", "cardiomyopathy", "patients", "(heart", "failure", "at", "age", "of", "18-44", "years,", "ejection", "fraction=22+/-9%).", "In", "vitro", "analysis,", "using", "luciferase", "as", "a", "reporter", "gene", "in", "rat", "neonatal", "cardiomyocytes,", "indicated", "that", "the", "PLN-variant", "increased", "activity", "by", "24%", "compared", "to", "the", "wild", "type.", "Furthermore,", "the", "g.203A>C", " ", "substitution", "altered", "the", "specific", "sequence", "of", "the", "steroid", "receptor", "for", "the", "glucocorticoid", "nuclear", "receptor", "(GR)/transcription", "factor", "in", "the", "PLN", "promoter,", "resulting", "in", "enhanced", "binding", "to", "the", "mutated", "DNA", "site.", "These", "findings", "suggest", "that", "the", "g.203A>C", " ", "genetic", "variant", "in", "the", "human", "PLN", "promoter", "may", "contribute", "to", "depressed", "contractility", "and", "accelerate", "functional", "deterioration", "in", "heart", "failure." ]
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Depressed calcium handling by the sarcoplasmic reticulum (SR) Ca-ATPase and its regulator phospholamban (PLN) is a key characteristic of human and experimental heart failure. Accumulating evidence indicates that increases in the relative levels of PLN to Ca-ATPase in failing hearts and resulting inhibition of Ca sequestration during diastole, impairs contractility. Here, we identified a genetic variant in the PLN promoter region, which increases its expression and may serve as a genetic modifier in dilated cardiomyopathy (DCM). The variant AF177763.1: g.203A>C (at position -36 bp relative to the PLN transcriptional start site) was found only in the heterozygous form in 1 out of 296 normal subjects and in 22 out of 381 cardiomyopathy patients (heart failure at age of 18-44 years, ejection fraction=22+/-9%). In vitro analysis, using luciferase as a reporter gene in rat neonatal cardiomyocytes, indicated that the PLN-variant increased activity by 24% compared to the wild type. Furthermore, the g.203A>C substitution altered the specific sequence of the steroid receptor for the glucocorticoid nuclear receptor (GR)/transcription factor in the PLN promoter, resulting in enhanced binding to the mutated DNA site. These findings suggest that the g.203A>C genetic variant in the human PLN promoter may contribute to depressed contractility and accelerate functional deterioration in heart failure.
14587045
[ "Beta-thalassemia", "in", "association", "with", "a", "new", "delta-chain", "hemoglobin", "variant", "[delta116(g18)", "Arg-->Leu", "]:", "implications", "for", "carrier", "screening", "and", "prenatal", "diagnosis." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0 ]
Beta-thalassemia in association with a new delta-chain hemoglobin variant [delta116(g18) Arg-->Leu ]: implications for carrier screening and prenatal diagnosis.
14533983
[ "Frequency", "of", "polymorphisms", "of", "genes", "coding", "for", "HIV-1", "co-receptors", "CCR5", "and", "CCR2", "in", "a", "Brazilian", "population." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Frequency of polymorphisms of genes coding for HIV-1 co-receptors CCR5 and CCR2 in a Brazilian population.
19477219
[]
[]
12653841
[]
[]
21103668
[]
[]
16322765
[ "Allele-specific", "amplification", "in", "cancer", "revealed", "by", "SNP", "array", "analysis." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Allele-specific amplification in cancer revealed by SNP array analysis.
12737948
[ "Mutations", "in", "the", "human", "ferrochelatase", "gene", "(FECH)", "are", "the", "primary", "cause", "of", "the", "inborn", "disorder", "erythropoietic", "protoporphyria", "(EPP).", "While", "the", "majority", "of", "the", "EPP", "patients", "exhibit", "only", "photosensitivity,", "a", "small", "percentage", "of", "patients", "(approximately", "2%)", "develop", "liver", "complications", "in", "addition", "to", "the", "cutaneous", "symptoms.", "In", "this", "study,", "the", "FECH", "gene", "of", "an", "Israeli", "EPP", "patient", "who", "suffered", "from", "EPP-related", "liver", "complications", "was", "sequenced.", "A", "splicing", "defect", "IVS10+1,", "g-->t", ",", "which", "is", "known", "to", "cause", "the", "deletion", "of", "exon", "10,", "was", "identified", "in", "the", "index", "patient", "as", "well", "as", "in", "his", "symptomatic", "older", "sister", "and", "his", "asymptomatic", "mother.", "Like", "the", "other", "12", "known", "FECH", "mutations", "associated", "with", "liver", "complications,", "IVS10+1,", "g-->t", " ", "is", "a", "\"null-allele\"", "mutation.", "Although", "the", "two", "siblings", "with", "overt", "EPP", "share", "an", "identical", "genotype", "with", "respect", "to", "both", "the", "mutation", "on", "one", "FECH", "allele", "and", "three", "intragenic", "single", "nucleotide", "polymorphisms,", "-251G", ",", "IVS1-23T", ",", "and", "IVS3-48C", " ", "on", "the", "other", "allele,", "the", "sister", "of", "the", "index", "patient", "has", "so", "far", "shown", "no", "signs", "of", "liver", "involvement,", "suggesting", "that", "additional", "factors", "might", "account", "for", "the", "liver", "disease", "in", "EPP." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Mutations in the human ferrochelatase gene (FECH) are the primary cause of the inborn disorder erythropoietic protoporphyria (EPP). While the majority of the EPP patients exhibit only photosensitivity, a small percentage of patients (approximately 2%) develop liver complications in addition to the cutaneous symptoms. In this study, the FECH gene of an Israeli EPP patient who suffered from EPP-related liver complications was sequenced. A splicing defect IVS10+1, g-->t , which is known to cause the deletion of exon 10, was identified in the index patient as well as in his symptomatic older sister and his asymptomatic mother. Like the other 12 known FECH mutations associated with liver complications, IVS10+1, g-->t is a "null-allele" mutation. Although the two siblings with overt EPP share an identical genotype with respect to both the mutation on one FECH allele and three intragenic single nucleotide polymorphisms, -251G , IVS1-23T , and IVS3-48C on the other allele, the sister of the index patient has so far shown no signs of liver involvement, suggesting that additional factors might account for the liver disease in EPP.
19132389
[ "PURPOSE:", "Human", "pepsinogen", "C", "(PGC)", "is", "an", "aspartic", "protease", "produced", "specifically", "by", "the", "gastric", "mucosa,", "and", "is", "considered", "as", "a", "mature", "marker", "of", "gastric", "epithelium.", "This", "study", "examined", "the", "contributions", "of", "PGC", "polymorphisms", "and", "the", "Helicobacter", "pylori", "(H.", "pylori)", "infection", "to", "the", "risk", "of", "gastric", "cancer", "(GC),", "and", "its", "precancerous", "conditions", "in", "a", "Northeast", "Chinese", "population.", "METHODS:", "The", "PGC", "insertion/deletion", "polymorphism", "was", "evaluated", "by", "polymerase", "chain", "reaction", "analysis,", "followed", "by", "direct", "DNA", "sequencing", "in", "564", "cases", "of", "GC,", "atrophic", "gastritis", "(AG),", "gastric", "ulcer", "(GU)", "and", "superficial", "gastritis", "(as", "control).", "All", "cases", "were", "frequency-matched", "1:1", "by", "gender", "and", "age", "(+/-5).", "H.", "pylori", "infection", "was", "identified", "by", "serum", "anti-H.", "pylori", "IgG", "measurement", "through", "enzyme-linked", "immunosorbent", "assay.", "RESULTS:", "Patients", "with", "a", "homozygous", "PGC", "allele", "1", "genotype", "had", "a", "significant", "risk", "of", "AG", "[adjusted", "odds", "ratio", "(OR)", "3.11;", "95%", "confidence", "interval", "(CI)", "1.44-6.71]", "or", "of", "GC", "(OR", "3.00;", "95%", "CI", "1.38-6.51),", "and", "a", "significantly", "elevated", "risk", "of", "intestinal", "metaplasia", "(OR", "1.90,", "95%", "CI", "1.11-3.27).", "PGC", "polymorphism", "with", "H.", "pylori", "infection", "increased", "risk", "of", "GU", "(OR", "8.69;", "95%", "CI", "1.01-74.69),", "and", "AG", "(OR", "11.12;", "95%", "CI", "1.37-90.84)", "or", "GC", "(OR", "10.61;", "95%", "CI", "1.28-87.79)", "in", "a", "super-multiplicative", "manner.", "The", "S", "value", "was", "5.40,", "6.48", "and", "4.34;", "and", "the", "AP", "value", "was", "72.09,", "7.00", "and", "69.69%,", "respectively.", "CONCLUSIONS:", "The", "PGC", "gene", "polymorphism", "increases", "an", "individual's", "susceptibility", "to", "GC", "and", "its", "precancerous", "conditions.", "Moreover,", "the", "PGC", "gene", "polymorphism", "shows", "a", "positive", "link", "to", "H.", "pylori", "infection", "in", "the", "development", "of", "GC." ]
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PURPOSE: Human pepsinogen C (PGC) is an aspartic protease produced specifically by the gastric mucosa, and is considered as a mature marker of gastric epithelium. This study examined the contributions of PGC polymorphisms and the Helicobacter pylori (H. pylori) infection to the risk of gastric cancer (GC), and its precancerous conditions in a Northeast Chinese population. METHODS: The PGC insertion/deletion polymorphism was evaluated by polymerase chain reaction analysis, followed by direct DNA sequencing in 564 cases of GC, atrophic gastritis (AG), gastric ulcer (GU) and superficial gastritis (as control). All cases were frequency-matched 1:1 by gender and age (+/-5). H. pylori infection was identified by serum anti-H. pylori IgG measurement through enzyme-linked immunosorbent assay. RESULTS: Patients with a homozygous PGC allele 1 genotype had a significant risk of AG [adjusted odds ratio (OR) 3.11; 95% confidence interval (CI) 1.44-6.71] or of GC (OR 3.00; 95% CI 1.38-6.51), and a significantly elevated risk of intestinal metaplasia (OR 1.90, 95% CI 1.11-3.27). PGC polymorphism with H. pylori infection increased risk of GU (OR 8.69; 95% CI 1.01-74.69), and AG (OR 11.12; 95% CI 1.37-90.84) or GC (OR 10.61; 95% CI 1.28-87.79) in a super-multiplicative manner. The S value was 5.40, 6.48 and 4.34; and the AP value was 72.09, 7.00 and 69.69%, respectively. CONCLUSIONS: The PGC gene polymorphism increases an individual's susceptibility to GC and its precancerous conditions. Moreover, the PGC gene polymorphism shows a positive link to H. pylori infection in the development of GC.
16419642
[]
[]
17083016
[]
[]
19082493
[ "Combination", "of", "polymorphisms", "within", "5'", "and", "3'", "untranslated", "regions", "of", "thymidylate", "synthase", "gene", "modulates", "survival", "in", "5", "fluorouracil-treated", "colorectal", "cancer", "patients." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Combination of polymorphisms within 5' and 3' untranslated regions of thymidylate synthase gene modulates survival in 5 fluorouracil-treated colorectal cancer patients.
15064320
[ "The", "goal", "of", "this", "study", "was", "to", "perform", "5-alpha-reductase", "type", "2", "gene", "(SRD5A2)", "analysis", "in", "a", "male", "pseudohermaphrodite", "(MPH)", "patient", "with", "normal", "testosterone", "(T)", "production", "and", "normal", "androgen", "receptor", "(AR)", "gene", "coding", "sequences.", "A", "patient", "of", "Chinese", "origin", "with", "ambiguous", "genitalia", "at", "14", "months,", "a", "46,XY", "karyotype,", "and", "normal", "T", "secretion", "under", "human", "chorionic", "gonadotropin", "(hCG)", "stimulation", "underwent", "a", "gonadectomy", "at", "20", "months.", "Exons", "1-8", "of", "the", "AR", "gene", "and", "exons", "1-5", "of", "the", "SRD5A2", "gene", "were", "sequenced", "from", "peripheral", "blood", "DNA.", "AR", "gene", "coding", "sequences", "were", "normal.", "SRD5A2", "gene", "analysis", "revealed", "2", "consecutive", "mutations", "in", "exon", "4,", "each", "located", "in", "a", "different", "allele:", "1)", "a", "T", "nucleotide", "deletion,", "which", "predicts", "a", "frameshift", "mutation", "from", "codon", "219,", "and", "2)", "a", "missense", "mutation", "at", "codon", "227,", "where", "the", "substitution", "of", "guanine", "(CGA)", "by", "adenine", "(CAA)", "predicts", "a", "glutamine", "replacement", "of", "arginine", "(", "R227Q", ").", "Testes", "located", "in", "the", "inguinal", "canal", "showed", "a", "normal", "morphology", "for", "age.", "The", "patient", "was", "a", "compound", "heterozygote", "for", "SRD5A2", "mutations,", "carrying", "2", "mutations", "in", "exon", "4.", "The", "patient", "showed", "an", "R227Q", " ", "mutation", "that", "has", "been", "described", "in", "an", "Asian", "population", "and", "MPH", "patients,", "along", "with", "a", "novel", "frameshift", "mutation,", "Tdel219", ".", "Testis", "morphology", "showed", "that,", "during", "early", "infancy,", "the", "5-alpha-reductase", "enzyme", "deficiency", "may", "not", "have", "affected", "interstitial", "or", "tubular", "development." ]
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The goal of this study was to perform 5-alpha-reductase type 2 gene (SRD5A2) analysis in a male pseudohermaphrodite (MPH) patient with normal testosterone (T) production and normal androgen receptor (AR) gene coding sequences. A patient of Chinese origin with ambiguous genitalia at 14 months, a 46,XY karyotype, and normal T secretion under human chorionic gonadotropin (hCG) stimulation underwent a gonadectomy at 20 months. Exons 1-8 of the AR gene and exons 1-5 of the SRD5A2 gene were sequenced from peripheral blood DNA. AR gene coding sequences were normal. SRD5A2 gene analysis revealed 2 consecutive mutations in exon 4, each located in a different allele: 1) a T nucleotide deletion, which predicts a frameshift mutation from codon 219, and 2) a missense mutation at codon 227, where the substitution of guanine (CGA) by adenine (CAA) predicts a glutamine replacement of arginine ( R227Q ). Testes located in the inguinal canal showed a normal morphology for age. The patient was a compound heterozygote for SRD5A2 mutations, carrying 2 mutations in exon 4. The patient showed an R227Q mutation that has been described in an Asian population and MPH patients, along with a novel frameshift mutation, Tdel219 . Testis morphology showed that, during early infancy, the 5-alpha-reductase enzyme deficiency may not have affected interstitial or tubular development.
17595233
[]
[]
15599941
[ "Polymorphic", "forms", "of", "prostate", "specific", "antigen", "and", "their", "interaction", "with", "androgen", "receptor", "trinucleotide", "repeats", "in", "prostate", "cancer." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Polymorphic forms of prostate specific antigen and their interaction with androgen receptor trinucleotide repeats in prostate cancer.
17628794
[]
[]
16970763
[ "Mutations", "in", "the", "NDP", "gene:", "contribution", "to", "Norrie", "disease,", "familial", "exudative", "vitreoretinopathy", "and", "retinopathy", "of", "prematurity." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Mutations in the NDP gene: contribution to Norrie disease, familial exudative vitreoretinopathy and retinopathy of prematurity.
16840830
[ "Multiple", "endocrine", "neoplasia", "type", "1", "(MEN1)", "is", "characterized", "by", "parathyroid,", "enteropancreatic", "endocrine", "and", "pituitary", "adenomas", "as", "well", "as", "germline", "mutation", "of", "the", "MEN1", "gene.", "We", "describe", "2", "families", "with", "MEN1", "with", "novel", "mutations", "in", "the", "MEN1", "gene.", "One", "family", "was", "of", "Turkish", "origin,", "and", "the", "index", "patient", "had", "primary", "hyperparathyroidism", "(PHPT)", "plus", "a", "prolactinoma;", "three", "relatives", "had", "PHPT", "only.", "The", "index", "patient", "in", "the", "second", "family", "was", "a", "46-yr-old", "woman", "of", "Chinese", "origin", "living", "in", "Taiwan.", "This", "patient", "presented", "with", "a", "complaint", "of", "epigastric", "pain", "and", "watery", "diarrhea", "over", "the", "past", "3", "months,", "and", "had", "undergone", "subtotal", "parathyroidectomy", "and", "enucleation", "of", "pancreatic", "islet", "cell", "tumor", "about", "10", "yr", "before.", "There", "was", "also", "a", "prolactinoma.", "Sequence", "analysis", "of", "the", "MEN1", "gene", "from", "leukocyte", "genomic", "DNA", "revealed", "heterozygous", "mutations", "in", "both", "probands.", "The", "Turkish", "patient", "and", "her", "affected", "relatives", "all", "had", "a", "heterozygous", "A", "to", "G", "transition", "at", "codon", "557", "(", "AAG-->GAG", ")", "of", "exon", "10", "of", "MEN1", "that", "results", "in", "a", "replacement", "of", "lysine", "by", "glutamic", "acid.", "The", "Chinese", "index", "patient", "and", "one", "of", "her", "siblings", "had", "a", "heterozygous", "mutation", "at", "codon", "418", "of", "exon", "9", "(", "GAC-->TAT", ")", "that", "results", "in", "a", "substitution", "of", "aspartic", "acid", "by", "tyrosine.", "In", "conclusion,", "we", "have", "identified", "2", "novel", "missense", "mutations", "in", "the", "MEN1", "gene." ]
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Multiple endocrine neoplasia type 1 (MEN1) is characterized by parathyroid, enteropancreatic endocrine and pituitary adenomas as well as germline mutation of the MEN1 gene. We describe 2 families with MEN1 with novel mutations in the MEN1 gene. One family was of Turkish origin, and the index patient had primary hyperparathyroidism (PHPT) plus a prolactinoma; three relatives had PHPT only. The index patient in the second family was a 46-yr-old woman of Chinese origin living in Taiwan. This patient presented with a complaint of epigastric pain and watery diarrhea over the past 3 months, and had undergone subtotal parathyroidectomy and enucleation of pancreatic islet cell tumor about 10 yr before. There was also a prolactinoma. Sequence analysis of the MEN1 gene from leukocyte genomic DNA revealed heterozygous mutations in both probands. The Turkish patient and her affected relatives all had a heterozygous A to G transition at codon 557 ( AAG-->GAG ) of exon 10 of MEN1 that results in a replacement of lysine by glutamic acid. The Chinese index patient and one of her siblings had a heterozygous mutation at codon 418 of exon 9 ( GAC-->TAT ) that results in a substitution of aspartic acid by tyrosine. In conclusion, we have identified 2 novel missense mutations in the MEN1 gene.
17635946
[]
[]
14623461
[]
[]
20515563
[ "Correlation", "between", "thymidylate", "synthase", "gene", "variants,", "RNA", "and", "protein", "levels", "in", "primary", "colorectal", "adenocarcinomas." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Correlation between thymidylate synthase gene variants, RNA and protein levels in primary colorectal adenocarcinomas.
21750150
[]
[]
20887110
[ "Impact", "of", "5,10-methylenetetrahydrofolate", "reductase", "gene", "polymorphism", "on", "neural", "tube", "defects." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Impact of 5,10-methylenetetrahydrofolate reductase gene polymorphism on neural tube defects.
17962469
[ "Novel", "TULP1", "mutation", "causing", "leber", "congenital", "amaurosis", "or", "early", "onset", "retinal", "degeneration." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Novel TULP1 mutation causing leber congenital amaurosis or early onset retinal degeneration.
17683901
[ "Achondroplasia", "is", "the", "most", "common", "form", "of", "dwarfism", "and", "has", "an", "incidence", "of", "approximately", "1/7500.", "In", "more", "than", "98%", "of", "cases,", "the", "disease", "is", "associated", "with", "a", "G", "to", "A", "or", "G", "to", "C", "substitution", "at", "nucleotide", "position", "1138", "(", "p.G380R", ")", "of", "the", "fibroblast", "growth", "factor", "receptor", "3", "(FGFR3)", "gene.", "We", "have", "developed", "a", "sensitive", "single", "tube", "tetra-primer", "PCR", "assay", "to", "detect", "both", "the", "c.1138G>A", " ", "and", "c.1138G>C", " ", "mutations", "and", "can", "successfully", "distinguish", "DNA", "samples", "that", "are", "homozygous", "and", "heterozygous", "for", "the", "c.1138G>A", " ", "mutation.", "Titration", "studies", "showed", "that", "the", "assay", "could", "reliably", "detect", "one", "copy", "of", "the", "mutant", "allele", "in", "a", "mix", "of", "100", "wild-type", "alleles.", "The", "assay", "has", "been", "tested", "in", "50", "healthy", "controls,", "3", "known", "patients", "with", "achondroplasia,", "and", "5", "amniotic", "fluids", "suspected", "of", "having", "achondroplasia", "and", "for", "whom", "we", "had", "previously", "determined", "the", "genotypes", "for", "the", "c.1138G>A", " ", "mutation", "by", "PCR-RFLP.", "We", "have", "observed", "complete", "concordance", "between", "methods.", "Our", "tetra-primer", "PCR", "assay", "is", "sensitive,", "low-cost,", "and", "easy", "to", "use", "method", "for", "FGFR3", "p.G380R", " ", "genotyping,", "which", "could", "be", "used", "even", "in", "\"low-tech\"", "laboratories." ]
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Achondroplasia is the most common form of dwarfism and has an incidence of approximately 1/7500. In more than 98% of cases, the disease is associated with a G to A or G to C substitution at nucleotide position 1138 ( p.G380R ) of the fibroblast growth factor receptor 3 (FGFR3) gene. We have developed a sensitive single tube tetra-primer PCR assay to detect both the c.1138G>A and c.1138G>C mutations and can successfully distinguish DNA samples that are homozygous and heterozygous for the c.1138G>A mutation. Titration studies showed that the assay could reliably detect one copy of the mutant allele in a mix of 100 wild-type alleles. The assay has been tested in 50 healthy controls, 3 known patients with achondroplasia, and 5 amniotic fluids suspected of having achondroplasia and for whom we had previously determined the genotypes for the c.1138G>A mutation by PCR-RFLP. We have observed complete concordance between methods. Our tetra-primer PCR assay is sensitive, low-cost, and easy to use method for FGFR3 p.G380R genotyping, which could be used even in "low-tech" laboratories.
16130093
[ "In", "this", "study,", "we", "characterized", "five", "Ullrich", "scleroatonic", "muscular", "dystrophy", "patients", "(two", "Italians,", "one", "Belgian,", "and", "two", "Turks)", "with", "a", "clinical", "phenotype", "showing", "different", "degrees", "of", "severity,", "all", "carrying", "mutations", "localized", "in", "COL6A1.", "We", "sequenced", "the", "three", "entire", "COL6", "complementary", "DNA.", "Three", "of", "five", "patients", "have", "recessive", "mutations:", "two", "patients", "(P1and", "P3)", "have", "homozygous", "single-nucleotide", "deletions,", "one", "in", "exon", "9", "and", "one", "in", "exon", "22;", "one", "patient", "(P2)", "has", "a", "homozygous", "single-nucleotide", "substitution", "leading", "to", "a", "premature", "termination", "codon", "in", "exon", "31.", "The", "nonsense", "mutation", "of", "P2", "also", "causes", "a", "partial", "skipping", "of", "exon", "31", "with", "the", "formation", "of", "a", "premature", "termination", "codon", "in", "exon", "32", "in", "15%", "of", "the", "total", "COL6A1", "messenger", "RNA.", "The", "remaining", "two", "patients", "carry", "a", "heterozygous", "glycine", "substitution", "in", "exons", "9", "and", "10", "inside", "the", "triple-helix", "region;", "both", "are", "dominant", "mutations", "because", "the", "missense", "mutations", "are", "absent", "in", "the", "DNA", "of", "their", "respective", "parents.", "As", "for", "the", "three", "homozygous", "recessive", "mutations,", "the", "apparently", "healthy", "consanguineous", "parents", "all", "carry", "a", "heterozygous", "mutated", "allele.", "Here,", "for", "the", "first", "time,", "we", "report", "a", "genotype-phenotype", "correlation", "demonstrating", "that", "heterozygous", "glycine", "substitutions", "in", "the", "triple-helix", "domain", "of", "COL6A1", "are", "dominant", "and", "responsible", "for", "a", "milder", "Ullrich", "scleroatonic", "muscular", "dystrophy", "phenotype,", "and", "that", "recessive", "mutations", "in", "COL6A1", "correlate", "with", "more", "severe", "clinical", "and", "biochemical", "Ullrich", "scleroatonic", "muscular", "dystrophy", "phenotypes." ]
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In this study, we characterized five Ullrich scleroatonic muscular dystrophy patients (two Italians, one Belgian, and two Turks) with a clinical phenotype showing different degrees of severity, all carrying mutations localized in COL6A1. We sequenced the three entire COL6 complementary DNA. Three of five patients have recessive mutations: two patients (P1and P3) have homozygous single-nucleotide deletions, one in exon 9 and one in exon 22; one patient (P2) has a homozygous single-nucleotide substitution leading to a premature termination codon in exon 31. The nonsense mutation of P2 also causes a partial skipping of exon 31 with the formation of a premature termination codon in exon 32 in 15% of the total COL6A1 messenger RNA. The remaining two patients carry a heterozygous glycine substitution in exons 9 and 10 inside the triple-helix region; both are dominant mutations because the missense mutations are absent in the DNA of their respective parents. As for the three homozygous recessive mutations, the apparently healthy consanguineous parents all carry a heterozygous mutated allele. Here, for the first time, we report a genotype-phenotype correlation demonstrating that heterozygous glycine substitutions in the triple-helix domain of COL6A1 are dominant and responsible for a milder Ullrich scleroatonic muscular dystrophy phenotype, and that recessive mutations in COL6A1 correlate with more severe clinical and biochemical Ullrich scleroatonic muscular dystrophy phenotypes.
18704161
[ "There", "is", "much", "interest", "in", "characterizing", "the", "variation", "in", "a", "human", "individual,", "because", "this", "may", "elucidate", "what", "contributes", "significantly", "to", "a", "person's", "phenotype,", "thereby", "enabling", "personalized", "genomics.", "We", "focus", "here", "on", "the", "variants", "in", "a", "person's", "'exome,'", "which", "is", "the", "set", "of", "exons", "in", "a", "genome,", "because", "the", "exome", "is", "believed", "to", "harbor", "much", "of", "the", "functional", "variation.", "We", "provide", "an", "analysis", "of", "the", "approximately", "12,500", "variants", "that", "affect", "the", "protein", "coding", "portion", "of", "an", "individual's", "genome.", "We", "identified", "approximately", "10,400", "nonsynonymous", "single", "nucleotide", "polymorphisms", "(nsSNPs)", "in", "this", "individual,", "of", "which", "approximately", "15-20%", "are", "rare", "in", "the", "human", "population.", "We", "predict", "approximately", "1,500", "nsSNPs", "affect", "protein", "function", "and", "these", "tend", "be", "heterozygous,", "rare,", "or", "novel.", "Of", "the", "approximately", "700", "coding", "indels,", "approximately", "half", "tend", "to", "have", "lengths", "that", "are", "a", "multiple", "of", "three,", "which", "causes", "insertions/deletions", "of", "amino", "acids", "in", "the", "corresponding", "protein,", "rather", "than", "introducing", "frameshifts.", "Coding", "indels", "also", "occur", "frequently", "at", "the", "termini", "of", "genes,", "so", "even", "if", "an", "indel", "causes", "a", "frameshift,", "an", "alternative", "start", "or", "stop", "site", "in", "the", "gene", "can", "still", "be", "used", "to", "make", "a", "functional", "protein.", "In", "summary,", "we", "reduced", "the", "set", "of", "approximately", "12,500", "nonsilent", "coding", "variants", "by", "approximately", "8-fold", "to", "a", "set", "of", "variants", "that", "are", "most", "likely", "to", "have", "major", "effects", "on", "their", "proteins'", "functions.", "This", "is", "our", "first", "glimpse", "of", "an", "individual's", "exome", "and", "a", "snapshot", "of", "the", "current", "state", "of", "personalized", "genomics.", "The", "majority", "of", "coding", "variants", "in", "this", "individual", "are", "common", "and", "appear", "to", "be", "functionally", "neutral.", "Our", "results", "also", "indicate", "that", "some", "variants", "can", "be", "used", "to", "improve", "the", "current", "NCBI", "human", "reference", "genome.", "As", "more", "genomes", "are", "sequenced,", "many", "rare", "variants", "and", "non-SNP", "variants", "will", "be", "discovered.", "We", "present", "an", "approach", "to", "analyze", "the", "coding", "variation", "in", "humans", "by", "proposing", "multiple", "bioinformatic", "methods", "to", "hone", "in", "on", "possible", "functional", "variation." ]
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There is much interest in characterizing the variation in a human individual, because this may elucidate what contributes significantly to a person's phenotype, thereby enabling personalized genomics. We focus here on the variants in a person's 'exome,' which is the set of exons in a genome, because the exome is believed to harbor much of the functional variation. We provide an analysis of the approximately 12,500 variants that affect the protein coding portion of an individual's genome. We identified approximately 10,400 nonsynonymous single nucleotide polymorphisms (nsSNPs) in this individual, of which approximately 15-20% are rare in the human population. We predict approximately 1,500 nsSNPs affect protein function and these tend be heterozygous, rare, or novel. Of the approximately 700 coding indels, approximately half tend to have lengths that are a multiple of three, which causes insertions/deletions of amino acids in the corresponding protein, rather than introducing frameshifts. Coding indels also occur frequently at the termini of genes, so even if an indel causes a frameshift, an alternative start or stop site in the gene can still be used to make a functional protein. In summary, we reduced the set of approximately 12,500 nonsilent coding variants by approximately 8-fold to a set of variants that are most likely to have major effects on their proteins' functions. This is our first glimpse of an individual's exome and a snapshot of the current state of personalized genomics. The majority of coding variants in this individual are common and appear to be functionally neutral. Our results also indicate that some variants can be used to improve the current NCBI human reference genome. As more genomes are sequenced, many rare variants and non-SNP variants will be discovered. We present an approach to analyze the coding variation in humans by proposing multiple bioinformatic methods to hone in on possible functional variation.
20693575
[ "cAMP", "sensitivity", "of", "HCN", "pacemaker", "channels", "determines", "basal", "heart", "rate", "but", "is", "not", "critical", "for", "autonomic", "rate", "control." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
cAMP sensitivity of HCN pacemaker channels determines basal heart rate but is not critical for autonomic rate control.
15528217
[ "Matrix", "metalloproteinases", "(MMPs)", "are", "proteolytic", "enzymes", "that", "regulate", "various", "cell", "behaviors", "in", "cancer", "biology,", "via", "their", "basic", "function", "of", "degradation", "of", "proteins.", "Genetic", "variations", "in", "several", "MMP", "promoters", "may", "influence", "transcription", "and", "expression", "of", "MMPs.", "The", "aim", "of", "this", "study", "is", "to", "assess", "the", "effects", "of", "the", "two", "single", "nucleotide", "polymorphisms", "(SNPs),", "the", "guanine", "insertion", "polymorphism", "in", "the", "MMP1", "promoter", "and", "the", "adenosine", "insertion", "polymorphism", "in", "the", "MMP3", "promoter,", "on", "risk", "of", "the", "development", "and", "lymphatic", "metastasis", "of", "non-small", "cell", "lung", "carcinoma", "(NSCLC).", "The", "MMP1", "and", "MMP3", "SNPs", "were", "genotyped", "by", "polymerase", "chain", "reaction-restriction", "fragment", "length", "polymorphism", "(PCR-RFLP)", "analysis", "in", "243", "NSCLC", "patients", "and", "350", "control", "subjects", "in", "North", "China.", "The", "overall", "genotype", "and", "allelotype", "distribution", "of", "both", "the", "variants", "in", "cancer", "patients", "and", "controls", "was", "not", "significantly", "different", "(all", "P", "values", "are", "above", "0.05).", "However,", "stratification", "analysis", "showed", "that", "smoking", "individuals", "with", "the", "MMP3", "5A", "allele", "had", "a", ">1.5-fold", "increased", "risk", "to", "develop", "NSCLC,", "compared", "with", "those", "harboring", "the", "6A", "homozygous", "[the", "age", "and", "gender", "adjusted", "odds", "ratio", "(OR)", "=", "1.68,", "95%", "confidence", "interval", "(CI)", "=", "1.04-2.70].", "In", "addition,", "the", "frequency", "of", "the", "MMP3", "5A", "homozygote", "in", "NSCLC", "patients", "with", "lymphatic", "metastasis", "was", "significantly", "higher", "than", "that", "in", "lymph", "node", "negative", "ones", "(5.7", "versus", "0%,", "P", "=", "0.04).", "Moreover,", "the", "MMP", "1G/5A", "haplotype", "significantly", "increased", "the", "risk", "of", "lymphatic", "metastasis", "(OR", "=", "3.36,", "95%", "CI", "=", "1.42-7.94),", "compared", "with", "the", "2G/6A", "haplotype.", "The", "present", "result", "suggested", "that", "the", "MMP3", "promoter", "polymorphism", "may", "modify", "susceptibility", "to", "NSCLC,", "and", "the", "MMP", "1G/5A", "haplotype", "may", "predicate", "the", "risk", "of", "lymphatic", "metastasis", "of", "this", "tumor." ]
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Matrix metalloproteinases (MMPs) are proteolytic enzymes that regulate various cell behaviors in cancer biology, via their basic function of degradation of proteins. Genetic variations in several MMP promoters may influence transcription and expression of MMPs. The aim of this study is to assess the effects of the two single nucleotide polymorphisms (SNPs), the guanine insertion polymorphism in the MMP1 promoter and the adenosine insertion polymorphism in the MMP3 promoter, on risk of the development and lymphatic metastasis of non-small cell lung carcinoma (NSCLC). The MMP1 and MMP3 SNPs were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 243 NSCLC patients and 350 control subjects in North China. The overall genotype and allelotype distribution of both the variants in cancer patients and controls was not significantly different (all P values are above 0.05). However, stratification analysis showed that smoking individuals with the MMP3 5A allele had a >1.5-fold increased risk to develop NSCLC, compared with those harboring the 6A homozygous [the age and gender adjusted odds ratio (OR) = 1.68, 95% confidence interval (CI) = 1.04-2.70]. In addition, the frequency of the MMP3 5A homozygote in NSCLC patients with lymphatic metastasis was significantly higher than that in lymph node negative ones (5.7 versus 0%, P = 0.04). Moreover, the MMP 1G/5A haplotype significantly increased the risk of lymphatic metastasis (OR = 3.36, 95% CI = 1.42-7.94), compared with the 2G/6A haplotype. The present result suggested that the MMP3 promoter polymorphism may modify susceptibility to NSCLC, and the MMP 1G/5A haplotype may predicate the risk of lymphatic metastasis of this tumor.
15459183
[ "We", "previously", "reported", "association", "of", "FCGR2B-", "Ile232Thr", " ", "with", "systemic", "lupus", "erythematosus", "(SLE)", "in", "three", "Asian", "populations.", "Because", "polymorphism", "of", "CD72,", "another", "inhibitory", "receptor", "of", "B", "cells,", "was", "associated", "with", "murine", "SLE,", "we", "identified", "human", "CD72", "polymorphisms,", "tested", "their", "association", "with", "SLE", "and", "examined", "genetic", "interaction", "with", "FCGR2B", "in", "the", "Japanese", "(160", "SLE,", "277", "controls),", "Thais", "(87", "SLE,", "187", "controls)", "and", "Caucasians", "(94", "families", "containing", "SLE", "members).", "Four", "polymorphisms", "and", "six", "rare", "variations", "were", "detected.", "The", "former", "constituted", "two", "major", "haplotypes", "that", "contained", "one", "or", "two", "repeats", "of", "13", "nucleotides", "in", "intron", "8", "(designated", "as", "*1", "and", "*2,", "respectively).", "Although", "association", "with", "susceptibility", "to", "SLE", "was", "not", "detected,", "the", "*1", "allele", "was", "significantly", "associated", "with", "nephritis", "among", "the", "Japanese", "patients", "(P=0.024).", "RT-PCR", "identified", "a", "novel", "alternatively", "spliced", "(AS)", "transcript", "that", "was", "expressed", "at", "the", "protein", "level", "in", "COS-7", "transfectants.", "The", "ratio", "of", "AS/common", "isoforms", "was", "strikingly", "increased", "in", "individuals", "with", "*2/*2", "genotype", "when", "compared", "with", "*1/*1", "(P=0.000038)", "or", "*1/*2", "(P=0.0085)", "genotypes.", "Using", "the", "two", "Asian", "cohorts,", "significant", "association", "of", "FCGR2B-232Thr/Thr", "with", "SLE", "was", "observed", "only", "in", "the", "presence", "of", "CD72-*1/*1", "genotype", "(OR", "4.63,", "95%", "CI", "1.47-14.6,", "P=0.009", "versus", "FCGR2B-232Ile/Ile", "plus", "CD72-*2/*2).", "Minigene", "assays", "demonstrated", "that", "the", "13-nucleotide", "repeat", "and", "4", "bp", "deletion", "within", "the", "same", "haplotype", "of", "intron", "8", "could", "regulate", "alternative", "splicing.", "The", "AS", "isoform", "lacks", "exon", "8,", "and", "is", "deduced", "to", "contain", "49", "amino", "acid", "changes", "in", "the", "membrane-distal", "portion", "of", "the", "extracellular", "domain,", "where", "considerable", "amino", "acid", "changes", "are", "known", "in", "CD72(c)", "allele", "associated", "with", "murine", "SLE.", "These", "results", "indicated", "that", "the", "presence", "of", "CD72-*2", "allele", "decreases", "risk", "for", "human", "SLE", "conferred", "by", "FCGR2B-232Thr,", "possibly", "by", "increasing", "the", "AS", "isoform", "of", "CD72." ]
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We previously reported association of FCGR2B- Ile232Thr with systemic lupus erythematosus (SLE) in three Asian populations. Because polymorphism of CD72, another inhibitory receptor of B cells, was associated with murine SLE, we identified human CD72 polymorphisms, tested their association with SLE and examined genetic interaction with FCGR2B in the Japanese (160 SLE, 277 controls), Thais (87 SLE, 187 controls) and Caucasians (94 families containing SLE members). Four polymorphisms and six rare variations were detected. The former constituted two major haplotypes that contained one or two repeats of 13 nucleotides in intron 8 (designated as *1 and *2, respectively). Although association with susceptibility to SLE was not detected, the *1 allele was significantly associated with nephritis among the Japanese patients (P=0.024). RT-PCR identified a novel alternatively spliced (AS) transcript that was expressed at the protein level in COS-7 transfectants. The ratio of AS/common isoforms was strikingly increased in individuals with *2/*2 genotype when compared with *1/*1 (P=0.000038) or *1/*2 (P=0.0085) genotypes. Using the two Asian cohorts, significant association of FCGR2B-232Thr/Thr with SLE was observed only in the presence of CD72-*1/*1 genotype (OR 4.63, 95% CI 1.47-14.6, P=0.009 versus FCGR2B-232Ile/Ile plus CD72-*2/*2). Minigene assays demonstrated that the 13-nucleotide repeat and 4 bp deletion within the same haplotype of intron 8 could regulate alternative splicing. The AS isoform lacks exon 8, and is deduced to contain 49 amino acid changes in the membrane-distal portion of the extracellular domain, where considerable amino acid changes are known in CD72(c) allele associated with murine SLE. These results indicated that the presence of CD72-*2 allele decreases risk for human SLE conferred by FCGR2B-232Thr, possibly by increasing the AS isoform of CD72.
17426470
[ "3'", "Mutation", "of", "the", "APC", "gene", "and", "family", "history", "of", "FAP", "in", "a", "patient", "with", "apparently", "sporadic", "desmoid", "tumors." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
3' Mutation of the APC gene and family history of FAP in a patient with apparently sporadic desmoid tumors.
22174939
[ "Rare", "(RVs)", "and", "common", "variants", "of", "the", "RET", "gene", "contribute", "to", "Hirschsprung", "disease", "(HSCR;", "congenital", "aganglionosis).", "While", "RET", "common", "variants", "are", "strongly", "associated", "with", "the", "commonest", "manifestation", "of", "the", "disease", "(males;", "short-segment", "aganglionosis;", "sporadic),", "rare", "coding", "sequence", "(CDS)", "variants", "are", "more", "frequently", "found", "in", "the", "lesser", "common", "and", "more", "severe", "forms", "of", "the", "disease", "(females;", "long/total", "colonic", "aganglionosis;", "familial).Here", "we", "present", "the", "screening", "for", "RVs", "in", "the", "RET", "CDS", "and", "intron/exon", "boundaries", "of", "601", "Chinese", "HSCR", "patients,", "the", "largest", "number", "of", "patients", "ever", "reported.", "We", "identified", "61", "different", "heterozygous", "RVs", "(50", "novel)", "distributed", "among", "100", "patients", "(16.64%).", "Those", "include", "14", "silent,", "29", "missense,", "5", "nonsense,", "4", "frame-shifts,", "and", "one", "in-frame", "amino-acid", "deletion", "in", "the", "CDS,", "two", "splice-site", "deletions,", "4", "nucleotide", "substitutions", "and", "a", "22-bp", "deletion", "in", "the", "intron/exon", "boundaries", "and", "1", "single-nucleotide", "substitution", "in", "the", "5'", "untranslated", "region.", "Exonic", "variants", "were", "mainly", "clustered", "in", "RET", "the", "extracellular", "domain.", "RET", "RVs", "were", "more", "frequent", "among", "patients", "with", "the", "most", "severe", "phenotype", "(24%", "vs.", "15%", "in", "short-HSCR).", "Phasing", "RVs", "with", "the", "RET", "HSCR-associated", "haplotype", "suggests", "that", "RVs", "do", "not", "underlie", "the", "undisputable", "association", "of", "RET", "common", "variants", "with", "HSCR.", "None", "of", "the", "variants", "were", "found", "in", "250", "Chinese", "controls." ]
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Rare (RVs) and common variants of the RET gene contribute to Hirschsprung disease (HSCR; congenital aganglionosis). While RET common variants are strongly associated with the commonest manifestation of the disease (males; short-segment aganglionosis; sporadic), rare coding sequence (CDS) variants are more frequently found in the lesser common and more severe forms of the disease (females; long/total colonic aganglionosis; familial).Here we present the screening for RVs in the RET CDS and intron/exon boundaries of 601 Chinese HSCR patients, the largest number of patients ever reported. We identified 61 different heterozygous RVs (50 novel) distributed among 100 patients (16.64%). Those include 14 silent, 29 missense, 5 nonsense, 4 frame-shifts, and one in-frame amino-acid deletion in the CDS, two splice-site deletions, 4 nucleotide substitutions and a 22-bp deletion in the intron/exon boundaries and 1 single-nucleotide substitution in the 5' untranslated region. Exonic variants were mainly clustered in RET the extracellular domain. RET RVs were more frequent among patients with the most severe phenotype (24% vs. 15% in short-HSCR). Phasing RVs with the RET HSCR-associated haplotype suggests that RVs do not underlie the undisputable association of RET common variants with HSCR. None of the variants were found in 250 Chinese controls.
12668609
[ "Haplotypes", "extending", "across", "ACE", "are", "associated", "with", "Alzheimer's", "disease." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Haplotypes extending across ACE are associated with Alzheimer's disease.
19444361
[]
[]
15770126
[]
[]
18398821
[ "Genome-wide", "analysis", "identifies", "16q", "deletion", "associated", "with", "survival,", "molecular", "subtypes,", "mRNA", "expression,", "and", "germline", "haplotypes", "in", "breast", "cancer", "patients." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Genome-wide analysis identifies 16q deletion associated with survival, molecular subtypes, mRNA expression, and germline haplotypes in breast cancer patients.
18806880
[ "Genetics", "of", "Meesmann", "corneal", "dystrophy:", "a", "novel", "mutation", "in", "the", "keratin", "3", "gene", "in", "an", "asymptomatic", "family", "suggests", "genotype-phenotype", "correlation." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Genetics of Meesmann corneal dystrophy: a novel mutation in the keratin 3 gene in an asymptomatic family suggests genotype-phenotype correlation.
20143913
[ "Large", "deletion", "involving", "exon", "5", "of", "the", "arylsulfatase", "B", "gene", "caused", "apparent", "homozygosity", "in", "a", "mucopolysaccharidosis", "type", "VI", "patient." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Large deletion involving exon 5 of the arylsulfatase B gene caused apparent homozygosity in a mucopolysaccharidosis type VI patient.
18791947
[ "More", "than", "20", "DNA", "mutations", "with", "different", "inheritance", "pattern", "have", "been", "described", "in", "patients", "with", "Bernard-Soulier", "Syndrome", "(BSS),", "leading", "to", "abnormal", "or", "absent", "synthesis", "and/or", "expression", "of", "GPIbalpha.", "Clinical", "phenotype", "shows", "considerable", "variation", "between", "individuals,", "such", "as", "bleeding,", "platelet", "count", "and", "the", "percentage", "of", "large", "platelets.", "We", "describe", "in", "a", "BSS", "patient", "the", "first", "case", "of", "homozygous", "four", "bases", "deletion", "(TGAG)", "in", "the", "gpIbalpha", "gene", "coding", "sequence,", "leading", "to", "a", "premature", "stop", "codon.", "In", "the", "propositus,", "blood", "smears", "revealed", "giant", "platelets", "(30", "x", "10(9)", "platelets/L),", "and", "platelet", "agglutination", "to", "ristocetin", "was", "absent.", "Propositus'", "parents", "are", "consanguineous.", "His", "father", "and", "paternal", "grandmother", "showed", "a", "mild", "thrombocytopenia", "(108", "x", "10(9)/L", "and", "120", "x", "10(9)/L", "platelets", "respectively)", "while", "mothers", "and", "sister's", "referred", "normal", "platelet", "counts.", "The", "surface", "expression", "of", "GPIbalpha", "was", "practically", "undetectable", "by", "flow-cytometry", "and", "western", "blot", "in", "the", "patient", "and", "was", "reduced", "in", "the", "father.", "Proband's", "DNA", "analysis", "revealed", "a", "homozygous", "four-base-pair", "deletion", "(TGAG),", "starting", "from", "the", "last", "base", "of", "the", "codon", "for", "Ser39,", "leading", "to", "a", "coding", "frame", "shift", "with", "a", "new", "termination", "codon", "after", "11", "novel", "amino", "acids.", "The", "same", "mutation", "was", "seen", "in", "heterozygosis", "in", "both", "parents.", "This", "is", "the", "first", "report", "of", "GPIbalpha", "TGAG", "deletion", "in", "homozygous", "state", "even", "if", "the", "defect", "has", "already", "been", "described", "in", "a", "case", "of", "compound", "heterozygosis.", "Surprisingly,", "the", "propositus", "does", "not", "report", "any", "spontaneous", "bleeding", "tendency." ]
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More than 20 DNA mutations with different inheritance pattern have been described in patients with Bernard-Soulier Syndrome (BSS), leading to abnormal or absent synthesis and/or expression of GPIbalpha. Clinical phenotype shows considerable variation between individuals, such as bleeding, platelet count and the percentage of large platelets. We describe in a BSS patient the first case of homozygous four bases deletion (TGAG) in the gpIbalpha gene coding sequence, leading to a premature stop codon. In the propositus, blood smears revealed giant platelets (30 x 10(9) platelets/L), and platelet agglutination to ristocetin was absent. Propositus' parents are consanguineous. His father and paternal grandmother showed a mild thrombocytopenia (108 x 10(9)/L and 120 x 10(9)/L platelets respectively) while mothers and sister's referred normal platelet counts. The surface expression of GPIbalpha was practically undetectable by flow-cytometry and western blot in the patient and was reduced in the father. Proband's DNA analysis revealed a homozygous four-base-pair deletion (TGAG), starting from the last base of the codon for Ser39, leading to a coding frame shift with a new termination codon after 11 novel amino acids. The same mutation was seen in heterozygosis in both parents. This is the first report of GPIbalpha TGAG deletion in homozygous state even if the defect has already been described in a case of compound heterozygosis. Surprisingly, the propositus does not report any spontaneous bleeding tendency.
20534762
[ "CONTEXT:", "Patients", "with", "TSH-beta", "subunit", "defects", "and", "congenital", "hypothyroidism", "are", "missed", "by", "TSH-based", "neonatal", "screening.", "OBJECTIVE:", "Our", "objective", "was", "to", "report", "the", "molecular", "consequences", "of", "a", "novel", "splice-junction", "mutation", "and", "a", "novel", "missense", "mutation", "in", "the", "TSH-beta", "subunit", "gene", "found", "in", "two", "patients", "with", "congenital", "central", "hypothyroidism", "and", "conventional", "treatment-resistant", "anemia.", "RESULTS:", "Patient", "1", "had", "a", "homozygous", "G", "to", "A", "nucleotide", "change", "at", "the", "5'", "donor", "splice", "site", "of", "exon/intron", "2.", "This", "resulted", "in", "a", "silent", "change", "at", "codon", "34", "of", "the", "mature", "protein.", "In", "vitro", "splicing", "assays", "showed", "that", "the", "mutant", "minigene", "dramatically", "affected", "pre-mRNA", "processing,", "causing", "exon", "2", "to", "be", "completely", "skipped.", "The", "putative", "product", "from", "a", "new", "out-of-frame", "translational", "start", "point", "in", "exon", "3", "is", "expected", "to", "yield", "a", "nonsense", "25-amino-acid", "peptide.", "In", "patient", "2,", "sequence", "analysis", "revealed", "a", "compound", "heterozygosis", "for", "the", "already", "reported", "313delT", " ", "(", "C105Vfs114X", ")", "mutation", "and", "for", "a", "second", "novel", "mutation", "in", "exon", "3,", "substituting", "G", "for", "A", "at", "cDNA", "nucleotide", "position", "323,", "resulting", "in", "a", "C88Y", " ", "change.", "This", "cysteine", "residue", "is", "conserved", "among", "all", "dimeric", "pituitary", "and", "placental", "glycoprotein", "hormone-beta", "subunits.", "Data", "from", "in", "silico", "analysis", "confirmed", "that", "the", "C88Y", " ", "mutation", "would", "affect", "subunit", "conformation.", "Indeed,", "two", "different", "bioinformatics", "approaches,", "PolyPhen", "and", "SIFT", "analysis,", "predicted", "C88Y", " ", "to", "be", "a", "damaging", "substitution.", "CONCLUSIONS:", "In", "isolated", "TSH", "deficiency,", "the", "exact", "molecular", "diagnosis", "is", "mandatory", "for", "diagnosis", "of", "isolated", "pituitary", "deficiency,", "delineation", "of", "prognosis,", "and", "genetic", "counseling.", "Moreover,", "diagnosis", "of", "central", "hypothyroidism", "should", "be", "considered", "in", "the", "face", "of", "severe", "infant", "anemia", "of", "uncertain", "etiology." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
CONTEXT: Patients with TSH-beta subunit defects and congenital hypothyroidism are missed by TSH-based neonatal screening. OBJECTIVE: Our objective was to report the molecular consequences of a novel splice-junction mutation and a novel missense mutation in the TSH-beta subunit gene found in two patients with congenital central hypothyroidism and conventional treatment-resistant anemia. RESULTS: Patient 1 had a homozygous G to A nucleotide change at the 5' donor splice site of exon/intron 2. This resulted in a silent change at codon 34 of the mature protein. In vitro splicing assays showed that the mutant minigene dramatically affected pre-mRNA processing, causing exon 2 to be completely skipped. The putative product from a new out-of-frame translational start point in exon 3 is expected to yield a nonsense 25-amino-acid peptide. In patient 2, sequence analysis revealed a compound heterozygosis for the already reported 313delT ( C105Vfs114X ) mutation and for a second novel mutation in exon 3, substituting G for A at cDNA nucleotide position 323, resulting in a C88Y change. This cysteine residue is conserved among all dimeric pituitary and placental glycoprotein hormone-beta subunits. Data from in silico analysis confirmed that the C88Y mutation would affect subunit conformation. Indeed, two different bioinformatics approaches, PolyPhen and SIFT analysis, predicted C88Y to be a damaging substitution. CONCLUSIONS: In isolated TSH deficiency, the exact molecular diagnosis is mandatory for diagnosis of isolated pituitary deficiency, delineation of prognosis, and genetic counseling. Moreover, diagnosis of central hypothyroidism should be considered in the face of severe infant anemia of uncertain etiology.
21699520
[ "PTCH1", "gene", "mutations", "in", "exon", "17", "and", "loss", "of", "heterozygosity", "on", "D9S180", "microsatellite", "in", "sporadic", "and", "inherited", "human", "basal", "cell", "carcinomas." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
PTCH1 gene mutations in exon 17 and loss of heterozygosity on D9S180 microsatellite in sporadic and inherited human basal cell carcinomas.
21779184
[ "Detection", "of", "a-thalassemia-1", "Southeast", "Asian", "and", "Thai", "type", "deletions", "and", "b-thalassemia", "3.5-kb", "deletion", "by", "single-tube", "multiplex", "real-time", "PCR", "with", "SYBR", "Green1", "and", "high-resolution", "melting", "analysis." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Detection of a-thalassemia-1 Southeast Asian and Thai type deletions and b-thalassemia 3.5-kb deletion by single-tube multiplex real-time PCR with SYBR Green1 and high-resolution melting analysis.
19370764
[]
[]
21666969
[ "BACKGROUND:", "A", "intragenic", "biallelic", "polymorphism", "(", "1359", "G/A", ")", "of", "the", "CB1", "gene", "resulting", "in", "the", "substitution", "of", "the", "G", "to", "A", "at", "nucleotide", "position", "1359", "in", "codon", "435", "(Thr),", "was", "reported", "as", "a", "common", "polymorphism", "in", "Caucasian", "populations.", "Intervention", "studies", "with", "this", "polymorphism", "have", "not", "been", "realized.", "OBJECTIVE:", "We", "decided", "to", "investigate", "the", "role", "of", "the", "polymorphism", "(G1359A)", "of", "CB1", "receptor", "gene", "on", "adipocytokines", "response", "and", "weight", "loss", "secondary", "to", "a", "lifestyle", "modification", "(Mediterranean", "hypocaloric", "diet", "and", "exercise)", "in", "obese", "patients.", "DESIGN:", "A", "population", "of", "94", "patients", "with", "obesity", "was", "analyzed.", "Before", "and", "after", "3", "months", "on", "a", "hypocaloric", "diet,", "an", "anthropometric", "evaluation,", "an", "assessment", "of", "nutritional", "intake", "and", "a", "biochemical", "analysis", "were", "performed.", "The", "statistical", "analysis", "was", "performed", "for", "the", "combined", "G1359A", "and", "A1359A", "as", "a", "group", "and", "wild", "type", "G1359G", "as", "second", "group,", "with", "a", "dominant", "model.", "Results:", "Forty", "seven", "patients", "(50%)", "had", "the", "genotype", "G1359G", "(wild", "type", "group)", "and", "47", "(50%)", "patients", "G1359A", "(41", "patients,", "43.6%)", "or", "A1359A", "(6", "patients,", "6.4%)", "(mutant", "type", "group)", "had", "the", "genotype.", "In", "wild", "and", "mutant", "type", "groups,", "weight,", "body", "mass", "index,", "fat", "mass,", "waist", "circumference", "and", "systolic", "blood", "pressure", "decreased.", "In", "mutant", "type", "group,", "resistin", "(4.15", " ", "1.7", "ng/ml", "vs.", "3.90", " ", "2.1", "ng/ml:", "P", "<", "0.05),", "leptin", "(78.4", " ", "69", "ng/ml", "vs", "66.2", " ", "32", "ng/ml:", "P", "<", "0.05)", "and", "IL-6", "(1.40", " ", "1.9", "pg/ml", "vs", "0.81", " ", "1.5", "pg/ml:", "P", "<", "0.05)", "levels", "decreased", "after", "dietary", "treatment.", "CONCLUSION:", "The", "novel", "finding", "of", "this", "study", "is", "the", "association", "of", "the", "mutant", "allele", "(A1359)", "with", "a", "decrease", "of", "resistin,", "leptin", "and", "interleukin-6", "secondary", "to", "weight", "loss." ]
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BACKGROUND: A intragenic biallelic polymorphism ( 1359 G/A ) of the CB1 gene resulting in the substitution of the G to A at nucleotide position 1359 in codon 435 (Thr), was reported as a common polymorphism in Caucasian populations. Intervention studies with this polymorphism have not been realized. OBJECTIVE: We decided to investigate the role of the polymorphism (G1359A) of CB1 receptor gene on adipocytokines response and weight loss secondary to a lifestyle modification (Mediterranean hypocaloric diet and exercise) in obese patients. DESIGN: A population of 94 patients with obesity was analyzed. Before and after 3 months on a hypocaloric diet, an anthropometric evaluation, an assessment of nutritional intake and a biochemical analysis were performed. The statistical analysis was performed for the combined G1359A and A1359A as a group and wild type G1359G as second group, with a dominant model. Results: Forty seven patients (50%) had the genotype G1359G (wild type group) and 47 (50%) patients G1359A (41 patients, 43.6%) or A1359A (6 patients, 6.4%) (mutant type group) had the genotype. In wild and mutant type groups, weight, body mass index, fat mass, waist circumference and systolic blood pressure decreased. In mutant type group, resistin (4.15 1.7 ng/ml vs. 3.90 2.1 ng/ml: P < 0.05), leptin (78.4 69 ng/ml vs 66.2 32 ng/ml: P < 0.05) and IL-6 (1.40 1.9 pg/ml vs 0.81 1.5 pg/ml: P < 0.05) levels decreased after dietary treatment. CONCLUSION: The novel finding of this study is the association of the mutant allele (A1359) with a decrease of resistin, leptin and interleukin-6 secondary to weight loss.
19477219
[ "OBJECTIVE:", "Mantle", "cell", "lymphoma", "(MCL)", "is", "a", "lymphoma", "characterized", "by", "aberrant", "activation", "of", "CCND1/cyclin", "D1", "followed", "by", "sequential", "genetic", "abnormalities.", "Genomic", "abnormalities", "in", "MCL", "have", "been", "extensively", "examined", "by", "classical", "cytogenetics", "and", "microarray-based", "comparative", "genomic", "hybridization", "techniques,", "pointing", "out", "a", "number", "of", "alterations", "in", "genomic", "regions", "that", "correlate", "with", "the", "neoplastic", "phenotype", "and", "survival.", "Recently,", "single", "nucleotide", "polymorphism", "genomic", "microarrays", "(SNP-chip)", "have", "been", "developed", "and", "used", "for", "analysis", "of", "cancer", "genomics.", "This", "technique", "allows", "detection", "of", "genomic", "changes", "with", "higher", "resolution,", "including", "loss", "of", "heterozygosity", "without", "changes", "of", "gene", "dosage,", "so-called", "acquired", "uniparental", "disomy", "(aUPD).", "MATERIALS", "AND", "METHODS:", "We", "have", "examined", "33", "samples", "of", "MCL", "(28", "primary", "MCL", "and", "5", "cell", "lines)", "using", "the", "250,000", "SNP-chip", "from", "Affymetrix.", "RESULTS:", "Known", "alterations", "were", "confirmed", "by", "SNP", "arrays,", "including", "deletion", "of", "INK4A/ARF,", "duplication/amplification", "of", "MYC,", "deletion", "of", "ATM,", "and", "deletion", "of", "TP53.", "We", "also", "identified", "a", "duplication/amplification", "that", "occurred", "at", "13q", "involving", "oncogenic", "microRNA,", "miR17-92.", "We", "found", "other", "genomic", "abnormalities,", "including", "duplication/amplification", "of", "cyclin", "D1,", "del(1p),", "del(6q),", "dup(3q)", "and", "dup(18q).", "Our", "SNP-chip", "analysis", "detected", "these", "abnormalities", "at", "high", "resolution,", "allowing", "us", "to", "narrow", "the", "size", "of", "the", "commonly", "deleted", "regions,", "including", "1p", "and", "6q.", "Our", "SNP-chip", "analysis", "detected", "a", "number", "of", "aUPD", "sites,", "including", "whole", "chromosome", "9", "aUPD", "and", "9p", "aUPD.", "We", "also", "found", "an", "MCL", "case", "with", "19p,", "leading", "to", "homozygous", "deletion", "of", "TNFSF", "genes.", "CONCLUSION:", "SNP-chip", "analysis", "detected", "in", "MCL", "very", "small", "genomic", "gains/losses,", "as", "well", "as", "aUPDs,", "which", "could", "not", "be", "detected", "by", "more", "conventional", "methods." ]
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OBJECTIVE: Mantle cell lymphoma (MCL) is a lymphoma characterized by aberrant activation of CCND1/cyclin D1 followed by sequential genetic abnormalities. Genomic abnormalities in MCL have been extensively examined by classical cytogenetics and microarray-based comparative genomic hybridization techniques, pointing out a number of alterations in genomic regions that correlate with the neoplastic phenotype and survival. Recently, single nucleotide polymorphism genomic microarrays (SNP-chip) have been developed and used for analysis of cancer genomics. This technique allows detection of genomic changes with higher resolution, including loss of heterozygosity without changes of gene dosage, so-called acquired uniparental disomy (aUPD). MATERIALS AND METHODS: We have examined 33 samples of MCL (28 primary MCL and 5 cell lines) using the 250,000 SNP-chip from Affymetrix. RESULTS: Known alterations were confirmed by SNP arrays, including deletion of INK4A/ARF, duplication/amplification of MYC, deletion of ATM, and deletion of TP53. We also identified a duplication/amplification that occurred at 13q involving oncogenic microRNA, miR17-92. We found other genomic abnormalities, including duplication/amplification of cyclin D1, del(1p), del(6q), dup(3q) and dup(18q). Our SNP-chip analysis detected these abnormalities at high resolution, allowing us to narrow the size of the commonly deleted regions, including 1p and 6q. Our SNP-chip analysis detected a number of aUPD sites, including whole chromosome 9 aUPD and 9p aUPD. We also found an MCL case with 19p, leading to homozygous deletion of TNFSF genes. CONCLUSION: SNP-chip analysis detected in MCL very small genomic gains/losses, as well as aUPDs, which could not be detected by more conventional methods.
18813858
[ "Van", "der", "Woude", "Syndrome", "(VWS)", "is", "an", "autosomal", "craniofacial", "disorder", "characterized", "by", "lower", "lip", "pits", "and", "cleft", "lip", "and/or", "palate.", "Mutations", "in", "the", "interferon", "regulatory", "factor", "6", "(IRF6)", "gene", "have", "been", "identified", "in", "patients", "with", "VWS.", "To", "identify", "novel", "IRF6", "mutations", "in", "patients", "affected", "by", "VWS,", "we", "screened", "2", "Brazilian", "families,", "sequencing", "the", "entire", "IRF6-coding", "region", "and", "flanking", "intronic", "boundaries.", "Two", "novel", "heterozygous", "mutations", "were", "identified:", "a", "frame", "shift", "mutation", "with", "deletion", "of", "G", "at", "the", "nucleotide", "position", "520", "in", "the", "exon", "6", "(", "520delG", "),", "and", "a", "missense", "single", "nucleotide", "substitution", "from", "T", "to", "A", "at", "nucleotide", "position", "1135", "in", "exon", "8", "(", "T1135A", ").", "By", "using", "restriction", "enzyme", "analysis,", "we", "were", "able", "to", "demonstrate", "the", "lack", "of", "similar", "mutations", "in", "unrelated", "healthy", "individuals", "and", "non-syndromic", "cleft", "lip", "and", "palate", "patients.", "Our", "results", "further", "confirmed", "that", "haploinsufficiency", "of", "the", "IRF6", "gene", "results", "in", "VWS." ]
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Van der Woude Syndrome (VWS) is an autosomal craniofacial disorder characterized by lower lip pits and cleft lip and/or palate. Mutations in the interferon regulatory factor 6 (IRF6) gene have been identified in patients with VWS. To identify novel IRF6 mutations in patients affected by VWS, we screened 2 Brazilian families, sequencing the entire IRF6-coding region and flanking intronic boundaries. Two novel heterozygous mutations were identified: a frame shift mutation with deletion of G at the nucleotide position 520 in the exon 6 ( 520delG ), and a missense single nucleotide substitution from T to A at nucleotide position 1135 in exon 8 ( T1135A ). By using restriction enzyme analysis, we were able to demonstrate the lack of similar mutations in unrelated healthy individuals and non-syndromic cleft lip and palate patients. Our results further confirmed that haploinsufficiency of the IRF6 gene results in VWS.
16575011
[]
[]
14962306
[]
[]
18272172
[ "Mutations", "in", "the", "human", "ether-a-go-go-related", "gene", "(hERG)", "cause", "type", "2", "long", "QT", "syndrome.", "In", "this", "study,", "we", "investigated", "the", "pathogenic", "mechanism", "of", "the", "hERG", "splice", "site", "mutation", "2398+1G>C", " ", "and", "the", "genotype-phenotype", "relationship", "of", "mutation", "carriers", "in", "three", "unrelated", "kindreds", "with", "long", "QT", "syndrome.", "The", "effect", "of", "2398+1G>C", " ", "on", "mRNA", "splicing", "was", "studied", "by", "analysis", "of", "RNA", "isolated", "from", "lymphocytes", "of", "index", "patients", "and", "using", "minigenes", "expressed", "in", "HEK293", "cells", "and", "neonatal", "rat", "ventricular", "myocytes.", "RT-PCR", "analysis", "revealed", "that", "the", "2398+1G>C", " ", "mutation", "disrupted", "the", "normal", "splicing", "and", "activated", "a", "cryptic", "splice", "donor", "site", "in", "intron", "9,", "leading", "to", "the", "inclusion", "of", "54", "nt", "of", "the", "intron", "9", "sequence", "in", "hERG", "mRNA.", "The", "cryptic", "splicing", "resulted", "in", "an", "in-frame", "insertion", "of", "18", "amino", "acids", "in", "the", "middle", "of", "the", "cyclic", "nucleotide", "binding", "domain.", "In", "patch", "clamp", "experiments", "the", "splice", "mutant", "did", "not", "generate", "hERG", "current.", "Western", "blot", "and", "immunostaining", "studies", "showed", "that", "the", "mutant", "expressed", "an", "immature", "form", "of", "hERG", "protein", "that", "failed", "to", "reach", "the", "plasma", "membrane.", "Coexpression", "of", "the", "mutant", "and", "wild-type", "channels", "led", "to", "a", "dominant", "negative", "suppression", "of", "wild-type", "channel", "function", "by", "intracellular", "retention", "of", "heteromeric", "channels.", "Our", "results", "demonstrate", "that", "2398+1G>C", " ", "activates", "a", "cryptic", "site", "and", "generates", "a", "full-length", "hERG", "protein", "with", "an", "insertion", "of", "18", "amino", "acids,", "which", "leads", "to", "a", "trafficking", "defect", "of", "the", "mutant", "channel." ]
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Mutations in the human ether-a-go-go-related gene (hERG) cause type 2 long QT syndrome. In this study, we investigated the pathogenic mechanism of the hERG splice site mutation 2398+1G>C and the genotype-phenotype relationship of mutation carriers in three unrelated kindreds with long QT syndrome. The effect of 2398+1G>C on mRNA splicing was studied by analysis of RNA isolated from lymphocytes of index patients and using minigenes expressed in HEK293 cells and neonatal rat ventricular myocytes. RT-PCR analysis revealed that the 2398+1G>C mutation disrupted the normal splicing and activated a cryptic splice donor site in intron 9, leading to the inclusion of 54 nt of the intron 9 sequence in hERG mRNA. The cryptic splicing resulted in an in-frame insertion of 18 amino acids in the middle of the cyclic nucleotide binding domain. In patch clamp experiments the splice mutant did not generate hERG current. Western blot and immunostaining studies showed that the mutant expressed an immature form of hERG protein that failed to reach the plasma membrane. Coexpression of the mutant and wild-type channels led to a dominant negative suppression of wild-type channel function by intracellular retention of heteromeric channels. Our results demonstrate that 2398+1G>C activates a cryptic site and generates a full-length hERG protein with an insertion of 18 amino acids, which leads to a trafficking defect of the mutant channel.
14979495
[ "The", "Arg753GLn", " ", "polymorphism", "of", "the", "human", "toll-like", "receptor", "2", "gene", "in", "tuberculosis", "disease." ]
[ 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
The Arg753GLn polymorphism of the human toll-like receptor 2 gene in tuberculosis disease.
21130517
[]
[]
22337303
[]
[]
16277682
[]
[]
15258261
[ "Mre11", "deficiency", "in", "Arabidopsis", "is", "associated", "with", "chromosomal", "instability", "in", "somatic", "cells", "and", "Spo11-dependent", "genome", "fragmentation", "during", "meiosis." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Mre11 deficiency in Arabidopsis is associated with chromosomal instability in somatic cells and Spo11-dependent genome fragmentation during meiosis.
21542403
[ "Chasing", "the", "ubiquitous", "RET", "proto-oncogene", "in", "South", "African", "MEN2", "families--implications", "for", "the", "surgeon." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Chasing the ubiquitous RET proto-oncogene in South African MEN2 families--implications for the surgeon.
20843112
[ "BACKGROUND", "AND", "AIM:", "The", "focus", "of", "the", "study", "was", "to", "investigate", "the", "frequencies", "of", "homozygous", "deletions", "and", "mutations", "of", "p16", "gene", "in", "gastric", "carcinomas", "in", "the", "Kashmiri", "population.", "METHODS:", "A", "total", "of", "84", "gastric", "carcinoma", "patients", "were", "screened", "by", "the", "single", "strand", "conformation", "polymorphism", "(SSCP)", "technique", "and", "later", "by", "DNA", "sequencing", "to", "detect", "mutations", "of", "the", "p16", "gene.", "Also", "PCR", "was", "applied", "further", "to", "further", "detect", "any", "homozygous", "deletions.", "RESULTS:", "SSCP", "and", "DNA", "sequencing", "performed", "encompassing", "all", "the", "three", "exons", "of", "p16", "gene", "could", "not", "detect", "any", "mutations", "in", "any", "ofl", "84", "cases.", "Though", "we", "could", "observe", "mobility", "shifts", "in", "SSCP", "of", "two", "samples,", "subsequent", "DNA", "sequencing", "did", "not", "show", "any", "mutation.", "Further", "PCR", "could", "not", "detect", "any", "homozygous", "deletion", "in", "P16", "in", "any", "case.", "CONCLUSION:", "Though", "Kashmir", "is", "a", "high", "incidence", "area", "of", "gastric", "carcinomas,", "p16gene", "mutations", "/or", "deletions", "do", "not", "appear", "to", "be", "involved." ]
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BACKGROUND AND AIM: The focus of the study was to investigate the frequencies of homozygous deletions and mutations of p16 gene in gastric carcinomas in the Kashmiri population. METHODS: A total of 84 gastric carcinoma patients were screened by the single strand conformation polymorphism (SSCP) technique and later by DNA sequencing to detect mutations of the p16 gene. Also PCR was applied further to further detect any homozygous deletions. RESULTS: SSCP and DNA sequencing performed encompassing all the three exons of p16 gene could not detect any mutations in any ofl 84 cases. Though we could observe mobility shifts in SSCP of two samples, subsequent DNA sequencing did not show any mutation. Further PCR could not detect any homozygous deletion in P16 in any case. CONCLUSION: Though Kashmir is a high incidence area of gastric carcinomas, p16gene mutations /or deletions do not appear to be involved.
15064320
[ "Compound", "heterozygous", "mutations", "in", "the", "SRD5A2", "gene", "exon", "4", "in", "a", "male", "pseudohermaphrodite", "patient", "of", "Chinese", "origin." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Compound heterozygous mutations in the SRD5A2 gene exon 4 in a male pseudohermaphrodite patient of Chinese origin.
15609295
[]
[]
16822828
[ "Genotyping", "of", "five", "chinese", "patients", "with", "17alpha-hydroxylase", "deficiency", "diagnosed", "through", "high-performance", "liquid", "chromatography", "serum", "adrenal", "profile:", "identification", "of", "two", "novel", "CYP17", "mutations." ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
Genotyping of five chinese patients with 17alpha-hydroxylase deficiency diagnosed through high-performance liquid chromatography serum adrenal profile: identification of two novel CYP17 mutations.
21850008
[ "The", "mutation", "pattern", "of", "mitochondrial", "DNA", "(mtDNA)", "in", "mainland", "Chinese", "patients", "with", "mitochondrial", "myopathy,", "encephalopathy,", "lactic", "acidosis", "and", "stroke-like", "episodes", "(MELAS)", "has", "been", "rarely", "reported,", "though", "previous", "data", "suggested", "that", "the", "mutation", "pattern", "of", "MELAS", "could", "be", "different", "among", "geographically", "localized", "populations.", "We", "presented", "the", "results", "of", "comprehensive", "mtDNA", "mutation", "analysis", "in", "92", "unrelated", "Chinese", "patients", "with", "MELAS", "(85", "with", "classic", "MELAS", "and", "7", "with", "MELAS/Leigh", "syndrome", "(LS)", "overlap", "syndrome).", "The", "mtDNA", "A3243G", " ", "mutation", "was", "the", "most", "common", "causal", "genotype", "in", "this", "patient", "group", "(79/92", "and", "85.9%).", "The", "second", "common", "gene", "mutation", "was", "G13513A", " ", "(7/92", "and", "7.6%).", "Additionally,", "we", "identified", "T10191C", " ", "(", "p.S45P", ")", "in", "ND3,", "A11470C", " ", "(", "p.", "K237N", ")", "in", "ND4,", "T13046C", " ", "(", "p.M237T", ")", "in", "ND5", "and", "a", "large-scale", "deletion", "(13025-13033:14417-14425)", "involving", "partial", "ND5", "and", "ND6", "subunits", "of", "complex", "I", "in", "one", "patient", "each.", "Among", "them,", "A11470C", ",", "T13046C", " ", "and", "the", "single", "deletion", "were", "novel", "mutations.", "In", "summary,", "patients", "with", "mutations", "affecting", "mitochondrially", "encoded", "complex", "I", "(MTND)", "reached", "12.0%", "(11/92)", "in", "this", "group.", "It", "is", "noteworthy", "that", "all", "seven", "patients", "with", "MELAS/LS", "overlap", "syndrome", "were", "associated", "with", "MTND", "mutations.", "Our", "data", "emphasize", "the", "important", "role", "of", "MTND", "mutations", "in", "the", "pathogenicity", "of", "MELAS,", "especially", "MELAS/LS", "overlap", "syndrome." ]
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The mutation pattern of mitochondrial DNA (mtDNA) in mainland Chinese patients with mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) has been rarely reported, though previous data suggested that the mutation pattern of MELAS could be different among geographically localized populations. We presented the results of comprehensive mtDNA mutation analysis in 92 unrelated Chinese patients with MELAS (85 with classic MELAS and 7 with MELAS/Leigh syndrome (LS) overlap syndrome). The mtDNA A3243G mutation was the most common causal genotype in this patient group (79/92 and 85.9%). The second common gene mutation was G13513A (7/92 and 7.6%). Additionally, we identified T10191C ( p.S45P ) in ND3, A11470C ( p. K237N ) in ND4, T13046C ( p.M237T ) in ND5 and a large-scale deletion (13025-13033:14417-14425) involving partial ND5 and ND6 subunits of complex I in one patient each. Among them, A11470C , T13046C and the single deletion were novel mutations. In summary, patients with mutations affecting mitochondrially encoded complex I (MTND) reached 12.0% (11/92) in this group. It is noteworthy that all seven patients with MELAS/LS overlap syndrome were associated with MTND mutations. Our data emphasize the important role of MTND mutations in the pathogenicity of MELAS, especially MELAS/LS overlap syndrome.