bluuebunny/crossref_metadata_2025 huggingface dataset:
Forest structure altered by mountain pine beetle outbreaks affects subsequent attack in a Wyoming lodgepole pine forest, USA
Authors: Kashian Daniel M. , Jackson Rebecca M. , Lyons Heather D.
Published: November 2011

Extensive outbreaks of the mountain pine beetle ( Dendroctonus ponderosae Hopkins) will alter the structure of many stands that will likely be attacked again before experiencing a stand-replacing fire. We examined a stand of lodgepole pine ( Pinus contorta var. latifolia Engelm. ex S. Watson) in Grand Teton National Park currently experiencing a moderate-level outbreak and previously attacked by mountain pine beetle in the 1960s. Consistent with published studies, tree diameter was the main predictor of beetle attack on a given tree, large trees were preferentially attacked, and tree vigor, age, and cone production were unimportant variables for beetle attack at epidemic levels. Small trees killed in the stand were killed based mainly on their proximity to large trees and were likely spatially aggregated with large trees as a result of the previous outbreak. We concluded that the driving factors of beetle attack and their spatial patterns are consistent across outbreak severities but that stand structure altered by the previous outbreak had implications for the current outbreaks in the same location. This study should catalyze additional research that examines how beetle-altered stand structure affects future outbreaks — an important priority for predicting their impacts under climate change scenarios that project increases in outbreak frequency and extent.
Gene expression databases for kidney epithelial cells
Authors: Huling Jennifer C. , Pisitkun Trairak , Song Jae H. , Yu Ming-Jiun , Hoffert Jason D. , Knepper Mark A.
Published: November 2011

The 21st century has seen an explosion of new high-throughput data from transcriptomic and proteomic studies. These data are highly relevant to the design and interpretation of modern physiological studies but are not always readily accessible to potential users in user-friendly, searchable formats. Data from our own studies involving transcriptomic and proteomic profiling of renal tubule epithelia have been made available on a variety of online databases. Here, we provide a roadmap to these databases and illustrate how they may be useful in the design and interpretation of physiological studies. The databases can be accessed through http://helixweb.nih.gov/ESBL/Database .
Induction of albuminuria and kidney damage in SHR by transfer of chromosome 8 from Munich Wistar Frömter rats
Authors: Schulz Angela , Schütten-Faber Sabrina , van Es Nicole , Unland Johannes , Schulte Leonard , Kossmehl Peter , de Heer Emile , Kreutz Reinhold
Published: November 2011

Inbred Munich Wistar Frömter [MWF/FubRkb (RGD:724569), MWF] rats develop progressive albuminuria with age that is under polygenetic influence. We previously identified a major albuminuria quantitative trait locus (QTL) on rat chromosome (RNO)8 in MWF. To test the independent role of QTL(s) for albuminuria development on RNO8, we generated a consomic SHR-Chr 8MWF/Rkb (SHR-8MWF) strain by transferring RNO8 from MWF into the albuminuria-resistant background of the spontaneously hypertensive rat [SHR/FubRkb (RGD:631696; SHR)]. Young male MWF, SHR, and SHR-8MWF were sham-operated or unilaterally nephrectomized (Nx) at 6 wk and followed up to 24 wk of age, respectively. Systolic blood pressure was significantly lower in SHR-8MWF Sham compared with SHR Sham (−19.4 mmHg, P = 0.03) at 24 wk. In contrast, transfer of MWF-RNO8 into SHR induced a significant elevation of urinary albumin excretion (UAE) between weeks 12 and 24 in SHR-8MWF compared with SHR Sham animals ( P < 0.0001, respectively). Nx resulted in a significant increase in UAE in both strains during follow-up ( P < 0.0001, respectively), with significant higher values in SHR-8MWF compared with SHR ( P < 0.005, respectively). Renal structural changes as determined by glomerulosclerosis (GSI) and tubulointerstitial damage index (TDI) were significantly higher in consomic animals either at Sham (TDI) or Nx (GSI) conditions ( P < 0.05, respectively). These data confirm the independent role of MWF QTL(s) on RNO8 for both albuminuria and structural kidney damage. Moreover, this study shows for the first time the induction of albuminuria by transferring one or more albuminuria QTL into a resistant recipient background in a consomic rat strain.
A Continuous Millimeter-Wave Imaging Scanner for Art Conservation Science
Authors: Younus Ayesha , Caumes Jean-Pascal , Salort Simon , Chassagne Bruno , Pradère Christophe , Dautant Alain , Ziéglé Anne , Abraham Emmanuel
Published: November 2011

A monochromatic continuous millimeter-wave imaging system coupled with an infrared temperature sensor has been used to investigate artistic objects such as painting artworks or antiquities preserved at the museum of Aquitaine. Especially, 2D and 3D analyses have been performed in order to reveal the internal structure of a nearly 3500-year-old sealed Egyptian jar.
Output-Based Control of Robots with Variable Stiffness Actuation
Authors: Palli Gianluca , Melchiorri Claudio
Published: November 2011

The output-based control of a redundant robotic manipulator with relevant and adjustable joint stiffness is addressed. The proposed controller is configured as a cascade system that allows the decoupling of the actuators dynamics from the arm dynamics and the consequent reduction of the order of the manipulator dynamic model. Moreover, the proposed controller does not require the knowledge of the whole robot state: only the positions of the actuators and of the joints are necessary. This approach represents a significant simplification with respect to previously proposed state feedback techniques. The problem of controlling simultaneously the position trajectory and the desired stiffness in both the joint and work space is investigated, and the relations between the manipulator redundancy and the selection of both the joint and work space stiffness of the manipulator are discussed. The effectiveness of the proposed approach is verified by simulations of a 3 degrees of freedom planar manipulator.
Lifestyle Risk Factors and Cardiovascular Disease in Cubans and Cuban Americans
Authors: Burroughs Peña Melissa S. , Patel Dhaval , Rodríguez Leyva Delfin , Khan Bobby V. , Sperling Laurence
Published: November 2011

Cardiovascular disease is the leading cause of mortality in Cuba. Lifestyle risk factors for coronary heart disease (CHD) in Cubans have not been compared to risk factors in Cuban Americans. Articles spanning the last 20 years were reviewed. The data on Cuban Americans are largely based on the Hispanic Health and Nutrition Examination Survey (HHANES), 1982–1984, while more recent data on epidemiological trends in Cuba are available. The prevalence of obesity and type 2 diabetes mellitus remains greater in Cuban Americans than in Cubans. However, dietary preferences, low physical activity, and tobacco use are contributing to the rising rates of obesity, type 2 diabetes mellitus, and CHD in Cuba, putting Cubans at increased cardiovascular risk. Comprehensive national strategies for cardiovascular prevention that address these modifiable lifestyle risk factors are necessary to address the increasing threat to public health in Cuba.
Modulation of the Humoral Response to Dermatophagoides pteronyssinus Allergens in BALB/c Mice by Extract Modification and Adjuvant Use
Authors: Pico de Coaña Yago , Carnés Jerónimo , Gallego Maria T. , Alonso Carlos , Parody Nuria
Published: November 2011

Background: Currently, several strategies are being used in order to improve the safety and efficacy of allergen-specific immunotherapy; these strategies include the use of modified hypoallergenic extracts as well as different adjuvants with immunomodulatory properties in combination with native or modified extracts. The objectives of this study were to investigate the humoral response generated in mice to modified Dermatophagoides pteronyssinus extracts in the presence or absence of two different adjuvants. Methods: BALB/c mice were inoculated either with native, depigmented or depigmented-polymerised D. pteronyssinus without adjuvants or combined with aluminium hydroxide or oligodeoxinucleotides containing CpG motifs. IgE concentration, specific total IgG, IgG1 and IgG2a titres were measured in mice sera and cross-reactivity inhibition experiments were performed. IgG antigenic profiles were obtained by immunoblotting for all formulations. Results: Inoculation of depigmented-polymerised extract induced statistically significant lower IgE levels than the native extract even when adsorbed onto aluminium hydroxide. When this extract was inoculated in the presence of oligodeoxinucleotides containing CpG motifs, it elicited high IgG levels, a high IgG2a/lgG1 ratio and low IgE production. Furthermore, the antigenic profiles observed after extract inoculation showed punctual differences between the depigmented-polymerised extract and the native or depigmented extracts. Conclusions: Our results suggest that the depigmentation and polymerisation process modifies the native extract’s antigenic and immunogenic properties and converts the depigmented-polymerised extract into a better choice for allergen-specific immunotherapy.
Allergenicity and Cross-Reactivity of Booklice (Liposcelis bostrichophila): A Common Household Insect Pest in Japan
Authors: Fukutomi Yuma , Kawakami Yuji , Taniguchi Masami , Saito Akemi , Fukuda Azumi , Yasueda Hiroshi , Nakazawa Takuya , Hasegawa Maki , Nakamura Hiroyuki , Akiyama Kazuo
Published: November 2011

Background: Booklice (Liposcelis bostrichophila) are a common household insect pest distributed worldwide. Particularly in Japan, they infest ‘tatami’ mats and are the most frequently detected insect among all detectable insects, present at a frequency of about 90% in dust samples. Although it has been hypothesized that they are an important indoor allergen, studies on their allergenicity have been limited. Methods: To clarify the allergenicity of booklice and the cross-reactivity of this insect allergen with allergens of other insects, patients sensitized to booklice were identified from 185 Japanese adults with allergic asthma using skin tests and IgE-ELISA. IgE-inhibition analysis, immunoblotting and immunoblotting-inhibition analysis were performed using sera from these patients. Allergenic proteins contributing to specific sensitization to booklice were identified by two-dimensional electrophoresis and two-dimensional immunoblotting. Results: The booklouse-specific IgE antibody was detected in sera from 41 patients (22% of studied patients). IgE inhibition analysis revealed that IgE reactivity to the booklouse allergen in the sera from one third of booklouse-sensitized patients was not inhibited by preincubation with extracts from any other environmental insects in this study. Immunoblotting identified a 26-kD protein from booklouse extract as the allergenic protein contributing to specific sensitization to booklice. The amino acid sequence of peptide fragments of this protein showed no homology to those of previously described allergenic proteins, indicating that this protein is a new allergen. Conclusions: Sensitization to booklice was relatively common and specific sensitization to this insect not related to insect panallergy was indicated in this population.
Vaginal Douching Practices among Turkish Married Women
Authors: Erbil Nülüfer , Alışarlı Anıl , Terzi Hakime Çilem , Özdemir Kevser , Kuş Yeşim
Published: November 2011

Aim: This study was conducted to investigate the prevalence of the practice of vaginal douching among Turkish married women and associations between their douching status, predisposing factors, and effects on their health. Methods: This cross-sectional survey of women between 17 and 61 years of age was conducted between February 1, 2007, and May 18, 2007, in the Maternity-Gynecology and Children’s Hospital in Ordu, Turkey. The sample of this study included 427 women. A confidential and anonymous self-reported questionnaire was collected in a convenient sample of the women. Results: Of the 427 women in the study, 165 women (38.6%) had douched at some time. Housewives [odds ratio (OR) 2.660, 95% confidence interval (CI) 1.162–6.090], women who had experienced a spontaneous abortion (OR 4.676, 95% CI 1.606–13.618), or had beliefs about positive health effects of vaginal douching (OR 29.603, 95% CI 14.090–62.192) also had risk factors associated with vaginal douching practices. Conclusion: In conclusion, this study found that vaginal douching is a common practice among women. Many of the women who practiced vaginal douching believed in its health benefits. The results may enhance healthcare practitioners’ knowledge and efforts to educate their patients.
Intracoronary Compared to Intravenous Abciximab in Patients with ST Segment Elevation Myocardial Infarction Treated with Primary Percutaneous Coronary Intervention Reduces Mortality, Target Vessel Revascularization and Reinfarction after 1 Year
Authors: Iversen Allan Zeeberg , Galatius Soeren , Abildgaard Ulrik , Galloe Anders , Hansen Peter Riis , Pedersen Sune , Engstroem Thomas , Jensen Jan Skov
Published: November 2011

Objectives: Administration of the glycoprotein IIb/IIIa inhibitor abciximab to patients with ST segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (pPCI) improves outcome. Data have suggested that an intracoronary (IC) bolus might be superior to the standard intravenous (IV) administration. We have previously reported reduced short-term mortality and need for target vessel revascularization (TVR) with the IC route. We now present long-term data from our randomized trial on IC versus IV abciximab in pPCI-treated STEMI patients. Methods: A total of 355 pPCI-treated STEMI patients were randomized to either IC or IV bolus abciximab followed by a 12-hour IV infusion. Patients were followed for 1 year to observe mortality, TVR or myocardial infarction (MI) and the combination of these. Results: The two treatment arms (IV, n = 170; IC, n = 185) were similar with regard to baseline characteristics. Mortality was reduced from 10% in the IV group to 2.7% in the IC group (p = 0.004). TVR and MI were also reduced with IC administration (TVR: 14.1 vs. 7.6%, p = 0.04; MI: 11.8 vs. 5.4%, p = 0.03). Consequently, patients in the IC treatment arm had a relative risk reduction of 55% for the combined endpoint after 1 year (p = 0.002) compared to the IV treatment arm. Conclusions: In pPCI-treated STEMI patients treated with abciximab, IC bolus administration resulted in a significant reduction in mortality, TVR and MI compared to IV bolus administration.
Could Disappearance of Endemic (Balkan) Nephropathy Be Expected in Forthcoming Decades?
Authors: Cvitković Ante , Vuković-Lela Ivana , Edwards Karen L. , Karanović Sandra , Jurić Dragana , Čvorišćec Dubravka , Fuček Mirjana , Jelaković Bojan
Published: November 2011

Background/Aims: An epidemiological survey of endemic nephropathy (EN) was performed in endemic Croatian areas and the current prevalence was compared to that reported for the same villages several decades ago. Methods: A total of 2,487 adult farmers from 6 endemic villages and 3 non-endemic villages were enrolled. An extensive epidemiological questionnaire, clinical examination and laboratory analyses of blood and urine were performed. According to the modified WHO criteria, participants were classified into diseased, suspected of having EN, and those at risk of developing EN. Results: The overall prevalence of EN in the Croatian areas was 1.0%, ranging between 0.3 and 2.3% in different villages. Those suspected of having EN amounted to 3.9%. In the endemic villages a decreasing trend in the prevalence of EN was observed comparable to the results obtained in previous surveys. It is interesting to note that no EN patients were recorded in the endemic village of Dubočac. Conclusion: The prevalence of EN in the endemic Croatian areas appears to be decreasing. For the first time, we failed to detect any EN patients in a village that was previously considered endemic, which might indicate that EN is diminishing.
Development of the Penile Urethra in the Tammar Wallaby
Authors: Leihy M.W. , Shaw G. , Wilson J.D. , Renfree M.B.
Published: November 2011

Hypospadias is increasingly common, and requires surgery to repair, but its aetiology is poorly understood. The marsupial tammar wallaby provides a unique opportunity to study hypospadias because penile differentiation occurs postnatally. Androgens are responsible for penile development in the tammar, but the majority of differentiation, in particular formation and closure of the urethral groove forming the penile urethra in males, occurs when there is no measurable sex difference in the concentrations of testosterone, dihydrotestosterone or androstanediol in either the gonads or the circulation. Phalluses were examined morphologically from the sexually indifferent period (when androgens are high) to well after the time that the phallus becomes sexually dimorphic. We show that penile development and critical changes in the positioning of the urethra occur in the male phallus begin during an early window of time when androgens are high. Remodelling of the urethra in the male occurs between days 20–60. The critical period of time for the establishment urethral closure occurs during the earliest phases of penile development. This study suggests that there is an early window of time before day 60 when androgen imprinting must occur for normal penile development and closure of the urethral groove.
Altered Thalamocortical Functional Connectivity by Propofol Anesthesia in Rats
Authors: Tu Ye , Yu Tian , Fu Xiao-Yun , Xie Peng , Lu Sv , Huang Xiao-Qi , Gong Qi-Yong
Published: November 2011

Anesthesia, a state of profound central nervous system suppression, involves a sequence of events that is still not well understood. In the present study, we examined the action of propofol (a sedative-hypnotic drug commonly used as anesthetic) on thalamocortical functional connectivity in rats by using functional connectivity magnetic resonance imaging (fcMRI) with a 3.0-tesla MR scanner. Intraperitoneal injections of propofol (80 or 160 mg/kg) were administered to Sprague-Dawley rats. Synchronized low-frequency fluctuations (LFF) of blood oxygen level-dependent (BOLD) signals were found between the thalamic and somatosensory cortices (S1/S2) after administration of 80 mg/kg propofol. However, after application of 160 mg/kg propofol, synchronized LFF of BOLD signals disappeared. These observations indicate that thalamocortical connectivity may play an important role in propofol anesthesia. We also observed that regionally specific long-range correlations of spontaneous low-frequency physiological fluctuations in BOLD signals may be present across somatosensory networks of the brain in the absence of external stimulation. However, our experiment suggests that fcMRI can be used to investigate brain networks that exhibit correlated fluctuations.
Effects of a Novel Nonantibiotic Macrolide, EM900, on Cytokine and Mucin Gene Expression in a Human Airway Epithelial Cell Line
Authors: Otsu Kazuya , Ishinaga Hajime , Suzuki Shinya , Sugawara Akihiro , Sunazuka Toshiaki , Omura Satoshi , Jono Hirofumi , Takeuchi Kazuhiko
Published: November 2011

Background/Aims: Long-term macrolide therapy is an effective treatment for chronic sinusitis and diffuse panbronchiolitis. However, long-term use of macrolides may promote the growth of drug-resistant bacteria; therefore, development of macrolides with no antibacterial action is desirable. A new erythromycin (EM) derivative, (8R,9S)- 8,9-dihydro-6,9-epoxy-8,9-anhydropseudoerythromycin A (EM900), does not possess antibacterial action. Methods: To determine whether EM900 induced a clinically relevant anti-inflammatory response and repressed mucin gene expression in cells derived from human airway epithelia, we assessed the effects of EM900 on IL-1β-induced inflammatory cytokines in A549 cells and MUC5AC gene expression in HM3-MUC5AC cells. We also investigated the effects of EM900 on IL-1β-induced NF-ĸB activation. We performed reporter gene assays and quantitative PCR in A549 and HM3-MUC5AC cells. Results: Both EM and EM900 suppressed IL-1β-induced IL-8 expression in A549 cells. EM900 also suppressed IL-1β-induced IL-1β and TNF-α expression in A549 cells. EM900 inhibited IL-1β-induced MUC5AC expression in HM3-MUC5AC cells. Both EM and EM900 suppressed IL-1β-induced NF-ĸB activation in A549 cells. Conclusion: This study demonstrated that EM900 suppressed the induction of inflammatory cytokines and MUC5AC gene expression in cells derived from human airway epithelia, and our findings indicate that these effects may be mediated by the suppression of NF-ĸB activation.
Coamplification of Multiple Regions of Chromosome 2, Including MYCN, in a Single Patchwork Amplicon in Cancer Cell Lines
Authors: Kitada K. , Aida S. , Aikawa S.
Published: November 2011

Coamplification of multiple segments of chromosome 2, including an MYCN-bearing segment, was examined in 2 cancer cell lines, NCI-H69 (lung cancer) and IMR-32 (neuroblastoma). High-resolution array-CGH analysis revealed 13 and 6 highly amplified segments located at different sites in chromosome 2 in NCI-H69 and IMR-32, respectively. FISH analysis demonstrated that these segments were co-localized in double minutes in NCI-H69 and in homogeneously staining regions in IMR-32. Connectivity of the segments was determined by a PCR assay using designed primer sets. It was found that all the segments were connected to each other irrespective of their order and orientation against the genome sequence, and a single chain-like cluster was configured in both cell lines. Such patchwork structures of the amplicons suggest the possibility that massive genomic rearrangements, explained by the single catastrophic event model, are involved in the formation of the amplicons, enabling the coamplification of different chromosomal regions including the MYCN locus. The model comprises massive fragmentation of chromosomes and random rejoining of the fragments.
Early Decrease in α-Fetoprotein, but Not Des-γ-Carboxy Prothrombin, Predicts Sorafenib Efficacy in Patients with Advanced Hepatocellular Carcinoma
Authors: Kuzuya Teiji , Asahina Yasuhiro , Tsuchiya Kaoru , Tanaka Keisuke , Suzuki Yuichiro , Hoshioka Takahide , Tamaki Shinji , Kato Tomoji , Yasui Yutaka , Hosokawa Takahiro , Ueda Ken , Nakanishi Hiroyuki , Itakura Jun , Takahashi Yuka , Kurosaki Masayuki , Izumi Namiki
Published: November 2011

Objectives: The aim of this study was to investigate the relationships between early changes in the tumor markers α-fetoprotein (AFP) and des-γ-carboxy prothrombin (DCP), and antitumor response in the early period following administration of sorafenib in patients with advanced hepatocellular carcinoma (HCC). Methods: Forty-eight advanced HCC patients were evaluated. AFP and DCP were measured at baseline, and after 2 and 4 weeks, and the antitumor responses were evaluated according to the RECIST criteria 4 weeks after starting sorafenib therapy. The ratios of each tumor marker were compared by stratifying the patients into the partial response (PR) + stable disease (SD) group or the progressive disease (PD) group. Results: Both 2 and 4 weeks after starting sorafenib therapy, the AFP ratio in the PR + SD group (n = 32) was significantly lower than in the PD group (n = 16; p = 0.002, p = 0.002). DCP was elevated in both the PR + SD group and the PD group 2 weeks and 4 weeks after starting sorafenib therapy. Conclusions: Evaluation of AFP ratios 2 and 4 weeks after starting sorafenib therapy may be useful for predicting antitumor response. On the other hand, early elevation of DCP does not necessarily suggest treatment failure by sorafenib, as DCP elevation can occur despite therapeutic efficacy.
Expression Profiling of Wnt Signaling Genes during Gonadal Differentiation and Gametogenesis in Rainbow Trout
Authors: Nicol B. , Guiguen Y.
Published: November 2011

Wnt signaling plays major roles in various processes, including ovarian differentiation and development in mammals. In order to explore its potential implication during gonadal development in a nonmammalian vertebrate species, expression of Wnt signaling genes was investigated in rainbow trout during gonadal differentiation and gametogenesis. Multiple Wnt pathway genes were expressed and exhibited distinct expression patterns. In ovary, tcf7 was highly expressed during early differentiation, whereas no sexually dimorphic expression of rspo1 was detected. During later ovarian development, wnt11 was highly expressed in granulosa cells and oocytes suggesting an implication in folliculogenesis and oogenesis, whereas wnt9b was principally detected in granulosa cells. In testis, Wnt pathway genes were mostly expressed during early spermatogenesis. Overall, these present results suggest that Wnt signaling is implicated in multiple processes of male and female gonadal development and provide basis for future studies on Wnt signaling functions in teleost fish gonads.
Identification of Coronary Plaque Sub-Types Using Virtual Histology Intravascular Ultrasound Is Affected by Inter-Observer Variability and Differences in Plaque Definitions
Authors: Obaid Daniel R. , Calvert Patrick A. , McNab Duncan , West Nick E.J. , Bennett Martin R.
Published: November 2011

Background—

Recent studies show that virtual histology intravascular ultrasound (VH-IVUS) can identify plaques at high risk of rupture, such as thin-capped fibroatheromata, raising the possibility of immediate targeted intervention. However, plaque classification entails border recognition and subjective assessment of plaque architecture, introducing inter-observer variability without confirmation by core-labs. Furthermore, the accuracy of local versus core-laboratory VH-IVUS plaque classification and effects of different plaque definitions have not been examined.

Methods and Results—

Local observers classified 100 VH-IVUS-defined coronary plaques to determine single center inter-observer variability; multi-center variability was determined by comparison with VH-IVUS core-laboratory analysis, and compared with gray-scale IVUS. Frequency of plaque types using different published plaque definitions also was determined. Single-center VH-IVUS inter-observer agreement was strong (kappa=0.86), but lower for thin-capped fibroatheromatas (k=0.59) because of observer judgments on presence and location of confluent necrotic core. Multi-center inter-observer agreement for plaque classification was lower again (k=0.71), particularly for thin-capped fibroatheromatas (k=0.56). Different plaque definitions further reduced VH-IVUS-defined thin-capped fibroatheromata numbers by 44%. The diagnostic accuracy of gray-scale IVUS to identify thin-capped fibroatheromata was poor for both observers (21 and 29% correct), with low inter-observer agreement (k=0.14).

Conclusions—

VH-IVUS plaque classification, and particularly VH-IVUS-defined thin-capped fibroatheromata identification, varies significantly between local observers, and particularly in comparison with core-laboratory analysis. Differences in VH-IVUS plaque definitions introduce further variability between studies. These factors reduce the use of VH-IVUS plaque classification to guide intervention in a “live” clinical setting, and also affect comparison of diagnostic accuracy and natural history of plaques between studies.
Correlates of Tricuspid Regurgitation as Determined by 3D Echocardiography: Pulmonary Arterial Pressure, Ventricle Geometry, Annular Dilatation, and Papillary Muscle Displacement
Authors: Spinner Erin M. , Lerakis Stamatios , Higginson Jason , Pernetz Maria , Howell Sharon , Veledar Emir , Yoganathan Ajit P.
Published: November 2011

Background—

While it is understood that annular dilatation contributes to tricuspid regurgitation (TR), other factors are less clear. The geometry of the right ventricle (RV) and left ventricle (LV) may alter tricuspid annulus size and papillary muscle (PM) positions leading to TR.

Methods and Results—

Three-dimensional echocardiographic images were obtained at Emory University Hospital using a GE Vivid 7 ultrasound system. End-diastolic area was used to classify ventricle geometry: control (n=21), isolated RV dilatation (n=17), isolated LV dilatation (n=13), and both RV and LV dilatation (n=13). GE EchoPAC was used to measure annulus area and position of the PM tips. Patients with RV dilatation had significant (
P
≤ 0.05) displacement of all PMs apically and the septal PM and posterior PM away from the center of the RV toward the LV. Patients with LV dilatation had significant (
P
≤0.05) apical displacement of the anterior PM. Pulmonary arterial pressure (
r
=0.66), annulus area (
r
=0.51), apical displacement of the anterior PM (
r
=0.26), posterior PM (
r
=0.49), and septal PM (
r
=0.40), lateral displacement of the septal PM (
r
=0.37) and posterior PM (
r
=0.40), and tenting area and height (
r
=0.54, 0.49), were significantly (
P
≤0.05) correlated to the grade of TR. Ventricle classification (
r
=0.46) and RV end-diastolic area (
r
=0.48) also were correlated with the grade of TR. A regression analysis found ventricle classification (
P
=0.001), pulmonary arterial pressure (
P
≤0.001) annulus area (
P
=0.027), and apical displacement of the anterior PM (
P
=0.061) to be associated with the grade of TR.

Conclusions—

Alterations in ventricular geometry can lead to TR by altering both tricuspid annulus size and PM position. Understanding these geometric interactions with the aim of correcting pathological alterations of the tricuspid valve apparatus may lead to more robust repairs.
The Association Between Self-Concealment From One’s Partner and Relationship Well-Being
Authors: Uysal Ahmet , Lin Helen Lee , Knee C. Raymond , Bush Amber L.
Published: November 2011

In two studies the authors examined whether self-concealment from one’s partner is associated with lower relationship well-being. In Study 1, participants who were in a romantic relationship ( N = 165) completed an online survey. Self-concealment from one’s partner was associated with lower relationship satisfaction and commitment. Furthermore, results were consistent with this relationship being mediated by autonomy and relatedness needs. In Study 2, couples ( N = 50) completed daily records for 14 consecutive days. Multilevel analyses indicated that daily self-concealment from one’s partner was associated with daily relationship satisfaction, commitment, and conflict. Lagged analyses also showed that self-concealment from one’s partner predicted lower relationship well-being on the following day. Moreover, results supported that thwarted basic needs mediated the association between daily self-concealment and relationship well-being. Finally, actor-partner interdependence model over time analyses indicated that, apart from one’s own self-concealment, one’s partner’s self-concealment was associated negatively with one’s own relationship well-being.
Beliefs and Effective Practices of Successful Principals in High Schools With a Hispanic Population of at Least 30%
Authors: Gerhart Linda Gray , Harris Sandra , Mixon Jason
Published: November 2011

The purpose of this qualitative study was to investigate the effective beliefs and practices of successful principals at high schools with a Hispanic population of at least 30%. Eight purposefully selected high school principals participated in the study. Findings emphasized that successful principals are passionate in their commitment to support all students, maintain an atmosphere where high standards and expectations are commonplace, find time to build effective relationships, recognize when change is necessary, and use effective change processes.
Cochlear Implantation in Children with Anomalous Cochleovestibular Anatomy
Authors: Pakdaman Michael N. , Herrmann Barbara S. , Curtin Hugh D. , Van Beek‐King Jessica , Lee Daniel J.
Published: November 2011

Our aim was to determine the influence of inner‐ear anomalies on surgical difficulty and postoperative audiologic outcomes among pediatric cochlear implant (CI) recipients at our institution. We reviewed medical and audiologic records from 78 consecutive pediatric CI cases between 1985 and June 2009. Thirty patients had high‐resolution temporal bone computed tomography imaging available for retrospective interpretation. Seven of these 30 patients (23%) had cochleovestibular dysplasia. Fifty percent of patients with severe dysplasia had a cerebrospinal fluid gusher intraoperatively, compared with 13% of patients with no dysplasia. Of patients with available audiologic outcome data, 17 of 26 patients with normal/mild/moderate dysplasia were able to complete CNC testing, whereas neither of the 2 patients with severe dysplasia could complete the open set test. Our experience suggests that surgical difficulty and audiologic outcomes in pediatric CI recipients may be affected by the presence and severity of a cochleovestibular anomaly.
Response to the Polysomnography Commentary by Tunkel
Authors: Roland Peter S. , Mitchell Ron B.
Published: November 2011

An evidence‐based clinical practice guideline on the use of polysomnography (PSG) in children before tonsillectomy has recently been published. The indications for PSG prior to tonsillectomy continue to be debated. We highlight important aspects of this guideline, including the targeted age range of 2 to 18 years, the fact that this guideline is not about indications for tonsillectomy, and the importance of sharing the results of PSG with the anesthesiologist when available. We believe that this evidence‐based clinical practice guideline will help otolaryngologists in appropriate use of PSG when managing children with sleep‐disordered breathing.
Histopathological Features of Keratocystic Odontogenic Tumor
Authors: Azevedo Rebeca Souza , Cabral Márcia Grillo , Santos Teresa Cristina Ribeiro Bartholomeu dos , de Oliveira Albanita Viana , de Almeida Oslei Paes , Pires Fábio Ramôa
Published: November 2011

The aim of this study was to describe the clinicopathologic features of 177 keratocystic odontogenic tumors (KCOTs) diagnosed in a Brazilian population. A total of 177 KCOTs were reviewed and affected 158 patients with ages ranging from 5 to 79 years (mean age = 32 years) with a slight female predominance. Mandible was the most common affected site (69.3%), and a unilocular radiolucency was the most common radiographic image. Microscopically, all cases showed at least focal areas of classic KCOT, but several histological aspects were also observed, including diffuse and focal epithelial lining hyperplasia (48.6%), epithelial budding (12.4%), reactive cytological alterations (11.3%), dystrophic calcification (7.9%), daughter cysts (7.8%), odontogenic epithelial remnants (4.5%), focal areas of orthokeratinization (2.8%), and ameloblastomatous epithelium (1.7%). These variations may make KCOT diagnosis challenging in some cases, so careful full-sample analysis and knowledge of these uncommon histological features associated with KCOT are essential for correct diagnosis.
The CXCR7 chemokine receptor promotes B-cell retention in the splenic marginal zone and serves as a sink for CXCL12
Authors: Wang Hongsheng , Beaty Natalie , Chen Sophia , Qi Chen-Feng , Masiuk Marek , Shin Dong-Mi , Morse Herbert C.
Published: November 2011

The splenic marginal zone (MZ) is comprised of specialized populations of B cells, dendritic cells, and macrophages that are uniquely arrayed outside the white pulp follicles to screen the blood for bacterial and other particulate Ags. Mechanisms responsible for MZ B-cell formation, localization, retention, and function are understood to include antigenic specificity, transcription factors, integrins, and surface receptors for soluble ligands such as S1P. Here, we add to this repertoire by demonstrating that the receptor for CXCL12, CXCR7, is expressed on MZ but not on follicular B cells. Treatment of mice with CXCR7 inhibitors led to disruption of MZ architecture, reduced numbers of MZ B cells, and altered granulocyte homeostasis associated with increasing serum levels of CXCL12. CXCR7 thus appears to function as a scavenger receptor for CXCL12 on MZ B cells.
Superstability of approximate d'Alembert harmonic functions
Authors: Kim Hark-Mahn , Kim Gwang Hui , Han Mi Hyun
Published: November 2011

In this article, we study the superstability problem for the complex-valued functional equation

f

(

x
+
y
+
z

)

+
f

(

x
+
y
-
z

)

+
f

(

y
+
z
-
x

)

+
f

(

z
+
x
-
y

)

=
4
f

(

x

)

f

(

y

)

f

(

z

)

on an abelian group and on a commutative semisimple Banach algebra. As a result, we obtain application to harmonic functions satisfying the equation approximately.
Horizontal gene transfer in Histophilus somni and its role in the evolution of pathogenic strain 2336, as determined by comparative genomic analyses
Authors: Siddaramappa Shivakumara , Challacombe Jean F , Duncan Alison J , Gillaspy Allison F , Carson Matthew , Gipson Jenny , Orvis Joshua , Zaitshik Jeremy , Barnes Gentry , Bruce David , Chertkov Olga , Detter J Chris , Han Cliff S , Tapia Roxanne , Thompson Linda S , Dyer David W , Inzana Thomas J
Published: November 2011

Background

Pneumonia and myocarditis are the most commonly reported diseases due to Histophilus somni, an opportunistic pathogen of the reproductive and respiratory tracts of cattle. Thus far only a few genes involved in metabolic and virulence functions have been identified and characterized in H. somni using traditional methods. Analyses of the genome sequences of several Pasteurellaceae species have provided insights into their biology and evolution. In view of the economic and ecological importance of H. somni, the genome sequence of pneumonia strain 2336 has been determined and compared to that of commensal strain 129Pt and other members of the Pasteurellaceae.

Results

The chromosome of strain 2336 (2,263,857 bp) contained 1,980 protein coding genes, whereas the chromosome of strain 129Pt (2,007,700 bp) contained only 1,792 protein coding genes. Although the chromosomes of the two strains differ in size, their average GC content, gene density (total number of genes predicted on the chromosome), and percentage of sequence (number of genes) that encodes proteins were similar. The chromosomes of these strains also contained a number of discrete prophage regions and genomic islands. One of the genomic islands in strain 2336 contained genes putatively involved in copper, zinc, and tetracycline resistance. Using the genome sequence data and comparative analyses with other members of the Pasteurellaceae, several H. somni genes that may encode proteins involved in virulence (e.g., filamentous haemaggutinins, adhesins, and polysaccharide biosynthesis/modification enzymes) were identified. The two strains contained a total of 17 ORFs that encode putative glycosyltransferases and some of these ORFs had characteristic simple sequence repeats within them. Most of the genes/loci common to both the strains were located in different regions of the two chromosomes and occurred in opposite orientations, indicating genome rearrangement since their divergence from a common ancestor.

Conclusions

Since the genome of strain 129Pt was ~256,000 bp smaller than that of strain 2336, these genomes provide yet another paradigm for studying evolutionary gene loss and/or gain in regard to virulence repertoire and pathogenic ability. Analyses of the complete genome sequences revealed that bacteriophage- and transposon-mediated horizontal gene transfer had occurred at several loci in the chromosomes of strains 2336 and 129Pt. It appears that these mobile genetic elements have played a major role in creating genomic diversity and phenotypic variability among the two H. somni strains.
The complete mitochondrial genome of Flustra foliacea (Ectoprocta, Cheilostomata) - compositional bias affects phylogenetic analyses of lophotrochozoan relationships
Authors: Nesnidal Maximilian P , Helmkampf Martin , Bruchhaus Iris , Hausdorf Bernhard
Published: November 2011

Background

The phylogenetic relationships of the lophophorate lineages, ectoprocts, brachiopods and phoronids, within Lophotrochozoa are still controversial. We sequenced an additional mitochondrial genome of the most species-rich lophophorate lineage, the ectoprocts. Although it is known that there are large differences in the nucleotide composition of mitochondrial sequences of different lineages as well as in the amino acid composition of the encoded proteins, this bias is often not considered in phylogenetic analyses. We applied several approaches for reducing compositional bias and saturation in the phylogenetic analyses of the mitochondrial sequences.

Results

The complete mitochondrial genome (16,089 bp) of Flustra foliacea (Ectoprocta, Gymnolaemata, Cheilostomata) was sequenced. All protein-encoding, rRNA and tRNA genes are transcribed from the same strand. Flustra shares long intergenic sequences with the cheilostomate ectoproct Bugula, which might be a synapomorphy of these taxa. Further synapomorphies might be the loss of the DHU arm of the tRNA L(UUR), the loss of the DHU arm of the tRNA S(UCN) and the unique anticodon sequence GAG of the tRNA L(CUN). The gene order of the mitochondrial genome of Flustra differs strongly from that of the other known ectoprocts. Phylogenetic analyses of mitochondrial nucleotide and amino acid data sets show that the lophophorate lineages are more closely related to trochozoan phyla than to deuterostomes or ecdysozoans confirming the Lophotrochozoa hypothesis. Furthermore, they support the monophyly of Cheilostomata and Ectoprocta. However, the relationships of the lophophorate lineages within Lophotrochozoa differ strongly depending on the data set and the used method. Different approaches for reducing heterogeneity in nucleotide and amino acid data sets and saturation did not result in a more robust resolution of lophotrochozoan relationships.

Conclusion

The contradictory and usually weakly supported phylogenetic reconstructions of the relationships among lophotrochozoan phyla based on mitochondrial sequences indicate that these alone do not contain enough information for a robust resolution of the relations of the lophotrochozoan phyla. The mitochondrial gene order is also not useful for inferring their phylogenetic relationships, because it is highly variable in ectoprocts, brachiopods and some other lophotrochozoan phyla. However, our study revealed several rare genomic changes like the evolution of long intergenic sequences and changes in the structure of tRNAs, which may be helpful for reconstructing ectoproct phylogeny.
Characterization of Sucrose transporter alleles and their association with seed yield-related traits in Brassica napus L
Authors: Li Fupeng , Ma Chaozhi , Wang Xia , Gao Changbin , Zhang Jianfeng , Wang Yuanyuan , Cong Na , Li Xinghua , Wen Jing , Yi Bin , Shen Jinxiong , Tu Jinxing , Fu Tingdong
Published: November 2011

Background

Sucrose is the primary photosynthesis product and the principal translocating form within higher plants. Sucrose transporters (SUC/SUT) play a critical role in phloem loading and unloading. Photoassimilate transport is a major limiting factor for seed yield. Our previous research demonstrated that SUT co-localizes with yield-related quantitative trait loci. This paper reports the isolation of BnA7.SUT1 alleles and their promoters and their association with yield-related traits.

Results

Two novel BnA7.SUT1 genes were isolated from B. napus lines 'Eagle' and 'S-1300' and designated as BnA7.SUT1.a and BnA7.SUT1.b, respectively. The BnA7.SUT1 protein exhibited typical SUT features and showed high amino acid homology with related species. Promoters of BnA7.SUT1.a and BnA7.SUT1.b were also isolated and classified as pBnA7.SUT1.a and pBnA7.SUT1.b, respectively. Four dominant sequence-characterized amplified region markers were developed to distinguish BnA7.SUT1.a and BnA7.SUT1.b. The two genes were estimated as alleles with two segregating populations (F2 and BC1) obtained by crossing '3715'×'3769'. BnA7.SUT1 was mapped to the A7 linkage group of the TN doubled haploid population. In silico analysis of 55 segmental BnA7.SUT1 alleles resulted three BnA7.SUT1 clusters: pBnA7.SUT1.a- BnA7.SUT1.a (type I), pBnA7.SUT1.b- BnA7.SUT1.a (type II), and pBnA7.SUT1.b- BnA7.SUT1.b (type III). Association analysis with a diverse panel of 55 rapeseed lines identified single nucleotide polymorphisms (SNPs) in promoter and coding domain sequences of BnA7.SUT1 that were significantly associated with one of three yield-related traits: number of effective first branches (EFB), siliques per plant (SP), and seed weight (n = 1000) (TSW) across all four environments examined. SNPs at other BnA7.SUT1 sites were also significantly associated with at least one of six yield-related traits: EFB, SP, number of seeds per silique, seed yield per plant, block yield, and TSW. Expression levels varied over various tissue/organs at the seed-filling stage, and BnA7.SUT1 expression positively correlated with EFB and TSW.

Conclusions

Sequence, mapping, association, and expression analyses collectively showed significant diversity between the two BnA7.SUT1 alleles, which control some of the phenotypic variation for branch number and seed weight in B. napus consistent with expression levels. The associations between allelic variation and yield-related traits may facilitate selection of better genotypes in breeding.
Mitochondrial DNA (mtDNA) haplogroups and serum levels of anti-oxidant enzymes in patients with osteoarthritis
Authors: Fernandez-Moreno Mercedes , Soto-Hermida Angel , Pertega Sonia , Oreiro Natividad , Fernandez-Lopez Carlos , Rego-Perez Ignacio , Blanco Francisco J
Published: November 2011

Background

Oxidative stress play a main role in the initiation and progression of the OA disease and leads to the degeneration of mitochondria. To prevent this, the chondrocytes possess a well-coordinated enzymatic antioxidant system. Besides, the mitochondrial DNA (mtDNA) haplogroups are associated with the OA disease. Thus, the main goal of this work is to assess the incidence of the mtDNA haplogroups on serum levels of two of the main antioxidant enzymes, Manganese Superoxide Dismutase (Mn-SOD or SOD2) and catalase, and to test the suitability of these two proteins for potential OA-related biomarkers.

Methods

We analyzed the serum levels of SOD2 and catalase in 73 OA patients and 77 healthy controls carrying the haplogroups J, U and H, by ELISA assay. Knee and hip radiographs were classified according to Kellgren and Lawrence (K/L) scoring from Grade 0 to Grade IV. Appropriate statistical analyses were performed to test the effects of clinical variables, including gender, body mass index (BMI), age, smoking status, diagnosis, haplogroups and radiologic K/L grade on serum levels of these enzymes.

Results

Serum levels of SOD2 appeared statistically increased in OA patients when compared with healthy controls (p < 0.001). Even in those OA patients with higher OA severity (K/L grade IV), the serum levels of this antioxidant enzyme appeared more significantly increased than in OA patients with lower K/L grade (p < 0.001). The mtDNA haplogroups showed an influence on serum levels of catalase (p = 0.054), being carriers of the mtDNA haplogroup J those who showed higher serum levels than non-J carriers (p = 0.057).

Conclusions

The increased levels of SOD2 in OA patients indicate an increased oxidative stress OA-related, therefore this antioxidant enzyme could be a suitable candidate biomarker for diagnosis of OA. Mitochondrial haplogroups significantly correlates with serum levels of catalase