Clinical trial NCT00083499: Mutations in Genes Associated With Pentalogy of Cantrell
Official title: Mutations in Genes Associated With Pentalogy of Cantrell
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Pentalogy of Cantrell
Keywords: Nonmuscle myosin IIB
Nonmuscle myosin IIA
Pentology of Cantrell
thoracoabdominal syndrdome
Nonmuscle Myosin IIC
Pentalogy of Cantrell
Non-muscle Myosin Heavy Chain Genes
Lead sponsor: National Institutes of Health Clinical Center (CC)
Sponsor class: NIH
First posted: 2004-05-25
Enrollment: 59
Sex: ALL
Maximum age (years): 100
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: FAMILY_BASED
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Primary clinical

Brief summary: This study will collect blood, urine, and other tissue samples from patients with Pentalogy of Cantrell (POC) and other inherited diseases that may involve mutations in non-muscle myosin II-B heavy chain (MYH10). We will also collect samples from the relatives of affected individuals. POC is a very rare disorder in which patients have a combination of severe defects of the middle of the chest including the sternum (breastbone), diaphragm, heart, and abdominal wall. The defect are apparent before birth or at birth.

Participants may undergo a medical evaluation that could include a medical history routine blood tests, urine collection, chest x-ray, and electrocardiogram. In addition, blood, urine, saliva, buccal swab or tissue samples may be collected for protein and gene studies. The blood is drawn through a very small needle placed in an arm vein. Children may choose to have a buccal (cheek) sample taken instead of blood draw. Buccal samples can be collected by a cheek swab, in which a soft brush is rubbed on the inside lining of the mouth, or by having the child hold a tablespoon of mouthwash in his or her mouth for a full minute and then spit the mouthwash into a container. In addition, tissue samples may be collected from patients if they undergoing any surgical procedures that may be required as part of their general medical care.

Some of the cells obtained from patients or their relatives may be used to establish cell lines (a living tissue sample) that can be grown in the laboratory and used for experiments.

...

Detailed description: The purpose of this multisite protocol is to collect protein, DNA, and RNA from blood, sputum, urine and/or tissue samples from patients with the diagnosis of Pentalogy of Cantrell (POC) or other related syndromes in order to identify possible causative genes. We will use whole exome/genome sequencing of probands, their parents, and, if available, the affected relatives of probands to look for any exomic/genomic mutations that could be associated with this syndrome. We have produced a mouse model with the mutant mice exhibiting problems with ventral wall closure including extrathoracic location of the heart (ectopia cordis), and defects in the abdominal wall with protrusion of the guts and liver. The mice, which have a single amino acid substitution in nonmuslce myosin II-B, have severe defects in both the heart and brain, and resemble humans born with POC, who manifest these same abnormalities.

Eligibility criteria: * INCLUSION CRITERIA:

  i. Index Cases
  1. Those patients who have a diagnosis of POC or other related syndromes (as defined under Study Design) confirmed by telephone discussion between the investigators and the patient s physician.
  2. Outside Institutions- All ages will be included
  3. At the Clinical Center - Those subjects that are greater than or equal to 2 years of age and older.

ii. Relatives of Index Cases

1. We may obtain samples from family members and/or relatives of those individuals who have a diagnosis of POC or other related syndrome confirmed by telephone discussion between the investigators and the referring physician with knowledge of the index case.
2. Outside Institutions - All ages will be included. At the Clinical Center - Those subjects that are greater than or equal to 2 years of age and older

iii. Fetal tissue:

1. We may obtain samples from patients with a fetal diagnosis of POC or other related syndrome with diagnosis confirmed by telephone discussion between the investigators and the referring physician.
2. Research use of the fetal tissue in accordance to NIH Division of Intramural Research (DIR) Program fetal tissue policy guidelines:

   1. No profits will be involved;
   2. NIH researchers will have no involvement in the termination of pregnancy, and
   3. The tissue must be obtained in accordance with Federal, state, and local law including those that govern basic research using human fetal tissue and research involving the transplantation of fetal tissue.

EXCLUSION CRITERIA:

Subjects seen at the Clinical Center - Those subjects that are less than or equal to 2 years of age and older.

Primary outcomes:
measure: Identify the gene(s) mutation (s) that causes Pentalogy of Cantrell
timeFrame: ongoing
Secondary outcomes:
measure: Since mutations in NM IIB may not be the sole cause of POC, we also intend to identify any other gene(s) mutation(s) that might be thecause of POC.
timeFrame: Ongoing
measure: We may wish to procure tissues from patients with nonmuscle myosin IIA and IIC mutations in order to study the mechanism underlyingthese abnormalities.
timeFrame: Ongoing
Other outcomes:
Locations:
city: Bethesda
country: United States
facility: National Institutes of Health Clinical Center, 9000 Rockville Pike
state: Maryland
city: Houston
country: United States
facility: Baylor College of Medicine
state: Texas
Study officials:
affiliation: National Heart, Lung, and Blood Institute (NHLBI)
name: Robert S Adelstein, M.D.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Ma X, Adelstein RS. In vivo studies on nonmuscle myosin II expression and function in heart development. Front Biosci (Landmark Ed). 2012 Jan 1;17(2):545-55. doi: 10.2741/3942.
citation: Ma X, Adelstein RS. The role of vertebrate nonmuscle Myosin II in development and human disease. Bioarchitecture. 2014;4(3):88-102. doi: 10.4161/bioa.29766. Epub 2014 Aug 6.
citation: Ma X, Adelstein RS. A point mutation in Myh10 causes major defects in heart development and body wall closure. Circ Cardiovasc Genet. 2014 Jun;7(3):257-65. doi: 10.1161/CIRCGENETICS.113.000455. Epub 2014 May 13.