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Clinical Trial Summary

Congenital heart disease is one of the most common malformations in newborns. About 1% of newborns have cardiac malformations. Many need open heart surgery, which contributes substantially to pediatric mortality and morbidity. Recent advances in genetics suggest that many congenital heart defects are caused by mutation of genes. So far, half a dozen genes are found to be associated with congenital heart diseases, such as TBX5, NKX2.5, and GATA4, to name a few. In the near future, more genes will be identified. This study will evaluate the role of mutation of genes in congenital heart diseases and study the genotype-phenotype correlation. The central hypothesis is that a significant percentage of congenital heart disease is caused by mutation of genes involved in heart development, and the phenotype with missensed mutations is milder than nonsense mutation. Another hypothesis is that a significant proportion of patients with cardiac malformations will have mutations in their genes. The specific aim is to test the mutations of these genes in patients with congenital heart diseases. The study will provide substantial information to understand how the human heart develops. In the future, prenatal diagnosis could be developed based on this study.


Clinical Trial Description

Purpose: The purpose of this study is to evaluate the role of mutation of genes in congenital heart diseases and study the genotype-phenotype correlation. Hypothesis: The central hypothesis is that a significant percentage of congenital heart disease is caused by mutation of genes involved in heart development, and the phenotype with missensed mutations is milder than nonsense mutation. Another hypothesis is that a significant proportion of patients with cardiac malformations will have mutations in their genes. The specific aim is to test the mutations of these genes in patients with congenital heart diseases. Study Design and Procedures: This is a pilot study on mutation of genes in congenital heart diseases and genotype-phenotype correlation. Probands and family members are initially evaluated by a local physician or at the UCI Medical Center. A clinical diagnosis is made based on clinical information, echocardiography, EKG, and/or cardiac catheteration. We would like to correlate the mutation the specific type of congenital heart defect. For example, if mutations of TBX5 more likely cause atrial-septal defects, ventricular-septal defects; mutations PTPN11 is more likely cause pulmonary stenosis. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT00579358
Study type Observational
Source University of California, Irvine
Contact
Status Withdrawn
Phase
Start date November 2007
Completion date November 2007

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