Related Experiment Videos
The genetic basis of pediatric cardiovascular disease
1Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA.
Insights
Single gene defects are a major cause of pediatric heart conditions like congenital heart disease and cardiomyopathy. Research highlights genetic links to various vasculopathies and myocardial disorders, impacting cardiovascular development.
Area of Science:
- Pediatric Cardiology
- Human Genetics
- Molecular Biology
Background:
- Congenital heart disease (CHD), cardiomyopathy, and vasculopathies are significant causes of pediatric mortality and morbidity.
- Many of these conditions manifest even in the perinatal period.
Purpose of the Study:
- To review the evidence linking single gene defects to various pediatric cardiovascular diseases.
- To discuss specific genetic causes of vasculopathies, cardiomyopathies, and congenital heart defects.
Main Methods:
- Review of existing scientific literature and evidence.
- Discussion of gene ablation models in mice.
- Presentation of human genetic studies, including positional cloning and cytogenetic analyses.
Main Results:
- Single gene defects are implicated in numerous pediatric heart diseases.
- Specific genetic causes for Marfan's syndrome, Williams' syndrome, hypertrophic cardiomyopathy, dilated cardiomyopathy, and various CHDs are presented.
- Mouse models demonstrate cardiac phenotypes similar to human CHDs.
Conclusions:
- Genetic factors play a crucial role in the etiology of pediatric cardiovascular diseases.
- Advances in genetic research provide insights into human cardiovascular development and disease.
- Understanding these genetic underpinnings is vital for diagnosis and potential therapeutic strategies.
Abstract:
Congenital heart disease (CHD), cardiomyopathy, and vasculopathies are common causes of mortality and morbidity in pediatrics, including the perinatal period. This article reviews evidence that single gene defects cause many of the pediatric heart diseases. Vasculopathies discussed include Marfan's syndrome, supravalvar aortic stenosis and Williams' syndrome, Alagille's syndrome, and hereditary telangiectasia, the Osler-Weber-Rendu syndrome. Genetic causes of hypertrophic cardiomyopathy caused by sarcomeric protein mutations (beta-cardiac myosin heavy chain) and of dilated cardiomyopathy secondary to structural protein deficiencies (dystrophin) are presented. Defects in proteins essential for myocardial energy production such as oxidative phosphorylation proteins and fatty acid oxidation genes that cause cardiomyopathy or sudden death are described. Gene ablation models in mice, such as RXR alpha and homeobox gene knockouts, which result in cardiac phenotypes resembling human congenital heart disease, are described. Familial types of human CHD which are being investigated for genetic causes by positional cloning methods and known cytogenetic causes of CHD, including the CATCH-22 syndrome and monosomy at 22q11, are presented. General lessons and principles derived from these new and exciting discoveries in human cardiovascular development are surmised.