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Related Experiment Videos

Genetic mechanisms controlling cardiovascular development.

Jamie Bentham1, Shoumo Bhattacharya

  • 1Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX37BN, UK.

Annals of the New York Academy of Sciences
|April 1, 2008
PubMed
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Genetic factors in congenital heart disease (CHD) are complex. Research explores rare variants and genetic buffering pathways to understand sporadic CHD and inform future prevention strategies.

Area of Science:

  • Genetics
  • Developmental Biology
  • Cardiology

Background:

  • Congenital heart disease (CHD) is a leading cause of death in children, affecting approximately 1 in 145 live births.
  • While Mendelian and chromosomal syndromes explain 20% of CHD cases, the genetic basis of the remaining 80% (sporadic CHD) remains largely unknown.
  • Sporadic CHD is likely influenced by rare genetic variants in cardiac developmental genes, copy number variations, and common variants affecting genetic buffering pathways like folate metabolism.

Purpose of the Study:

  • To investigate the genetic architecture of sporadic congenital heart disease.
  • To identify candidate genes involved in cardiac development using mouse models.
  • To explore mechanisms of genetic buffering relevant to CHD prevention.

Main Methods:

Related Experiment Videos

  • Utilized high-throughput magnetic resonance imaging of mouse embryos.
  • Employed N-ethyl-N-nitrosourea/transposon mutagenesis and knockout techniques in mouse models.
  • Sequenced candidate genes essential for mouse heart development.

    • Main Results:

    • Identified numerous candidate genes (potentially >1700) crucial for cardiac development in mice.
    • Characterized the genetic complexity of sporadic CHD, including rare variants and buffering pathways.
    • Highlighted challenges in genome-wide association studies due to allelic heterogeneity in CHD.

    Conclusions:

    • Mouse models provide a valuable complementary approach to studying human CHD genetics.
    • Understanding genetic buffering mechanisms is critical for developing novel CHD prevention strategies.
    • Future research aims to translate mouse model discoveries to human CHD and enhance genetic buffering, similar to folate's role in preventing neural tube defects.