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Insights into the genetic architecture underlying complex, critical congenital heart disease

Gillian M Blue1, Eddie K K Ip2, Michael Troup2

  • 1Heart Centre for Children, The Children's Hospital at Westmead, Sydney, Australia; Sydney Medical School, The University of Sydney, Sydney, Australia.

American Heart Journal
|September 17, 2022
PubMed

Insights

Complex congenital heart disease (CHD) involves a higher genetic burden from common variations in CHD genes. Environmental factors and regulatory genes also influence disease presentation and severity.

Area of Science:

  • Genetics
  • Cardiology
  • Developmental Biology

Background:

  • Congenital heart disease (CHD) presents with multifactorial causes, suggesting a genetic component.
  • Variable disease severity and incomplete penetrance are observed in CHD, hinting at complex genetic and environmental interactions.

Discussion:

  • Whole genome sequencing (WGS) distinguishes complex, critical CHD from other forms by identifying an increased genetic burden in common variations.
  • This genetic burden is particularly noted within established CHD genes.
  • Findings suggest a role for regulatory genes and environmental stressors in the final manifestation of CHD.

Key Insights:

  • Complex critical CHD exhibits a distinct genetic profile characterized by a higher burden of common genetic variations in known CHD genes.
  • Regulatory genes and environmental factors are associated with the presentation and severity of CHD.
  • WGS is a powerful tool for dissecting the genetic underpinnings of complex congenital diseases.

Outlook:

  • Further research into the interplay between genetic predisposition and environmental triggers in CHD is warranted.
  • Identifying specific regulatory genes and environmental stressors could lead to novel diagnostic and therapeutic strategies.
  • Understanding the genetic burden in CHD can inform personalized risk assessment and management.

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