Genetic Insights into Congenital Heart Disease

Summary

Congenital heart disease (CHD) encompasses a diverse group of structural and functional cardiac malformations present at birth, affecting around 1 % of live births worldwide. Advances in genomic technologies have revealed that CHD often arises from a complex interplay of genetic variants, ranging from single‐nucleotide changes in transcription factors and structural proteins to larger copy number variants and oligogenic contributions. Both de novo mutations and inherited alleles can perturb essential developmental pathways, including those governing cardiomyocyte differentiation, contractile apparatus assembly and left–right patterning of the heart. Recent work has underscored the importance of chromatin remodellers, cilia-related molecules and mitochondrial components in the aetiology of specific subtypes such as hypoplastic left heart syndrome and laterality defects. Improved molecular diagnoses not only inform risk stratification and family counselling but also point towards novel therapeutic avenues, from gene-aware surgical planning to targeted modulation of disrupted pathways.

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Genetic Insights into Congenital Heart Disease publication trend

The graph below shows the total number of articles in genetic insights into congenital heart disease across all publications each year (not limited to Nature Index journals).

Technical terms

Congenital heart disease (CHD): A group of structural and functional cardiac anomalies present at birth.

Whole exome sequencing (WES): A genomic technique that sequences all protein-coding regions to detect variants.

Recessive genotype: A pair of pathogenic alleles inherited from each parent, requiring both to manifest disease.

Copy number variant (CNV): A structural alteration resulting in the deletion or duplication of genomic segments.

Oligogenic inheritance: A genetic model in which variants in multiple genes act together to produce a phenotype.

Single-cell transcriptomics: Profiling gene expression at individual cell resolution to reveal cell-type-specific activity.

Mitochondrial MICOS complex: A protein assembly that maintains inner mitochondrial membrane structure and supports energy production.

References

  1. Recessive genetic contribution to congenital heart disease in 5,424 probands. Proceedings of the National Academy of Sciences of the United States of America (2025).
  2. Mitochondrial MICOS complex genes, implicated in hypoplastic left heart syndrome, maintain cardiac contractility and actomyosin integrity. eLife (2023).
  3. Rare Copy Number Variations in Adults with Tetralogy of Fallot Implicate Novel Risk Gene Pathways. PLOS Genetics (2012).
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