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Tetralogy of Fallot and Hypoplastic Left Heart Syndrome - Complex Clinical Phenotypes Meet Complex Genetic Networks

Harald Lahm1, Patric Schön2, Stefanie Doppler1

  • 1Department of Cardiovascular Surgery, Division of Experimental Surgery, German Heart Center Munich, Technische Universität München, Munich Heart Alliance, D-80636 Munich, Germany;

Current Genomics
|June 13, 2015
PubMed

Insights

Congenital heart disease (CHD) has complex genetic origins, often involving multiple genes. Research is exploring genome-wide data to uncover genetic links to severe forms like hypoplastic left heart syndrome (HLHS) and tetralogy of Fallot (TOF).

Area of Science:

  • Cardiovascular Genetics
  • Developmental Biology
  • Genomics

Background:

  • Congenital heart disease (CHD) presents as complex phenotypes with diverse cardiac malformations.
  • Severe forms include hypoplastic left heart syndrome (HLHS) and tetralogy of Fallot (TOF).
  • The genetic basis of most CHD cases remains largely unknown, suggesting polygenic origins.

Purpose of the Study:

  • To summarize the genetic underpinnings of CHD, focusing on HLHS and TOF.
  • To review current literature on identified genetic alterations associated with these conditions.
  • To explore the potential for multifaceted polygenic origins in CHD.

Main Methods:

  • Genome-wide association studies (GWAS) for single nucleotide polymorphisms (SNPs).
  • Whole exome sequencing (WES) to identify de novo mutations.
  • Analysis of copy number variants (CNVs), transcriptome dysregulation, and epigenetic variations.

Main Results:

  • Complex genetic interactions, not single genes, are implicated in CHD.
  • Genome-wide approaches are crucial for identifying genetic predispositions.
  • Specific genetic alterations linked to TOF and HLHS are being identified.

Conclusions:

  • CHD likely arises from complex polygenic interactions.
  • Advanced genomic technologies are essential for understanding CHD etiology.
  • Further research into genetic factors is critical for diagnosing and treating CHD.

Keywords:
Congenital heart diseaseCopy number variantsEpigeneticsGenome-wide association studyHypoplastic left heart syndromeTetralogy of Fallot.de novo mutations

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