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Congenital heart diseases and their association with the variant distribution features on susceptibility genes

W Su1, P Zhu1, R Wang2

  • 1Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.

Clinical Genetics
|July 19, 2016
PubMed

Insights

Genetic variants in NKX2-5, GATA4, and TBX5 genes are linked to specific congenital heart disease (CHD) subtypes. Understanding these genetic variations can help predict infant CHD risks.

Area of Science:

  • Genetics
  • Cardiology
  • Developmental Biology

Background:

  • Congenital heart disease (CHD) is a major cause of childhood illness and death.
  • Genetic and environmental factors contribute to CHD development.
  • Key genes like NKX2-5, GATA4, and TBX5 are crucial for heart and vessel formation.

Purpose of the Study:

  • To summarize the associations between genetic variants in NKX2-5, GATA4, and TBX5 and specific CHD subtypes.
  • To explore the relationship between variant distribution and clinical phenotypes.
  • To investigate the structural implications of these genetic variations.

Main Methods:

  • Literature review summarizing genetic variant data for NKX2-5, GATA4, and TBX5.
  • Analysis of variant locations within gene domains and exons.
  • Structure-modelling to assess DNA-binding ability and stability of mutated residues.

Main Results:

  • NKX2-5 variants in the tinman and homeodomains are linked to atrial septal defects (ASD) and atrioventricular (AV) block.
  • GATA4 variants at terminal ends are associated with ventricular septal defects (VSD).
  • TBX5 variants in specific exons (3, 4, 5, 7) strongly correlate with Holt-Oram syndrome (HOS).
  • Mutated residues retain DNA-binding ability and structural stability.

Conclusions:

  • Variant distribution in NKX2-5, GATA4, and TBX5 is tightly linked to particular CHD subtypes.
  • Structural integrity of these genes is maintained despite mutations.
  • Gene structure analysis may aid in predicting high-risk infants for specific CHD subtypes.

Keywords:
GATA4NKX2-5TBX5congenital heart diseasegene variantmutation

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