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Isolation and Kv Channel Recordings in Murine Atrial and Ventricular Cardiomyocytes
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Cardiac connexins, mutations and arrhythmias

Mario Delmar1, Naomasa Makita

  • 1The Leon H Charney Division of Cardiology, New York University School of Medicine, New York, New York 10016, USA. Mario.Delmar@nyumc.org

Current Opinion in Cardiology
|March 3, 2012
PubMed
Abstract

Insights

Genetic mutations in cardiac connexins (Cx40 and Cx43) are linked to inherited cardiac arrhythmias. Further research is needed to explore these associations and their clinical implications.

Area of Science:

  • Molecular Cardiology
  • Genetics of Cardiac Arrhythmias
  • Ion Channel Biology

Background:

  • Connexins form gap junction channels crucial for cardiac electrical activity.
  • Pathological conditions like hypertrophy and ischemia alter connexin expression.
  • The link between connexin gene variations and arrhythmias is not well understood.

Purpose of the Study:

  • To review current knowledge on the association between cardiac connexins and inherited arrhythmias.
  • To explore the role of nucleotide substitutions in connexin genes (GJA5, GJA1) in cardiac arrhythmias.

Main Methods:

  • Literature review of recent studies.
  • Analysis of reported associations between genetic variations and arrhythmias.

Main Results:

  • Nucleotide substitutions in connexin40 (Cx40) and connexin43 (Cx43) genes are associated with cardiac arrhythmias.
  • Germline mutations in Cx43 are linked to oculodentodigital dysplasia, typically without cardiac involvement.

Conclusions:

  • Cardiac connexins play a role in inherited arrhythmias.
  • Further investigation into connexin gene variations and their contribution to arrhythmogenesis is warranted.

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