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CDR1as modulates arrhythmia post-myocardial infarction via regulating Cav1.2

Jiapan Wang1, Wenjie Liao1, Xingda Li1

  • 1Institute of Clinical Pharmacy of the Second Affiliated Hospital of Harbin Medical University, State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD), Harbin 150001, China.

Acta Biochimica Et Biophysica Sinica
|July 30, 2025
PubMed

Insights

Targeting CDR1as may prevent heart arrhythmias after myocardial infarction (MI). Reducing CDR1as expression restored calcium channel function and improved cardiac performance in mouse models of MI.

Area of Science:

  • Cardiovascular Research
  • Molecular Cardiology
  • Electrophysiology

Background:

  • Ventricular arrhythmias (VAs) are a major cause of death post-myocardial infarction (MI).
  • Electrophysiological disorders are typically responsible for these arrhythmias.
  • Previous studies linked CDR1as to Nav1.5 and Kir6.2 channel modulation in ameliorating post-MI arrhythmias.

Purpose of the Study:

  • To investigate the role of CDR1as in calcium channel remodeling following ischemic arrhythmia.
  • To explore CDR1as as a potential therapeutic target for antiarrhythmic strategies post-MI.

Main Methods:

  • Myocardial infarction (MI) induced in mice via left anterior descending coronary artery (LAD) ligation.
  • Patch-clamp electrophysiology used to measure calcium current (ICaL) in isolated ventricular cardiomyocytes.
  • Adeno-associated virus serotype 9 (AAV9) carrying CDR1as-shRNA used for gene knockdown.

Main Results:

  • Cav1.2 expression was significantly decreased in the infarct border zone at 12 hours post-MI.
  • CDR1as knockdown enhanced cardiac function in MI mice.
  • ICaL density and Cav1.2 expression were restored in MI mice following CDR1as knockdown.

Conclusions:

  • CDR1as plays a role in calcium channel remodeling after MI-induced ischemia.
  • Modulating the CDR1as pathway can restore ICaL density and Cav1.2 expression.
  • Targeting CDR1as represents a potential antiarrhythmic therapy strategy for myocardial infarction.

Keywords:
CDR1asCav1.2myocardial infarctionventricular arrhythmia

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