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CIRBP protects H9C2 cells against myocardial ischemia through inhibition of NF-κB pathway

T Y Long1, R Jing1, F Kuang2

  • 1Cardiovascular Department, The Xiangya Hospital of Central South University, Changsha City, Hunan Province, China.

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Medicas E Biologicas
|March 30, 2017
PubMed

Insights

Cold inducible RNA-binding protein (CIRBP) protects against myocardial ischemia by inhibiting the NF-κB pathway. Overexpressing CIRBP enhances cell viability and reduces apoptosis and reactive oxygen species (ROS) in ischemic conditions.

Area of Science:

  • Cardiology
  • Molecular Biology
  • Cell Biology

Background:

  • Myocardial ischemia is a leading cause of mortality with limited therapeutic options.
  • Cold inducible RNA-binding protein (CIRBP) is implicated in various pathological processes, including myocardial ischemia.
  • The precise molecular mechanisms underlying myocardial ischemia require further elucidation.

Purpose of the Study:

  • To investigate the role and molecular mechanisms of Cold inducible RNA-binding protein (CIRBP) in myocardial ischemia.
  • To determine if CIRBP can protect against myocardial ischemia in a cellular model.

Main Methods:

  • Overexpression and silencing of CIRBP in H9C2 cells.
  • Construction of a H9C2 cell model of myocardial ischemia using serum-free medium and hypoxia.
  • Assessment of cell viability (AlamarBlue assay), reactive oxygen species (ROS) levels, apoptosis (flow cytometry), and protein expression (Western blot) of IκBα, p65, and Bcl-3.

Main Results:

  • CIRBP overexpression significantly increased cell proliferation and Bcl-3 expression while inhibiting apoptosis and reducing ROS levels.
  • CIRBP overexpression also down-regulated phosphorylated levels of IκBα and p65, indicating NF-κB pathway inhibition.
  • CIRBP knockdown produced opposite effects, confirming its protective role.

Conclusions:

  • Cold inducible RNA-binding protein (CIRBP) demonstrates a protective effect against myocardial ischemia in H9C2 cells.
  • CIRBP exerts its protective function by inhibiting the NF-κB signaling pathway.
  • These findings suggest CIRBP as a potential therapeutic target for myocardial ischemia.

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