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C/EBPβ knockdown protects cardiomyocytes from hypertrophy via inhibition of p65-NFκB

Jian Zou1, Hong Li2, Xi Chen3

  • 1Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China; Department of Pharmacy, Chengdu Fifth People's Hospital, Chengdu 611130, China.

Molecular and Cellular Endocrinology
|April 8, 2014
PubMed

Insights

CCAAT enhancer-binding protein beta (C/EBPβ) promotes cardiac hypertrophy by activating NFκB signaling. Inhibiting C/EBPβ protects cardiomyocytes, suggesting C/EBPβ as a therapeutic target for cardiac hypertrophy.

Area of Science:

  • Cardiovascular Biology
  • Molecular Cardiology
  • Gene Regulation

Background:

  • CCAAT enhancer-binding protein beta (C/EBPβ), a transcription factor, is implicated in physiological cardiac hypertrophy.
  • The specific role of C/EBPβ in pathological cardiac hypertrophy is not well understood.

Purpose of the Study:

  • To investigate the involvement of C/EBPβ in pathological cardiac hypertrophy.
  • To elucidate the molecular mechanisms by which C/EBPβ influences cardiac hypertrophy.

Main Methods:

  • Assessing C/EBPβ expression in response to hypertrophic stimuli in vitro and in vivo.
  • Utilizing C/EBPβ knockdown models to evaluate its effect on phenylephrine (PE)-induced cardiac hypertrophy.
  • Examining the impact of C/EBPβ knockdown on p65-NFκB nuclear translocation and DNA binding activity.

Main Results:

  • C/EBPβ expression significantly increased under hypertrophic stimulation.
  • C/EBPβ knockdown attenuated PE-induced cardiac hypertrophy in cardiomyocytes.
  • Knockdown of C/EBPβ reduced the nuclear translocation and DNA binding activity of p65-NFκB.

Conclusions:

  • C/EBPβ plays a crucial role in pathological cardiac hypertrophy.
  • C/EBPβ inhibition protects cardiomyocytes from hypertrophy, potentially via suppressing NFκB-dependent pathways.
  • C/EBPβ emerges as a potential therapeutic target for treating cardiac hypertrophy and C/EBPβ-related cardiomyopathy.

Keywords:
C/EBPβCardiac hypertrophyp65-NFκB

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