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Updated: Jul 17, 2026

Lighting Up the Pathways to Caspase Activation Using Bimolecular Fluorescence Complementation
08:47

Lighting Up the Pathways to Caspase Activation Using Bimolecular Fluorescence Complementation

Published on: March 5, 2018

Apoptosis repressor with caspase recruitment domain (ARC) inhibits myogenic differentiation

Arwen L Hunter1, Jingchun Zhang, Shirley C Chen

  • 1James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, Department of Pathology and Laboratory Medicine, St. Paul's Hospital, University of British Columbia, 1081 Burrard Street, Vancouver, BC, Canada.

FEBS Letters
|February 13, 2007
PubMed

Insights

Apoptosis repressor with caspase recruitment domain (ARC) suppresses muscle cell differentiation by inhibiting caspase activation. This study reveals ARC

Area of Science:

  • Muscle cell biology
  • Apoptosis regulation
  • Cellular differentiation pathways

Background:

  • Apoptosis repressor with caspase recruitment domain (ARC) is an anti-apoptotic protein.
  • ARC is highly expressed in differentiated cardiac and skeletal muscle tissues.
  • Muscle differentiation and apoptosis share common regulatory pathways.

Purpose of the Study:

  • To investigate the role of ARC in H9c2-myoblast differentiation.
  • To determine if ARC influences key markers and processes of myogenic differentiation.

Main Methods:

  • Overexpression of ARC in H9c2-myoblasts.
  • Assessment of differentiation markers (myotube formation, nuclear fusion, myogenin, troponin-T).
  • Analysis of caspase-3 activation during differentiation.

Main Results:

  • ARC expression increases and stabilizes during H9c2-myoblast differentiation.
  • ARC overexpression suppressed differentiation, evidenced by enhanced myotube formation and nuclear fusion.
  • ARC overexpression inhibited caspase-3 activation, a key event in myogenic differentiation.

Conclusions:

  • ARC plays a novel inhibitory role in muscle differentiation.
  • ARC may regulate myogenic differentiation through the inhibition of caspase activity.

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