Chelerythrine treatment influences the balance of pro- and anti-apoptotic signaling pathways in the remote myocardium after infarction

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Gregor Simonis - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Stephan Wiedemann - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Kerstin Schwarz - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Torsten Christ - , Institute of Pharmacology and Toxicology (Author)
  • Daniel G. Sedding - , Justus Liebig University Giessen (Author)
  • Xinjian Yu - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Rainer Marquetant - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Ruediger C. Braun-Dullaeus - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)
  • Ursula Ravens - , Institute of Pharmacology and Toxicology (Author)
  • Ruth H. Strasser - , Medical clinic with a focus on cardiology (at the Heart Center) (Author)

Abstract

Objective: Apoptotic processes may be implicated in the molecular pathomechanisms of ventricular remodeling after myocardial infarction (MI). The modulation of apoptosis by pro- and anti-apoptotic pathways in the myocardium remote from the infarction, including its link to protein kinase C (PKC), was focus of the present study. Methods: Rats were subjected to MI by LAD ligation in situ. Some animals were pretreated with the PKC inhibitor chelerythrine. After 1 h up to 28 days, pro- and anti-apoptotic signals (caspase-3, Bcl-2/Bax ratio, Akt, Bad), and marker of apoptosis execution (DNA laddering, TUNEL) were quantified in the myocardium remote from the infarction. Results: Activation of caspase-3, a pro-apoptotic shift of the Bcl-2/Bax ratio, and DNA fragmentation were observed as early as 3 h after infarction and persisted up to 28 days. Akt- and Bad-phosphorylation was unchanged. Chelerythrine markedly reduced DNA fragmentation. Caspase-3 activation was unchanged. Surprisingly, Bad and Akt phosphorylation were highly increased (180% and 750% of control). Conclusion: Chelerythrine influences the balance of pro- and anti-apoptotic pathways in the remote myocardium after infarction, with an inhibition of proapoptotic and an activation of anti-apoptotic signals.

Details

Original languageEnglish
Pages (from-to)119-128
Number of pages10
JournalMolecular and cellular biochemistry
Volume310
Issue number1-2
Publication statusPublished - Mar 2008
Peer-reviewedYes

External IDs

PubMed 18060473

Keywords

Keywords

  • Apoptosis, Infarction, Protein kinase C, Remodeling