Chelerythrine treatment influences the balance of pro- and anti-apoptotic signaling pathways in the remote myocardium after infarction
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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 language | English |
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Pages (from-to) | 119-128 |
Number of pages | 10 |
Journal | Molecular and cellular biochemistry |
Volume | 310 |
Issue number | 1-2 |
Publication status | Published - Mar 2008 |
Peer-reviewed | Yes |
External IDs
PubMed | 18060473 |
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Keywords
ASJC Scopus subject areas
Keywords
- Apoptosis, Infarction, Protein kinase C, Remodeling