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Indexed/Abstracted in: BIOSIS Previews, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,632
Online ISSN 1827-191X
Usta E., Mustafi M., Walker T., Ziemer G.
Department of Cardiac and Vascular Surgery, University Hospital Tübingen, Tübingen, Germany
AIM: After cardioplegia and subsequent reperfusion of the myocardium as employed in cardiac surgery, ischemia/reperfusion injury of the myocardium can induce apoptosis. The aim of this study was to evaluate the anti-apoptotic properties of resveratrol, a phenolic phytoalexin present in grape skins and especially red wines during simulated cardioplegia (cp) and reperfusion (rep) in an in-vitro microperfusion model on human myocardium, which to our knowledge has not been investigated yet.
METHODS: Cardiac specimens were retrieved from the right auricle of patients undergoing elective coronary artery bypass graft before induction of cardiopulmonary bypass. Cardiac specimens, with resveratrol (10 µM) (N.=15) and w/o resveratrol (control, N.=15) were exposed in vitro to varying periods of cp/rep (30/10, 60/20, 120/40 min) in a microperfusion chamber. For detection of apoptosis anti-activated-caspase-3, PARP-1 cleavage immunostaining and real-time PCR for gene expression of cardiac cytokines like BNP, NF-κB1, NF-κB2, E-Selectin, Troponin and TNF-α were employed.
RESULTS: Control group: the longer the cp/rep period lasted the higher were the rate of anti-activated-caspase-3 positive cardiomyocytes (21.26±2.07% ‑ 46.56±3.2%) and of PARP1-cleavage positive cardiomyocytes (23.29±2.16% ‑ 36.86±2.11%). Resveratrol group: apoptosis was suppressed significantly (P<0.05). Anti-activated-caspase-3 positive cardiomyocytes (13.45±4.35% ‑ 15.3±2.97%) and PARP1-cleavage positive cardiomyocytes (9.87±2.04% ‑ 11.77±3.42%). Resveratrol significantly suppressed the expression of BNP, NF-κB2, E-Selectin, Troponin and TNF-α in vitro (P<0.05).
CONCLUSION: Resveratrol significantly suppresses apoptosis under our applied in vitro conditions. This finding warrants further studies aiming suppression of ischemia/reperfusion injury in clinical settings.