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Abstract Title:

Schisandrin B decreases the sensitivity of mitochondria to calcium ion-induced permeability transition and protects against ischemia-reperfusion injury in rat hearts.

Abstract Source:

Acta Pharmacol Sin. 2007 Oct;28(10):1559-65. PMID: 17883940

Abstract Author(s):

Po-Yee Chiu, Hoi-Yan Leung, Ada Hl Siu, Michel Kt Poon, Kam-Ming Ko

Abstract:

Aim: In order to elucidate the molecular mechanism underlying the cardioprotection afforded by schisandrin B (Sch B), the effect of Sch B treatment on the sensitivity of mitochondria to Ca2+-stimulated permeability transition (PT) was investigated in rat hearts under normal and ischemia-reperfusion (I-R) conditions. Results: Myocardial I-R injury caused an increase in the sensitivity of mitochondria to Ca2+-stimulated PT in vitro. The enhanced sensitivity to mitochondrial PT was associated with increases in mitochondrial Ca2+ content as well as the extent of reactive oxidant species production in vitro and cytochrome c release in vivo. The cardioprotection afforded by Sch B pretreatment against I-R-induced injury was paralleled by the decrease in the sensitivity of myocardial mitochondria to Ca2+-stimulated PT, particularly under I-R conditions. Conclusion: The results suggest that Sch B treatment increases the resistance of myocardial mitochondria to Ca2+-stimulated PT and protects against I-R-induced tissue injury.

Study Type : In Vitro Study

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Sayer Ji
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