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

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.

journal_name

Acta Pharmacol Sin

authors

Chiu PY,Leung HY,Siu AH,Poon MK,Ko KM

doi

10.1111/j.1745-7254.2007.00614.x

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

1559-65

issue

10

eissn

1671-4083

issn

1745-7254

journal_volume

28

pub_type

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