Abstract:
:To study the protective effect of mitochondrial ATP-sensitive K(+) channel (mitoK(ATP) channel) opener, nicorandil, combined with Na(+)/Ca(2+) exchange blocker KB-R7943 on myocardial ischemia-reperfusion injury in isolated rat hearts; the isolated rat heart was perfused by modified Langendorff device, after 15-min balanced perfusion, 45-min ischemia (about left and right coronary perfusion flow reduced to 5% of the original irrigation flow), and 2-h reperfusion were performed. Forty Wistar rats were randomly divided into four groups: control group, nicorandil group, KB-R7943 group, and the combination of nicorandil and KB-R7943 group. After 45-min ischemia and then 2-h reperfusion, the myocardial infarct size was 34.31% in control group, 26.35% in nicorandil group, 28.74% in KB-R7943 group, and 19.23% in combination of nicorandil and KB-R7943 group. SOD activity in coronary perfusion fluid was the highest in the combination of nicorandil and KB-R7943 group, and MDA content was the lowest. In the combination drug group compared with the control group, myocardial ultrastructural injury was significantly reduced. The combination of nicorandil and KB-R7943 significantly reduced myocardial infarct size, significantly reduced myocardial ultrastructural damage, could increase coronary perfusion fluid SOD activity, and reduced MDA levels.
journal_name
Cell Biochem Biophysjournal_title
Cell biochemistry and biophysicsauthors
Jia Ddoi
10.1007/s12013-010-9142-8subject
Has Abstractpub_date
2011-07-01 00:00:00pages
219-24issue
3eissn
1085-9195issn
1559-0283journal_volume
60pub_type
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