[Protective effect of trimetazidine on rabbit myocardium during ischemia-  reperfusion].
To investigate the protective effects of trimetazidine on rabbit myocardium in ischemia and reperfusion.



Fourty rabbits were divided into five groups randomly: normal control group, ischemia control group, ischemia and drug intervention group, reperfusion control group, reperfusion and drug intervention group. Ischemia lasted for 30 minutes and reperfusion was given for 30 minutes. Serum CPK, SOD activities and MDA concentrations were measured in each group and ischemia tissue ATP concentrations were also measured. Heart tissue was examined with electron microscope in each group.



(1) Serum concentrations of MDA in ischemia and drug intervention group were significantly different from those in ischemia control group [(4.09+/-0.40 vs 4.79+/-0.92)nmol/ml, P<0.01], serum activities of CPK [(1322+/-1148 vs 1498+/-190) NU/ml], SOD[(324+/-71 vs 288+/-54)NU/ml] were not significantly different between ischemia and drug intervene group and ischemic control group (PP>0.05,respectively). (2) Serum activities of CPK [(1512+/-226 vs 1904+/-203) NU/ml], SOD[(213+/-71 vs 119+/-55) NU/ml], concentrations of MDA [(6.09+/-0.69 vs 7.43+/-0.20)nmol/ml] and concentrations of ATP[(1.401+/-0.248 vs 0.629+/-0.175) micromol/g] in ischemia heart tissue of reperfusion and drug intervention group were significantly different from those in reperfusion control group (P<0.001 - 0.01 respectively). (3) There were significant differences in electron microscopic observation between intervention group and control group.



Trimetazidine can improve cardiac mitochondrial metabolism and scavenge oxygen free radicals. Trimetazidine has cardioprotective function during ischemia and reperfusion.
Wang
Jian
J
The First Affiliated Hospital, College of Medical Sciences, Zhejiang University, Hangzhou 310003, China.
Huang
Yuan-wei
YW
Wei
Jing-han
JH
Wei
Tai-xing
TX
Dong
Jian-zeng
JZ
Zhang
Jin-ying
JY
D000255:Adenosine Triphosphate / Q000032:analysis; D000818:Animals; D003402:Creatine Kinase / Q000097:blood; D005260:Female; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D008929:Mitochondria, Heart / Q000187:drug effects / Q000648:ultrastructure; D015428:Myocardial Reperfusion Injury / Q000517:prevention & control*; D020011:Protective Agents / Q000494:pharmacology; D011817:Rabbits; D013482:Superoxide Dismutase / Q000097:blood; D014292:Trimetazidine / Q000494:pharmacology*
D020011:Protective Agents; D008315:Malondialdehyde; D000255:Adenosine Triphosphate; D013482:Superoxide Dismutase; D003402:Creatine Kinase; D014292:Trimetazidine