The aorta was not clamped in sham operation group.
假手术组仅松套腹主动脉，不阻断血流。
Results Immunohistochemistry showed the nuclear expression of Ref 1 protein in the normal control group, sham operation group and left cerebral hemisphere.
结果免疫组织化学染色显示，正常对照组、假手术组、左侧大脑半球氧化还原因子1蛋白在细胞核表达；
Rats in all groups except the sham-operation group were ligated of the left main coronary artery to establish model of MI.
除假手术组不结扎冠状动脉外，其他组均采用结扎左冠状动脉主干造成心肌梗死模型。
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