Objective:To observe the effect of electroacupuncture(EA)pretreatment on the protein expression of c-fos in fastigial nucleus(FN)and lateral hypothalamus area(LHA)in rats with acute myocardial ischemia-reperfusion injury(MIRI),and to explore the role and mechanism of FN and LHA in EA at the Heart Meridian fighting against acute MIRI reaction.Methods:Seventy Sprague-Dawley rats were randomly divided into a sham operation group,a model group,an EA-Heart Meridian group and an EA-Lung Meridian group,with 14 rats in each group;an LHA lesion plus EA-Heart Meridian group(LHA+EA-Heart Meridian group)and a FN lesion plus EA-Heart Meridian group(FN+EA-Heart Meridian group),with 7 rats in each group.Except the sham operation group,the left anterior descending branch of coronary artery was ligated to establish acute MIRI rat models in the other 5 groups.In the three groups with EA-Heart Meridian treatment,Shenmen(HT 7)and Tongli(HT 5)were selected;Taiyuan(LU 9)and Lieque(LU 7)were selected in the EA-Lung Meridian group.All the EA groups received EA stimulation prior to modeling,with 1 mA in current intensity and 2 Hz in frequency,20 min each time,once a day for a total of 7 d.The sham operation group and the model group did not receive EA stimulation.The electrocardiogram was observed in the rats to analyze the ST-segment deviation and cardiac arrhythmia score.The expression of c-fos protein in FN and LHA was detected by immunohistochemistry method.Results:Compared with the sham operation group,the ST-segment deviation,cardiac arrhythmia score and the expression of c-fos protein in the FN and LHA increased significantly in the model group(all P<0.05).Compared with the model group,the ST-segment deviation,cardiac arrhythmia score and the expression of c-fos protein in FN and LHA decreased significantly in the EA-Heart Meridian group(all P<0.05).Compared with the EA-Heart Meridian group,the ST-segment deviation and cardiac arrhythmia score increased significantly in the EA-Lung Meridian group,LHA+EA-Heart Meridian group and FN
Cai Rong-linShao Xue-fangYu QingZhang Ya-tingWei Xiao-tongHu Ling