To study the expression of androgen receptor (AR) in the cases of sudden death caused by coronary heart disease (CHD) and relationship between AR and sudden coronary death (SCD) to explore the mechanism of the development of coronary atherosclerosis and provide references for the prevent and treatment of CHD and medicolegal identification of SCD. 53 cases selected from the autopsied cases in our department from 2011 to 2012 were divided into 3 groups: 18 case of SCD, including 11 males and 7 females, as experimental group, another 18 cases, including 11 males and 7 females, with CHD but died of mechanical injuries and poisoning as control group I, and 17 cases without CHD who also died of mechanical injuries and poisoning including 10 males and 7 females, as control group II. After HE-stained and immunohistochemistry-stained (SP) for the slices, the expression of AR in coronary arteries were observed and the average optical density (AOD) of positive signal in each case were detected by using Image-Pro Plus 6.0 software. We found strongly positive expression of AR in control group II, weakly positive expression in control group I and a little weaker in the experimental group. The expression of AR in coronary artery was reduced in CHD patients, which suggested that androgen may have favorable effects on the cardiovascular system.
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