肝动脉缺血对犬肝细胞损害的实验研究

摘要：目的:探讨肝动脉缺血对犬肝细胞的损害。方法:对２０只犬进行肝动脉阻断，不阻断门静脉，分别于阻断前、阻断后２０，４０，６０min取肝组织进行活检，用常规ＨＥ染色和ＢＣＬ-２免疫组化染色并进行灰度测定。结果:肝动脉阻断２０min，肝细胞已有明显损害，阻断６０min有不可逆性严重损害，ＢＣＬ-２免疫组化灰度测定，阻断前与阻断后各时点差异均有高度显著性（P<0.0001），其中２０min和４０min与６０min之间差异有高度显著性(P<0.001)。结论:肝动脉阻断20min，肝细胞有明显损害，肝动脉阻断60 min，肝细胞有不可逆性损害。

Study of hepatic cellular injury due to hepatic ischemia in dogs

Objective To investigate the ischemic injury of hepatic cell caused by hepatic artery occlusion.Methods The hepatic artery was occluded in 20 dogs via operation,while the portal vein remained patent.Specimens were gained from the right liver at four time points:before occlusion of the hepatic artery,20(minutes),40 minutes and 60 minutes after artery occlusion.Each specimen was examined by HE and BCL-2 by immunohistochemistry.The gray scale of BCL-2 in HE sections was detected.Results Hepatic cellular injury was obvious 20 minutes after occlusion of the hepatic artery.Irreversible hepatic cellular injury was(observed) 60 minutes after hepatic artery occlusion.The results showed that the gray scale of BCL-2 at every time point after hepatic artery occlusion were significantly different from that before hepatic artery occlusion(P<0.0001).Besides,the hepatic cell injury and BCL-2 expression at 20 minutes and 40minutes after(occlusion) was significantly different from that of 60 minutes(P<0.0001),respectively.Conclusions There was obvious hepatic cellular injury 20 minutes after hepatic artery occlusion,and irreversible hepatic cellular injury occured 60 minutes after hepatic artery occlusion.