肝细胞癌热休克蛋白70过表达与自发性癌细胞凋亡

目的探讨肝细胞癌（hepatocellularcarcinoma，HCC)热休克蛋白70（heatshockproteins70，HSP70）的表达及其与自发性癌细胞凋亡的关系。方法采用免疫组化SP法和原位末端转移酶标记法（TUNEL）检测68例HCC手术标本中HSP70表达和细胞凋亡指数，以癌旁肝组织作为对照。结果HCC和癌旁组织中HSP70阳性率分别为71%和28%，过表达分别为53%和21%，两组之间差异有非常显著意义（P＜0.01)，HSP70阳性率和凋亡指数有正相关关系（r＝0.8765，P＜0.05)，两者都随HCC组织学分级增高而增加。结论HCC组织中存在HSP70过表达和自发性癌细胞凋亡，两者正相关性机理尚不明了，可能是HCC生物学恶性行为的标志。

Overexpression of heat shock protein 70 and spontaneous cancer cell apoptosis in hepatocellular carcinoma

Objective: To evaluate the expression of heat shock protein 70 (HSP70) and its relation to spontaneous cancer cell apoptosis in hepatocellular carcinoma (HCC). Methods A series of 68 resected HCC tissues from untreated patients and 68 adjacent normal liver tissues were analyzed for HSP70 expression and apoptosis by immunohistochemical SP and TUNEL methods. Results HSP70 was detected positive in 48/68(71%) cases of HCC and 19/68(28%) cases of the adjacent liver tissues. Overexpression of HSP70 was found in 36/68(53%) cases of HCC and 14/68(21%) cases of the liver tissues. The positive rate and overexpression of HSP70 were significantly higher in HCC than in the liver tissues (P<0.01). Apoptosis index was 8.9 in HCC and 1 .9 in the liver tissues, showing significant different between the two groups (P<0.01). The positive rate of HSP70 was correlated with apoptosis index (r=0.8765, P<0.05) and both of them correlated with HCC histological grades. Conclusions These results suggest that there is an overexpression of HSP70 and spontaneous cancer cell apoptosis in HCC. They seem to be markers of poor proliferation.