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Objective To investigate the expression of Bmi-1,Mdm2 and Ki-67 in extrahepatic biliary duct carcinoma and to evaluate their clinical significance. Methods The expression of Bmi-1.Mdm2 and Ki-67 was detected in 10 normal extrahepatic biliary duct tissue and 30 cases of extrahepatic billary duct carcinoma with immunohistochemic0al staining and the their clinical significance were analyzed. Results No POsitlVe Bmi-1 expression was found in 10 normal extrahepatie biliary duct cages, while 18 of 30 extrahepatic biliary duct carcinoma cases showed positive Bim-1 expression.The expression of Bmi-I in extrahepatic biliary duct carcinoma(60.0%)was statistically higher than that in normal extrahepatie biliary duct(P<0.05).The positive expression rate of Mdm2 in extrahepatic biliary duct carcinoma was significantly higher than that in normal extrahepatic biliary duct (56.7%vs 20.0%,P<0.05).The cases of extrahepatic biliary duct carcinoma with Ki-67 proliferation index higher than 5%reached 60.0%,while the Ki-67 index was all lower than 1%in 10 normal extrahepatic biliary duct tissue, suggesting the higher proliferating activity of extrahepatic biliary duct carcinoma.No differences were found in the expressions of Bmi-1,Mdm2 and Ki-67 among extrahepatic biliary duct carcinoma cases with different clinical pathological features. Conclusion The results indicate that the expression of Bmi-1 and Mdm2 up-regulation may play an important role in carcinogenesis of extrahepatic biliary duct caroinoma. No clinical significances of the expressions of Bmi-1,Mdm2 and Ki-67 are found in extrahepatic biliary duct carcinomas.
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Objective To investigate the expression and relationship of TIP30(HIV-1 Tat interactive protein 2), vascular endothelial growth factor (VEGF) and MVD (detected by CD34) in the angiogenesis of human brain astrocytomas. Methods Expression of TIP30, VEGF and CD34 in 19 cases of normal brain tissue and 71 cases of astrocytoma were immunohistochemically examined with Elivision plus two-step method. Results The positive expression of TIP30 could be seen in cytoplasm of neuroglial cells and neurons of 19 normal brain tissues. The positive expression rate of TIP30 in 71 cases of astrocytoma was 33.80 % (24/ 71). The positive expression rate of TIP30 in astrocytoma of different grades was 52 % for grade Ⅱ, 34.78 % for grade Ⅲ and 13.04 % for grade Ⅳ. The positive expression rate of TIP30 in high grade (Ⅲ+Ⅳ) of astrocytoma was found significantly lower than that in low grade(Ⅱ) (χ2=5.71, P <0.05); The expression of VEGF and MVD detected by CD34 in astrocytomas were higher than that in normal brain tissue and increased as the tumor grade increased; In astrocytoma, the negtive correlation was found between the expression of TIP30 and VEGF (r=-0.428, P<0.05); no correlation was found between TIP30 and MVD(r=-0.065, P 0.05); the positive correlation was found between VEGF and MVD(r=0.684, P<0.01). Conclusion The positive expression rate of TIP30 in normal brain tissue is significantly higher than that in astrocytoma. The positive expression rate of TIP30 significantly decreases as the pathological grade of the astrocytoma increases; The expression of TIP30 and VEGF is negatively correlated in astrocytoma.