0.864, P

Objective To study the effect of an immuno-targeted therapy drug Herceptin on apoptosis and cell cycle of overexpressing HER2 breast cancer cells.Methods Breast cancer cell line SKBR-3 was treated with Herceptin at most effective dosage and exposure time were selected by MTT assay.Then the apoptotic features,the apoptotic rate and the change of cell cycle of breast cancer cells were detected by fluorescent microscope(FM),laser confocal microscope(LCM),scanning electron microscope(SEM),transmission electron microscope(TEM)and flow cytometry(FCM).Results With the treatment of Herceptin,the visible apoptosis features of SKBR-3 cells were observed by FM,LCM,SEM and TEM.Compared to the control cell group,the rate of initial apoptotic cells detected by FCM with Annexin V/PI staining increased significantly(P

Objective To investigate the relations between p53 and K-ras gene mutation in portal venous blood of gastric carcinoma patients and cancer metastasis. Methods p53 and K-ras gene mutation was detected with PCR-SSCP technology in 62 cases of gastric carcinoma. Results p53 and K-ras mutation rate were 39% and 34% in portal venous blood, but only 8% and 4. 8% in peripheral blood; The rate of gene mutation in p53 and K-ras were 24% and 22% in patient without liver metastasis, 92% and 77% in patient with liver metastasis; The rate of gene mutation in p53 and K-ras in portal venous were 39% and 34% before surgical exploration, but 56% and 63% after exploration. The rate of positive detection of the mutation was significantly (P