RESUMO
Objective To investigate the apoptotic effect of the transmembrane form vaccine of human blood group A mimotope on malignant melanoma cell line B16. Methods B16 cells were transfected with different recombinant plasmid through Lipofectamine 2000 and incubated with different concentration of monoclonal anti-A antibody at 2.5 μg/ml, 5 μg/ml,10 μg/ml and 20 μg/ml. Apoptosis rate of cells was determined with Annexin Ⅴ/PI double staining by flow cytometry. Results Apoptosis rate to P/F-M-pIRES group B16 cells was 74.74% when anti-A monoclonal antibody concentration was 10 μg/ml; apoptosis rate of plasmids carrying peptide/Fas fusion gene such as P/F-M-pIRES group and P/F-pIRES group were significantly higher than M-pIRES group and pIRES group. The apoptosis rate was statistically significantly different between different recombinated plasmid groups (F＝669.707,P＜0.01). The apoptosis rate was statistically significantly different between different antibody groups (F＝106.596,P＜0.01). The interaction between recombinated plasmid groups and antibody groups was statistically significant (F＝34.806,P＜0.01). Conclusions The transmembrane form vaccine of human blood group A mimotope could induce B16 cell apoptosis in vitro. This vaccine may be a promising candidate for potential malignant melanoma therapy.