[Preparation of monoclonal antibodies against oh(8)dG and their biological characteristics].

OBJECTIVE: To prepare monoclonal antibodies against oh(8)dG and to evaluate the relationship between Hp infection and oxidative DNA damage by detecting oh8dG in gastric mucosa. METHODS: BALB/C mice were immunized with BSA-oh(8)dG conjugate, monoclonal antibodies were prepared by hybridoma technique, the biological characteristics of antibodies were analysed by competitive ELISA, Western blot and immunohistochemistry. RESULTS: Two strains of hybridoma cell were obtained. ELISA and Western blot indicated that the antibodies were fairly specific for oh(8)dG. In immunohistochemistry,the positive rate of oh(8)dG expression in Hp positive tissues and Hp negative tissues was 55% and 5%, respectively(P<0.01). CONCLUSION: The prepared antibodies can specially recognize oh(8)dG and immunohistochemistry with the monoclonal antibodies showed Hp infection can increase oh(8)dG level in gastric mucosa.