[Preparation of the monoclonal antibodies against human BORIS and the expression pattern of BORIS in normal and diseased human mammary tissues].

Aim: To prepare monoclonal antibodies(mAb) to BORIS antigen and analyze its expression pattern in breast cancer, benign breast disease and normal breast tissues.

Methods: Female BALB/c mice were immunized with recombination human BORIS protein. Hybridoma cell lines were established by hybridoma technique. BORIS antigen was detected by immunohistochemical (ICH) staining.

Results: Four clones of hybridomas stably secereting mAb against human BORIS were obtained. mAb FMMU-BORIS13 was selected to be employed in ICH. Positive staining was localized in the nuclei of the spermatocytes and spermatogoniums, which was consistent with the typical expression pattern of CT antigen. BORIS antigen was detected in 85%(94/110) of breast cancer, 95%(21/22) of benign breast diseases and 6 normal breast tissues(surrouding tumor free breast tissue).

Conclusion: Four clones of anti-BORIS mAb have been successfully prepared. The expression of BORIS antigen is much stronger in breast cancer than that in benign breast disease and normal breast tissues, which indicate that BORIS may be involved in the pathogenesis of the breast cancer.