Objective: To investigate the immune responses induced by apomucin which is a mixture of mucin core peptide, in mice for elucidating the role of mucin core peptide in the modulation of cancers. Methods: Apomucin was ...Objective: To investigate the immune responses induced by apomucin which is a mixture of mucin core peptide, in mice for elucidating the role of mucin core peptide in the modulation of cancers. Methods: Apomucin was isolated from human pancreatic cancer cell line SW1990. The mice were immunized with this apomucin (10μg/time×6) plus DETOX. Results: When immunized, all mice developed delayedtype hypersensitivity (DTH) after challenged with apomucin or synthetic peptide MUC2 or MUC3, while the mice immunized with apomucin alone did not develop DTH. No antibodies were detected by ELISA after immunization. When the spleen cells of vaccinated mice were cocultured with this apomucin (10—50μg/ml) and rhIL2(50U/ml) in vitro, the proliferated lymphocytes showed cytotoxicity against human cancer cells, including colon cancer, gastric cancer, pancreatic cancer and leukemia as measured by Cr51 release assay. Antibodies against MUC2 and MUC3 could block the cytotoxicity. Conclusion: It was identified that a vaccine combined of apomucin and immune adjuvant DETOX can induce cellular immune response and antitumor cytotoxicity in mice.展开更多
文摘Objective: To investigate the immune responses induced by apomucin which is a mixture of mucin core peptide, in mice for elucidating the role of mucin core peptide in the modulation of cancers. Methods: Apomucin was isolated from human pancreatic cancer cell line SW1990. The mice were immunized with this apomucin (10μg/time×6) plus DETOX. Results: When immunized, all mice developed delayedtype hypersensitivity (DTH) after challenged with apomucin or synthetic peptide MUC2 or MUC3, while the mice immunized with apomucin alone did not develop DTH. No antibodies were detected by ELISA after immunization. When the spleen cells of vaccinated mice were cocultured with this apomucin (10—50μg/ml) and rhIL2(50U/ml) in vitro, the proliferated lymphocytes showed cytotoxicity against human cancer cells, including colon cancer, gastric cancer, pancreatic cancer and leukemia as measured by Cr51 release assay. Antibodies against MUC2 and MUC3 could block the cytotoxicity. Conclusion: It was identified that a vaccine combined of apomucin and immune adjuvant DETOX can induce cellular immune response and antitumor cytotoxicity in mice.