In the present study, the conjugate of mitomycin C (MMC) with a murine monoclonalantibody against gastric cancer, MG11, was prepared and its cytotoxicity on gastric cancer cell lineKATOⅢ was determined. MMC was mod...In the present study, the conjugate of mitomycin C (MMC) with a murine monoclonalantibody against gastric cancer, MG11, was prepared and its cytotoxicity on gastric cancer cell lineKATOⅢ was determined. MMC was modified with glutaric anhydride to introduce a carboxylicgroup at N-lα position. The MMC derivative was then treated with N-hydroxysuccinimide anddicyclohexylcarbodimide to from MMC active ester, which was combined with monoclonal antibodyMG11 for preparation of MG11-MMC conjugate, which showed highly selective cytotoxicity uponhuman gastric cancer cell line KATOⅢ in culture. In the 48h exposure test, the cytotoxicity ofMG11-MMC conjugate on target cells was found to be similar to that of free MMC. The conjugatehad only a little effect upon nontarget cells (human normal embryonic lung cell line SL<sub>7</sub>). The re-sults suggest that the selective cytotoxicity on target cells of MG11-MMC is mediated by theantibody.展开更多
文摘In the present study, the conjugate of mitomycin C (MMC) with a murine monoclonalantibody against gastric cancer, MG11, was prepared and its cytotoxicity on gastric cancer cell lineKATOⅢ was determined. MMC was modified with glutaric anhydride to introduce a carboxylicgroup at N-lα position. The MMC derivative was then treated with N-hydroxysuccinimide anddicyclohexylcarbodimide to from MMC active ester, which was combined with monoclonal antibodyMG11 for preparation of MG11-MMC conjugate, which showed highly selective cytotoxicity uponhuman gastric cancer cell line KATOⅢ in culture. In the 48h exposure test, the cytotoxicity ofMG11-MMC conjugate on target cells was found to be similar to that of free MMC. The conjugatehad only a little effect upon nontarget cells (human normal embryonic lung cell line SL<sub>7</sub>). The re-sults suggest that the selective cytotoxicity on target cells of MG11-MMC is mediated by theantibody.