The Anti-Hepatoma Effect of Superantigen Staphylococcal Enterotoxin A Targeted by Monoclonal Antibody / 中国肿瘤生物治疗杂志

ABSTRACT

Objective: To prepare the conjugate of supcrantigen (SAg) staphylococcal enterotoxin A (SEA) and monoclonal antibody (McAb) against human hepatocellular carcinoma HAbl8 F(ab' )_(2) fragment and to investigate the anti-human hepatoma effect of peripheral blood mononuclear cells (PBMC) targeted by HAbl8 F(ab' )i-SEA. Methods: McAb HAbl8 was extracted and its F(ab' )_(2) fragment was prepared with papain; the conjugate HAblS F(ab' )_(2)-SEA was prepared with N-succinimidyl-3-(2-pyridyldithio) propionate (SPDP); eveny collected peak after purification was identified with gel chromatography; the activity of antibody in the conjugate was identified with immunohistocheinical ABC method; the anti-hepatoma effect of PBMC targeted by HAbl8 F(ab' )_(2)-SEA was observed with MTT method. Results: The conjugate HAbl8 F(ab' )_(2)-SEA was prepared successfully and it had obvious effect of targeting PBMC to kill hepatoma cells, and this effect is correlated positively with the dose of HAbl8 F(ab')_(2)-SEA. Control groups had no such effect. Conclusion: Targeting therapy of hepatoma with McAb-SAg conjugate might be a kind of hopeful model of hepatoma im-munotherapy.