[Effects of monoclonal anti-idiotypic antibody, internal image of benzo(a)pyrene on sarcoma in rats].

The effects of a monoclonal anti-idiotypic antibody (Ab), internal image of conjugated benzo(a)pyrene [B(a)P], called AIB1, on B(a)P-induced malignant sarcomas in Sprague-Dawley (SD) female rats were evaluated at different times after B(a)P-administration. As previously described, circulating anti-"phosphatidylinositol (PtdIns)-like" autoantibody levels were found to be significantly higher in B(a)P-treated rat sera. They were decreased after AIB1 Ab-treatment. Furthermore, the tumor growth was slowed down compared with that of controls and animal survival was slightly increased. These results showed the relationships between metabolic pathways involving possible "B(a)P-like" endogenous ligand/cytosolic receptor(s) and the PtdIns.