Induction of antitumor immunity using intercellular adhesion molecule 1 (ICAM-1) transfection in mouse glioma cells.

We investigated the role of intercellular adhesion molecule 1 (ICAM-1) expression in tumorigenicity of gliomas and the antitumor effects of glioma cells genetically engineered to express ICAM- 1. Mouse glioma cells transfected with ICAM-1 grew in T-cell deficient mice but not in syngeneic mice. Vaccination with ICAM-1-transfected tumor cells markedly inhibited the growth of subcutaneously inoculated gliomas but not gliomas located in the brain. In vivo antibody ablation study revealed that CD4+ T, CD8+ T and NK cells were all required to produce the antitumor effect of SR/ICAM- 1. In this study, we demonstrated the therapeutic potential of vaccination with ICAM-1-overexpressing tumor cells for the control of the tumor growth.