Suppression of Ehrlich ascites tumors in mice by minute virus of mice.

As a model system to study parvoviral oncosuppression, Ehrlich ascites (EA) cells were injected into the peritoneal cavities of ICR mice, and the effect of im injection of minute virus of mice (MVM) on EA tumor growth was examined. Coinjection with MVM resulted in a dramatic inhibition of EA tumor formation. Tumor suppression required viable, infectious virus. Mice that had survived one EA-MVM coinjection acquired long-term resistance to additional injections of EA cells.