The generation and accumulation of genetic mutations have been associated w
ith carcinogenesis. Epidemiological and experimental evidence implicate par
voviruses in growth inhibition (oncosuppression) and selective destruction
(oncolysis) of tumor cells. It is proposed here that parvoviruses can prefe
rentially target genetically unstable tumor cells, which are deficient in D
NA repair mechanisms. This selective strategy may serve as a virus-based th
erapeutic approach against cancer. (C) 2000 Harcourt Publishers Ltd.