[Host-leukemogenic virus relation: genetic control of the appearance of leukemia]

A complex genetic system controls the susceptibility to virus induced leukemia. A good example is provided by AKR mice in which several genes acting in association are involved. The control is demonstrable at several levels: a) virus expression, b) virus replication, c) antitumor immune response. In addition one or two other genes could be involved. The "Leukemia-permissive" genotype would be probably rarely present and the AKR provides the model of a mice in which all genetic locus bear the permissive alleles.