[Anticarcinogenic action of vitamins PP and B6 in the natulan initiation of malignant growth in mice].

Parenteral administration of vitamins PP and B6 at the initiation stage of natulan-induced carcinogenesis was shown to significantly inhibit formation of lung adenomas. The preventive effect was found to depend on treatment schedule. Biochemical aspects of anticarcinogenic action of the vitamins require special investigation.