[Hematopoietic stem cells and antiblastic drugs. II. Variations in the colony forming cells in vivo after administration of peptichemio].

Peptichemio, administered in a single LD50, dose, induces a significant reduction of mice bone marrow and spleen CFUs. The lesive action appears to be similar to that observed after a single dose of various antineoplastic agents. The effects of increasing doses of Peptichemio are also reported.