The antineoplastic activity of hexaziridinocyclotriphosphazene (Myko 63) in murine tumors

The antineoplastic activity of hexaziridinocyclotriphosphazene (Myko 63) has been investigated in a panel of murine ascitic and solid tumors. Myko 63 was found to significantly retard primary and secondary tumor growth and to prolong the survival rates in each of the nine models employed. These included the L1210 and P388 leukemias, P815 mastocytoma, the 3LL and Madison 109 carcinomas, M5076 reticulum cell sarcoma, the line 26 colon and line 16 mammary carcinomas, and an intracranially implanted ependymoblastoma. The possible modes of action of this compound and the potentials of cyclophosphazenes, a chemical class largely unexplored as antitumor agents are discussed.