Antitumor polypeptide and a method of preparing the same.

摘要

This invention relates to a novel anti-tumor polypeptide prepared by suspended-culture of human acute monocytic leukemia cells THP-1 under or after contact with a differentiation inducing agent. The novel anti-tumor polypeptide do not exhibit cytotoxicity against human normal cells but give cytotoxicity to human tumor cells Hela, KB and T-24 cells which is known to be insensitive to conventional TNF, and mouse tumor cells such as sarcoma 180 and L-1210. The antitumor polypeptides may be prepared by a non-expensive serum-free medium.