INHIBITORY EFFECTS OF ACTINOMYCIN 23—21 ON TRANSPLANTED TUMORS OF HUMAN NASOPHARYNGEAL CARCINOMATOUS CELLS AND GASTRIC CARCINOMATOUS CELLS IN NUDE MICE

Actinomycin23—21(Act 23—21)is an anticancer antibiotic of Actinmycies.This antibiotic was pro-duced from soil Streptomyces flaveolus which was isolated and obtained from soil samples in Fuzhou,China.The effects of Act 23—21 were observed on using two transplanted models of human nasopharyngeal carcino-matous cells(CNE—2Z)and human gastric carcinomatous cells(MGc—803)in nude mice.At Act 23—21 50