title: Suppression of human myelosarcoma growth in athymic mice by a primate antiserum.
abstract: A primate (Macaca speciosa) antiserum prepared against the human chronic myelogenous leukemia cell line K-562 suppressed the growth of the human myelosarcomas in nude mice. The ip administration of 0.5 ml of immune serum plus 0.5 ml of guinea pig complement, starting 7 days after sc tumor transplantation, resulted in a fourfold to fivefold decrease in tumor weight at 15 days when compared to nude mice given pre-immune serum plus complement or complement alone. Whereas the other two groups experienced an exponential increase in tumor volume at 7-9 days after tumor transplantation, the immune serum-treated mice remained in a "lag" phase of tumor growth during which the tumor volume neither increased nor decreased substantially. Histopathologic studies revealed various degrees of tumor alterations ranging form focal hydropic cellular degeneration to massive coagulation necrosis. The incorporation of tritiated thymidine into the tumors was also markedly diminished in the mice given immune serum.
mesh_terms: D000818:Animals; D002455:Cell Division; D002460:Cell Line; D003165:Complement System Proteins; D007116:Immunization, Passive; D007951:Leukemia, Myeloid / Q000473:pathology / Q000628:therapy*; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D012513:Sarcoma, Experimental / Q000628:therapy; D014183:Transplantation, Heterologous
chemical_list: D003165:Complement System Proteins