title: Prevention of death from metastases by immune RNA therapy.
abstract: The effect of immune RNA treatment on the incidence of death from pulmonary metastases was studied in C57BL/6J mice after excision of a B16 murine melanoma. Immune RNA was extracted from the lymphoid tissues of guinea pigs immunized with B16 tumor and then incubated in vitro with normal C57BL/6J mouse splenocytes. Mice receiving intraperitoneal injections of these RNA-treated syngeneic splenocytes after the primary B16 isograft was resectioned showed significantly improved long-term survival (42 to 67 percent in three successive experiments) as compared to control mice (0 to 20 percent survival) receiving untreated splenocytes. The effect of RNA treatment was tumor-specific and ribonuclease sensitive. The results suggest that immunotherapy with immune RNA may be of benefit to certain patients after surgery for cancer.
mesh_terms: D000818:Animals; D007167:Immunotherapy / Q000379:methods; D008175:Lung Neoplasms / Q000517:prevention & control; D008214:Lymphocytes / Q000276:immunology*; D008545:Melanoma / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D009362:Neoplasm Metastasis / Q000517:prevention & control*; D009374:Neoplasms, Experimental / Q000276:immunology; D012313:RNA / Q000276:immunology / Q000627:therapeutic use*; D013154:Spleen / Q000276:immunology
chemical_list: D012313:RNA