INTENSIFICATION OF ANTITUMOR-IMMUNITY BY PROTEINBOUND POLYSACCHARIDE, EA_6,DERIVED FROM FLAMMULINA VELUTIPES (CURT.ex FR.) SING. COMBINED WITH MURINE LEUKEMIA L1210 VACCINE IN ANIMAL EXPERIMENTS

概要

論文の詳細を見る
The antitumor effect of protein-bound polysaccharide, EA_6,derived from fruit bodies of Flammulina velutipes (CURT.ex FR.) SING., when combined with a vaccine treatment was studied by the challenge test in BDF_1 mice and L1210 murine leukemia system. Intensification of the antitumor effect of EA_6 was dependent on doses, timing, and frequency of intraperitoneal administration of the material to the immunization by concanavalin A and/or glutaraldehyde treated L1210 vaccine. Administration of EA_6 prior to the injection of the vaccine, or repeated injection of more than 4 times did not increase the life span of the animals. But when EA_6 was given (40mg/kg) after the injection of the vaccine, marked prolongation of the life span (ILS of 223%) was observed against challenging of 1×10^2 cells of L1210. Combined treatment of EA_6 with vaccine exhibited prolonged ILS in the mice challenged with 1×10^3 cells of L1210. The specific immunity for L1210 induced by the vaccine was not affected by EA_6.