[The biological activity of human recombinant interleukin-1 beta when administered in vivo].

Human recombinant IL-1 beta injected intraperitoneally into CBA mice dose-dependently induced leukocytosis, stimulated phagocytosis and reduced tetrazolium nitroblue by peritoneal leukocytes, colony formation by bone marrow cells, enhanced Con A and IL-2-induced proliferation and IL-2 production in thymocytes and splenocytes. Recombinant IL-1 beta restored bone marrow cell proliferation reduced after 5-fluorouracil treatment and significantly increased the survival rates of lethally irradiated mice.