title: Interleukin 1 potentiates the lethal effect of tumor necrosis factor alpha/cachectin in mice.
abstract: Human rIL-1 alpha and human rIL-1 beta were examined for their ability to potentiate the lethal and hypothermic effects of mouse rTNF-alpha in mice. The LD50 of rTNF-alpha was 1.5 micrograms/mouse, whereas the LD50 of rTNF-alpha was reduced to 0.4 micrograms/mouse and 0.5 micrograms/mouse when rTNF-alpha was administered in combination with a nonlethal dose of rIL-1 alpha or rIL-1 beta, respectively. A similar rTNF-alpha enhancing effect of the rIL-1 was observed on the temperature response. The results show that the rIL-1 markedly potentiate the effects of rTNF-alpha on lethality and temperature in mice, and support our suggestion that TNF-alpha and IL-1 may have synergistic lethal effect in human septic shock.
authors.affiliation: Cell Research Laboratory, Institute of Cancer Research, University of Trondheim, Norway.
authors.forename: A
authors.initials: A
authors.lastname: Waage
authors.forename: T
authors.initials: T
authors.lastname: Espevik
mesh_terms: D000818:Animals; D001831:Body Temperature / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D007158:Immunologic Techniques; D007375:Interleukin-1 / Q000008:administration & dosage*; D007928:Lethal Dose 50; D051379:Mice; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha / Q000008:administration & dosage*
chemical_list: D007375:Interleukin-1; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha