Characterization of a monoclonal antibody directed against the biologically active site of human interleukin 1.
Human IL-1 was successfully used to produce an anti-IL-1 mAb. Anti-IL-1 (IgG2a) blocked IL-1-mediated thymocyte and fibroblast proliferation, but did not interfere with the biological effects of other lymphokines, such as IL-2 or IL-3. The antibody immunoprecipitated biosynthetically radiolabeled 33, 17, and 4 kD IL-1. An immunoadsorbent column yielded 20% of initial activity, and upon HPLC size-exclusion chromatography, affinity-purified IL-1 had a molecular mass of approximately 4 kD. These results provide first evidence of a monoclonal anti-IL-1 that reacts with different species of IL-1 and apparently binds to an epitope close to the active site of IL-1. Thus, anti-IL-1 IgG may be very helpful for further investigations of the molecular as well as biological characteristics of IL-1 and related mediators.
Köck
A
A
Danner
M
M
Stadler
B M
BM
Luger
T A
TA
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000302:isolation & purification; D000918:Antibody Specificity; D001665:Binding Sites; D002846:Chromatography, Affinity; D000939:Epitopes / Q000276:immunology; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology* / Q000302:isolation & purification; D007375:Interleukin-1 / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C / Q000276:immunology
D000911:Antibodies, Monoclonal; D000939:Epitopes; D007074:Immunoglobulin G; D007375:Interleukin-1