title: Role of interleukin 1 and interleukin 2 in rat and mouse arthritis models.
abstract: The production of interleukin 1 (IL 1) and interleukin 2 (IL 2) by macrophages and lymphocytes from three animal models commonly used for rheumatoid arthritis, viz. adjuvant-induced and type II collagen-induced rat arthritis, and MRL/1 murine arthritis was studied. Although the peritoneal macrophages from adjuvant-arthritic rats in culture produced increased amounts of prostaglandin E2 (PGE2) and lower levels of IL 1 than the control group, cells from collagen-arthritic rats released normal levels of PGE2, but increased amounts of IL 1. After activation with lipopolysaccharides, the IL 1 production by macrophages from all groups was comparable. Addition of indomethacin did not significantly change the IL 1 production in any of these groups. In the absence of any exogenous mitogen, IL 2 production by the lymphocytes of adjuvant-arthritic rats was low, but could be restored to the normal levels when phytohemagglutinin A (PHA) or concanavalin A (Con A) was added. The lymphocytes from collagen-arthritic rats were capable of producing IL 2 without the need of any T cell mitogen. The lymphocytes from MRL/1 mice seemed to lack the functionality in terms of IL 2 production. The macrophagic IL 1 production in these animals was normal. Our data suggest that the type II collagen arthritis model may closely resemble human rheumatoid arthritis in which IL 1 and IL 2 production by the mononuclear cells is significantly enhanced.
mesh_terms: D000818:Animals; D001168:Arthritis / Q000276:immunology*; D001169:Arthritis, Experimental / Q000209:etiology / Q000276:immunology*; D004195:Disease Models, Animal; D005260:Female; D005620:Freund's Adjuvant / Q000008:administration & dosage / Q000276:immunology; D007375:Interleukin-1 / Q000096:biosynthesis / Q000502:physiology*; D007376:Interleukin-2 / Q000096:biosynthesis / Q000502:physiology*; D008198:Lymph Nodes; D008213:Lymphocyte Activation; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D010529:Peritoneal Cavity; D051381:Rats; D011917:Rats, Inbred Lew; D013154:Spleen
chemical_list: D007375:Interleukin-1; D007376:Interleukin-2; D005620:Freund's Adjuvant