title: Suppressive effects of anti-mu serum on the development of collagen arthritis in rats.
abstract: Sprague-Dawley rats were maintained in environmentally isolated conditions and some of them were injected beginning at birth with rabbit anti-mu serum to suppress B-cell maturation. All rats were subsequently immunized with chick type II collagen. Ten (28%) of 36 rats injected with anti-mu antiserum failed to develop serum hemagglutinating antibodies to collagen, and there was a significant (P less than 0.0003) reduction in the IgG-specific antibody titer to collagen in these 10 rats compared to the other 26 rats in this group. Only 1 (10%) of the antibody-suppressed rats developed arthritis compared to 20 (77%) of the 26 other rats in the anti-mu-treated group (P less than 0.001). Twenty-two (61%) of 36 immunized rats administered rabbit anti-ovalbumin serum and 14 (88%) of 16 immunized rats kept in the axenic conditions developed arthritis. Delayed-type hypersensitivity to collagen did not differ significantly between the groups. These data provide indirect evidence that antibodies play a role in the inception of collagen arthritis.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001168:Arthritis / Q000276:immunology / Q000517:prevention & control*; D001402:B-Lymphocytes / Q000276:immunology; D003094:Collagen / Q000276:immunology*; D005260:Female; D006386:Hemagglutination Tests; D007106:Immune Sera / Q000008:administration & dosage*; D007108:Immune Tolerance; D007116:Immunization, Passive; D007148:Immunoglobulin mu-Chains; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D007106:Immune Sera; D007148:Immunoglobulin mu-Chains; D003094:Collagen