title: Treatment with gamma-interferon triggers the onset of collagen arthritis in mice.
abstract: We investigated the effect of gamma-interferon (gamma-IFN) on the development of type II collagen (CII)-induced arthritis. DBA/1 mice were immunized with rat CII and 16 days later, were treated with subcutaneous injections of recombinant rat gamma-IFN into the right paws twice a week. Compared with controls, the gamma-IFN-treated mice developed arthritis with a higher frequency and severity. Immunohistochemical analysis of gamma-IFN-treated paws from CII-immunized mice revealed an increase in the numbers of class II antigen-expressing cells and an infiltration of CD4+ lymphocyte-like cells. The auto-antibody response toward CII was suppressed by gamma-IFN treatment. The findings implicate gamma-IFN in a role that triggers arthritis by enhancing local inflammatory processes in the joints, or possibly, by permitting homing of T cells to the joints.
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology / Q000473:pathology; D001168:Arthritis / Q000139:chemically induced*; D001169:Arthritis, Experimental / Q000139:chemically induced* / Q000276:immunology / Q000473:pathology; D003094:Collagen / Q000009:adverse effects* / Q000276:immunology*; D007114:Immunization; D007150:Immunohistochemistry; D007371:Interferon-gamma / Q000494:pharmacology*; D007596:Joints / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D008811:Mice, Inbred DBA
chemical_list: D007371:Interferon-gamma; D003094:Collagen