title: CD4+ T cells from collagen-induced arthritic mice are essential to transfer arthritis into severe combined immunodeficient mice.
abstract: The role of T lymphocytes in the adoptive transfer of collagen-induced arthritis (CIA) in DBA/1J mice to severe combined immunodeficient (SCID) mice was investigated. Spleen cells from non-immunized, type I collagen (CI) or type II collagen (CII)-immunized DBA/1J mice were injected into SCID mice which lack functional T and B cells. Specific antigenic stimulation of arthritogenic cells was required since only lymphocytes from arthritic CIA mice plus simultaneous administration of CII transferred arthritis to 11 of 12 SCID mice with a marked increase in CII antibody titre. However, CI-immunized or non-immunized DBA/1J mice cells did not induce arthritis in SCID mice. SCID recipients of pre-arthritic CIA lymphocytes presented increase in CII antibody, but showed no clinical signs of arthritis, suggesting that antibodies to CII alone can not induce CIA. Depletion of CD4+ T cells inhibited the transfer of arthritis to SCID mice, with a decrease in CII antibody titre in chimaeras. In contrast, depletion of CD8+ T cells enhanced the onset of arthritis in SCID mice. The results imply that CD4+ T cells are required for the induction of CIA. In addition, CD8+ T cells might have a suppressive role in the etiology of this disease. It is probable that memory CD4+ T cells stimulate production of antibodies to CII and subsequent arthritis. This study clarifies the role of T lymphocytes in the transfer of CIA to SCID mice.
authors.affiliation: Department of Orthopaedic Surgery, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: K M
authors.initials: KM
authors.lastname: Kadowaki
authors.forename: H
authors.initials: H
authors.lastname: Matsuno
authors.forename: H
authors.initials: H
authors.lastname: Tsuji
authors.forename: I
authors.initials: I
authors.lastname: Tunru
mesh_terms: D000818:Animals; D001169:Arthritis, Experimental / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000637:transplantation; D016827:CD8 Antigens / Q000276:immunology; D003094:Collagen / Q000276:immunology; D005434:Flow Cytometry; D008297:Male; D051379:Mice; D008811:Mice, Inbred DBA; D016513:Mice, SCID; D016176:T-Lymphocyte Subsets / Q000276:immunology
chemical_list: D016827:CD8 Antigens; D003094:Collagen