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Original Article

Single Immunization of Newborn Mice with Heterologous Type-II Collagen Induces Arthritic Disease

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Pages 205-210 | Received 05 Dec 2002, Accepted 18 Mar 2003, Published online: 07 Jul 2009
 

Abstract

Collagen-induced arthritis (CIA) is a widely accepted model of autoimmune disease with significant similarities to rheumatoid arthritis in humans. CIA is provoked in susceptible strains upon immunization of adult mice with native type-II collagen in complete Freund's adjuvant (CFA). Neonatal exposure to antigen is supposed to result in T cell clone deletion and induction of tolerance. Here we report that the neonatal injection of bovine type-II collagen (bCII) to ICR (CD-2) mice triggers the development of autoimmune chronic joint inflammation. Compared with standard CIA significant joint swelling was not observed and anti-collagen antibodies were not detected if the second challenge with the antigen was not supplied. Histopathologic examination of the joints showed cell infiltration, synovial hyperplasia and at the later period bone destruction. Mice immunized as neonates expressed Ag-specific proliferative response and delayed type hypersensitivity (DTH) reaction to bCII.

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