Abstract |
Lewis rats develop immune-mediated arthritis following injection with a variety of agents including bovine type II collagen (bCII), mycobacteria, muramyl dipeptide and CP20961. Since susceptibility to experimentally-induced arthritis has been linked to the genes encoding the major histocompatibility complex, it is hypothesized that antigen presentation to autoreactive T-cells is a critical event in the pathogenesis of disease. T-cells, isolated from Lewis rats immunized with bCII or mycobacteria, were co-cultured with splenic or thymic antigen presenting cells (APC) and proliferative responses to antigen were assessed by 3H-thymidine incorporation. T-cell proliferation was observed upon culture with APC without requiring the addition of antigen. T-cells from rats injected with non-immunogenic adjuvants also demonstrated an increased autologous MLR compared to T-cells from non-injected animals. In contrast, T-cells from animals immunized with non-arthritogenic antigens, including ovalbumin or tetanus toxoid, proliferated only when co-cultured with specific antigen-pulsed APC. These results suggest that immunization with arthritogens activates a population of self-reactive T-cells, which respond in an autologous MLR. We propose that these autoreactive T-cells recognize endogenously-derived self peptides rather than peptides derived from a joint autoantigen.
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Authors | Brian Catchpole, Anne S Hamblin, Norman A Staines |
Journal | Autoimmunity
(Autoimmunity)
Vol. 35
Issue 2
Pg. 111-7
(Mar 2002)
ISSN: 0891-6934 [Print] England |
PMID | 12071434
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Adjuvants, Immunologic
- Antigens
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Topics |
- Adjuvants, Immunologic
- Animals
- Antigen-Presenting Cells
(immunology)
- Antigens
(immunology)
- Arthritis
(chemically induced, immunology, microbiology)
- Autoimmunity
(immunology)
- Cell Proliferation
- Cells, Cultured
- Coculture Techniques
- Immunization
- Lymphocyte Culture Test, Mixed
- Mycobacterium tuberculosis
(immunology)
- Phenotype
- Rats
- Rats, Inbred Lew
- T-Lymphocytes
(immunology, microbiology)
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