Suppression of antigen‐induced arthritis in lewis rats by oral administration of type ii collagen
Open Access
- 1 August 1995
- journal article
- research article
- Published by Wiley in Arthritis & Rheumatism
- Vol. 38 (8), 1092-1096
- https://doi.org/10.1002/art.1780380811
Abstract
Objective. To assess the effect of orally administered type II collagen (CII) in antigen-induced arthritis (AIA). Methods. Arthritis was induced in Lewis rats by immunization with methylated bovine serum albumin (mBSA) in Freund's complete adjuvant, followed by an intraarticular injection of mBSA 2 weeks later. Different doses of CII, mBSA, and an unrelated control protein, keyhole limpet hemocyanin (KLH), were orally administered 5 times over several days prior to the induction of arthritis. Ankle joint swelling and delayed-type hypersensitivity (DTH) responses were measured. Results. Joint swelling was significantly reduced at a dose of 3 μg and 30 μg of CII, but not at 300 μg. The most prominent suppression of AIA was observed when rats were fed 10 mg of mBSA, whereas oral KLH had no effect. DTH responses were significantly reduced in the mBSA-fed rats, but not in rats that were fed CII or KLH. Conclusion. Oral CII can suppress arthritis in an animal model in which immunity to collagen does not play a role. The effect is dose dependent and occurs at lower doses of CII. These results demonstrate the biologic relevance of bystander suppression associated with oral tolerance, and the potential use of this approach to treat human inflammatory joint disease.Keywords
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