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. 1987 Feb;84(3):832–836. doi: 10.1073/pnas.84.3.832

Epitopes of proteoglycans eliciting an anti-proteoglycan response in chronic immune synovitis.

J U Yoo, T F Kresina, C J Malemud, V M Goldberg
PMCID: PMC304310  PMID: 2433690

Abstract

This study details the immune response to cartilage proteoglycan in experimental chronic IgG-induced immune synovitis. Antibodies reactive with purified rabbit proteoglycan monomer were observed in nine of nine rabbits with immune synovitis. IgG-immunized but nonsynovitic control animals with no pathology showed no antibody response. A panel of murine monoclonal antibodies with defined specificity towards rabbit proteoglycan were utilized to characterize the epitope specificity of the immune synovitis polyclonal anti-proteoglycan response. One murine monoclonal antibody, 6C11, inhibited the binding of the polyclonal antisera to proteoglycan in all nine animals with significant (greater than 40%) inhibition in six of nine rabbits. Further inhibition studies utilizing DEAE-cellulose-resolved proteoglycan tryptic peptides revealed that peptides poor in chondroitin sulfate were strong inhibitors of binding of the polyclonal antibodies to the proteoglycan substrate. In particular, keratan sulfate-containing tryptic peptides were most inhibitory on a per weight basis. These results indicate that, in chronic IgG-induced immune synovitis, anti-proteoglycan antibodies elicited are heterogeneous with regard to specificity, but a relatively large proportion predominantly recognized a portion of the proteoglycan molecule containing core protein and associated keratan sulfate.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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