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Synovial fluid proteins in degenerative joint disease in dogs

Synovial fluid proteins in degenerative joint disease in dogs

Veterinary Immunology & Immunopathology 22(2): 187-196

Concentrations of three immunoglobulins, albumin, ceruloplasmin, alpha-2 macroglobulin and pregnancy zone protein were estimated by immunoelectrophoresis in paired samples of synovial fluid and serum from 12 dogs with degenerative joint disease (DJD) and six normal dogs. The ratios of synovial fluid to serum concentrations (SF/S) of the four non-immunoglobulins showed an almost inverse linear relationship with their molecular weight in both groups. The SF/S were higher in the DJD synovial fluid than in normal synovial fluid. The difference increased with increasing molecular weight and was highly significant for the largest molecules, reflecting an increased permeability and inflammation in the synovial membrane of DJD joints. The SF/S ratios of the three immunoglobulins studied were compared to the diffusion curves of the four non-immunoglobulins. The SF/S ratios of IgM from dogs with DJD exceeded those calculated from the molecular weights. The present observation support the concept that DJD should be considered an inflammatory disease and suggest that immunologic processes may initiate and/or sustain the inflammation.

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Accession: 001962385

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PMID: 2479164

DOI: 10.1016/0165-2427(89)90060-3

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