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  • Title: Immunohistochemical evidence for immunoglobulin and complement deposition in spinal cord lesions in degenerative myelopathy in German shepherd dogs.
    Author: Barclay KB, Haines DM.
    Journal: Can J Vet Res; 1994 Jan; 58(1):20-4. PubMed ID: 8143248.
    Abstract:
    The purpose of this study was to examine the distribution of immunoglobulin and complement component C3 in spinal cord tissues of dogs with degenerative myelopathy. Sections of formalin-fixed paraffin-embedded spinal cord from five German Shepherd dogs with clinical and histological features consistent with degenerative myelopathy (DM) and one normal dog were tested immunohistochemically for deposition of immunoglobulin G (IgG) and the third component of complement (C3). In all dogs there was staining associated with large and small blood vessels. In addition, in the dogs with DM there was focal staining for IgG and C3 in spinal nerve tracts characteristically affected in DM. Deposition of IgG and C3 was found in histological lesions, and in addition, in other areas independent of visible lesions, suggesting that IgG and C3 deposition may precede histological evidence of spinal cord damage. These findings suggest a role for immune-mediated destruction of the spinal cord which may contribute to the pathogenesis of DM in German Shepherd dogs.
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