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2013 ; 74
(4
): 621-8
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Western blot patterns of serum autoantibodies against optic nerve antigens in
dogs with goniodysgenesis-related glaucoma
#MMPMID23531071
Pumphrey SA
; Pizzirani S
; Pirie CG
; Anwer MS
; Logvinenko T
Am J Vet Res
2013[Apr]; 74
(4
): 621-8
PMID23531071
show ga
OBJECTIVE: To investigate whether differences existed between clinically normal
dogs and dogs with goniodysgenesis-related glaucoma (GDRG) in serum
autoantibodies against optic nerve antigens. ANIMALS: 16 dogs with GDRG, 17
healthy dogs with unremarkable pectinate ligament and iridocorneal angle
morphology, and 13 euthanized dogs with no major ocular abnormalities or
underlying diseases. PROCEDURES: Western blotting was performed with optic nerve
extracts from the euthanized dogs as an antigen source and serum from clinically
normal dogs and dogs with GDRG as a primary antibody (autoantibody) source. Blots
were evaluated for presence and density of bands. RESULTS: Multiple bands were
identified on western blots from all dogs with GDRG and all clinically normal
dogs, with a high degree of variability among individual dogs. Dogs with GDRG
were significantly more likely than healthy dogs to have bands present at 38, 40,
and 68 kDa. Dogs with GDRG had significant increases in autoreactivity at 40 and
53 kDa and a significant decrease in autoreactivity at 48 kDa. CONCLUSIONS AND
CLINICAL RELEVANCE: Significant differences in serum autoantibodies against optic
nerve antigens were found in dogs with versus without GDRG. Although it remains
unclear whether these differences were part of the pathogenesis of disease or
were sequelae to glaucomatous changes, these findings provide support for the
hypothesis that immune-mediated mechanisms play a role in the development or
progression of GDRG. However, the high degree of variability among individual
dogs and the considerable overlap between groups suggest that the clinical
usefulness of this technique for distinguishing dogs with GDRG from clinically
normal dogs is likely limited.