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2015 ; 11
(ä): 251
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Clinical and histopathological features resembling those of human focal segmental
glomerulosclerosis in a cat with nonimmune-mediated glomerulonephropathy
#MMPMID26445234
Sugahara G
; Hosaka S
; Mineshige T
; Kamiie J
; Shirota K
BMC Vet Res
2015[Oct]; 11
(ä): 251
PMID26445234
show ga
BACKGROUND: Nonimmune-mediated glomerulonephropathies are rarely reported in
domestic animals with the exception of amyloidosis. Here we describe the
pathological features and clinical course of a feline with protein-losing
nonimmune-mediated glomerulonephropathy characterized by segmental
glomerulosclerosis and severe podocyte injury. CASE PRESENTATION: A castrated
male Japanese domestic cat aged 3 years and 8 months had hypertension, persistent
proteinuria, and azotemia. Microscopic examination of a renal biopsy revealed
many glomeruli with adhesion to the Bowman's capsule and segmental sclerosis. The
most characteristic ultrastructural glomerular feature was severe podocyte foot
process effacement. No electron-dense deposits were observed. Immunofluorescence
revealed no immune deposits, but abnormal expression of nephrin and podocin was
detected in the glomeruli. These findings resemble those of human focal segmental
glomerulosclerosis. The cat temporarily responded to treatment with
angiotensin-converting enzyme inhibitors and prednisolone administration but died
of progressive renal failure 32 months after biopsy. CONCLUSIONS: The cat was
diagnosed with nonimmune mediated glomerulonephropathy because of the absence of
immune deposits and severe podocyte injury. To our knowledge, this is the first
report of nonimmune-mediated glomerulonephropathy in a cat resembling human focal
segmental glomerulosclerosis.