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Alaskan Husky encephalopathy--a canine neurodegenerative disorder resembling subacute necrotizing encephalomyelopathy (Leigh syndrome).

Abstract：

:The gross and histopathological findings in the brain and spinal cord of five Alaskan Husky dogs with a novel incapacitating and ultimately fatal familial and presumed hereditary neurodegenerative disorder are described. Four dogs presented with neurological deficits before the age of 1 year (7-11 months) and one animal at 2.5 years old. Clinical signs in all dogs were of acute onset and included ataxia, seizures, behavioral abnormalities, blindness, facial hypalgesia and difficulties in prehension of food. In animals allowed to survive, the disease was static but with frequent recurrences. Pathological findings were limited to the central nervous system. Grossly visible bilateral and symmetrical cavitated foci were consistently present in the thalamus with variable extension into the caudal brain stem. Microscopic lesions were more widespread and included foci of bilateral and symmetrical degeneration in the basal nuclei, midbrain, pons and medulla, as well as multifocal lesions at the base of sulci in the cerebral cortex and in the gray matter of cerebellar folia in the ventral vermis. Neuronal loss with concomitant neuronal sparing, spongiosis, vascular hypertrophy and hyperplasia, gliosis, cavitation and transient mixed inflammatory infiltration were the main histopathological findings. In addition, a population of reactive gemistocytic astrocytes with prominent cytoplasmic vacuolation was noted in the thalamus. Lesions of this nature in this distribution within the neuroaxis have not been reported in dogs. The neuropathological findings resemble Leigh's disease/subacute necrotizing encephalomyelopathy of man. Neuronal sparing in conjunction with apparently transient astrocytic vacuolation point to the possible pathogenetic role of astrocytes in the evolution of these lesions. An inherited metabolic derangement of unknown nature is postulated as the cause of this breed-specific disorder.

journal_name

Acta Neuropathol

journal_title

Acta neuropathologica

authors

Brenner O,Wakshlag JJ,Summers BA,de Lahunta A

doi

10.1007/s004010051192

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

50-62

issue

eissn

0001-6322

issn

1432-0533

journal_volume

100

pub_type

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Alaskan Husky encephalopathy--a canine neurodegenerative disorder resembling subacute necrotizing encephalomyelopathy (Leigh syndrome).