Hereditary cerebellar degeneration in three full sibling kittens

Area of Science:

• Veterinary Neurology
• Genetics
• Neuroscience

Background:

• Cerebellar dysfunction in young animals can have various causes.
• Genetic factors are increasingly recognized in neurological diseases of companion animals.

Purpose of the Study:

• To investigate the clinical and pathological findings in littermate kittens with progressive cerebellar dysfunction.
• To determine the underlying cause of the observed neurological signs.

Main Methods:

• Clinical observation of affected kittens from seven weeks of age.
• Postmortem examination and histopathological analysis of the cerebellum, medulla, and cervical spinal cord.
• Evaluation of familial occurrence within two litters from the same parents.

Main Results:

• Progressive cerebellar cortical degeneration with extensive Purkinje cell loss was observed in affected kittens.
• Medullary neuronal changes consistent with neuraxonal dystrophy and focal neuropil vacuolation were also identified.
• The condition appeared to be inherited, affecting multiple kittens from the same parents across two litters.

Conclusions:

• The observed lesions are likely due to a genetically determined abiotrophy affecting the cerebellum.
• Neuraxonal dystrophy may also be a component of this inherited neurological disorder in domestic shorthair cats.
• Further research into the genetic basis of feline neurological diseases is warranted.