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New cerebellar ataxia gene identified in dogs
Date:6/18/2012

Researchers at the University of Helsinki and the Folkhlsan Research Center, Finland, have identified the genetic cause of early-onset progressive cerebellar degeneration the Finnish Hound dog breed. The study, led by Professor Hannes Lohi, revealed a new disease mechanism in cerebellar degeneration. A mutation was identified in the SEL1L gene, which has no previous link to inherited cerebellar ataxias.

This gene find is the first in canine early-onset cerebellar degeneration, and has enabled the development of a genetic test to help eradicate the disease from the breed. At the same time, SEL1L represents a novel candidate gene in human early-onset degenerative ataxias.

The research was published in the scientific journal PLoS Genetics on June 14, 2012.

Inherited ataxias affect both humans and animals. In humans, the hereditary ataxias are a heterogeneous disease group, characterized by cerebellar degeneration and dysfunction. The cerebellum is a part of the brain that is involved in coordination of movement. Degeneration of the cerebellar structures causes ataxia, which is a neurological sign of defective motor coordination that can affect gait, balance, speech and gaze. Approximately 20 known disease-causing genes have been identified in both autosomal recessive and dominant ataxias in humans but the genetic background of canine cerebellar ataxias has remained largely unknown.

The clinical signs of Finnish Hound cerebellar ataxia are present by the age of two months. The affected puppies have difficulty in controlling their leg movements and keeping their balance. The disease progresses rapidly, and in the end eating becomes impossible because of uncontrolled head movements. There is no cure for the disease and affected puppies have to be euthanized.

The research conducted by Professor Lohi and co-workers revealed marked neuronal loss in the cerebellar cortex of affected Finnish Hound puppies. By comparin
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Contact: Professor Hannes Lohi
hannes.lohi@helsinki.fi
358-919-25085
University of Helsinki
Source:Eurekalert

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