GM1 Gangliosidosis in Dogs

Category: Nervous System & Behavioral
Inheritance: Autosomal recessive
Breeds documented: 3
Published sources: 6

Overview

This inherited disease reduces the activity of beta-galactosidase, an enzyme that helps cells break down certain substances. This inherited storage disease progressively harms the nervous system. Affected young dogs may lose balance, develop head tremors and become weak. Vision and awareness can also deteriorate as the condition advances. The disorder is serious and typically leads to a greatly shortened life.

Signs to watch for

Wobbling, losing balance or falling
A shaking head, especially during movement
Steps that lift the legs unusually high
Increasing weakness or difficulty walking
Worsening vision or cloudy eyes

Signs often become apparent in puppyhood; onset around five months is reported in Shiba Inus.

Emergency Call a vet now if your dog starts staggering.

Diagnosis and tests

A vet can use genetic testing to check for a known disease-causing variant. Specialized blood testing can measure the activity of the affected enzyme. Brain scans may show changes that support suspicion of the disease, but confirmation relies on enzyme testing or genetic analysis.

Breeds with documented risk

3 breeds

By breed size

1 Small
2 Medium

Portuguese Water DogMedium · Working Group
Shiba InuSmall · Non-Sporting Group
Alaskan HuskyMedium

Inheritance

Autosomal recessive
A dog is affected only if it inherits two copies of the gene variant, one from each parent. A dog with one copy is a carrier: usually healthy, but able to pass the variant on. When two carriers are bred, on average one puppy in four is affected. A DNA test can tell clear, carrier and at-risk dogs apart.
As stated by OMIA

We've gathered what published sources say about this condition, so you can talk it through with your vet. It isn't veterinary advice: you and your vet know your dog best.