Gangliosidosis (Portuguese Water Dog Type)

Test Overview:

Affected dogs typically present with symptoms of neurologic disease around 2 to 6 months of age. Dogs with GM1 gangliosidosis have insufficient activity of the Enzyme beta-galactosidase, which is responsible for breaking down specific carbohydrates in the cells. Symptoms include vision loss, Nystagmus, difficulties walking, loss of balance, head tremors, abnormal bone growth and weight loss


Metabolic - Associated with the enzymes and metabolic processes of cells


Galactosidase beta 1 (GLB1) on Chromosome 23

Variant Detected:

Base Substitution c.179G>A p.Arg60His


Moderate. This disease can cause significant signs of discomfort and/or dysfunction in affected animals. It may involve relatively high treatment/management costs, and can sometimes reduce life expectancy.

Mode of Inheritance:

Autosomal Recessive

Research Citation(s):

Wang, ZH. Isolation and characterization of the normal canine ?-galactosidase gene and its mutation in a dog model of GM1-gangliosidosis. (2000) J Inherit Metab Dis, 23;593-606.

Associated Breed(s):

Mixed Breed, Porti-Doodle, Portuguese Water Dog,