Mucopolysaccharidosis VI / MPS VI / Maroteaux-Lamy (ARSB-related) - Miniature Pinscher

What does this test assess?

This genetic test analyses the ARSB c.910G>A variant in the Miniature Pinscher. The condition is known as mucopolysaccharidosis type VI, MPS VI, Maroteaux-Lamy syndrome and arylsulfatase B deficiency.

The ARSB gene encodes arylsulfatase B, a lysosomal enzyme involved in breaking down glycosaminoglycans. When both gene copies carry the tested variant, this breakdown pathway can be severely disrupted. Storage of these substances in tissues leads to a progressive lysosomal storage disorder.

What does this condition mean?

MPS VI can affect the skeleton, joints, connective tissue, eyes and general development. Affected dogs may show poor growth, stiffness or abnormal movement, joint problems, abnormal body conformation, corneal clouding, breathing difficulty and reduced mobility. Severity and age of onset can vary between dogs.

Inheritance and result

The trait is inherited as autosomal recessive. One copy makes a dog a carrier; two copies cause the genetically affected result for this variant.

• GG means the dog does not carry the tested variant.
• GA means the dog is a carrier and can pass the variant to offspring.
• AA means the dog has two copies of the variant and is genetically affected for MPS VI caused by this variant.

Practical value of this test

This test gives breeders and owners clear information about the ARSB status of a Miniature Pinscher. It is especially useful because carriers can look healthy while still passing the variant to the next generation.

• Breeders can identify carriers and avoid combinations that can produce affected puppies.
• The result supports purchase decisions, sales transparency, breeding plans and management of risk lines within the breed.
• For relatives of an affected or carrier dog, the test provides a fast and concrete genetic check.
• The result helps preserve valuable healthy breeding lines while preventing unnoticed spread of the variant.