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Distal renal tubular acidosis with deafness (ATP6V1B1-related)

Distal renal tubular acidosis (with deafness) is a condition that causes kidney (renal) problems and hearing loss. The kidneys function to filter fluid and waste products from the body and remove them in urine. In affected individuals, the kidneys do not remove enough acidic compounds from the body, leading to a buildup of harmful compounds in the blood, making it too acidic. Symptoms vary but usually present during infancy and may include feeding problems, nausea, vomiting, dehydration, poor growth (failure to thrive), short stature, and softening or weakening of the bones. Some affected individuals develop kidney stones or chronic kidney disease; however, most do not experience kidney failure.

During childhood or young adulthood, most affected individuals have progressive hearing loss caused by damage to structures in the inner ear (sensorineural hearing loss). The severity of hearing loss ranges from mild to profound.

Treatment is focused on managing specific symptoms.

Quick facts about distal renal tubular acidosis with deafness (ATP6V1B1-related)
Genes: ATP6V1B1
Inheritance: Autosomal Recessive
Relevant resources for distal renal tubular acidosis with deafness (ATP6V1B1-related)

A quick genetics rundown

As humans we have about 23,000 genes. These genes are like tiny instruction manuals that influence our health, growth and development. We inherit half of our genes from our biological mum and the other half from our biological dad. These genes are lined up on structures called chromosomes. Most of us have 23 pairs of chromosomes. The first 22 pairs are called autosomes and for the most part - these are the same among men and women. The 23rd pair determine our sex - two X chromosomes for a female and one X and one Y chromosome for males.

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How is distal renal tubular acidosis with deafness (ATP6V1B1-related) inherited?

distal renal tubular acidosis with deafness (ATP6V1B1-related) is known as an autosomal recessive condition. For autosomal recessive conditions, if a person has a variation in one copy of their gene, they are a carrier. This means that they are healthy because they also have a working copy of the gene. But, they can still pass their non-working copy to their child.

If the other parent also happens to be a carrier of the same gene, there is a 25% (1 in 4) chance that they both pass this gene variation on to their child — and as such, have a child affected by the condition.

If both parents are carriers of distal renal tubular acidosis with deafness (ATP6V1B1-related), there's a one in four chance that their children could develop symptoms.

What is carrier screening?

Carrier testing is like a checkup for your genes. It tests to see if you carry a gene variation that could cause a serious genetic condition in your child. Eugene offers an inclusive genetic carrier screening panel that includes distal renal tubular acidosis with deafness (ATP6V1B1-related), but there's a total 301 conditions that can be tested.

Eugene's carrier test is a clinical grade test that can be done from the comfort of your own home — it's just a saliva test. You're also paired with a genetic counsellor who provides mindful support and guidance every step of the way.

Learn more about carrier screening

Should parents screen for distal renal tubular acidosis with deafness (ATP6V1B1-related) before or early in pregnancy?

The biggest benefit of screening for distal renal tubular acidosis with deafness (ATP6V1B1-related) is that it can help future parents understand their reproductive risk so they can be ready and empowered to make more informed decisions. If neither partner are carriers, it provides reassurance and peace of mind that the risk of having a child with a genetic condition is low.

Since 90% of children that have a recessive genetic condition like distal renal tubular acidosis with deafness (ATP6V1B1-related) had no previous family history of it, it often feels completely out of the blue for the parents. Getting screened is a way to know this risk in advance, which can help familes manage or even prevent the condition in the first place.