Is Dent Disease hereditary?

Dent Disease is a rare, hereditary X-linked recessive disorder caused by mutations in specific genes that affect kidney function. Because it is an X-linked condition, it is primarily inherited from mothers to their sons, though spontaneous mutations can also occur.

Is Dent Disease hereditary?

Yes, Dent Disease is a hereditary condition, meaning it is passed down through families via genetic mutations. It is specifically an X-linked recessive disorder, which means the gene responsible is located on the X chromosome. Because males have only one X chromosome, they are almost exclusively the individuals who manifest symptoms of Dent Disease, while females are typically asymptomatic carriers.

What is the inheritance pattern and risk?

In families with a known mutation, the risk of inheritance depends on the sex of the child:

• For sons of a carrier mother: Each son has a 50% chance of inheriting the mutation and developing Dent Disease.


• For daughters of a carrier mother: Each daughter has a 50% chance of being a carrier, but they rarely show clinical symptoms of the disease.


• For children of an affected father: All daughters will inherit the mutation and become carriers, while all sons will be unaffected, as the father passes his Y chromosome to his sons.

Are de novo mutations common in Dent Disease?

While Dent Disease is usually inherited, approximately 30% to 50% of cases are considered de novo. This means the genetic mutation occurs spontaneously in the affected individual for the first time, with no family history of the condition. Genetic testing is essential to confirm these mutations in either the CLCN5 or OCRL1 genes.

What is the role of genetic counseling?

Genetic counseling is highly recommended for families affected by Dent Disease. A genetic counselor can help interpret test results, calculate recurrence risks, and explain reproductive options, such as preimplantation genetic testing (PGT) or prenatal diagnosis. Currently, 10 people with Dent Disease have joined the DiseaseMaps community, providing a space to share experiences with this complex genetic journey.

Next steps

• Consult with a clinical geneticist to discuss molecular genetic testing for CLCN5 or OCRL1 mutations.


• Speak with a genetic counselor before planning a pregnancy to understand inheritance risks.


• Connect with others navigating this condition by joining the community at DiseaseMaps.org.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice; please consult a qualified healthcare provider for diagnosis and treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Dent Disease


• Orphanet: X-linked recessive nephrolithiasis


• OMIM (Online Mendelian Inheritance in Man): Dent Disease 1 and 2


• The Dent Disease Foundation