Overview
Defect in V-ATPase refers to a group of rare genetic conditions caused by problems with a cellular machine called the vacuolar ATPase (V-ATPase). V-ATPases are protein pumps found in many types of cells throughout the body. Their main job is to control the acid levels inside cells and in certain body compartments. They play a critical role in many organs, including the kidneys, bones, inner ear, and brain. When V-ATPase does not work properly, the body struggles to maintain the right acid-base balance. This can lead to a range of problems depending on which specific part of the V-ATPase complex is affected. Common consequences include a condition called distal renal tubular acidosis, where the kidneys cannot properly remove acid from the blood. This leads to a buildup of acid in the body, which can cause poor growth, kidney stones, weakened bones, and in some cases hearing loss. Some forms of V-ATPase defects also affect bone cells called osteoclasts, leading to a condition known as osteopetrosis, where bones become abnormally dense but brittle. Treatment is mainly supportive and focuses on correcting the acid imbalance with oral alkali supplements such as bicarbonate or citrate. Hearing aids or cochlear implants may be needed for hearing loss. Early diagnosis and consistent treatment can significantly improve quality of life and prevent complications like kidney damage and growth failure.
Key symptoms:
Poor growth or failure to thrive in infancyExcessive acid in the blood (metabolic acidosis)Kidney stonesCalcium deposits in the kidneysHearing loss, often progressiveWeakened or softened bones (rickets or osteomalacia)Abnormally dense but fragile bones (osteopetrosis in some forms)Frequent vomiting or poor feeding in babiesMuscle weaknessExcessive thirst and urinationDelayed growth milestonesLow potassium levelsFatigue and low energyBone fractures with minimal trauma
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for Defect in V-ATPase.
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Specialists
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Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Defect in V-ATPase.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.Which specific gene is affected in my child, and what does that mean for the expected course of the disease?,How often should blood tests and kidney function be monitored?,What is the best alkali supplement and dose for my child, and how should it be adjusted during illness?,Should my child have regular hearing tests, and at what age might hearing aids or cochlear implants be needed?,Are there any dietary changes that could help manage this condition?,What are the warning signs that would require an emergency room visit?,Are there any clinical trials or new treatments being studied for this condition?
Common questions about Defect in V-ATPase
What is Defect in V-ATPase?
Defect in V-ATPase refers to a group of rare genetic conditions caused by problems with a cellular machine called the vacuolar ATPase (V-ATPase). V-ATPases are protein pumps found in many types of cells throughout the body. Their main job is to control the acid levels inside cells and in certain body compartments. They play a critical role in many organs, including the kidneys, bones, inner ear, and brain. When V-ATPase does not work properly, the body struggles to maintain the right acid-base balance. This can lead to a range of problems depending on which specific part of the V-ATPase compl
How is Defect in V-ATPase inherited?
Defect in V-ATPase follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Defect in V-ATPase typically begin?
Typical onset of Defect in V-ATPase is infantile. Age of onset can vary across affected individuals.