- Conference date: 17–18 April 2008
- Location: Indianapolis (Indiana)
Calcium stones are commonly encountered in patients with congenital distal renal tubular acidosis, a disease of renal acidification caused by mutations in either the vacuolar ‐ATPase (B1 or a4 subunit), anion exchanger‐1, or carbonic anhydrase II. Based on the existing database, we present two hypotheses. First, heterozygotes with mutations in B1 subunit of ‐ATPase are not normal but may harbor biochemical abnormalities such as renal acidification defects, hypercalciuria, and hypocitraturia which can predispose them to kidney stone formation. Second, we propose at least two mechanisms by which mutant B1 subunit can impair ‐ATPase: defective pump assembly and defective pump activity.
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