Calcium-sensing receptor gene polymorphisms in patients with calcium nephrolithiasis

Giuseppe Vezzoli, Annalisa Terranegra, Laura Soldati

Research output: Contribution to journalReview article

23 Citations (Scopus)

Abstract

Purpose of review: The calcium-sensing receptor gene (CaSR, chr. 3q13.3-21) is a candidate to explain nephrolithiasis. This review analyzes the potential role of CaSR in lithogenesis according to findings of functional and genetic studies. Recent findings: CaSR is a cation receptor located in the tubular cell plasma membrane. Its activation decreases calcium reabsorption in the ascending limb and distal convoluted tubule, but increases phosphate reabsorption in proximal tubules and decreases water and proton reabsorption in collecting ducts. Its effects in proximal tubules and collecting ducts can limit the calcium phosphate precipitation risk induced by the increase in calcium excretion. The nonconservative CaSR gene Arg990Gly polymorphism was associated with nephrolithiasis and hypercalciuria in different populations. Arg990Gly is located on exon 7 and produces a gain of the CaSR function. rs7652589 and rs1501899 were also associated with nephrolithiasis in patients with normal citrate excretion. These polymorphisms are located in the CaSR gene regulatory region and may modify CaSR gene promoter activity. Summary: The activating Arg990Gly polymorphism may predispose to nephrolithiasis by increasing calcium excretion. Polymorphisms at the regulatory region may predispose to nephrolithiasis by changing tubular expression of the CaSR. CaSR genotype may be a marker to identify patients prone to develop calcium nephrolithiasis.

Original languageEnglish
Pages (from-to)355-361
Number of pages7
JournalCurrent Opinion in Nephrology and Hypertension
Volume21
Issue number4
DOIs
Publication statusPublished - Jul 2012
Externally publishedYes

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Keywords

  • calcium-sensing receptor
  • gene expression
  • gene polymorphism
  • hypercalciuria
  • nephrolithiasis

ASJC Scopus subject areas

  • Internal Medicine
  • Nephrology

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