Evidence map›Paper›PMID 22997254›Full record

ArticleJournal of the American Society of Nephrology : JASN2012

Deficiency of the calcium-sensing receptor in the kidney causes parathyroid hormone-independent hypocalciuria.

Hakan R Toka, Khaldoun Al-Romaih, Jacob M Koshy, Salvatore DiBartolo, Claudine H Kos, Stephen J Quinn, Gary C Curhan, David B Mount, Edward M Brown, Martin R Pollak

Open access · bronzeAbstract read
In one paragraph

Article in Journal of the American Society of Nephrology : JASN, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed
8.1field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

62 citing papers in PubMed, 144 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Hypercalcemia's Hidden Regulator: Calcium-Sensing Receptor and the Kidney's Secret Weapon.Journal of the American Society of Nephrology : JASN · 2025
    Article
  5. Calcium-Sensing Receptor in the Thick Ascending Limb and Renal Response to Hypercalcemia.Journal of the American Society of Nephrology : JASN · 2025
    Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Nephrocalcinosis in a 3-year-old child with hypocalcemia: Answers.Pediatric nephrology (Berlin, Germany) · 2023
    Article
  14. Article
  15. Article
  16. Review
  17. Molecular mechanisms altering tubular calcium reabsorption.Pediatric nephrology (Berlin, Germany) · 2022
    Review
  18. Acute kidney injury in cancer patients.Clinical and experimental nephrology · 2022
    Review
  19. Association study ofOpen life sciences · 2022
    Article
  20. Article

2 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

Hakan R TokaDivision of Nephrology, Beth Israel Medical Center, 330 Brookline Avenue, Boston, MA 02115, USA.
Khaldoun Al-Romaih
Jacob M Koshy
Salvatore DiBartolo
Claudine H Kos
Stephen J Quinn
Gary C Curhan
David B Mount
Edward M Brown
Martin R Pollak
Beth Israel Deaconess Medical Center · USBrigham and Women's Hospital · USKing Faisal Specialist Hospital & Research Centre · SAPediatric Nephrology of Alabama · US

Funding

The Pathobiology of NephrolithiasisP01DK070756 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI MOUNT, DAVID BRUCE · 2007 to 2011
$8.4M
Ca2+-Sensing Receptor: Novel Roles in Calcium HomeostasisR01DK078331 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI BROWN, EDWARD M · 2008 to 2011
$1.4M
NIDDK NIH HHS DK078331NIDDK NIH HHS P01 DK070756NIDDK NIH HHS P01 DK70756NIDDK NIH HHS R01 DK078331
6 · The paper itself

Abstract

Rare loss-of-function mutations in the calcium-sensing receptor (Casr) gene lead to decreased urinary calcium excretion in the context of parathyroid hormone (PTH)-dependent hypercalcemia, but the role of Casr in the kidney is unknown. Using animals expressing Cre recombinase driven by the Six2 promoter, we generated mice that appeared grossly normal but had undetectable levels of Casr mRNA and protein in the kidney. Baseline serum calcium, phosphorus, magnesium, and PTH levels were similar to control mice. When challenged with dietary calcium supplementation, however, these mice had significantly lower urinary calcium excretion than controls (urinary calcium to creatinine, 0.31±0.03 versus 0.63±0.14; P=0.001). Western blot analysis on whole-kidney lysates suggested an approximately four-fold increase in activated Na(+)-K(+)-2Cl(-) cotransporter (NKCC2). In addition, experimental animals exhibited significant downregulation of Claudin14, a negative regulator of paracellular cation permeability in the thick ascending limb, and small but significant upregulation of Claudin16, a positive regulator of paracellular cation permeability. Taken together, these data suggest that renal Casr regulates calcium reabsorption in the thick ascending limb, independent of any change in PTH, by increasing the lumen-positive driving force for paracellular Ca(2+) transport.

Indexed as

AnimalsBase SequenceCalciumClaudinsHomeodomain ProteinsKidneyMiceMice, 129 StrainMice, Inbred C57BLMice, KnockoutParathyroid HormonePromoter Regions, GeneticReceptors, Calcium-SensingRNA, MessengerSodium-Potassium-Chloride SymportersSolute Carrier Family 12, Member 1Calciumclaudin 14claudin 16ClaudinsHomeodomain ProteinsParathyroid HormoneReceptors, Calcium-SensingRNA, MessengerSix2 protein, mouseSlc12a1 protein, mouseSodium-Potassium-Chloride SymportersSolute Carrier Family 12, Member 1Transcription Factors

Identifiers

PMID22997254
PMCPMC3482734
OpenAlexW2163471722

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.