Evidence map›Paper›PMID 22886306›Full record

ArticleThe Journal of clinical investigation2012

PTH-independent regulation of blood calcium concentration by the calcium-sensing receptor.

Alexandre Loupy, Suresh Krishna Ramakrishnan, Bharath Wootla, Régine Chambrey, Renaud de la Faille, Soline Bourgeois, Patrick Bruneval, Chantal Mandet, Erik Ilso Christensen, Hélène Faure and 7 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed, 1 pooled it
10.5field-weighted citation impact, top 1% 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

88 citing papers in PubMed, 1 synthesis or guideline pooled it, 199 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Review
  7. Calcium-Sensing Receptor in the Thick Ascending Limb and Renal Response to Hypercalcemia.Journal of the American Society of Nephrology : JASN · 2025
    Article
  8. Review
  9. Review
  10. Article
  11. Calcium signalling and transport in the kidney.Nature reviews. Nephrology · 2024
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Article
  19. Article
  20. Thirty years of the NaCl cotransporter: from cloning to physiology and structure.American journal of physiology. Renal physiology · 2023
    Review

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors at 9 institutions in 3 countries.

Alexandre LoupyINSERM UMRS 872, Centre de Recherche des Cordeliers, Paris, France.
Suresh Krishna Ramakrishnan
Bharath Wootla
Régine Chambrey
Renaud de la Faille
Soline Bourgeois
Patrick Bruneval
Chantal Mandet
Erik Ilso Christensen
Hélène Faure
Lydie Cheval
Kamel Laghmani
Corinne Collet
Dominique Eladari
Robert H Dodd
Martial Ruat
Pascal Houillier
Centre National de la Recherche Scientifique · FRDélégation Paris 5 · FRParis Cardiovascular Research Center · FRAarhus University Hospital · DKCentre de Recherche des Cordeliers · FRHôpital Lariboisière · FRInserm · FRService de la Santé Publique · CHUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tight regulation of calcium levels is required for many critical biological functions. The Ca2+-sensing receptor (CaSR) expressed by parathyroid cells controls blood calcium concentration by regulating parathyroid hormone (PTH) secretion. However, CaSR is also expressed in other organs, such as the kidney, but the importance of extraparathyroid CaSR in calcium metabolism remains unknown. Here, we investigated the role of extraparathyroid CaSR using thyroparathyroidectomized, PTH-supplemented rats. Chronic inhibition of CaSR selectively increased renal tubular calcium absorption and blood calcium concentration independent of PTH secretion change and without altering intestinal calcium absorption. CaSR inhibition increased blood calcium concentration in animals pretreated with a bisphosphonate, indicating that the increase did not result from release of bone calcium. Kidney CaSR was expressed primarily in the thick ascending limb of the loop of Henle (TAL). As measured by in vitro microperfusion of cortical TAL, CaSR inhibitors increased calcium reabsorption and paracellular pathway permeability but did not change NaCl reabsorption. We conclude that CaSR is a direct determinant of blood calcium concentration, independent of PTH, and modulates renal tubular calcium transport in the TAL via the permeability of the paracellular pathway. These findings suggest that CaSR inhibitors may provide a new specific treatment for disorders related to impaired PTH secretion, such as primary hypoparathyroidism.

Indexed as

Amino AcidsAnimalsBone Density Conservation AgentsCalciumCreatinineDiphosphonatesHypoparathyroidismLoop of HenleMaleNaphthalenesOsteocalcinPamidronateParathyroidectomyParathyroid HormonePermeabilityRatsAmino AcidsBone Density Conservation AgentsCalciumCreatininedeoxypyridinolineDiphosphonatesN-(2-hydroxy-3-(2-cyano-3-chlorophenoxy)propyl)-1,1-dimethyl-2-(2-nephthyl)ethylamineNaphthalenesOsteocalcinPamidronateParathyroid HormoneReceptors, Calcium-SensingSlc12a1 protein, ratSodium-Potassium-Chloride SymportersSodium-Potassium-Exchanging ATPaseSolute Carrier Family 12, Member 1

Identifiers

PMID22886306
PMCPMC3428075
OpenAlexW2085905914

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.