Evidence map›Paper›PMID 22581996›Full record

ArticleJournal of the American Society of Nephrology : JASN2012

Calcium deficiency reduces circulating levels of FGF23.

María E Rodriguez-Ortiz, Ignacio Lopez, Juan R Muñoz-Castañeda, Julio M Martinez-Moreno, Alan Peralta Ramírez, Carmen Pineda, Antonio Canalejo, Philippe Jaeger, Escolastico Aguilera-Tejero, Mariano Rodriguez and 2 more

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 95 papers.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed
13.0field-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

95 citing papers in PubMed, 210 citations in OpenAlex.

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  4. Acute and 3-month effects of calcium carbonate on the calcification propensity of serum and regulators of vascular calcification: secondary analysis of a randomized controlled trial.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2016
    Trial
  5. Lack of FGF23 response to acute changes in serum calcium and PTH in humans.The Journal of clinical endocrinology and metabolism · 2014
    Trial
  6. A comparison of calcium acetate/magnesium carbonate and sevelamer-hydrochloride effects on fibroblast growth factor-23 and bone markers: post hoc evaluation from a controlled, randomized study.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2013
    Trial
  7. Review
  8. Emerging concepts on the FGF23 regulation and activity.Molecular and cellular biochemistry · 2025
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  19. Phosphate as a Pathogen of Arteriosclerosis and Aging.Journal of atherosclerosis and thrombosis · 2021
    Review
  20. C-Terminal, but Not Intact, FGF23 and EPO Are Strongly Correlatively Elevated in Patients With Gain-of-Function Mutations in HIF2A: Clinical Evidence for EPO Regulating FGF23.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2021
    Article

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

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 6 institutions in 4 countries.

María E Rodriguez-OrtizResearch Unit, IMIBIC, Hospital Universitario Reina Sofia, Cordoba, Spain.
Ignacio Lopez
Juan R Muñoz-Castañeda
Julio M Martinez-Moreno
Alan Peralta Ramírez
Carmen Pineda
Antonio Canalejo
Philippe Jaeger
Escolastico Aguilera-Tejero
Mariano Rodriguez
Arnold Felsenfeld
Yolanda Almaden
Instituto Maimónides de Investigación Biomédica de Córdoba · ESUniversity of Córdoba · ESUniversidad de Huelva · ESUniversidad Nacional Autónoma de Nicaragua-León · NIUniversity College London · GBUniversity of California, Los Angeles · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fibroblast growth factor (FGF) 23 inhibits calcitriol production, which could exacerbate calcium deficiency or hypocalcemia unless calcium itself modulates FGF23 in this setting. In Wistar rats with normal renal function fed a diet low in both calcium and vitamin D, the resulting hypocalcemia was associated with low FGF23 despite high parathyroid hormone (PTH) and high calcitriol levels. FGF23 correlated positively with calcium and negatively with PTH. Addition of high dietary phosphorus to this diet increased FGF23 except in rats with hypocalcemia despite high PTH levels. In parathyroidectomized rats, an increase in dietary calcium for 10 days increased serum calcium, with an associated increase in FGF23, decrease in calcitriol, and no change in phosphorus. Also in parathyroidectomized rats, FGF23 increased significantly 6 hours after administration of calcium gluconate. Taken together, these results suggest that hypocalcemia reduces the circulating concentrations of FGF23. This decrease in FGF23 could be a response to avoid a subsequent reduction in calcitriol, which could exacerbate hypocalcemia.

Indexed as

AnimalsCalcitriolCalciumCalcium GluconateFibroblast Growth FactorsHypocalcemiaMaleModels, AnimalParathyroidectomyParathyroid HormonePhosphorus, DietaryRatsRats, WistarVitamin DCalcitriolCalciumCalcium GluconateFgf23 protein, ratFibroblast Growth FactorsParathyroid HormonePhosphorus, DietaryVitamin D

Identifiers

PMID22581996
PMCPMC3380648
OpenAlexW2127828880

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.