Evidence map›Paper›PMID 25855777›Full record

ArticleJournal of the American Society of Nephrology : JASN2015

Effect of Potassium Citrate on Calcium Phosphate Stones in a Model of Hypercalciuria.

Nancy S Krieger, John R Asplin, Kevin K Frick, Ignacio Granja, Christopher D Culbertson, Adeline Ng, Marc D Grynpas, David A Bushinsky

Open access · greenAbstract read
In one paragraph

Article in Journal of the American Society of Nephrology : JASN, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
5.5field-weighted citation impact, top 4% 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

35 citing papers in PubMed, 1 synthesis or guideline pooled it, 71 citations in OpenAlex.

  1. Guideline
  2. Trial
  3. Review
  4. Review
  5. Mechanistic studies of CaScientific reports · 2025
    Article
  6. Article
  7. Article
  8. Current Dietary and Medical Prevention of Renal Calcium Oxalate Stones.International journal of general medicine · 2024
    Review
  9. Article
  10. Review
  11. Article
  12. Urinary stone disease in Syrian children.Pediatric nephrology (Berlin, Germany) · 2023
    Article
  13. Kidney Stone Prevention.Advances in nutrition (Bethesda, Md.) · 2023
    Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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

8 authors at 4 institutions in 2 countries.

Nancy S KriegerDivision of Nephrology, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York; Nancy_Krieger@urmc.rochester.edu.
John R AsplinLitholink Corporation, Laboratory Corporation of America Holdings, Chicago, Illinois; and.
Kevin K FrickDivision of Nephrology, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York;
Ignacio GranjaLitholink Corporation, Laboratory Corporation of America Holdings, Chicago, Illinois; and.
Christopher D CulbertsonDivision of Nephrology, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York;
Adeline NgLaboratory Medicine and Pathobiology Department, University of Toronto, Toronto, Ontario, Canada.
Marc D GrynpasLaboratory Medicine and Pathobiology Department, University of Toronto, Toronto, Ontario, Canada.
David A BushinskyDivision of Nephrology, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York;
University of Rochester · USUniversity of Toronto · CALabCorp (United States) · USLink Foundation · US

Funding

Hypercalciuria and Bone Quality in the Genetic Hypercalciuric Stone-Forming RatsR01DK075462 · NIDDK · UNIVERSITY OF ROCHESTER · PI BUSHINSKY, DAVID A · 2008 to 2019
$3.8M
NIDDK NIH HHS R01 DK075462NIDDK NIH HHS R01-DK075462
6 · The paper itself

Abstract

Potassium citrate is prescribed to decrease stone recurrence in patients with calcium nephrolithiasis. Citrate binds intestinal and urine calcium and increases urine pH. Citrate, metabolized to bicarbonate, should decrease calcium excretion by reducing bone resorption and increasing renal calcium reabsorption. However, citrate binding to intestinal calcium may increase absorption and renal excretion of both phosphate and oxalate. Thus, the effect of potassium citrate on urine calcium oxalate and calcium phosphate supersaturation and stone formation is complex and difficult to predict. To study the effects of potassium citrate on urine supersaturation and stone formation, we utilized 95th-generation inbred genetic hypercalciuric stone-forming rats. Rats were fed a fixed amount of a normal calcium (1.2%) diet supplemented with potassium citrate or potassium chloride (each 4 mmol/d) for 18 weeks. Urine was collected at 6, 12, and 18 weeks. At 18 weeks, stone formation was visualized by radiography. Urine citrate, phosphate, oxalate, and pH levels were higher and urine calcium level was lower in rats fed potassium citrate. Furthermore, calcium oxalate and calcium phosphate supersaturation were higher with potassium citrate; however, uric acid supersaturation was lower. Both groups had similar numbers of exclusively calcium phosphate stones. Thus, potassium citrate effectively raises urine citrate levels and lowers urine calcium levels; however, the increases in urine pH, oxalate, and phosphate levels lead to increased calcium oxalate and calcium phosphate supersaturation. Potassium citrate induces complex changes in urine chemistries and resultant supersaturation, which may not be beneficial in preventing calcium phosphate stone formation.

Indexed as

AnimalsCalciumCalcium, DietaryCalcium OxalateCalcium PhosphatesCitric AcidDisease Models, AnimalDiureticsHydrogen-Ion ConcentrationHypercalciuriaKidney CalculiMalePotassium ChloridePotassium CitrateRatsUric AcidCalciumCalcium, DietaryCalcium Oxalatecalcium phosphateCalcium PhosphatesCitric AcidDiureticsPotassium ChloridePotassium CitrateUric Acidhypercalciuriakidney stonesmineral metabolism

Identifiers

PMID25855777
PMCPMC4657843
OpenAlexW2155000308

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.