Evidence map›Paper›PMID 30795852›Full record

Trial reportKidney international2019

Increased production and reduced urinary buffering of acid in uric acid stone formers is ameliorated by pioglitazone.

Naim M Maalouf, John R Poindexter, Beverley Adams-Huet, Orson W Moe, Khashayar Sakhaee

Open access · bronzeAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Kidney international, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

22 citing papers in PubMed, 36 citations in OpenAlex.

  1. Article
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  9. Review
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  17. Article
  18. UPDATE - Canadian Urological Association guideline: Evaluation and medical management of kidney stones.Canadian Urological Association journal = Journal de l'Association des urologues du Canada · 2022
    Article
  19. Update on Uric Acid and the Kidney.Current rheumatology reports · 2022
    Review
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Naim M MaaloufDepartment of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
John R PoindexterCharles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Beverley Adams-HuetCharles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Orson W MoeDepartment of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Physiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Khashayar SakhaeeDepartment of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA. Electronic address: Khashayar.sakhaee@utsouthwestern.edu.
The University of Texas Southwestern Medical Center · USSouthwestern Medical Center · US

Funding

UT Southwestern Center for Translational Medicine (UL1/KL2/TL1)UL1TR001105 · NCATS · UT SOUTHWESTERN MEDICAL CENTER · PI TOTO, ROBERT DANIEL · 2013 to 2017
$24.5M
Pathogenesis of Uric Acid Nephrolithiasis: The Multifaceted Role of Renal LipidsR01DK081423 · NIDDK · UT SOUTHWESTERN MEDICAL CENTER · PI MAALOUF, NAIM M, MOE, ORSON W · 2009 to 2023
$6.1M
NCATS NIH HHS UL1 TR001105NIDDK NIH HHS R01 DK081423
6 · The paper itself

Abstract

Idiopathic uric acid nephrolithiasis is characterized by an overly acidic urine pH caused by the combination of increased acid production and inadequate buffering of urinary protons by ammonia. A large proportion of uric acid stone formers exhibit features of the metabolic syndrome. We previously demonstrated that thiazolidinediones improved the urinary biochemical profile in an animal model of the metabolic syndrome. In this proof-of-concept study, we examined whether the thiazolidinedione pioglitazone can also ameliorate the overly acidic urine in uric acid stone formers. Thirty-six adults with idiopathic uric acid nephrolithiasis were randomized to pioglitazone 30 mg/day or matching placebo for 24 weeks. At baseline and study end, participants underwent collection of blood and 24-hour urine in an inpatient research unit while consuming a fixed metabolic diet, followed by assessment of the ammoniagenic response to an acute oral acid load. Twenty-eight participants completed the study. Pioglitazone treatment improved features of the metabolic syndrome. Pioglitazone also reduced net acid excretion and increased urine pH (5.37 to 5.59), the proportion of net acid excreted as ammonium, and ammonium excretion in response to an acute acid load, whereas these parameters were unchanged with placebo. Treatment of patients with idiopathic uric acid nephrolithiasis with pioglitazone for 24 weeks led to a reduction in the acid load presented to the kidney and a more robust ammoniagenesis and ammonium excretion, resulting in significantly higher urine pH. Future studies should consider the impact of this targeted therapy on uric acid stone formation.

Indexed as

AdultAgedAmmonium CompoundsFemaleHumansHydrogen-Ion ConcentrationKidney CalculiMaleMiddle AgedPioglitazoneProof of Concept StudyRenal EliminationUric AcidAmmonium CompoundsPioglitazoneUric Acidinsulin resistancemetabolic syndromenephrolithiasispioglitazonethiazolidinedioneuric acid

Identifiers

PMID30795852
PMCPMC6478507
OpenAlexW2913809585

What OpenQuestion holds

Textmetadata
LicenceTDM
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.