Evidence map›Paper›PMID 34934934›Full record

ArticleEClinicalMedicine2022

Measurement of glomerular filtration rate using endogenous d-serine clearance in living kidney transplant donors and recipients.

Masataka Kawamura, Atsushi Hesaka, Ayumu Taniguchi, Shigeaki Nakazawa, Toyofumi Abe, Makoto Hirata, Ryuichi Sakate, Masaru Horio, Shiro Takahara, Norio Nonomura and 3 more

Open access · goldAbstract read
In one paragraph

Article in EClinicalMedicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
2.2field-weighted citation impact, top 14% 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

13 citing papers in PubMed, 21 citations in OpenAlex.

  1. Review
  2. Review
  3. Sources and Metabolism of D-Amino Acids and Their Roles as Biomarkers in Kidney Disease: A Review.Medical science monitor : international medical journal of experimental and clinical research · 2026
    Review
  4. Review
  5. Article
  6. d-Alanine, a Circadian Metabolite that Regulates Glucose Metabolism and Viral Infection.Chembiochem : a European journal of chemical biology · 2025
    Review
  7. Article
  8. Article
  9. D-Serine as a sensor and effector of the kidney.Clinical and experimental nephrology · 2023
    Review
  10. Article
  11. Article
  12. Review
  13. 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

13 authors at 3 institutions in 1 country.

Masataka KawamuraDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Atsushi HesakaKAGAMI Project, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.
Ayumu TaniguchiDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Shigeaki NakazawaDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Toyofumi AbeDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Makoto HirataLaboratory of Rare Disease Resource library, Center for Rare Disease Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN).
Ryuichi SakateLaboratory of Rare Disease Resource library, Center for Rare Disease Research, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN).
Masaru HorioDepartment of Nephrology, Kansai Medical Hospital, Osaka, Japan.
Shiro TakaharaDepartment of Renal Transplantation, Kansai Medical Hospital, Osaka, Japan.
Norio NonomuraDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Yoshitaka IsakaDepartment of Nephrology, Osaka University Graduate School of Medicine, Osaka, Japan.
Ryoichi ImamuraDepartment of Urology, Osaka University Graduate School of Medicine, Suita, Japan.
Tomonori KimuraKAGAMI Project, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.
The University of Osaka · JPNational Institute of Biomedical Innovation, Health and Nutrition · JPKansai Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEndogenous molecules that provide an unbiased and a precise evaluation of kidney function are still necessary. We explored the potential of clearance of d-serine, a rare enantiomer of serine and a biomarker of kidney function, as a measure of glomerular filtration rate (GFR).

methodsThis was a cross-sectional observational study of 200 living kidney transplant donors and recipients enrolled between July 2019 and December 2020 in a single Japanese center, for whom GFR was measured by clearance of inulin (C-in). Clearance of d-serine (C-dSer) was calculated based on blood and urine levels of d-serine, as measured by two-dimensional high-performance liquid chromatography. Analytical performance was assessed by calculating biases. Utilizing data from 129 participants, we developed equations for C-in based on C-dSer and C-cre using a linear regression model, and the performance was validated in 68 participants.

findingsThe means of C-in and C-dSer were 66.7 and 55.7 mL/min/1.73 m

interpretationThe smaller proportional bias compared to that of C-cre is an advantage of C-dSer as a measure of C-in. Combinational measurement of d-serine and creatinine, two endogenous molecules, has the potential to serve as a measure of GFR with precision and minor biases and can support important clinical decisions.

fundingJapan Society for the Promotion of Science (JSPS, grant number 17H04188), Japan Agency of Medical Research and Development (AMED, JP20gm5010001), Osaka Kidney Bank (OKF19-0010), Shiseido Co., Ltd and KAGAMI Inc.

Indexed as

2D-HPLC, two-dimensional high-performance liquid chromatographyC-cre, clearance of creatinineC-dSer, clearance of d-serineCI, confidence interavalC-in, clearance of inulinCKD, chronic kidney diseaseCreatinine clearanced-Serined-Serine clearanceeGFR, estimated glomerular filtration rateGFR, glomerular filtration rateGlomerular filtration rateKidney transplantationmGFR, measure glomerular filtration ratesCre, serum creatininesCys, serum cystatin C

Identifiers

PMID34934934
PMCPMC8654629
OpenAlexW4200025477

What OpenQuestion holds

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LicenceCC BY
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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.