Evidence map›Paper›PMID 20711718›Full record

ArticleDiabetologia2010

A polymorphism in the gene encoding carnosinase (CNDP1) as a predictor of mortality and progression from nephropathy to end-stage renal disease in type 1 diabetes mellitus.

A Alkhalaf, S J L Bakker, H J G Bilo, R O B Gans, G J Navis, D Postmus, C Forsblom, P H Groop, N Vionnet, S Hadjadj and 4 more

Open access · hybridAbstract readMulticenter Study
In one paragraph

Article in Diabetologia, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.2field-weighted citation impact, top 22% 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

18 citing papers in PubMed, 28 citations in OpenAlex.

  1. CNDP1 (CTG)Scientific reports · 2026
    Article
  2. Review
  3. Histidine-Containing Dipeptides in Obesity and Cardiometabolic Health: A Systematic Scoping Review.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
    Article
  4. Article
  5. Review
  6. Article
  7. Review
  8. Review
  9. Serum Carnosinase-1 and Albuminuria Rather than theJournal of diabetes research · 2019
    Article
  10. Review
  11. Article
  12. Review
  13. TheJournal of diabetes research · 2017
    Article
  14. Association of CTG repeat polymorphism in carnosine dipeptidase 1 (The Indian journal of medical research · 2016
    Article
  15. Article
  16. Article
  17. Article
  18. 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

14 authors at 8 institutions in 4 countries.

A AlkhalafDepartment of Internal Medicine, University Medical Center Groningen, Hanzeplein 1, PO Box 30.001, 9700 RB Groningen, The Netherlands. a.alkhalaf@int.umcg.nl
S J L Bakker
H J G Bilo
R O B Gans
G J Navis
D Postmus
C Forsblom
P H Groop
N Vionnet
S Hadjadj
M Marre
H H Parving
P Rossing
L Tarnow
University Medical Center Groningen · NLFolkhälsans Forskningscentrum · FISteno Diabetes Center · DKAarhus University · DKIsala · NLSorbonne Université · FRUniversité Claude Bernard Lyon 1 · FRUniversité de Poitiers · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aims/hypothesisHomozygosity for a five leucine repeat (5L-5L) in the carnosinase gene (CNDP1) has been found to be cross-sectionally associated with a low frequency of diabetic nephropathy (DN), mainly in type 2 diabetes. We prospectively investigated in patients with type 1 diabetes whether: (1) 5L-5L is associated with mortality; (2) there is an interaction of 5L-5L with DN or sex for prediction of mortality; and (3) 5L-5L is associated with progression to end-stage renal disease (ESRD).

methodsIn this prospective study in white European patients with type 1 diabetes, individuals with DN were defined by persistent albuminuria ≥ 300 mg/24 h. Controls without nephropathy were defined by persistent (>15 years) normoalbuminuria < 30 mg/24 h. Leucine repeats were assessed with a fluorescent DNA analysis system. Onset of ESRD was defined by need to start chronic dialysis or kidney transplantation.

resultsThe study involved 916 patients with DN and 1,170 controls. During follow-up for 8.8 years, 107 patients (14%) with 5L-5L died compared with 182 patients (13.8%) with other genotypes (p = 0.99). There was no significant interaction of 5L-5L with DN for prediction of mortality (p = 0.57), but a trend towards interaction with sex (p = 0.08). In patients with DN, HR for ESRD in 5L-5L vs other genotypes was not constant over time, with increased risk for 5L-5L beyond 8 years of follow-up (p = 0.03). CONCLUSIONS/

interpretationCNDP1 polymorphism was not associated with mortality, and nor was there an interaction of this polymorphism with DN for prediction of mortality in patients with type 1 diabetes. CNDP1 polymorphism predicts progression to ESRD in patients with DN, but only late after baseline measurements.

Indexed as

Polymorphism, Single NucleotideAdultCase-Control StudiesDiabetes Mellitus, Type 1Diabetic NephropathiesDipeptidasesDisease ProgressionFemaleFollow-Up StudiesGenetic Predisposition to DiseaseHumansKidney Failure, ChronicMaleMiddle AgedPrognosisSurvival AnalysisCNDP1 protein, humanDipeptidases

Identifiers

PMID20711718
PMCPMC2974933
OpenAlexW2101632595

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Registered trials

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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.