Evidence mapPaperPMID 42104992Full record

ArticlePediatric nephrology (Berlin, Germany)2026

Urinary podocalyxin identifies a pre-albuminuric kidney injury window and stratifies 12-year diabetic kidney disease risk in youth with type 1 diabetes mellitus.

Seniha Kiremitci Yilmaz, Betul Ersoy, Nilay Tuğçe Işık Bayar, Arzu Oran, Fatma Taneli

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Article in Pediatric nephrology (Berlin, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Seniha Kiremitci YilmazDivision of Paediatric Endocrinology, Faculty of Medicine, Celal Bayar University, Manisa, Turkey. skyilmaz.dr@gmail.com.ORCID http://orcid.org/0000-0002-9146-4809
Betul ErsoyDivision of Paediatric Endocrinology and Metabolism, Faculty of Medicine, Celal Bayar University, Manisa, Turkey.ORCID http://orcid.org/0000-0003-1696-8406
Nilay Tuğçe Işık BayarDivision of Paediatric Endocrinology and Metabolism, Faculty of Medicine, Celal Bayar University, Manisa, Turkey.ORCID http://orcid.org/0000-0002-0239-394X
Arzu OranDepartment of Clinical Biochemistry, Faculty of Medicine, Celal Bayar University, Manisa, Turkey.ORCID http://orcid.org/0000-0002-3018-5654
Fatma TaneliDepartment of Clinical Biochemistry, Faculty of Medicine, Celal Bayar University, Manisa, Turkey.ORCID http://orcid.org/0000-0002-5194-0460

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6 · The paper itself

Abstract

backgroundMicroalbuminuria indices may miss early diabetic kidney disease (DKD) and can regress. Urinary podocyte and tubular injury biomarkers may detect subclinical kidney injury before albuminuria. We evaluated urinary podocyte- and tubule-derived biomarkers in adolescents/young adults with type 1 diabetes mellitus (T1DM) and compared 12-year prognostic performance with albuminuria.

methodsA total of 130 participants with T1DM were screened; 109 were eligible and included in the baseline analysis, and 30 age-matched healthy controls were enrolled. Baseline urinary podocalyxin (u-PCX), nephrin (u-nephrin), and liver-type fatty acid-binding protein (u-LFABP) were measured by ELISA and indexed to creatinine; albuminuria was assessed by 24-h albumin excretion rate (u-AER) and spot albumin-to-creatinine ratio (u-ACR). Fifty-one participants were reassessed after 12 years; measurements were obtained at baseline and at the 12-year follow-up visit. Incident DKD (micro-/macroalbuminuria) was the primary outcome. Discrimination was assessed by ROC curves and Youden thresholds.

resultsAt baseline, 90% had normoalbuminuria. Participants with normoalbuminuria had higher u-PCX/Cr, u-nephrin/Cr, and u-LFABP/Cr vs. controls (all p ≤ 0.001). Over 12 years, 7/51 developed DKD. Baseline u-PCX/Cr discriminated incident DKD (AUC 0.96; 95% CI 0.91-1.00): <78 ng/mgCr (NPV 100%) and ≥193 ng/mgCr had specificity 95.5%; DKD incidence across <78, 78-193 and ≥193 ng/mgCr strata was 0%, 20% and 75%, respectively (p-trend < 0.001). Baseline spot u-ACR also performed well (AUC 0.87; 95% CI 0.74-1.00).

conclusionsBaseline u-PCX/Cr and u-LFABP/Cr were elevated in those who developed micro-/macroalbuminuria at 12 years. Spot u-ACR remains a practical prognostic tool, while u-PCX/Cr provides complementary, actionable long-term risk cut-points requiring external validation.

Indexed as

Diabetic kidney diseaseLiver-type fatty acid-binding proteinNephrinPodocalyxinType 1 diabetes mellitusUrinary biomarkers

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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 Socratic graph.