Evidence mapPaperPMID 42298915Full record

ArticleJournal of diabetes investigation2026

Monocyte dipeptidyl peptidase 4 activity is associated with urinary albumin excretion in type 2 diabetes.

Hideyuki Okuma, Takahiro Tsutsumi, Kyoichiro Tsuchiya

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Article in Journal of diabetes investigation, 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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4 · The record

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5 · Who and what money

Authors and funding

3 authors.

Hideyuki OkumaDepartment of Diabetes and Endocrinology, Nerima Hikarigaoka Hospital, Tokyo, Japan.ORCID https://orcid.org/0009-0009-3194-4286
Takahiro TsutsumiDepartment of Diabetes and Endocrinology, Graduate School of Interdisciplinary Research, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan.
Kyoichiro TsuchiyaDepartment of Diabetes and Endocrinology, Graduate School of Interdisciplinary Research, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan.ORCID https://orcid.org/0000-0002-2863-4561

Funding

Japan Society for the Promotion of Science (JSPS) KAKENHI JP25K21120the Japan Diabetes Society
6 · The paper itself

Abstract

introductionPrevious reports have suggested the involvement of pro-inflammatory genes in monocytes and dipeptidyl peptidase 4 (DPP4) in the pathogenesis of diabetic kidney disease (DKD); however, whether DPP4 in monocytes is associated with renal parameters remains unclear. MATERIALS AND

methodsWe conducted a cross-sectional study of 64 patients with type 2 diabetes mellitus (T2DM) not taking incretin-based medications and 50 healthy controls not taking any medication and without cardiovascular risk factors. Peripheral blood monocytes were isolated from the participants, cultured, and stimulated with vehicle or lipopolysaccharide (LPS). After cell harvesting, data regarding DPP4 and pro-inflammatory genes in monocytes were investigated by quantitative real-time polymerase chain reaction and DPP4 activity assay. We evaluated renal parameters based on the urinary albumin-to-creatinine ratio (UACR) and estimated glomerular filtration rate (eGFR).

resultsDPP4 gene expression and DPP4 activity in unstimulated monocytes were elevated in patients with T2DM compared with healthy controls. In the T2DM group, DPP4 gene expression in LPS-stimulated monocytes, but not in unstimulated monocytes, was significantly and positively correlated with UACR and the expression of LPS-stimulated pro-inflammatory genes, but not with eGFR. Furthermore, DPP4 activity in both unstimulated and LPS-stimulated monocytes in the T2DM group was significantly and positively correlated with UACR and the expression of LPS-stimulated pro-inflammatory genes but not with eGFR.

conclusionsThe findings suggested that monocyte DPP4 activity is associated with urinary albumin excretion in patients with T2DM, with or without LPS stimulation. Monocytes may serve as a cellular link between DPP4 and DKD.

Indexed as

AlbuminuriaBiomarkersDiabetes Mellitus, Type 2Diabetic NephropathiesDipeptidyl Peptidase 4MonocytesAgedCase-Control StudiesCross-Sectional StudiesFemaleGlomerular Filtration RateHumansMaleMiddle AgedBiomarkersDipeptidyl Peptidase 4DPP4 protein, humandiabetic kidney diseasedipeptidyl peptidase 4monocyte

Identifiers

PMID42298915
PMCPMC13398444

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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.