Urinary exosome proteins PAK6 and EGFR as noninvasive diagnostic biomarkers of diabetic nephropathy

BMC Nephrology

Research

Man Zhang¹  Tian ci Liu¹  Tao Li¹  Na Liu¹  Meng jie Li¹ 

[1] Clinical Laboratory Medicine, Beijing Shijitan Hospital, Capital Medical University, 100038, Beijing, China;Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, 100038, Beijing, China;

关键词: Diabetic nephropathy;    Urinary exosomes;    PAK6;    EGFR;    Biomarkers;   

DOI  :  10.1186/s12882-023-03343-7

 received in 2023-04-16, accepted in 2023-09-21,  发布年份 2023

来源: Springer

【 摘 要 】

ObjectiveThe actin cytoskeleton plays an essential role in maintaining podocyte functions. However, whether the urinary exosome proteins related to the regulation of the actin cytoskeleton are changed in diabetic nephropathy (DN) is still unknown. This study was to investigate the possibility that related proteins can be applied as diagnostic biomarkers for DN.MethodsUrinary exosomes were obtained from 144 participants (Discovery phase: n = 72; Validation phase: n = 72) by size exclusion chromatography methods. Proteomic analysis of urinary exosome by LC-MS/MS. Western blot and ELISA were applied to validate the selected urinary exosome proteins. The clinical value of selected urinary exosome proteins was evaluated using correlation and receiver operating characteristic curve analyses.ResultsFifteen urinary proteins related to the regulation of the actin cytoskeleton were identified in urinary exosomes. Three upregulated proteins were selected, including Serine/threonine-protein kinase PAK6 (PAK6), Epidermal growth factor receptor (EGFR), and SHC-transforming protein 1(SHC1). The expression level of PAK6 and EGFR was negatively correlated with estimated glomerular filtration rate and positively correlated with serum creatinine levels. For diagnosing DN in the discovery phase: the area under curve (AUC) of PAK6 was 0.903, EGFR was 0.842, and the combination of two proteins was 0.912. These better performances were also observed in the validation phase (For PAK6: AUC = 0.829; For EGFR: AUC = 0.797; For PAK6 + EGFR: AUC = 0.897).ConclusionsUrinary exosome proteins PAK6 and EGFR may be promising and noninvasive biomarkers for diagnosing DN.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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