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Candidate protein biomarkers in chronic kidney disease: a proteomics study

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SCHOOL OF MEDICINE
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Makhammajanov, Zhalaliddin
Kabayeva, Assem
Auganova, Dana
Tarlykov, Pavel
Bukasov, Rostislav
Turebekov, Duman
Molnar, Miklos Z.
Kovesdy, Csaba P.
Abidi, Syed Hani
Gaipov, Abduzhappar

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Abstract

Proteinuria poses a substantial risk for the progression of chronic kidney disease (CKD) and its related complications. Kidneys excrete hundreds of individual proteins, some with a potential impact on CKD progression or as a marker of the disease. However, the available data on specific urinary proteins and their relationship with CKD severity remain limited. Therefore, we aimed to investigate the urinary proteome and its association with kidney function in CKD patients and healthy controls. The proteomic analysis of urine samples showed CKD stage-specific differences in the number of detected proteins and the exponentially modified protein abundance index for total protein (p = 0.007). Notably, specific urinary proteins such as B2MG, FETUA, VTDB, and AMBP exhibited robust negative associations with kidney function in CKD patients compared to controls. Also, A1AG2, CD44, CD59, CERU, KNG1, LV39, OSTP, RNAS1, SH3L3, and UROM proteins showed positive associations with kidney function in the entire cohort, while LV39, A1BG, and CERU consistently displayed positive associations in patients compared to controls. This study suggests that specific urinary proteins, which were found to be negatively or positively associated with the kidney function of CKD patients, can serve as markers of dysfunctional or functional kidneys, respectively. © The Author(s) 2024.

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Nature Research

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Nephropathy, Beta-2-microglobulin, Peptides, Injury, Risk

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Scientific Reports

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10.1038/s41598-024-64833-8

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