PMID- 33123032 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240329 IS - 1664-042X (Print) IS - 1664-042X (Electronic) IS - 1664-042X (Linking) VI - 11 DP - 2020 TI - Urine Metabolomics Analysis in Patients With Normoalbuminuric Diabetic Kidney Disease. PG - 578799 LID - 10.3389/fphys.2020.578799 [doi] LID - 578799 AB - OBJECTIVE: Diabetic kidney disease (DKD) leads to low high albuminuria and gradually progresses to very high albuminuria with kidney insufficiency. However, about 20-40% of DKD is normoalbuminuric DKD (NADKD), which has impaired kidney function but normal urine albumin. This study is to investigate the urine metabolomic profiles of patients with NADKD and albuminuria DKD (ADKD). METHODS: In total, 95 patients were divided into a simple diabetes mellitus group (SDM group), an ADKD group, and a NADKD group. All subjects were analyzed for urine metabolites using non-targeted metabolomics based on ultra-performance liquid chromatography - tandem mass spectrometry. RESULTS: The urine metabolomic profiles of the SDM group, NADKD group, and ADKD group were significantly different, and 65 different metabolites were identified among the three groups. Metabolic pathway analysis of these differential metabolites found that the top three significantly changed metabolic pathways were linoleic acid metabolism, citrate cycle, and, arginine and proline metabolism. There are 12 metabolites enriched in these three metabolic pathways. In detail, compared with those in the SDM group, the levels of gamma-linolenic acid in the ADKD group were increased significantly, while the levels of succinic acid, cis-aconitic acid, citric acid, L-proline, L-erythro-4-hydroxyglutamate, N-methylhydantoin, N-carbamoylputrescine, spermidine, and 5-aminopentanoic acid were reduced significantly; compared with those in the NADKD group, the levels of linoleic acid, gamma-linolenic acid, and L-malic acid in the ADKD group were increased significantly (P < 0.05), while the levels of L-proline, L-erythro-4-hydroxyglutamate, N-carbamoylputrescine, and spermidine were significantly reduced (P < 0.05). However, there were no significant difference between the SDM group and NADKD group (P > 0.05). CONCLUSION: The urine metabolomic profiles between the NADKD group and the ADKD group are significantly different. Specifically, these two groups have distinct levels of linoleic acid, gamma-linolenic acid, L-malic acid, L-proline, L-erythro-4-hydroxyglutamate, N-carbamoylputrescine, and spermidine. CI - Copyright (c) 2020 Feng, Li, Yang and Feng. FAU - Feng, Qian AU - Feng Q AD - College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China. FAU - Li, Yuanmeng AU - Li Y AD - Department of Medical Laboratory, Affiliated Hospital of Southwest Medical University, Luzhou, China. FAU - Yang, Yuwei AU - Yang Y AD - Department of Clinical Laboratory, Mianyang Central Hospital, Mianyang, China. FAU - Feng, Jiafu AU - Feng J AD - Department of Clinical Laboratory, Mianyang Central Hospital, Mianyang, China. LA - eng PT - Journal Article DEP - 20201006 PL - Switzerland TA - Front Physiol JT - Frontiers in physiology JID - 101549006 PMC - PMC7573362 OTO - NOTNLM OT - albuminuria OT - diabetes mellitus OT - diabetic kidney disease OT - glomerular filtration rate OT - metabolomics EDAT- 2020/10/31 06:00 MHDA- 2020/10/31 06:01 PMCR- 2020/10/06 CRDT- 2020/10/30 05:53 PHST- 2020/07/01 00:00 [received] PHST- 2020/08/31 00:00 [accepted] PHST- 2020/10/30 05:53 [entrez] PHST- 2020/10/31 06:00 [pubmed] PHST- 2020/10/31 06:01 [medline] PHST- 2020/10/06 00:00 [pmc-release] AID - 10.3389/fphys.2020.578799 [doi] PST - epublish SO - Front Physiol. 2020 Oct 6;11:578799. doi: 10.3389/fphys.2020.578799. eCollection 2020.