RT info:eu-repo/semantics/article T1 Comprehensive metabolomic study of the response of HK-2 cells to hyperglycemic hypoxic diabetic-like milieu A1 Marina Alegre, María Luisa A1 Valdés Tabernero, Alberto A1 Lucio Cazaña, Francisco Javier de A1 Castro Puyana, María A1 García Pastor, Coral A1 Fiehn, Oliver K1 Química K1 Chemistry AB Diabetic nephropathy (DN) is the leading cause of chronic kidney disease. Although hyperglycaemia has been determined as the most important risk factor, hypoxia also plays a relevant role in the development of this disease. In this work, a comprehensive metabolomic study of the response of HK-2 cells, a human cell line derived from normal proximal tubular epithelial cells, to hyperglycemic, hypoxic diabetic-like milieu has been performed. Cells simultaneously exposed to high glucose (25 mM) and hypoxia (1% O-2) were compared to cells in control conditions (5.5 mM glucose/18.6% O-2) at 48 h. The combination of advanced metabolomic platforms (GC-TOF MS, HILIC- and CSH-QExactive MS/MS), freely available metabolite annotation tools, novel databases and libraries, and stringent cut-off filters allowed the annotation of 733 metabolites intracellularly and 290 compounds in the extracellular medium. Advanced bioinformatics and statistical tools demonstrated that several pathways were significantly altered, including carbohydrate and pentose phosphate pathways, as well as arginine and proline metabolism. Other affected metabolites were found in purine and lipid metabolism, the protection against the osmotic stress and the prevention of the activation of the beta -oxidation pathway. Overall, the effects of the combined exposure of HK-cells to high glucose and hypoxia are reasonably compatible with previous in vivo works. SN 2045-2322 YR 2021 FD 2021-03-03 LK http://hdl.handle.net/10017/47767 UL http://hdl.handle.net/10017/47767 LA eng DS MINDS@UW RD 28-mar-2024