Restriction of Dietary Advanced Glycation End Products Induces a Differential Plasma Metabolome and Lipidome Profile
Scope: Diets with low content in advanced glycation end products (AGEs) lead to beneficial properties in highly prevalent age-related diseases. To shed light on the mechanisms behind, the changes induced by a low AGE dietary intervention in the circulating metabolome are analyzed. Methods and Results: To this end, 20 non-diabetic patients undergoing peritoneal dialysis are randomized to continue their usual diet or to one with a low content of AGEs for 1 month. Then, plasmatic metabolome and lipidomes are analyzed by liquid-chromatography coupled to mass spectrometry. The levels of defined AGE structures are also quantified by ELISA and by mass-spectrometry. The results show that the low AGE diet impinged significant changes in circulating metabolomes (166 molecules) and lipidomes (91 lipids). Metabolic targets of low-AGE intake include sphingolipid, ether-lipids, and glycerophospholipid metabolism. Further, it reproduces some of the plasma characteristics of healthy aging. Conclusion : The finding of common pathways induced by low-AGE diets with previous metabolic traits implicated in aging, insulin resistance, and obesity suggest the usefulness of the chosen approach and supports the potential extension of this study to other populations. ; The authors acknowledge funding from the Spanish Ministry of Economy and Competitiveness (PRX15/00613), Institute of Health Carlos III (P.I. 17–00134, PI20-00155) to M.P.-O.; and the Generalitat of Catalonia, Agency for Management of University and Research Grants (2017SGR696) to R.P. R.B. is a fellow from Program "Impuls"-Santander. R.R.-M. is a fellow from CONACYT. This study has been co-financed by FEDER funds from the European Union ("A way to build Europe"). M.J. is a professor under the "Serra Hunter" program (Generalitat de Catalunya).
