RT Journal Article T1 Glycolysis/gluconeogenesis- and tricarboxylic acid cycle-related metabolites, Mediterranean diet, and type 2 diabetes. A1 Guasch-Ferré, Marta A1 Santos, José L A1 Martínez-González, Miguel A A1 Clish, Clary B A1 Razquin, Cristina A1 Wang, Dong A1 Liang, Liming A1 Li, Jun A1 Dennis, Courtney A1 Corella, Dolores A1 Muñoz-Bravo, Carlos A1 Romaguera, Dora A1 Estruch, Ramón A1 Santos-Lozano, José Manuel A1 Castañer, Olga A1 Alonso-Gómez, Angel A1 Serra-Majem, Luis A1 Ros, Emilio A1 Canudas, Sílvia A1 Asensio, Eva M A1 Fitó, Montserrat A1 Pierce, Kerry A1 Martínez, J Alfredo A1 Salas-Salvadó, Jordi A1 Toledo, Estefanía A1 Hu, Frank B A1 Ruiz-Canela, Miguel K1 glycolysis metabolites K1 insulin resistance K1 metabolomics K1 tricarboxylic acid cycle metabolites K1 type 2 diabetes AB Glycolysis/gluconeogenesis and tricarboxylic acid (TCA) cycle metabolites have been associated with type 2 diabetes (T2D). However, the associations of these metabolites with T2D incidence and the potential effect of dietary interventions remain unclear. We aimed to evaluate the association of baseline and 1-y changes in glycolysis/gluconeogenesis and TCA cycle metabolites with insulin resistance and T2D incidence, and the potential modifying effect of Mediterranean diet (MedDiet) interventions. We included 251 incident T2D cases and 638 noncases in a nested case-cohort study within the PREDIMED Study during median follow-up of 3.8 y. Participants were allocated to MedDiet + extra-virgin olive oil, MedDiet + nuts, or control diet. Plasma metabolites were measured using a targeted approach by LC-tandem MS. We tested the associations of baseline and 1-y changes in glycolysis/gluconeogenesis and TCA cycle metabolites with subsequent T2D risk using weighted Cox regression models and adjusting for potential confounders. We designed a weighted score combining all these metabolites and applying the leave-one-out cross-validation approach. Baseline circulating concentrations of hexose monophosphate, pyruvate, lactate, alanine, glycerol-3 phosphate, and isocitrate were significantly associated with higher T2D risk (17-44% higher risk for each 1-SD increment). The weighted score including all metabolites was associated with a 30% (95% CI: 1.12, 1.51) higher relative risk of T2D for each 1-SD increment. Baseline lactate and alanine were associated with baseline and 1-y changes of homeostasis model assessment of insulin resistance. One-year increases in most metabolites and in the weighted score were associated with higher relative risk of T2D after 1 y of follow-up. Lower risks were observed in the MedDiet groups than in the control group although no significant interactions were found after adjusting for multiple comparisons. We identified a panel of glycolysis/gluconeogenesis-related metabolites that was significantly associated with T2D risk in a Mediterranean population at high cardiovascular disease risk. A MedDiet could counteract the detrimental effects of these metabolites.This trial was registered at controlled-trials.com as ISRCTN35739639. YR 2020 FD 2020 LK https://hdl.handle.net/10668/24802 UL https://hdl.handle.net/10668/24802 LA en DS RISalud RD Apr 6, 2025