Claudia Vetrani1, Giuseppina Costabile2, Delia Luongo3, Daniele Naviglio4, Angela A Rivellese5, Gabriele Riccardi5, Rosalba Giacco6. 1. Department of Clinical Medicine and Surgery, "Federico II" University, Naples, Italy. Electronic address: c.vetrani@libero.it. 2. Department of Clinical Medicine and Surgery, "Federico II" University, Naples, Italy; CNR-Institute of Food Science, Avellino, Italy. 3. CNR-Institute of Biostructures and Bioimaging, Naples, Italy. 4. Department of Chemical Sciences, "Federico II" University, Naples, Italy. 5. Department of Clinical Medicine and Surgery, "Federico II" University, Naples, Italy. 6. CNR-Institute of Food Science, Avellino, Italy.
Abstract
OBJECTIVE:Short chain fatty acids (SCFAs) derived from dietary fiber fermentation by gut microbiota have been identified as one of the mechanisms behind the association between habitual whole-grain intake and a lower risk of cardiometabolic diseases. The aims of the present work are: (1) to evaluate whether a whole-grain wheat-based diet may increase SCFAs concentration, and (2) to identify possible associations between SCFAs and metabolic changes observed after the nutritional intervention. METHODS:Fifty-four subjects participated in the trial. They underwent a 12-wk dietary intervention based on whole-grain or refined cereal products. At baseline and after the intervention, glucose, insulin, triacylglycerol, inflammatory markers (hs-CRP, IL-1 ra, IL-6, and TNF-α), and SCFAs plasma concentrations were evaluated. RESULTS: After the intervention, in the whole-grain group fasting plasma propionate concentrations were higher than at baseline, whereas a reduction was detected in the control group. The absolute changes (end of trial minus baseline) in fasting plasma propionate concentrations were significantly different between the two groups (P = 0.048). The absolute changes of fasting propionate correlated with cereal fiber intake (r = 0.358, P = 0.023), but no significant correlations with clinical outcomes were found. However, postprandial insulin was significantly decreased in the group having the absolute changes of fasting propionate concentration above the median value (P = 0.022 versus subjects with fasting propionate changes below the median value). CONCLUSIONS: A 12-wk whole-grain wheat-based diet increases fasting plasma propionate. This increase correlates with the cereal fiber intake and is associated with lower postprandial insulin concentrations.
RCT Entities:
OBJECTIVE:Short chain fatty acids (SCFAs) derived from dietary fiber fermentation by gut microbiota have been identified as one of the mechanisms behind the association between habitual whole-grain intake and a lower risk of cardiometabolic diseases. The aims of the present work are: (1) to evaluate whether a whole-grain wheat-based diet may increase SCFAs concentration, and (2) to identify possible associations between SCFAs and metabolic changes observed after the nutritional intervention. METHODS: Fifty-four subjects participated in the trial. They underwent a 12-wk dietary intervention based on whole-grain or refined cereal products. At baseline and after the intervention, glucose, insulin, triacylglycerol, inflammatory markers (hs-CRP, IL-1 ra, IL-6, and TNF-α), and SCFAs plasma concentrations were evaluated. RESULTS: After the intervention, in the whole-grain group fasting plasma propionate concentrations were higher than at baseline, whereas a reduction was detected in the control group. The absolute changes (end of trial minus baseline) in fasting plasma propionate concentrations were significantly different between the two groups (P = 0.048). The absolute changes of fasting propionate correlated with cereal fiber intake (r = 0.358, P = 0.023), but no significant correlations with clinical outcomes were found. However, postprandial insulin was significantly decreased in the group having the absolute changes of fasting propionate concentration above the median value (P = 0.022 versus subjects with fasting propionate changes below the median value). CONCLUSIONS: A 12-wk whole-grain wheat-based diet increases fasting plasma propionate. This increase correlates with the cereal fiber intake and is associated with lower postprandial insulin concentrations.
Authors: Sarah Am Kelly; Louise Hartley; Emma Loveman; Jill L Colquitt; Helen M Jones; Lena Al-Khudairy; Christine Clar; Roberta Germanò; Hannah R Lunn; Gary Frost; Karen Rees Journal: Cochrane Database Syst Rev Date: 2017-08-24
Authors: Francesca Fava; Maria M Ulaszewska; Matthias Scholz; Jan Stanstrup; Lorenzo Nissen; Fulvio Mattivi; Joan Vermeiren; Douwina Bosscher; Carlo Pedrolli; Kieran M Tuohy Journal: Eur J Nutr Date: 2022-03-05 Impact factor: 4.865