| 1. |
- Ross, Alastair, 1976, et al.
(författare)
-
A Whole-Grain-Rich Diet Reduces Urinary Excretion of Markers of Protein Catabolism and Gut Microbiota Metabolism in Healthy Men after One Week
- 2013
-
Ingår i: Journal of Nutrition. - : Elsevier BV. - 1541-6100 .- 0022-3166. ; 143:6, s. 766-773
-
Tidskriftsartikel (refereegranskat)abstract
- Epidemiological studies consistently find that diets rich in whole-grain (WG) cereals lead to decreased risk of disease compared with refined grain (RG)-based diets. Aside from a greater amount of fiber and micronutrients, possible mechanisms for why WGs may be beneficial for health remain speculative. In an exploratory, randomized, researcher-blinded, crossover trial, we measured metabolic profile differences between healthy participants eating a diet based on WGs compared with a diet based on RGs. Seventeen healthy adult participants (11 female, 6 male) consumed a controlled diet based on either WG-rich or RG-rich foods for 2 wk, followed by the other diet after a 5-wk washout period. Both diets were the same except for the use of WG (150 g/d) or FIG foods. The metabolic profiles of plasma, urine, and fecal water were measured using H-1-nuclear magnetic resonance spectroscopy and gas chromatography-mass spectrometry (plasma only). After 1 wk of intervention, the WG diet led to decreases in urinary excretion of metabolites related to protein catabolism (urea, methylguanadine), lipid (carnitine and acylcarnitines) and gut microbial (4-hydroxyphenylacetate, trimethylacetate, dimethylacetate) metabolism in men compared with the same time point during the FIG intervention. There were no differences between the interventions after 2 wk. Urinary urea, carnitine, and acylcarnitine were lower at wk 1 of the WG intervention relative to the FIG intervention in all participants. Fecal water short-chain fatty acids acetate and butyrate were relatively greater after the WG diet compared to the RG diet. Although based on a small population and for a short time period, these observations suggest that a WG diet may affect protein metabolism.
|
|
| 2. |
- Moco, S., et al.
(författare)
-
Can We Use Metabolomics to Understand Changes to Gut Microbiota Populations and Function? A Nutritional Perspective
- 2015
-
Ingår i: Molecular and Integrative Toxicology. - London : Springer London. ; , s. 83-108
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Food is an integral part of human life, and the composition of our diet is an important determinant of our health and well-being. Food is also the main source of energy and nutrients for the gut microbiota, the 100 trillion cells that coexist inside us. The impact of macronutrients (protein, fat, carbohydrates, and fiber) and specific non-nutrient food components (polyphenols) will be reviewed in the context of gut microbial function and interaction with the host. Colonic microbiota provides diverse enzymatic activities differing from our own, which lead to the production of metabolites essential for key metabolic functions, including carbohydrate and amino acid metabolism. Certain gut metabolites are specific to microbial activity and confer functionalities beyond energy production, such as signalling cascades across cells, tissues, and organs. Metabolomics has proven to be a useful tool to measure the effects of food on the gut microbiota and its interaction with host metabolism.
|
|
