Next Article in Journal / Special Issue
Association of Polyphenols from Oranges and Apples with Specific Intestinal Microorganisms in Systemic Lupus Erythematosus Patients
Previous Article in Journal
Glycaemic Index and Load Values Tested in Normoglycemic Adults for Five Staple Foodstuffs: Pounded Yam, Pounded Cassava-Plantain, Placali, Attieke and Maize Meal Stiff Porridge
Previous Article in Special Issue
Intestinal Microbial Dysbiosis and Colonic Epithelial Cell Hyperproliferation by Dietary α-Mangostin is Independent of Mouse Strain
Open AccessArticle

Pilot Dietary Intervention with Heat-Stabilized Rice Bran Modulates Stool Microbiota and Metabolites in Healthy Adults

1
Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523, USA
2
Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO 80523, USA
3
Department of Clinical Sciences, Animal Population Health Institute, Colorado State University, Fort Collins, CO 80523, USA
4
Cancer Center of the Rockies, University of Colorado Health, Fort Collins, CO 80522, USA
5
Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA
6
Proteomics and Metabolomics Facility, Colorado State University, Fort Collins, CO 80523, USA
*
Authors to whom correspondence should be addressed.
Nutrients 2015, 7(2), 1282-1300; https://doi.org/10.3390/nu7021282
Received: 11 November 2014 / Accepted: 15 January 2015 / Published: 16 February 2015
(This article belongs to the Special Issue Microbiome and Human Health)
Heat-stabilized rice bran (SRB) has been shown to regulate blood lipids and glucose, modulate gut mucosal immunity and inhibit colorectal cancer in animal and human studies. However, SRB’s effects on gut microbial composition and metabolism and the resulting implications for health remain largely unknown. A pilot, randomized-controlled trial was developed to investigate the effects of eating 30 g/day SRB on the stool microbiome and metabolome. Seven healthy participants consumed a study meal and snack daily for 28 days. The microbiome and metabolome were characterized using 454 pyrosequencing and gas chromatography-mass spectrometry (GC-MS) at baseline, two and four weeks post-intervention. Increases in eight operational taxonomic units (OTUs), including three from Bifidobacterium and Ruminococcus genera, were observed after two and four weeks of SRB consumption (p < 0.01). Branched chain fatty acids, secondary bile acids and eleven other putative microbial metabolites were significantly elevated in the SRB group after four weeks. The largest metabolite change was a rice bran component, indole-2-carboxylic acid, which showed a mean 12% increase with SRB consumption. These data support the feasibility of dietary SRB intervention in adults and support that SRB consumption can affect gut microbial metabolism. These findings warrant future investigations of larger cohorts evaluating SRB’s effects on intestinal health. View Full-Text
Keywords: stool; microbiome; metabolome; microbial metabolites; dietary intervention; heat-stabilized rice bran stool; microbiome; metabolome; microbial metabolites; dietary intervention; heat-stabilized rice bran
Show Figures

Figure 1

MDPI and ACS Style

Sheflin, A.M.; Borresen, E.C.; Wdowik, M.J.; Rao, S.; Brown, R.J.; Heuberger, A.L.; Broeckling, C.D.; Weir, T.L.; Ryan, E.P. Pilot Dietary Intervention with Heat-Stabilized Rice Bran Modulates Stool Microbiota and Metabolites in Healthy Adults. Nutrients 2015, 7, 1282-1300.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop