Objective: Simplification of diets, low in variety but high in energy, contributes to the loss in diversity observed in the obese gastrointestinal (GI) microbiome. A novel GI microbiome modulator (GIMM) as a dietary intervention was developed.
Methods: Mice were fed either an obesogenic diet (ObD) or an ObD containing 15% activated soy pod fiber (ObD-ASPF) for 30 days. The diets were isocaloric and balanced for macronutrient content. ASPF is a novel fiber preparation from whole soy pods that is activated to produce glyceollins.
Results: Mice fed ObD-ASPF did not gain body fat. This was associated with decreased absorption of calories (P < 0.05) and increased fecal excretion of triglycerides, which may be attributed to decreased bile acid secretion (P < 0.05). A shift (P < 0.05) in abundances of microbiota in 10 genera was observed. Mice fed ObD-ASPF had elevated plasma concentrations of the anti-inflammatory IL-10 (P < 0.05) and decreased (P < 0.05) plasma concentrations of the neutrophil chemoattractant CXCL1.
Conclusions: A novel dietary intervention derived from soy pods that acts to hinder absorption of dietary fat and glucose in mice was developed. More studies with this GIMM in animal models of diet-induced nonalcoholic fatty liver diseases, type 2 diabetes, and autism are needed.
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