Abstract

BSH, BSH-1 and BSH-2 are three naturally acetylated xylans obtained from bamboo shavings. The study investigated their in vitro digestibility and fermentability by intestinal bacteria. Results show...

Highlights

  • Xylans represent the second most abundant plant cell wall polysaccharide next to cellulose in plant (Mirande et al, 2010)

  • The results indicated that BSH, BSH-1 and BSH-2 had low digestibility in simulated gastric and intestinal fluid and could be fermented by Bacteroides spp. and Bifidobacterium spp. in different degrees, with a growth ratio to glucose ranged from 12.1–36.3%, and their fermentability was all slightly enhanced after simulated gastrointestinal digestion

  • The Mw of the three polysaccharides was almost unchanged when the digestive enzymes and bile in the gastric and intestinal medium were not added. Considering these substances in the stomach and small intestine would not flow into the large intestine under physiological conditions, BSH, BSH-1 and BSH-2 were digested without using them and lyophilized to afford BSH-D, BSH-1-D and BSH-2-D, respectively

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Summary

Introduction

Xylans represent the second most abundant plant cell wall polysaccharide next to cellulose in plant (Mirande et al, 2010). Xylans have many useful biological effects including acting as an antioxidant, lowering cholesterol level (hypocholesterolemia) and stimulating the immune system They can be fermented by specific colonic bacteria to produce short-chain fatty acids that are beneficial to the body’s health. BSH, BSH-1 and BSH-2 are three naturally acetylated xylans obtained from steamexploded bamboo shavings The study investigated their in vitro digestibility and fermentability by intestinal bacteria. BSH, BSH-1 and BSH-2 have shown immunostimulatory activity according to our previous studies (Huang et al, 2017a, 2017b) Their in vitro fermentability by intestinal bacteria has not been investigated yet. The fermentability of BSH, BSH-1, BSH-2 and their corresponding digesta by several intestinal bacteria was evaluated

Results and discussion
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