Journal
CARBOHYDRATE POLYMERS
Volume 131, Issue -, Pages 50-56Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.05.022
Keywords
Digestibility; Sugar-beet arabinan; Linear arabino-oligosaccharides (LAOS); Prebiotics; In vitro fermentation
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Funding
- Korean Rural Development Administration (RDA) [PJ90715303]
- Intelligent Synthetic Biology Center of Global Frontier Project funded by the Korean Ministry of Science, ICT & Future Planning [2013M3A6A8073553]
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This study was conducted to investigate the prebiotic effects of linear arabino-oligosaccharides (LAOS) and debranched (linear) sugar beet arabinan (LAR) for the development of new prebiotics. LAOS were prepared from LAR by enzymatic hydrolysis with endo-arabinanase from Bacillus licheniformis, followed by removal of the arabino se fraction by incubation with resting cells of Leuconostoc mesenteroides. The resulting LAOS contained DP2 (28.7%), DP3 (49.9%), DP4 (20.1%), and DP5 (1.16%). A standardized digestibility test showed that LAOS and LAR were not digestible. Individual cultures of 24 strains of gastrointestinal bacteria showed that LAOS and LAR stimulated growth of Lactobacillus brevis, Bifidobacterium longum, and Bacteroides fragilis. In vitro batch fermentation using human fecal samples showed that LAOS had higher bifidogenic properties than LAR; LAOS increased the population of bifidobacteria which produced short-chain fatty acids (SCFAs). LAOS was fermented slowly compared to fructo-oligosaccharides and this may permit SCFA production in the distal colon. This study demonstrates that LAOS prepared from LAR are promising dietary substrates for improvement of human intestinal health. (C) 2015 Elsevier Ltd. All rights reserved.
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