Alkali treatment of maize bran affects utilization of arabinoxylan and other non-digestible carbohydrates by the human gut microbiota in vitro in a dose-dependent manner

Alkali treatment of maize bran can break ferulate cross-linking and increase utilization of alkali-solubilized arabinoxylan (AX) by the human gut microbiome. However, it is not known how alkali treatment affects the utilization of AX and other non-digestible carbohydrates (NDC) that remain insoluble...

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Bibliographic Details
Published in:Food hydrocolloids 2024-06, Vol.151, p.109764, Article 109764
Main Authors: Liu, Sujun, Ding, Wensheng, Yang, Qinnan, Rose, Devin J.
Format: Article
Language:English
Subjects:
Arabinoxylan
Butyrate
Carbohydrate fermentation
Dietary fiber
Phenolic compounds
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Summary:Alkali treatment of maize bran can break ferulate cross-linking and increase utilization of alkali-solubilized arabinoxylan (AX) by the human gut microbiome. However, it is not known how alkali treatment affects the utilization of AX and other non-digestible carbohydrates (NDC) that remain insoluble after alkali treatment, or how varying degrees of alkali treatment affect NDC fermentation. Therefore, maize bran was treated with alkali ranging from 0 to 1.25 M NaOH, neutralized, and then subjected to in vitro digestion and fermentation using human fecal microbiomes. Increasing alkali concentration progressively increased water solubility of NDC, especially AX, and increased microbial fermentation of water-soluble AX (p 
ISSN:0268-005X
1873-7137
DOI:10.1016/j.foodhyd.2024.109764