食纤维单糖含量改变了肠道微生物组合和发酵过程
Nick Jensen1,2, Maria Maldonado-Gomez1,2, Nithya Krishnakumar1,2
1Department of Food Science and Technology, University of California, Davis, California, USA.
Applied and environmental microbiology
|July 15, 2024
概括
食纤维的单糖化合物成分影响肠道微生物发酵和多样性. 类似的纤维组成导致对微生物物种生存和发酵产品的可预测影响,为分析食纤维提供了一种方法.
科学领域:
- 微生物学 微生物学
- 营养科学 营养科学
- 生物化学 生物化学
背景情况:
- 哺乳动物肠道微生物通过特定的酶和载体代谢食纤维.
- 碳水化合物结构和微生物生态之间的关系尚未完全理解.
- 纤维的单糖组成是微生物生存和发酵的关键因素.
研究的目的:
- 为了研究食纤维单糖化合物的成分对微生物发酵的影响.
- 为了确定纤维单糖含量是否可以预测微生物群多样性和代谢物生产.
- 建立一种基于其成分的可通用方法来比较食纤维.
主要方法:
- 55种不同纤维的发酵,其单糖化合物成分各异.
- 在改造的MiniBioReactor阵列系统中使用了聚合的猫便注射剂.
- 化期为72小时,用于分析发酵产品和微生物组变化.
主要成果:
- 葡萄糖和糖含量与发酵期间的pH值下降有显著的相关性.
- 短链脂肪酸 (SCFA) 和英多尔-3-酸的含量可以从单糖含量中预测.
- 纤维单糖化合物组成和SCFA度预测了微生物群的多样性和组成,包括*Lactobacillus*和*Dubosiella*的丰度.
结论:
- 食纤维的单糖化合物成分是塑造肠道微生物群落及其代谢产量的重要因素.
- 这项研究提供了一种可概括的方法来评估食纤维,并了解它们对肠道微生物群的影响.
- 研究结果强调了饮食,肠道微生物群和代谢物生产之间的联系,受纤维结构成分的影响.
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