高粘度减缓了人类肠道微生物群利用快速发酵的食纤维的速度
Xiangxiang He1,2, Cuixia Sun1, Jingwen Zhao1
1Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
Journal of agricultural and food chemistry
|December 6, 2023
概括
增加的粘度显著减缓了肠道微生物群的果类糖 (FOS) 发酵,减少了气体和短链脂肪酸 (SCFA) 的产生. 添加甲基纤维素提供了一种调节FOS发酵的方法,以获得潜在的益处.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 生物化学 生化学
背景情况:
- 果醇糖 (FOS) 是一种益生菌,通过选择性地养有益的肠道细菌来促进肠道健康.
- 益生菌的发酵速度可以影响其有效性和宿主的生理反应.
- 了解影响FOS发酵的因素对于优化益生菌应用至关重要.
研究的目的:
- 研究由甲基纤维素 (MC) 调节的粘度对肠道微生物群对FOS发酵特性的影响.
- 确定不同的粘度水平如何影响发酵副产品的产生,如气体和短链脂肪酸 (SCFA).
- 评估粘度在FOS发酵过程中对肠道微生物群社区结构的影响.
主要方法:
- 果醇糖 (FOS) 在不同度的甲基纤维素 (MC) 的存在下与肠道微生物群发酵,以产生不同的粘度水平.
- 气体和短链脂肪酸 (SCFA) 产量被监测为发酵速度的指标.
- 分析了肠道微生物群社区结构,以评估粘度的影响.
主要成果:
- 由甲基纤维素 (MC) 度增加引起的较高粘度,显著减缓了果糖酸盐 (FOS) 的发酵速度.
- 最高的粘度 (2.5 wt% MC) 导致气体和短链脂肪酸 (SCFA) 的生产最低和最慢.
- 由于粘度而改变的发酵速率与单独的FOS发酵相比,没有显著改变整体肠道微生物群体结构.
结论:
- 增加的粘度起到屏障作用,阻碍肠道微生物群分解果类糖 (FOS).
- 甲基纤维素 (MC) 可以与FOS结合,以调节发酵速率,可能实现释放速度较慢的益生菌效应.
- 这种方法可以通过控制益生菌的发酵动力学来提高肠道健康益处.
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