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莱西马基亚克里斯蒂娜多糖类通过调节肠道微生物介导的FXR-FGF15信号通路来减轻饮食引起的高脂血症
Yong-Fei Zhou1, Jiaojiao Nie1, Chao Shi1
1National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin 130012, PR China.
International journal of biological macromolecules
|July 7, 2023
概括
莱西马希亚克里斯蒂纳多糖通过改变肠道细菌和胆酸代谢来降低高胆固醇. 这种天然化合物增强胆汁酸的合成,为管理高脂血症提供了一种新的方法.
科学领域:
- 微生物学 微生物学
- 代谢科学 代谢科学
- 药理学 药理学是指药理学的学科.
背景情况:
- 莱西马希亚克里斯蒂纳多糖是用于胆固醇调节的关键生物活性化合物.
- 这些多糖化合物影响胆固醇代谢的确切机制尚未完全理解.
- 肠道微生物群和胆酸概况越来越被认为是代谢健康的关键因素.
研究的目的:
- 阐明来自L. christinae的天然多糖体 (NP) 在减弱异常胆固醇代谢中的作用机制.
- 调查肠道微生物群和胆酸变化的作用在NP的低脂性影响中.
- 探索纤维细胞生长因子15 (FGF15) 途径在NP介导的脂质减少中的参与.
主要方法:
- 向高脂肪饮食诱导的超脂血性小鼠注射纯化的L. christinae天然多糖 (NP).
- 对肠道微生物群组成,胆酸池和关键代谢酶 (胆固醇7α-氧酶,胆盐氧酶) 的分析.
- 便微生物种移植 (FMT),细菌中的胆盐化酶 (BSH) 的基因工程,以及由腺相关病毒介导的FGF15信号的操纵.
主要成果:
- 在高脂血症小鼠中,NP的使用显著降低了血清胆固醇和甘油三水平.
- NP改变了肠道微生物群的组成,增加了Lactobacillus murinus,并修改了胆酸概况,特别是增加了非结合胆酸.
- 证明低脂效应依赖于微生物群,并与通过胆固醇7α-氧化酶和调节胆盐氧化酶活性增强胆酸合成有关.
- FGF15信号与NP诱导的降脂效应有关.
结论:
- 来自L. christinae的天然多糖有效地减轻超脂血症,通过调节肠道微生物群和胆酸代谢.
- 胆固醇转化为胆汁酸是NP影响的关键途径,通过肠道细菌和潜在的FGF15信号传递进行介导.
- 用L. christinae多糖化物准肠道微生物群和胆酸通路,代表了管理高脂血症的有希望的治疗策略.
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