益生菌通过减少与细菌相关的模式识别受体介导的炎症在小鼠的肠-大脑轴中的认知障碍来改善认知障碍
Xue-Qin Yang1, Yang Zhao1, Li Xue2
1Department of Pharmacy, Guangyuan Central Hospital, Affiliated Hospital of North Sichuan Medical College, 628000 Guangyuan, Sichuan, China.
Journal of integrative neuroscience
|July 31, 2023
概括
益生菌通过减少肠-大脑轴炎症,改善了小鼠的认知障碍. 这种治疗潜力包括抑制caspase-11/caspase-1通路并降低alpha-kinase 1的表达.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 新兴研究表明,益生菌可以缓解阿尔茨海默病的认知障碍.
- 以前的研究将益生菌与通过Toll-like受体4和视网膜酸诱导基因-I通路改善认知联系起来.
- 益生菌对其他细菌模式识别受体的影响在很大程度上仍未被探索.
研究的目的:
- 研究益生菌对老化加速小鼠认知障碍的影响.
- 阐明了由益生菌介导的认知功能的改善背后的分子机制.
- 探索益生菌与各种细菌相关的模式识别受体的相互作用.
主要方法:
- 衰老加速小鼠易患8 (SAMP8) 的小鼠接受了ProBiotic-4 (四种细菌菌株的混合物) 口服,持续了12周.
- 评估了认知功能,突触完整性,神经元损伤和微质激活.
- 分析了肠道紧结蛋白,炎症性细胞因子 (介质素-1β) 和关键信号分子 (酶-11,酶-1和α-激酶1) 的表达水平.
主要成果:
- 益生菌-4治疗显著改善了SAMP8小鼠的记忆缺陷,并减少了神经元损伤和微质激活.
- 益生菌的使用通过增加密集结蛋白表达来增强肠道屏障功能.
- 关键的炎症标志物,包括互白素-1β,酶-11,切割酶-1和α-激酶1 (ALPK1),在肠道和大脑都显著下调.
结论:
- 益生菌在治疗肠-大脑轴炎症和认知障碍方面具有治疗潜力.
- 观察到的好处与caspase-11/caspase-1信号通路的抑制有关.
- 益生菌诱导的ALPK1表达的减少是促进认知改善的关键机制.
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