益生菌Lactobacillus plantarum通过调节肠道微生物群来激活PPARγ并抑制MAPKs/NF-κBs来缓解结肠炎
Rongxin Zang1,2, Rui Zhou1, Yaodong Li1
1College of Life Science and Engineering, Northwest Minzu University, Lanzhou, 730100, China.
European journal of nutrition
|November 28, 2024
概括
植物乳杆菌LR002 (LR) 通过恢复肠道微生物群平衡和减少炎症,有效地减少了小鼠的性结肠炎 (UC) 症状. 这种益生菌显示出作为促进肠道健康的天然抗炎剂的前景.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
背景情况:
- 性结肠炎 (UC) 是一种具有重大公共卫生影响的慢性炎症性肠病.
- 目前对UC的治疗方法可能存在局限性,需要探索新的治疗策略.
- 益生菌,如某些Lactobacillus菌株,正在研究它们在管理炎症状况方面的潜力.
研究的目的:
- 在小鼠模型中研究Lactobacillus plantarum LR002 (LR) 对硫酸 (DSS) 诱导的性结肠炎 (UC) 的治疗作用.
- 阐明LR可能对大肠炎产生有益影响的潜在机制.
- 评估LR对肠道屏障完整性,炎症和肠道微生物群组成的影响.
主要方法:
- 在小鼠中使用DSS诱导UC,并随后给予LR.
- 评估疾病活动指数 (DAI) 和结肠组织的组织病理变化.
- 对肠上皮质屏障蛋白质,炎症性细胞因子水平,氧化应激标志物和肠道微生物群组成的分析.
主要成果:
- 在DSS诱导的UC小鼠中,LR治疗显著降低了DAI,结肠缩短和组织损伤.
- LR保留了肠道紧结蛋白和减少了促炎性细胞因子 (IL-1β,IL-6,TNF-α) 和氧化应激标志物.
- LR调节肠道微生物群,增加有益的细菌 (Prevotellaceae, Ligilactobacillus) 和减少有害的细菌 (Bacteroidaceae, Eubacteriumrum),同时增加短链脂肪酸 (SCFA) 和PPARγ,并抑制MAPK/NF-κB通路.
结论:
- 植物性乳杆菌LR002在UC的小鼠模型中显示出显著的抗炎和肠道保护作用.
- 通过调节肠道微生物群,加强肠道屏障和调节炎症信号通路,LR可以改善结肠炎.
- 这些发现支持LR作为天然抗炎食品成分的潜力,用于改善肠道健康和管理炎症性肠道疾病.
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