三甲基胺N-氧化物作为一个调解者,将外周与中心炎症联系起来:一个体外研究
Manuel H Janeiro1, Maite Solas1,2, Josune Orbe2,3,4
1Department of Pharmacology and Toxicology, University of Navarra, 31008 Pamplona, Spain.
International journal of molecular sciences
|December 23, 2023
概括
三甲基胺N氧化物 (TMAO) 是肠道微生物的代谢物,它将外周炎症与大脑炎症联系起来. 减少TMAO可能为神经退行性疾病提供新的治疗方法.
科学领域:
- 微生物学 微生物学
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
背景情况:
- 微生物群代谢物,如三甲基胺N氧化物 (TMAO),越来越多地被认为是它们的系统性作用.
- 与肥胖相关的炎症涉及巨细胞和脂肪组织,可能受到来自肠道的分子的影响.
- 神经炎症是神经退行性疾病的标志,但它与外围因素的联系是一个活跃的研究领域.
研究的目的:
- 调查三甲基胺N氧化物 (TMAO) 作为外周炎症和中枢神经系统 (CNS) 炎症之间的调解者的作用.
- 探索TMAO对脂肪细胞分化,巨细胞激活,血脑屏障完整性以及神经元和微质反应的影响.
主要方法:
- 利用了细胞培养模型,包括3T3-L1前脂质细胞,RAW 264.7巨细胞,人脑微血管内皮细胞 (hCMEC),初级神经元培养和初级微质培养.
- 评估了TMAO对脂肪细胞分化,促炎性细胞因子表达,奥克卢丁水平 (血脑屏障标记物) 和微质细胞化的影响.
主要成果:
- TMAO促进了脂肪细胞的分化,并在巨细胞中增加了促炎性细胞因子的表达.
- 200μM的TMAO度显著降低了hCMECs中的奥克卢丁表达,这表明血脑屏障被破坏.
- TMAO在神经元中增加了亲炎性细胞因子表达,诱导了微质中的亲炎状态,并增强了微质的细胞分裂.
结论:
- 导致TMAO分泌量增加的微生物失生症可能成为外周和中心炎症之间的关键联系.
- 在多种细胞类型中TMAO的促炎作用突出显示了它对神经炎症的潜在贡献.
- 针对TMAO减少的治疗策略可能有利于控制神经退行性疾病.
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