摘要
据推测,肠道微生物群组成的变化(称为肠道微生物菌群失调)可能与阿尔茨海默病 (AD) 的发病有关,阿尔茨海默病是痴呆的最常见原因,其特征是与淀粉样蛋白-β(Aβ)斑块的形成。肠道菌群失调诱导大量淀粉样蛋白、脂多糖和神经毒素的释放,这些物质可能在调节信号通路和免疫激活中发挥作用,导致与 AD 发病机制相关的促炎细胞因子的产生。肠道菌群失调与多种疾病有关,如 2 型糖尿病、肥胖、高血压,以及一些神经精神疾病,如抑郁、焦虑和压力。可以想象,这些疾病会引发 AD 的发作。因此,通过补充益生菌和益生元来改变肠道菌群组成可以减少抑郁和焦虑症状,降低应激反应,并改善记忆力。这篇叙述性综述旨在研究肠道微生物菌群失调在 AD 发病机制中的可能作用。
关键词: 阿尔茨海默病、β-淀粉样蛋白、脂多糖、血脑屏障、肠道微生物失调、2 型糖尿病、肥胖症。
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