Alzheimer’s disease (AD) is a complex neurodegenerative disorder characterized by progressive cognitive impairment. In recent years, the “gut-brain axis” has been recognized to play an important role in the pathogenesis of AD, with the gut microbiota-derived metabolites serving as key mediators of gut-brain communication. This review systematically summarizes the alterations and underlying molecular mechanisms of five classes of key metabolites—short-chain fatty acids, bile acids, indole derivatives, trimethylamine N-oxide, and lipopolysaccharides—during the progression of AD. This review not only provides new perspectives for understanding the pathological processes of AD but also lays a theoretical foundation for the development of diagnostic and therapeutic strategies based on microbiota modulation.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |