Gut microbiota-generated short-chain fatty acids are involved in para-chlorophenylalanine-induced cognitive disorders

Neurocognitive disorders (NCDs) include complex and multifactorial diseases that affect many patients. The 5-hydroxytryptamine (5-HT) neuron system plays an important role in NCDs. Existing studies have reported that para-chlorophenylalanine (PCPA), a 5-HT scavenger, has a negative effect on cognitive function. However, we believe that PCPA may result in NCDs through other pathways. To explore this possibility, behavioral tests were performed to evaluate the cognitive function of PCPA-treated mice, suggesting the appearance of cognitive dysfunction and depression-like behavior. Furthermore, 16S rRNA and metabolomic analyses revealed that dysbiosis and acetate alternation could be related to PCPA-induced NCDs. Our results suggest that not only 5-HT depletion but also dysbiosis and acetate alternation contributed to PCPA-related NCDs. Specifically, the latter promotes NCDs by reducing short-chain fatty acid levels. Together, these findings provide an alternative perspective on PCPA-induced NCDs.

Automated summary

Neurocognitive disorders are complex and multifactorial diseases, where the 5-hydroxytryptamine neuron system plays an important role. Previous studies have shown that 5-hydroxytryptamine scavengers can negatively affect cognitive function and potentially lead to neurocognitive disorders through other pathways. Behavioral tests on mice treated with a 5-hydroxytryptamine scavenger showed cognitive dysfunction and depression-like behavior. Dysbiosis and acetate alternation were found to be related to the development of neurocognitive disorders induced by the 5-hydroxytryptamine scavenger.