Implications of gut microbiota dysbiosis and metabolic changes in prion disease

• Published in: Neurobiology of disease 2020-02, Vol.135, p.104704-104704, Article 104704
• Main Authors: Yang, Dongming, Zhao, Deming, Shah, Syed Zahid Ali, Wu, Wei, Lai, Mengyu, Zhang, Xixi, Li, Jie, Guan, Zhiling, Zhao, Huafen, Li, Wen, Gao, Hongli, Zhou, Xiangmei, Yang, Lifeng
• Format: Article
• Language: English
• Subjects: Animals; Bacteria - pathogenicity; Bile Acids and Salts - analysis; Dysbiosis - metabolism; Dysbiosis - microbiology; Feces - chemistry; Feces - microbiology; Female; Gastrointestinal Microbiome - physiology; Metabolomics; Metabolomics - methods; Mice, Inbred C57BL; Microbiome; Multi-omics analysis; Prion Diseases - microbiology; Prion infection; RNA, Ribosomal, 16S - genetics; Short chain fatty acids
• ISSN: 0969-9961; 1095-953X
• DOI: 10.1016/j.nbd.2019.104704

Evidence of the gut microbiota influencing neurodegenerative diseases has been reported for several neural diseases. However, there is little insight regarding the relationship between the gut microbiota and prion disease. Here, using fecal samples of 12 prion-infected mice and 25 healthy controls, we analyzed the structure of the gut microbiota and metabolic changes by 16S rRNA sequencing and LC-MS–based metabolomics respectively as multi-omic analyses. Additionally, SCFAs and common amino acids were detected by GC–MS and UPLC respectively. Enteric changes induced by prion disease affected both structure and abundances of the gut microbiota. The gut microbiota of infected mice displayed greater numbers of Proteobacteria and less Saccharibacteria at the phylum level and more Lactobacillaceae and Helicobacteraceae and less Prevotellaceae and Ruminococcaceae at the family level. A total of 145 fecal metabolites were found to be significantly different in prion infection, and most (114) of these were lipid metabolites. Using KEGG pathway enrichment analysis, we found that 3 phosphatidylcholine (PC) compounds significantly decreased and 4 hydrophobic bile acids significantly increased. Decreases of 8 types of short-chain acids (SCFAs) and increases of Cys and Tyr and decreases of His, Trp, and Arg were observed in prion infection. Correlation analysis indicated that the gut microbiota changes observed in our study may have been the shared outcome of prion disease. These findings suggest that prion disease can cause significant shifts in the gut microbiota. Certain bacterial taxa can then respond to the resulting change to the enteric environment by causing dramatic shifts in metabolite levels. Our data highlight the health impact of the gut microbiota and related metabolites in prion disease. •Altered compositions of gut microbiota were found in prion disease infectious mice.•Related metabolites, amino acids and short chain fatty acids were changed significantly with prion disease.•Based on multi-omics analyses, related gut bacterial communities and metabolites were associated with the prion disease.