Abstract
Background/aims
The gut virome is mainly composed of bacteriophages and influences gut homeostasis and pathogenic conditions. In this study, we analyzed the gut prokaryotic virome in Japanese patients with Crohn’s disease (CD).
Materials/methods
We collected 19 fecal samples from CD patients and 16 samples from healthy controls. The gut bacteriome was analyzed by 16S rRNA gene sequencing and the virome was profiled by shotgun metagenomic sequencing.
Results
Despite no differences in richness and evenness, there was a significant difference in the overall structure of the gut virome between CD patients and controls (P = 0.013). CrAssphage and Staphylococcus virus, belonging to the order Caudovirales, were dominant in the gut virome of controls and CD patients. The abundance of crAssphage was significantly greater in CD patients than controls (P = 0.021). Lactococcus, Enterococcus and Lactobacillus phages were present only in CD patients, while Xanthomonas and Escherichia phages were unique to the controls. In the gut bacteriome of CD patients, richness and evenness were significantly lower, and a significant difference in the overall structure was observed between groups (P = 0.014). The gut bacteriome of CD patients was characterized by a decrease of the genera Faecalibacterium, Roseburia, and Ruminococcus and an increase of the family Enterobacteriaceae. There were more significant correlations between viruses and bacteria in CD patients than controls.
Conclusions
The gut virome of CD patients was distinct from that of healthy controls in a Japanese population. An altered gut virome may be one of the factors associated with the bacterial dysbiosis of CD.
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Change history
28 June 2022
A Correction to this paper has been published: https://doi.org/10.1007/s00535-022-01900-9
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Acknowledgements
This work was supported by the Japan Agency for Medical Research and Development (AMED) under Grant Number JP20gm1010008h9904 (AA), and in part by a Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan under grant number 22K07664 and 22K08054 (AA), and in part by a Health and Labour Sciences Research Grants for Research on Intractable Diseases from the Ministry of Health, Labour and Welfare of Japan under Grant Number 20FC1037 (AA).
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Imai, T., Inoue, R., Nishida, A. et al. Features of the gut prokaryotic virome of Japanese patients with Crohn’s disease. J Gastroenterol 57, 559–570 (2022). https://doi.org/10.1007/s00535-022-01882-8
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DOI: https://doi.org/10.1007/s00535-022-01882-8