Abstract
Background
Systemic diseases have been associated with oral health and gut microbiota. We examined the association between oral health and the community composition and structure of the adherent colonic gut microbiota.
Methods
We obtained 197 snap-frozen colonic biopsies from 62 colonoscopy-confirmed polyp-free individuals. Microbial DNA was sequenced for the 16S rRNA V4 region using the Illumina MiSeq, and the sequences were assigned to the operational taxonomic unit based on SILVA. We used a questionnaire to ascertain tooth loss, gum disease, and lifestyle factors. We compared biodiversity and relative abundance of bacterial taxa based on the amount of tooth loss and the presence of gum disease. The multivariable negative binomial regression model for panel data was used to estimate the association between the bacterial count and oral health. False discovery rate-adjusted P value (q value) < .05 indicated statistical significance.
Results
More tooth loss and gum disease were associated with lower bacterial alpha diversity. The relative abundance of Faecalibacterium was lower (q values < .05) with more tooth loss. The association was significant after adjusting for age, ethnicity, obesity, smoking, alcohol use, hypertension, diabetes, and the colon segment. The relative abundance of Bacteroides was higher in those with gum disease.
Conclusions
Oral health was associated with alteration in the community composition and structure of the adherent gut bacteria in the colon. The reduced anti-inflammatory Faecalibacterium in participants with more tooth loss may indicate systemic inflammation. Future studies are warranted to confirm our findings and investigate the systemic role of Faecalibacterium.
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Acknowledgments
We thank David Ramsey, Diane Hutchinson, and Nadim Ajami at Baylor College of Medicine for project management. We thank Ashely Johnson, Sarah Plew, Ava Smith, Liang Chen, and Jocelyn Uriostegui for collecting and processing samples. We thank Dr. David Y. Graham for patient recruitment and manuscript review. We thank Annie Dai for manuscript preparation.
Funding
This study is funded by Cancer Prevention and Research Institute of Texas (RP#140767, PI: Jiao, L; Petrosino, JF), Gillson Longenbaugh Foundation, Golfers Against Cancer organization (PI: Jiao, L), and partly supported by the use of resources and facilities at the Houston VA HSR&D Center for Innovations in Quality, Effectiveness and Safety (CIN13-413) and The Texas Medical Center Digestive Disease Center (P30 DK56338, PI: El-Serag, HB). Jiao received the salary support from the NIH R01CA172880 (PI: Jiao, L). White received the grant support from the U.S. Department of Veterans Affairs (CX001430, PI: White, D). The opinions expressed are those of the authors and not necessarily those of the Department of Veterans Affairs, the US government, or Baylor College of Medicine.
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Xu, A.A., Hoffman, K., Gurwara, S. et al. Oral Health and the Altered Colonic Mucosa-Associated Gut Microbiota. Dig Dis Sci 66, 2981–2991 (2021). https://doi.org/10.1007/s10620-020-06612-9
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DOI: https://doi.org/10.1007/s10620-020-06612-9