Ectopic colonization of oral bacteria in the intestine drives TH1 cell induction and inflammation

Koji Atarashi, Wataru Suda, Chengwei Luo, Takaaki Kawaguchi, Iori Motoo, Seiko Narushima, Yuya Kiguchi, Keiko Yasuma, Eiichiro Watanabe, Takeshi Tanoue, Christoph A. Thaiss, Mayuko Sato, Kiminori Toyooka, Heba S. Said, Hirokazu Yamagami, Scott A. Rice, Dirk Gevers, Ryan C. Johnson, Julia A. Segre, Kong ChenJay K. Kolls, Eran Elinav, Hidetoshi Morita, Ramnik J. Xavier, Masahira Hattori, Kenya Honda

研究成果: Article査読

363 被引用数 (Scopus)


Intestinal colonization by bacteria of oral origin has been correlated with several negative health outcomes, including inflammatory bowel disease. However, a causal role of oral bacteria ectopically colonizing the intestine remains unclear. Using gnotobiotic techniques, we show that strains of Klebsiella spp. isolated from the salivary microbiota are strong inducers of T helper 1 (TH1) cells when they colonize in the gut. These Klebsiella strains are resistant to multiple antibiotics, tend to colonize when the intestinal microbiota is dysbiotic, and elicit a severe gut inflammation in the context of a genetically susceptible host. Our findings suggest that the oral cavity may serve as a reservoir for potential intestinal pathobionts that can exacerbate intestinal disease.

出版ステータスPublished - 2017 10月 20

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