Influence of Porphyromonas gingivalis in gut microbiota of streptozotocin-induced diabetic mice

Anri Ohtsu, Yasuo Takeuchi*, Sayaka Katagiri, Wataru Suda, Shogo Maekawa, Takahiko Shiba, Rina Komazaki, Sayuri Udagawa, Naoki Sasaki, Masahira Hattori, Yuichi Izumi

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    33 Citations (Scopus)


    Objectives: Increasing evidence suggests that periodontitis can exacerbate diabetes, and gut bacterial dysbiosis appears to be linked with the diabetic condition. The present study examined the effects of oral administration of the periodontopathic bacterium, Porphyromonas gingivalis, on the gut microbiota and systemic conditions in streptozotocin-induced diabetic mice. Materials and Methods: Diabetes was induced by streptozotocin injection in C57BL/6J male mice (STZ). STZ and wild-type (WT) mice were orally administered P. gingivalis (STZPg, WTPg) or saline (STZco, WTco). Feces were collected, and the gut microbiome was examined by 16S rRNA gene sequencing. The expression of genes related to inflammation, epithelial tight junctions, and glucose/fatty acid metabolism in the ileum or liver were examined by quantitative PCR. Results: The relative abundance of several genera, including Brevibacterium, Corynebacterium, and Facklamia, was significantly increased in STZco mice compared to WTco mice. The relative abundances of Staphylococcus and Turicibacter in the gut microbiome were altered by oral administration of P. gingivalis in STZ mice. STZPg mice showed higher concentrations of fasting blood glucose and inflammatory genes levels in the ileum, compared to STZco mice. Conclusions: Oral administration of P. gingivalis altered the gut microbiota and aggravated glycemic control in streptozotocin-induced diabetic mice.

    Original languageEnglish
    JournalOral Diseases
    Publication statusPublished - 2019 Jan 1


    • gut microbiota
    • periodontitis
    • streptozotocin

    ASJC Scopus subject areas

    • Otorhinolaryngology
    • Dentistry(all)


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