B cell senescence promotes age-related changes in oral microbiota.

Hiroya Mizuno, Shimpei Kawamoto, Ken Uemura, Jeong Hoon Park, Nozomi Hori, Yumiko Okumura, Yusuke Konishi, Eiji Hara

Department of Molecular Biology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.Department of Molecular Biology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan. · pubmed

Paper

Abstract

In recent years, there has been increasing attention towards understanding the relationship between age-related alterations in the oral microbiota and age-associated diseases, with reports emphasizing the significance of maintaining a balanced oral microbiota for host health. However, the precise mechanisms underlying age-related changes in the oral microbiota remain elusive. We recently reported that cellular senescence of ileal germinal center (GC) B cells, triggered by the persistent presence of commensal bacteria, results in diminished IgA production with aging and subsequent alterations in the gut microbiota. Consequently, we hypothesize that a similar phenomenon may occur in the oral cavity, potentially contributing to age-related changes in the oral microbiota. Examination of p16-luc mice, wherein the expression of the senescent cell marker p16

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Research summary

The paper explores the relationship between B cell senescence and changes in the oral microbiota, which is relevant to understanding age-related biological processes. However, it primarily focuses on the mechanisms of microbial changes rather than addressing root causes of aging or lifespan extension. The findings may contribute to the field but do not represent a significant advancement or breakthrough.

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