Bacterial Toxins Induce Non-canonical Migracytosis to Aggravate Acute Inflammation

Overview

Journal Cell Discov

Date 2024 Nov 5

PMID 39500876

Authors

Diyin Li

Qi Yang

Jianhua Luo

Yangyushuang Xu

Jingqing Li

Liang Tao

Affiliations

Soon will be listed here.

Abstract

Migracytosis is a recently described cellular process that generates and releases membrane-bound pomegranate-like organelles called migrasomes. Migracytosis normally occurs during cell migration, participating in various intercellular biological functions. Here, we report a new type of migracytosis induced by small GTPase-targeting toxins. Unlike classic migracytosis, toxin-induced migrasome formation does not rely on cell migration and thus can occur in both mobile and immobile cells. Such non-canonical migracytosis allows the cells to promptly respond to microbial stimuli such as bacterial toxins and effectors and release informative cellular contents in bulk. We demonstrated that C. difficile TcdB3 induces liver endothelial cells and Kupffer cells to produce migrasomes in vivo. Moreover, the migracytosis-defective Tspan9 mice show less acute inflammation and lower lethality rate in the toxin challenge assay. Therefore, we propose that the non-canonical migracytosis acts as a new mechanism for mammalian species to sense and exacerbate early immune response upon microbial infections.

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