The Shigella flexneri virulence factor apyrase is released inside eukaryotic cells to hijack host cell fate

福氏志贺氏菌毒力因子腺苷三磷酸双磷酸酶在真核细胞内释放,劫持宿主细胞的命运

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作者:Lisa Perruzza, Carlo Zagaglia, Laura Vitiello, Meysam Sarshar, Francesco Strati, Martina Pasqua, Fabio Grassi, Mauro Nicoletti, Anna Teresa Palamara, Cecilia Ambrosi #, Daniela Scribano #

Abstract

In this paper, we demonstrated that apyrase is released within the host cell cytoplasm during infection to target the intracellular ATP pool. By degrading intracellular ATP, apyrase contributes to prevent caspases activation, thereby inhibiting the activation of pyroptosis in infected cells. Our results show, for the first time, that apyrase is involved in the modulation of host cell survival, thereby aiding this pathogen to dampen the inflammatory response. This work adds a further piece to the puzzle of Shigella pathogenesis. Due to its increased spread worldwide, prevention and controlling strategies are urgently needed. Overall, this study highlighted apyrase as a suitable target for an anti-virulence therapy to tackle this pathogen.

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