Michiel Goris, Katiuska Passelli, Sanam Peyvandi, Miriam Díaz-Varela, Oaklyne Billion, Borja Prat-Luri, Benjamin Demarco, Chantal Desponds, Manon Termote, Eva Iniguez, Somaditya Dey, Bernard Malissen, Shaden Kamhawi, Benjamin P. Hurrell, Petr Broz, Fabienne Tacchini-Cottier
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引用次数: 0
Abstract
Intracellular pathogens that replicate in host myeloid cells have devised ways to inhibit the cell’s killing machinery. Pyroptosis is one of the host strategies used to reduce the pathogen replicating niche and thereby control its expansion. The intracellular Leishmania parasites can survive and use neutrophils as a silent entry niche, favoring subsequent parasite dissemination into the host. Here, we show that Leishmania mexicana induces NLRP1- and caspase-1-dependent Gasdermin D (GSDMD)-mediated pyroptosis in neutrophils, a process critical to control the parasite-induced pathology. In the absence of GSDMD, we observe an increased number of infected dermal neutrophils two days post-infection. Using adoptive neutrophil transfer in neutropenic mice, we show that pyroptosis contributes to the regulation of the neutrophil niche early after infection. The critical role of neutrophil pyroptosis and its positive influence on the regulation of the disease outcome was further demonstrated following infection of mice with neutrophil-specific deletion of GSDMD. Thus, our study establishes neutrophil pyroptosis as a critical regulator of leishmaniasis pathology.
期刊介绍:
Bacteria, fungi, parasites, prions and viruses cause a plethora of diseases that have important medical, agricultural, and economic consequences. Moreover, the study of microbes continues to provide novel insights into such fundamental processes as the molecular basis of cellular and organismal function.