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IFN-λ is protective against lethal oral Toxoplasma gondii infection.

ABSTRACT: Interferons are essential for innate and adaptive immune responses against a wide variety of pathogens. Interferon lambda (IFN-λ) protects mucosal barriers during pathogen exposure. The intestinal epithelium is the first contact site for Toxoplasma gondii (T. gondii) with its hosts and the first defense line that limits parasite infection. Knowledge of very early T. gondii infection events in the gut tissue is limited and a possible contribution of IFN-λ has not been investigated so far. Here, we demonstrate with systemic interferon lambda receptor (IFNLR1) and conditional (Villin-Cre) knockout mouse models and bone marrow chimeras of oral T. gondii infection and mouse intestinal organoids a significant impact of IFN-λ signaling in intestinal epithelial cells and neutrophils to T. gondii control in the gastrointestinal tract. Our results expand the repertoire of interferons that contribute to the control of T. gondii and may lead to novel therapeutic approaches against this world-wide zoonotic pathogen.

SUBMITTER: Murillo-Leon M 

PROVIDER: S-EPMC9980175 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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IFN-λ is protective against lethal oral <i>Toxoplasma gondii</i> infection.

Murillo-León Mateo M   Bastidas-Quintero Aura M AM   Endres Niklas S NS   Schnepf Daniel D   Delgado-Betancourt Estefanía E   Ohnemus Annette A   Taylor Gregory A GA   Schwemmle Martin M   Staeheli Peter P   Steinfeldt Tobias T  

bioRxiv : the preprint server for biology 20230224

Interferons are essential for innate and adaptive immune responses against a wide variety of pathogens. Interferon lambda (IFN-λ) protects mucosal barriers during pathogen exposure. The intestinal epithelium is the first contact site for <i>Toxoplasma gondii</i> (<i>T. gondii</i>) with its hosts and the first defense line that limits parasite infection. Knowledge of very early <i>T. gondii</i> infection events in the gut tissue is limited and a possible contribution of IFN-λ has not been investi  ...[more]

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