T lymphocyte-dependent IL-10 down-regulates a cytokine storm driven by GRA24.

As a model organism in the study of immunity to infection, has been instrumental in establishing key principles of host anti-microbial defense and its regulation. Here, we employed an attenuated uracil auxotroph strain of Type I designated OMP to further untangle the early immune response to this parasitic pathogen. Experiments using αβ T cell-deficient mice unexpectedly revealed that an intact αβ T lymphocyte compartment was essential to survive infection with OMP.

Impact of MyD88, Microbiota, and Location on Type 1 and Type 3 Innate Lymphoid Cells during Infection.

induces strong IFN-γ-based immunity. Innate lymphoid cells (ILC), in particular ILC1, are an important innate source of this protective cytokine during infection. Our objective was to determine how MyD88-dependent signaling influences ILC function during peroral compared with i.

Impact of IFN-y and CD40 signalling on Toxoplasma gondii cyst formation in differentiated Neuro-2a neuroblastoma cells.

Signalling by IFN-y and CD40 is known to trigger anti-microbial activity in macrophages infected with Toxoplasma gondii, but their effects on infected neurons are less well known. Here, we compared how stimulation with IFN-y and an agonistic anti-CD40 mAb impacts infection and cyst formation in the mouse neuroblastoma cell line Neuro-2a relative to bone marrow-derived macrophages. Both IFN-y and CD40 mAb decreased cyst emergence in Neuro-2a cells.

Induction of IL-12p40 and type 1 immunity by Toxoplasma gondii in the absence of the TLR-MyD88 signaling cascade.

Toxoplasma gondii is an orally acquired pathogen that induces strong IFN-γ based immunity conferring protection but that can also be the cause of immunopathology. The response in mice is driven in part by well-characterized MyD88-dependent signaling pathways. Here we focus on induction of less well understood immune responses that do not involve this Toll-like receptor (TLR)/IL-1 family receptor adaptor molecule, in particular as they occur in the intestinal mucosa.

Transcriptomics analysis of Toxoplasma gondii-infected mouse macrophages reveals coding and noncoding signatures in the presence and absence of MyD88.

Background: Toxoplasma gondii is a globally distributed protozoan parasite that establishes life-long asymptomatic infection in humans, often emerging as a life-threatening opportunistic pathogen during immunodeficiency. As an intracellular microbe, Toxoplasma establishes an intimate relationship with its host cell from the outset of infection. Macrophages are targets of infection and they are important in early innate immunity and possibly parasite dissemination throughout the host.