Human Th17 cells engage gasdermin E pores to release IL-1a upon NLRP3 inflammasome activation [Array]
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PROVIDER: PRJNA885796 | ENA |
REPOSITORIES: ENA
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Project description:Human Th17 cells engage gasdermin E pores to release IL-1alpha upon NLRP3 inflammasome activation
| PRJNA893842 | ENA
Project description:Human Th17 cells engage gasdermin E pores to release IL-1a upon NLRP3 inflammasome activation [RNA-seq]
| PRJNA885482 | ENA
Project description:Adaptive immune responses are tailored to the invading microbial antigen and tissue microenvironment, resulting in diverse context-specific inflammatory signatures. There is emerging evidence that innate immune responses coopt adaptive properties such as memory. Whether T cells harness innate immune signaling pathways to diversify their repertoire of effector functions remains unknown. Here, we found that human T cells expressed gasdermin E (GSDME), a membrane pore-forming molecule that has recently been shown to execute pyroptotic cell death and thus to serve as a potential cancer checkpoint. In T cells, GSDME expression was, in contrast, associated with durable viability and was repurposed for the tunneled release of the innate danger signal IL-1. This property was restricted to a subset of human Th17 cells with antigen specificity for C. albicans and was regulated by a T-cell-intrinsic NLRP3 inflammasome and its engagement of a proteolytic cascade of successive caspase-8, caspase-3 and GSDME cleavage following T-cell receptor stimulation and calcium-licensed calpain maturation of the pro-IL1 form. This equipped human Th17 cells with a so far overlooked effector function that contributes to the clearance of C. albicans. Our results propose GSDME pore formation in T cells as a mechanism of unconventional cytokine release through harnessing of innate signaling platforms in response to adaptive stimuli. This finding diversifies the functional repertoire and mechanistic equipment of T cells and thus suggests new therapeutic strategies for targeting the proinflammatory identity of human Th17 cells in anti-fungal host defense.
2022-10-24 | GSE214292 | GEO
Project description:Adaptive immune responses are tailored to the invading microbial antigen and tissue microenvironment, resulting in diverse context-specific inflammatory signatures. There is emerging evidence that innate immune responses coopt adaptive properties such as memory. Whether T cells harness innate immune signaling pathways to diversify their repertoire of effector functions remains unknown. Here, we found that human T cells expressed gasdermin E (GSDME), a membrane pore-forming molecule that has recently been shown to execute pyroptotic cell death and thus to serve as a potential cancer checkpoint. In T cells, GSDME expression was, in contrast, associated with durable viability and was repurposed for the tunneled release of the innate danger signal IL-1a. This property was restricted to a subset of human Th17 cells with antigen specificity for C. albicans and was regulated by a T-cell-intrinsic NLRP3 inflammasome and its engagement of a proteolytic cascade of successive caspase-8, caspase-3 and GSDME cleavage following T-cell receptor stimulation and calcium-licensed calpain maturation of the pro-IL1a form. This equipped human Th17 cells with a so far overlooked effector function that contributes to the clearance of C. albicans. Our results propose GSDME pore formation in T cells as a mechanism of unconventional cytokine release through harnessing of innate signaling platforms in response to adaptive stimuli. This finding diversifies the functional repertoire and mechanistic equipment of T cells and thus suggests new therapeutic strategies for targeting the proinflammatory identity of human Th17 cells in anti-fungal host defense.
2022-10-24 | GSE214519 | GEO
Project description:Adaptive immune responses are tailored to the invading microbial antigen and tissue microenvironment, resulting in diverse context-specific inflammatory signatures. There is emerging evidence that innate immune responses coopt adaptive properties such as memory. Whether T cells harness innate immune signaling pathways to diversify their repertoire of effector functions remains unknown. Here, we found that human T cells expressed gasdermin E (GSDME), a membrane pore-forming molecule that has recently been shown to execute pyroptotic cell death and thus to serve as a potential cancer checkpoint. In T cells, GSDME expression was, in contrast, associated with durable viability and was repurposed for the tunneled release of the innate danger signal IL-1a. This property was restricted to a subset of human Th17 cells with antigen specificity for C. albicans and was regulated by a T-cell-intrinsic NLRP3 inflammasome and its engagement of a proteolytic cascade of successive caspase-8, caspase-3 and GSDME cleavage following T-cell receptor stimulation and calcium-licensed calpain maturation of the pro-IL1a form. This equipped human Th17 cells with a so far overlooked effector function that contributes to the clearance of C. albicans. Our results propose GSDME pore formation in T cells as a mechanism of unconventional cytokine release through harnessing of innate signaling platforms in response to adaptive stimuli. This finding diversifies the functional repertoire and mechanistic equipment of T cells and thus suggests new therapeutic strategies for targeting the proinflammatory identity of human Th17 cells in anti-fungal host defense.
2022-10-24 | GSE214475 | GEO
Project description:S100A8/A9 is a proinflammatory mediator released by myeloid cells during many acute and chronic inflammatory disorders. However, the precise mechanism of its release from the cytosolic compartment of neutrophils is still elusive. We report here that E-selectin-induced rapid S100A8/A9 release during inflammation occurs in a NLRP3 inflammasome-dependent fashion. Mechanistically, E-selectin engagement triggers Bruton?s tyrosine kinase dependent tyrosine phosphorylation of NLRP3. Concomitant potassium efflux via the voltage-gated potassium channel KV1.3 mediates ASC oligomerization. This is followed by caspase-1 cleavage and downstream activation of pore forming gasdermin D, enabling cytosolic S100A8/A9 to be released. Strikingly, E-selectin-mediated gasdermin D pore formation does not result in cell death, but is a transient process involving activation of the ESCRT-III membrane repair machinery. These findings do not only elucidate the molecular mechanisms of controlled S100A8/A9 release but also identify the NLRP3/gasdermin D axis as a rapid and reversible activation system in neutrophils during inflammation.
2023-10-25 | PXD041652 | Pride
Project description:Caspase-1 signaling in myeloid suppressor cells can promote T-cell independent cancer progression, but the regulation of inflammasome signaling within the highly heterogeneous myeloid cells in the tumor milieu remains elusive. To resolve this complexity, scRNA-seq of human head & neck carcinoma identified distinct inflammasome complex genes within specific clusters of tumor-infiltrating myeloid cells. Among these myeloid cells, NLRP3 sensor and downstream effector IL-1β transcripts were enriched in multiple monocytic and macrophage subtypes in the TME. In vivo, we showed that NLRP3, and not AIM2, phenocopied the caspase-1/IL-1β dependent tumor progression. Paradoxically, we found that myeloid-intrinsic caspase-1 signaling within the TME increased myeloid survival without significant intratumoral trafficking as would be predicted from their canonical pyroptotic function. Mechanistically, this myeloid NLRP3/IL-1β signaling axis promotion of tumor growth was found to be gasdermin D independent. When we probed for the tumor intrinsic factors that regulated NLRP3/IL-1β signaling, we found that mononuclear phagocyte-mediated efferocytosis of dying tumor cells in the TME directly activated NLRP3 dependent inflammasome signaling to drive IL-1β secretion and to promote tumor growth. Dynamic RNA velocity analysis of the single cell transcriptomic dataset showed a strong directional flow from efferocytosis gene-sethigh macrophages to an inflammasome gene-sethigh macrophage population. Cumulatively, we provide a novel inflammasome signaling axis between tumor apoptosis and myeloid cells that characterizes chronic inflammation induced malignancy.
2022-04-13 | GSE200560 | GEO
Project description:Inflammasome, activated by pathogen-derived and host-derived danger signals, constitutes a multimolecular signaling complex that serves as a platform for caspase-1 (CASP1) activation and interleukin-1beta (IL1B) maturation. The activation of NLRP3 inflammasome requires two-step signals. The first “priming” signal (Signal 1) enhances gene expression of inflammasome components. The second “activation” signal (Signal 2) promotes the assembly of inflammasome components. Deregulated activation of NLRP3 inflammasome contributes to the pathological processes of Alzheimer’s disease (AD) and multiple sclerosis (MS). However, at present, the precise mechanism regulating NLRP3 inflammasome activation and deactivation remains largely unknown. By genome-wide gene expression profiling, we studied the molecular network of NLRP3 inflammasome activation-responsive genes in a human monocyte cell line THP-1 sequentially given two-step signals. We identified the set of 83 NLRP3 inflammasome activation-responsive genes. Among them, we found the NR4A nuclear receptor family NR4A1, NR4A2, and NR4A3, the EGR family EGR1, EGR2, and EGR3, the IkappaB family NFKBIZ, NFKBID, and NFKBIA as a key group of the genes that possibly constitute a negative feedback loop for shutting down inflammation following NLRP3 inflammasome activation. By molecular network analysis, we identified a complex network of NLRP3 inflammasome activation-responsive genes involved in cellular development and death, and immune and inflammatory responses, where transcription factors AP-1, NR4A, and EGR serve as a hub. Thus, NLRP3 inflammasome activation-responsive genes constitute the molecular network composed of a set of negative feedback regulators for prompt resolution of inflammation. To load the Signal 1 (S1), THP-1 cells were incubated for 3 hours in the culture medium with or without inclusion of 0.2 microgram/ml lipopolysaccharide (LPS). To load the Signal 2 (S2), they were incubated further for 2 hours in the culture medium with inclusion of 10 microM nigericin sodium salt dissolved in ethanol or the equal v/v% concentration of ethanol (vehicle), followed by processing for microarray analysis on Human Gene 1.0 ST Array (Affymetrix).
2014-07-01 | E-GEOD-58959 | biostudies-arrayexpress
Project description:The NLRP3 inflammasome is dysregulated in autoinflammatory disorders caused by inherited mutations and contributes to the pathogenesis of several chronic inflammatory diseases. In this study, we discovered that disulfiram, a safe FDA-approved drug, specifically inhibits the NLRP3 inflammasome, but not the NLRC4 or AIM2 inflammasomes. Disulfiram suppresses caspase-1 activation, ASC speck formation, and pyroptosis induced by several stimuli that activate NLRP3. Mechanistically, NLRP3 is palmitoylated at cysteine 126, a modification required for its localization to the trans-Golgi network and inflammasome activation which was inhibited by disulfiram. Administration of disulfiram to animals inhibited the NLRP3, but not the NLRC4 inflammasome in vivo. Our study uncovers a mechanism by which disulfiram targets NLRP3 and provides a rationale for using a safe FDA-approved drug for the treatment of NLRP3-associated inflammatory diseases.
2024-07-25 | PXD054126 | Pride
Project description:The immune system may respond to engineered nanomaterials (ENM) through inflammatory reactions. The NLRP3 inflammasome responds to a wide range of ENM, and its activation is associated with various inflammatory diseases. The objective of the study was to compare the effects of gold ENM of different shapes on NLRP3 inflammasome activation and related signalling pathways. Differentiated THP-1 cells (wildtype, ASC- or NLRP3-deficient), were exposed to PEGylated gold nanorods, nanostars, and nanospheres. Exposed cells were subjected to gene expression analysis. Nanorods, but not nanostars or nanospheres, showed NLRP3 inflammasome activation. ASC- or NLRP3-deficient cells did not show this effect. Gold nanorod-induced NLRP3 inflammasome activation was accompanied by downregulated sterol/cholesterol biosynthesis, oxidative phosphorylation, and purinergic receptor signalling. In conclusion, the shape and surface chemistry of gold nanoparticles determine NLRP3 inflammasome activation.
2023-05-29 | GSE233641 | GEO