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Impaired interferon-γ signaling promotes the development of silicosis

ABSTRACT: Impaired interferon-γ signaling promotes the development of silicosis

PROVIDER: PRJNA731230 | ENA |

REPOSITORIES: ENA

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Impaired interferon-γ signaling promotes the development of silicosis

Project description:Silicosis is caused by inhalation of crystalline silica dust particles and known as one of the most serious occupational diseases worldwide. However, little is known about intrinsic factors leading to disease susceptibility. Using single-cell sequencing of bronchoalveolar lavage fluid (BALF) of mine workers with silicosis and their co-workers who did not develop silicosis, we found that the impaired interferon (IFN)-γ signaling in myeloid cells was strongly associated with the occurrence of silicosis. In a murine model of silicosis, global or myeloid cell-specific deletion of interferon γ receptor (IFN-γR) markedly enhanced the silica crystals-induced pulmonary interstitial fibrosis and respiratory dysfunction in wild-type but not in mutant mice deficient in NOD-like receptor family pyrin domain-containing 3 (NLRP3). In vitro, IFN-γ priming of macrophages suppressed the crystalline silica-induced NLRP3 inflammasome activation partly by inducing the formation of spacious phagosomes with relatively reduced ratio of crystalline silica/phagosomal areas/volumes through the RAB20-dependent membrane trafficking pathway. RAB20 deficiency was associated with the elevated susceptibility to silicosis as well as the elevated NLRP3 inflammasome activation in a manner similar to the impaired IFN-γ signaling. Thus, these findings provide novel molecular insights into the intricate mechanisms underlying innate immunity-mediated host responses to environmental irritants, and shed light on the future development of novel therapies for the prevention of silicosis.

2022-05-19 | GSE174725 | GEO

Interferon-gamma signaling promotes melanoma progression and metastasis

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Conserved interferon-gamma signaling and decreased immune exclusion programs in responses to immune checkpoint blockade therapy

Project description:We analyzed baseline and on-therapy tumor biopsies from 101 patients with advanced melanoma treated with nivolumab (anti-PD-1) alone or combined with ipilimumab (anti-CTLA-4). Analysis of whole transcriptome data showed that T cell infiltration and interferon-gamma signaling signatures corresponded most highly with clinical response to therapy, with a reciprocal decrease in cell cycle and WNT signaling pathways in responding biopsies. Clinical outcome differences were likely not due to differential melanoma cell responses to interferon-gamma, as 57 human melanoma cell lines exposed in vitro to this cytokine showed a conserved interferon-gamma transcriptome response unless they had mutations that precluded signaling from the interferon-gamma receptor. Therefore, the magnitude of the antitumor T cell response and the corresponding downstream interferon-gamma signaling are the main drivers of clinical response or resistance to immune checkpoint blockade therapy.

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Impaired interferon-γ signaling promotes the development of silicosis.

Project description:Silicosis is caused by inhalation of crystalline silica dust particles and known as one of the most serious occupational diseases worldwide. However, little is known about intrinsic factors leading to disease susceptibility. Single-cell sequencing of bronchoalveolar lavage fluid cells of mine workers with silicosis and their co-workers who did not develop silicosis revealed that the impaired interferon (IFN)-γ signaling in myeloid cells was strongly associated with the occurrence of silicosis. Global or myeloid cell-specific deletion of interferon γ receptor (IFN-γR) markedly enhanced the crystalline silica-induced pulmonary injury in wild-type but not in NLRP3 deficient mice. In vitro, IFN-γ priming of macrophages suppressed the crystalline silica-induced NLRP3 inflammasome activation partly by inducing the formation of spacious phagosomes with relatively reduced ratio of crystalline silica/phagosomal areas volumes to resistant crystalline silica-induced lysosomal membrane damage. Thus, these findings provide molecular insights into the intricate mechanisms underlying innate immunity-mediated host responses to environmental irritants.

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A requirement for interferon gamma signaling in injury induced cartilage regeneration

Project description:To elucidate the requirement of interferon gamma signaling in cartilage regeneration, we generated genetically interferon gamma receptor 1 or interferon gamma deficient mice. We then performed gene expression profiling analysis using data obtained from RNA-seq of injured cartilages from young and adult mice at two time points.

2024-04-10 | GSE232013 | GEO

Analysis of astrocyte interferon gamma signaling during EAE.

Project description:We identify pathways regulated by interferon gamma in astrocytes during EAE

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Interferon (IFN)-γ promotes monocyte-mediated lung injury during influenza pathogenesis

Project description:Interferon (IFN)-γ promotes monocyte-mediated lung injury during influenza pathogenesis

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Interferon (IFN)-γ promotes monocyte-mediated lung injury during influenza pathogenesis

Project description:Influenza A Virus (IAV) triggers an exuberant host response that promotes acute lung injury. However, the determinants of the pathological host response to IAV remain incompletely understood. In the current study, we identified interferon (IFN)-γ-regulated subset of monocytes, CCR2+ monocytes, as a driver of lung damage during IAV pathogenesis. IFN-γ regulated the recruitment and inflammatory phenotype of CCR2+ monocytes, and CCR2 (CCR2-/-) and IFN-γ (IFN-γ-/-) deficient mice exhibited reduced lung inflammation, pathology, and increased resistance against bacterial co-infection by Streptococcus pneumoniae (Spn). Adoptive transfer of WT (IFN-γR1+), but not IFN-γR1 deficient (IFN-γR1-) CCR2+ monocytes, restored the wild-type (WT)-like pathological phenotype of lung damage in IAV-infected CCR2-/- mice. The CD8+ T cells were the most significant source of IFN-γ in IAV-infected lungs. Collectively, our data highlight that IFN-γ regulates CCR2+ monocyte-mediated lung pathology during IAV pathogenesis.

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