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Caenorhabditis elegans

ABSTRACT: Innate host defense requires TFEB-mediated transcription of cytoprotective and antimicrobial genes

PROVIDER: PRJNA247976 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1290430.fastq.gz	Fastqsanger.gz
	SRR1290431.fastq.gz	Fastqsanger.gz
	SRR1290432.fastq.gz	Fastqsanger.gz
	SRR1290433.fastq.gz	Fastqsanger.gz
	SRR1290426.fastq.gz	Fastqsanger.gz

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Transcription profile analysis of wild type and Irf9-/- human monocytic THP1 cells in response to type I interferons

Project description:Host defense by the innate immune system requires the establishment of antimicrobial states allowing cells to cope with microorganisms before the onset of the adaptive immune response. Interferons (IFN) are of vital importance in the establishment of cell-autonomous antimicrobial immunity. Speed is therefore an important attribute of the cellular response to IFN. With much of the antimicrobial response being installed de novo, this pertains foremost to gene expression, the rapid switch between resting-state and active-state transcription of host defense genes. Our results show how mRNA expression changes upon IFNb treatment in wild type and Irf9-/- THP1 cells.

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Transcription profile analysis of wild type and Irf9-/- mouse embryonic fibroblasts (MEF) in response to type I interferons

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Transcription profile analysis of wild type and Irf9-/- bone marrow derived macrophages in response to type I and type II interferons

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Project description:A role for vitamin A in host defense against Mycobacterium tuberculosis has been suggested through epidemiological and in vitro studies; however, the antimicrobial mechanism is unclear. Here, we demonstrate that vitamin A mediates host defense through regulation of cellular cholesterol content. Comparison of monocytes stimulated with all-trans retinoic acid (ATRA) or 1,25-dihydroxyvitamin D3, the biologically active forms of vitamin A and vitamin D respectively, indicates that ATRA and 1,25D3 induce mechanistically distinct antimicrobial activities. Gene expression profiling reveals that ATRA but not 1,25D3 triggers a lipid metabolism and efflux pathway, including expression of lysosomal lipid transport gene NPC2. ATRA-induced decrease in total cellular cholesterol content, subcellular lipid reorganization, lysosomal acidification and antimicrobial activity are all dependent upon expression of NPC2. Finally, the addition of HIV-protease inhibitors known to inhibit cholesterol efflux, Ritonavir and Nelfinavir, blocked both ATRA-induced cholesterol decrease as well as antimicrobial activity. Taken together, these results suggest that the vitamin A-mediated host defense mechanism against M. tuberculosis requires regulation of cellular cholesterol. Monocytes derived from four independent healthy blood donors that were stimulated with control (CTRL), ATRA or 1,25D3 at 10-8M for 18 hours.

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STAT1, STAT2 and IRF9 transcription factor binding analysis in wild type human monocytic THP1 cells in response to type I interferons

Project description:Host defense by the innate immune system requires the establishment of antimicrobial states allowing cells to cope with microorganisms before the onset of the adaptive immune response. Interferons (IFN) are of vital importance in the establishment of cell-autonomous antimicrobial immunity. Speed is therefore an important attribute of the cellular response to IFN. With much of the antimicrobial response being installed de novo, this pertains foremost to gene expression, the rapid switch between resting-state and active-state transcription of host defense genes. Mechanisms to meet this demand on the relevant molecular machinery include remodeling of chromatin but also changes in transcription factor interaction prior and during the IFN response. Our results show how transcription factors STAT1, STAT2 and IRF9 change binding patterns upon IFNb treatment in wild type human monocytic THP1 cells.

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STAT1, STAT2 and IRF9 transcription factor binding analysis in wild type mouse embryonic fibroblasts (MEF) in response to type I interferons

Project description:Host defense by the innate immune system requires the establishment of antimicrobial states allowing cells to cope with microorganisms before the onset of the adaptive immune response. Interferons (IFN) are of vital importance in the establishment of cell-autonomous antimicrobial immunity. Speed is therefore an important attribute of the cellular response to IFN. With much of the antimicrobial response being installed de novo, this pertains foremost to gene expression, the rapid switch between resting-state and active-state transcription of host defense genes. Mechanisms to meet this demand on the relevant molecular machinery include remodeling of chromatin but also changes in transcription factor interaction prior and during the IFN response. Our results show how transcription factors STAT1, STAT2 and IRF9 change binding patterns upon IFNb treatment in wild type mouse embryonic fibroblasts.

2019-05-28 | GSE128107 | GEO

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Project description:Host defense by the innate immune system requires the establishment of antimicrobial states allowing cells to cope with microorganisms before the onset of the adaptive immune response. Interferons (IFN) are of vital importance in the establishment of cell-autonomous antimicrobial immunity. Speed is therefore an important attribute of the cellular response to IFN. With much of the antimicrobial response being installed de novo, this pertains foremost to gene expression, the rapid switch between resting-state and active-state transcription of host defense genes. Mechanisms to meet this demand on the relevant molecular machinery include remodeling of chromatin but also changes in transcription factor interaction prior and during the IFN response. Our results show how transcription factors STAT1, STAT2 and IRF9 change binding patterns upon IFNb or IFNg treatment in wild type and Irf9-/- bone marrow derived macrophages.

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MyD88-mediated signaling in intestinal fibroblasts regulates macrophage antimicrobial defense and prevents dysbiosis in the gut IV

Project description:Fibroblasts that reside in the gut mucosa are among the key regulators of innate immune cells, but their role in the regulation of the defense functions of macrophages remains unknown. MyD88 is suggested to shape fibroblast responses in the intestinal microenvironment. We found that mice lacking MyD88 in fibroblasts showed a decrease in the colonic antimicrobial defense, developing dysbiosis and aggravated DSS-induced colitis. These pathological changes were associated with accumulation of Arginase 1+ macrophages with low antimicrobial defense capability. Mechanistically, production of IL-6 and CCL2 downstream of MyD88 was critically involved in fibroblast-mediated support of macrophage antimicrobial function, and IL-6/CCL2 neutralization resulted in the generation of macrophages with decreased production of antimicrobial peptide cathelicidin and impaired bacterial clearance. Collectively, these findings revealed a critical role of fibroblast-intrinsic MyD88 signaling in regulating macrophage antimicrobial defense under colonic homeostasis, and its disruption results in dysbiosis, predisposing host to the development of intestinal inflammation.

2025-03-05 | GSE291184 | GEO

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