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STAT4 promotes Bhlhe40 induction to drive protective IFN-g from natural killer cells during viral infection [STAT4 CUT&RUN]

ABSTRACT: NK cells represent a cellular component of the mammalian innate immune system, and mount rapid responses against viral infection, including the secretion of the potent anti-viral effector cytokine IFN-g. Following mouse cytomegalovirus (MCMV) infection, Bhlhe40 was the most highly induced transcription factor in NK cells among the basic helix-loop-helix family. Bhlhe40 upregulation in NK cells depended upon IL-12 and IL-18 signals, with the promoter of Bhlhe40 enriched for STAT4 and the permissive histone H3K4me3, and STAT4-deficient NK cells showing an impairment of Bhlhe40 induction and diminished H3K4me3. Transcriptomic and protein analysis of Bhlhe40-deficient NK cells revealed a defect in IFN-g production during MCMV infection, resulting in diminished protective immunity following viral challenge. Finally, we provide evidence that Bhlhe40 directly promotes IFN-g by binding throughout the Ifng loci in activated NK cells. Thus, our study reveals how STAT4-mediated control of Bhlhe40 drives protective IFN-g secretion by NK cells during viral infection.

ORGANISM(S): Mus musculus

PROVIDER: GSE242911 | GEO | 2023/09/13

REPOSITORIES: GEO

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STAT4 promotes Bhlhe40 induction to drive protective IFN-g from natural killer cells during viral infection [RNA-Seq]

Project description:NK cells represent a cellular component of the mammalian innate immune system, and mount rapid responses against viral infection, including the secretion of the potent anti-viral effector cytokine IFN-g. Following mouse cytomegalovirus (MCMV) infection, Bhlhe40 was the most highly induced transcription factor in NK cells among the basic helix-loop-helix family. Bhlhe40 upregulation in NK cells depended upon IL-12 and IL-18 signals, with the promoter of Bhlhe40 enriched for STAT4 and the permissive histone H3K4me3, and STAT4-deficient NK cells showing an impairment of Bhlhe40 induction and diminished H3K4me3. Transcriptomic and protein analysis of Bhlhe40-deficient NK cells revealed a defect in IFN-g production during MCMV infection, resulting in diminished protective immunity following viral challenge. Finally, we provide evidence that Bhlhe40 directly promotes IFN-g by binding throughout the Ifng loci in activated NK cells. Thus, our study reveals how STAT4-mediated control of Bhlhe40 drives protective IFN-g secretion by NK cells during viral infection.

2023-09-13 | GSE235608 | GEO

STAT4 promotes Bhlhe40 induction to drive protective IFN-g from natural killer cells during viral infection [IL18R1KO RNA-seq]

2023-09-28 | GSE244300 | GEO

STAT4 promotes Bhlhe40 induction to drive protective IFN-g from natural killer cells during viral infection [BHLHE40 CUT&RUN]

2023-09-13 | GSE242900 | GEO

Transcription factor IRF8 orchestrates the adaptive natural killer cell response

Project description:Natural killer (NK) cells are innate lymphocytes that have been recently appreciated to display features of adaptive immunity in response to viral infection. Biallelic mutations in the IRF8 gene have been reported to cause familial NK cell deficiency and susceptibility to severe viral infection in humans; however, the precise role of this transcription factor in regulating NK cell function remained unknown. Here, we show that IRF8 is required in a cell-intrinsic manner for NK cell-mediated protection against mouse cytomegalovirus (MCMV) infection. During exposure to MCMV, IRF8 is robustly upregulated in NK cells by IL-12 and STAT4, which promotes epigenetic remodeling of the Irf8 locus. Moreover, IRF8 facilitates the proliferative burst of virus-specific NK cells by promoting expression of a suite of DNA replication and cell cycle genes, and directly regulating Zbtb32, a master regulator of NK cell proliferation during viral challenge. These results identify a novel function and cell-type specific regulation for IRF8 in host antiviral immunity, and provide a mechanistic understanding of virus susceptibility in patients with IRF8 mutations.

2018-05-16 | GSE112948 | GEO

Divergent roles for STAT4 in shaping effector differentiation of ILC1 and NK cells during gut inflammation I

Project description:Natural killer (NK) cells and type 1 innate lymphoid cells (ILC1) require the transcription factor STAT4 to elicit rapid effector responses and protect against pathogens. Herein, by combining genetic and transcriptomic approaches, we revealed that STAT4 played an unexpected divergent role in regulating effector differentiation of murine ILC1 and NK cells, during intestinal inflammation. Stat4 deletion in Ncr1-expressing cells led to an increased generation of cytotoxic ILC1 in the inflamed large intestine. By contrast, Stat4-deficient NK cells showed impaired terminal differentiation, characterized by lower levels of IRF-8 and KLRG1. STAT4 expression in NCR+ innate lymphocytes restrained gut inflammation and controlled both systemic IFN-g levels and the number of type 2 adaptive T cells in the large intestine. Collectively our data shed light on shared and distinctive mechanisms of transcriptional regulation driven by STAT4 in NK cells and ILC1 required for protection during intestinal inflammation.

2023-09-28 | GSE210483 | GEO

Divergent roles for STAT4 in shaping effector differentiation of ILC1 and NK cells during gut inflammation II

2023-09-28 | GSE210977 | GEO

Transcriptional regulation of adaptive NK and CD8 T cell responses [RNA-Seq]

Project description:Natural killer (NK) cells are innate lymphocytes that possess features of adaptive immunity such as clonal expansion and generation of long-lived memory. Here we look at transcriptional profiles of NK cells throughout several time points during MCMV infection, ex-vivo cytokine stimulation, and/or deficiency of key transcription factors such as STAT4, STAT1, and Runx1. In addition, we profile parallel time points of MCMV-specific CD8 T cells during infection and memory formation.

2017-12-20 | GSE106138 | GEO

STAT4 and T-bet control follicular helper T cells development in viral infections [ATAC-seq]

Project description:Follicular helper T (Tfh) cells promote germinal center (GC) B cell survival and proliferation, and guide their differentiation and Ig isotype switching by delivering contact-dependent and soluble factors, including IL-21, IL-4, IL-9, and IFN-g. IL-21 and IFN-g are co-expressed by Tfh cells during acute and chronic infections, but transcriptional regulation of these cytokines in the GC is incompletely understood. We show that the Th1 transcriptional regulators T-bet and STAT4 are co-expressed with Bcl6 in Tfh cells following acute murine lymphocytic choriomeningitis virus infection, albeit with temporal decline in T-bet expression as the GC response evolved. T-bet was important for Tfh cell production of IFN-g, but not IL-21, and for the generation of a robust germinal center reaction. STAT4, phosphorylated in Tfh cells upon infection, was required for their expression of T-bet and Bcl6, and that of IFN-g and IL-21. These data indicate that T-bet is concomitantly expressed with Bcl6 in Tfh cells and is required alongside STAT4 phosphorylation to coordinate Tfh cell IL-21 and IFN-g production, and for promotion of the GC response following acute viral challenge.

2017-11-22 | GSE105807 | GEO

STAT4 and T-bet control follicular helper T cells development in viral infections [RNA-seq]

2017-11-22 | GSE105806 | GEO

Regulating type 1 IFN effects in CD8 T cells during viral infections: changing STAT4 and STAT1 expression for function

Project description:Type 1 IFNs can conditionally activate all of the signal transducers and activators of transcription molecules (STATs), including STAT4. The best-characterized signaling pathways use STAT1, however, and type 1 IFN inhibition of cell proliferation is STAT1 dependent. We report that type 1 IFNs can basally stimulate STAT1- and STAT4- dependent effects in CD8 T cells, but that CD8 T cells responding to infections of mice with lymphocytic choriomenigitis virus have elevated STAT4 and lower STAT1 expression with significant consequences for modifying the effects of type 1 IFN exposure. The phenotype was associated with preferential type 1 IFN activation of STAT4 as compared to STAT1. Stimulation through the TCR induced elevated STAT4 expression, and STAT4 was required for peak expansion of antigen-specific CD8 T cells, low STAT1 levels, and resistance to type 1 IFN-mediated inhibition of proliferation. Thus, a mechanism is discovered for regulating the consequences of type 1 IFN exposure in CD8 T cells, with STAT4 acting as a key molecule in driving optimal antigen-specific responses and overcoming STAT1-dependent inhibition of proliferation. CD8 T cells were purified from uninfected WT, STAT1-deficient and STAT4-deficient mice or from D8 LCMV-infected WT mice and either control treated or treated with 1x104 U mouse IFNalpha for 90 minutes.

2012-09-07 | E-GEOD-40666 | biostudies-arrayexpress

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