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STAT3 regulates CD8+ T cell differentiation and functions in cancer [ChIP-seq]

ABSTRACT: STAT3 regulates CD8+ T cell differentiation and functions in cancer [ChIP-seq]

PROVIDER: PRJNA898637 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22200010.fastq.gz	Fastqsanger.gz
	SRR22200011.fastq.gz	Fastqsanger.gz
	SRR22200012.fastq.gz	Fastqsanger.gz
	SRR22200013.fastq.gz	Fastqsanger.gz
	SRR22200014.fastq.gz	Fastqsanger.gz

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STAT3 regulates CD8+ T cell differentiation and functions in cancer

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STAT3 regulates CD8+ T cell differentiation and functions in cancer [RNA-seq]

Project description:In cancer, persistent antigens drive CD8+ T cell differentiation into exhausted progenitor (Texprog) and terminally exhausted (Texterm) cells. However, how the extrinsic and intrinsic regulatory mechanisms cooperate during this process still remain not well understood. Here, we found STAT3 signaling plays essential roles in promoting intra-tumor Texterm cell development, by enhancing their effector functions and survival, which results in better tumor control. In tumor microenvironments, STAT3 is predominantly activated by IL-10 and IL-21, but not IL-6. Besides, STAT3 also plays critical roles in the development and function of terminally differentiated effector CD8+ T cells in acute infection. Mechanistically, STAT3 transcriptionally promotes the expression of effector function-related genes, while suppresses those expressed by progenitor Tex subset. Moreover, STAT3 functions in collaboration with BATF and IRF4 to mediate chromatin activation at effector gene loci. Thus, we have elucidated the roles of STAT3 signaling in terminally differentiated CD8+ T cell development, especially in cancer, which benefits developing more effective immunotherapies against tumor.

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STAT3 regulates CD8+ T cell differentiation and functions in cancer [ChIP-seq]

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STAT3 regulates CD8+ T cell differentiation and functions in cancer [ATAC-seq]

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The Stat3 target Mettl8 regulates mouse ESCs differentiation via inhibiting JNK pathway

Project description:The capacity of embryonic stem cells to differentiate into all lineages of mature organism is precisely regulated by cellular signaling factors. STAT3 is a crucial transcription factor that plays a central role in maintaining embryonic stem cells identity. However the underlying mechanism how Stat3 directs differentiation is still not completely understood. Here we show that Stat3 positively regulates gene expression of methyltransferase like protein 8 (Mettl8) in mouse ES cells. We found that Mettl8 is dispensable for pluripotency but affects ESCs differentiation. Subsequently we discovered that Mettl8 interacts with Mapkbp1’s mRNA, which is an intermediate factor in JNK signaling, and inhibits the translation of the mRNA. Thereby, Mettl8 prohibits the activation of JNK signaling and enhances the differentiation of mouse ESCs. Collectively, our study uncovers a Stat3 target Mettl8 which regulates mouse ESCs differentiation via JNK signaling.

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Gene expression profiling of WT and STAT3-/- Tc17 CD8+ T cells

Project description:CD8+ T cells are pre-programmed for cytotoxic differentiation. However, a subset of effector CD8+ T cells (‘Tc17’) produce IL-17 and fail to express cytotoxic genes. Here, we show that the transcription factors directing IL-17 production inhibit cytotoxicity despite persistent Runx3 expression. Cytotoxic gene repression did not require the transcription factor Thpok. We further show that STAT3 restrained cytotoxic gene expression in CD8+ T cells and that RORgt represses cytotoxic genes by inhibiting the functions but not the expression of the ‘cytotoxic’ transcription factors T-bet and Eomesodermin. Thus, the transcriptional circuitry directing IL-17 expression inhibits cytotoxic functions.

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STAT3 regulates CD8+ T cell differentiation and functions in cancer and acute infection.

Project description:In cancer, persistent antigens drive CD8+ T cell differentiation into exhausted progenitor (Texprog) and terminally exhausted (Texterm) cells. However, how the extrinsic and intrinsic regulatory mechanisms cooperate during this process still remains not well understood. Here, we found that STAT3 signaling plays essential roles in promoting intratumor Texterm cell development by enhancing their effector functions and survival, which results in better tumor control. In tumor microenvironments, STAT3 is predominantly activated by IL-10 and IL-21, but not IL-6. Besides, STAT3 also plays critical roles in the development and function of terminally differentiated effector CD8+ T cells in acute infection. Mechanistically, STAT3 transcriptionally promotes the expression of effector function-related genes, while it suppresses those expressed by the progenitor Tex subset. Moreover, STAT3 functions in collaboration with BATF and IRF4 to mediate chromatin activation at the effector gene loci. Thus, we have elucidated the roles of STAT3 signaling in terminally differentiated CD8+ T cell development, especially in cancer, which benefits the development of more effective immunotherapies against tumors.

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