Tumor rejection in Cblb-/- mice depends on IL-9 and Th9 cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA725425 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14332424_1.fastq.gz | Fastqsanger.gz | |||
| SRR14332424_2.fastq.gz | Fastqsanger.gz | |||
| SRR14332425_1.fastq.gz | Fastqsanger.gz | |||
| SRR14332425_2.fastq.gz | Fastqsanger.gz | |||
| SRR14332426_1.fastq.gz | Fastqsanger.gz |
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Project description:Casitas B lymphoma-b (Cbl-b) is a central negative regulator of cytotoxic T and NK cells, explaining its intracellular checkpoint function in cancer. Increasing evidence highlights the importance of CD4+ T helper cell populations (e.g., IL-9 producing T cells: Th9 cells) for anti-cancer immunity. We here provide experimental evidence that Cbl-b acts as rheostat favoring regulatory T cells (Treg) at the expense of Th9 cell differentiation. Adoptively transferred tumor-model antigen specific Cblb-/- Th9 cells exert superior anti-tumor activity leading to improved melanoma control in vivo. Accordingly, blocking IL-9 in melanoma cell-exposed Cblb-/- mice reverses their tumor rejection phenotype. Single cell RNA sequencing of in vitro differentiated Th9 cells from naïve T cells isolated from WT and Cblb-/- animals revealed the transcriptomic basis for increased Th9 cells differentiation. In summary, we here first establish IL-9 and Th9 cells as key anti-tumor executers in Cblb-/- animals. This knowledge may be helpful for future improvement of adoptive T cell therapies in cancer.
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Project description:We found that IL-7 pretreatment enhanced Th9 differentiation. To clarify the underlying mechanisms, we examine the gene expression profiles of CD4+ T cell and Th9 cells with or without IL-7 pretreatment. In Th9 cells, we found that Th9 related genes were greatly increased in IL-7 Th9 group, which demonstrated an enhanced Th9 differentiation. In CD4+ T cells, we found that IL-7 treatment resulted in a global gene expression change especially on chromatin remodeling related genes, which facilitated the entry of transcriptional factor to the Il9 promoter region and promoted Il9 transcription.
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Project description:Interleukin 9 (IL-9) is a γc-family cytokine that is highly produced by T-helper 9 (Th9) cells and regulates a range of immune responses, including allergic inflammation. Here we show that IL-2–JAK3–STAT5 signaling is required for Th9 differentiation, with critical STAT5 binding sites in the Il9 (the gene encoding IL-9) promoter. IL-2 also inhibited B cell lymphoma 6 (BCL6) expression, and over- expression of BCL6 impaired Th9 differentiation. In contrast to IL-2, IL-21 induced BCL6 and diminished IL-9 expression in wild-type but not Bcl6−/− cells, whereas Th9 differentiation was increased in Il21−/− or Il21r−/− T cells. Interestingly, BCL6 bound in proximity to many STAT5 and STAT6 binding sites, including at the Il9 promoter. Moreover, there was increased BCL6 and decreased STAT binding at this site in cells treated with blocking antibodies to IL-2 and the IL-2 receptor, suggesting a possible BCL6–STAT5 binding competition that influences IL-9 production. BCL6 binding was also increased when cells were Th9-differentiated in the presence of IL-21. Thus, our data reveal not only direct IL-2 effects via STAT5 at the Il9 gene, but also opposing actions of IL-2 and IL-21 on BCL6 expression, with increased BCL6 expression inhibiting IL-9 production. These data suggest a model in which increasing BCL6 expression decreases efficient Th9 differentiation, indicating possible distinctive approaches for controlling this process. Genome-wide transcription factors mapping and binding of STAT5B and STAT6 in mouse polarized Th9 cells treated with or without blocking antibodies to IL-2 (anti-IL-2). RNA-Seq is conducted in WT and Il2-/- mice.
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Project description:Interleukin 9 (IL-9) is a γc-family cytokine that is highly produced by T-helper 9 (Th9) cells and regulates a range of immune responses, including allergic inflammation. Here we show that IL-2–JAK3–STAT5 signaling is required for Th9 differentiation, with critical STAT5 binding sites in the Il9 (the gene encoding IL-9) promoter. IL-2 also inhibited B cell lymphoma 6 (BCL6) expression, and over- expression of BCL6 impaired Th9 differentiation. In contrast to IL-2, IL-21 induced BCL6 and diminished IL-9 expression in wild-type but not Bcl6−/− cells, whereas Th9 differentiation was increased in Il21−/− or Il21r−/− T cells. Interestingly, BCL6 bound in proximity to many STAT5 and STAT6 binding sites, including at the Il9 promoter. Moreover, there was increased BCL6 and decreased STAT binding at this site in cells treated with blocking antibodies to IL-2 and the IL-2 receptor, suggesting a possible BCL6–STAT5 binding competition that influences IL-9 production. BCL6 binding was also increased when cells were Th9-differentiated in the presence of IL-21. Thus, our data reveal not only direct IL-2 effects via STAT5 at the Il9 gene, but also opposing actions of IL-2 and IL-21 on BCL6 expression, with increased BCL6 expression inhibiting IL-9 production. These data suggest a model in which increasing BCL6 expression decreases efficient Th9 differentiation, indicating possible distinctive approaches for controlling this process.
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Project description:We report that the Th9 differenciation program is boosted in presence of Il-1beta
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Project description:Dual-specificity phosphatase 8 is a MAPK phosphatase that dephosphorylates and inactivates the kinase JNK. DUSP8 is highly expressed in T cells; however, the in vivo role of DUSP8 in T cells remains unclear. Using T-cell-specific DUSP8 conditional knockout (T-DUSP8 cKO) mice, mass spectrometry analysis, chromatin-immunoprecipitation sequencing, and immune analysis, we found that DUSP8 interacted with Pur-α, stimulated interleukin-9 (IL-9) gene expression, and promoted Th9 differentiation. Mechanistically, DUSP8 dephosphorylated the transcriptional repressor Pur-α upon TGF-β signaling, leading to the nuclear export of Pur-α and subsequent IL-9 transcriptional activation. Furthermore, IL-9 mRNA levels were induced in Pur-α-deficient T cells. In addition, T-DUSP8 cKO mice displayed reduction of IL-9 and Th9-mediated immune responses in the allergic asthma model. Reduction of IL-9 mRNA levels in T cells and allergic responses of T-DUSP8 cKO mice was reversed by Pur-α knockout. Remarkably, DUSP8 protein levels and the DUSP8–Pur-α interaction were indeed increased in the cytoplasm of T cells from human asthma patients and atopic dermatitis patients. Collectively, DUSP8 induces TGF-β-stimulated IL-9 transcription and Th9-induced allergic responses by inhibiting the nuclear translocation of the transcriptional repressor Pur-α. DUSP8 may be a T-cell biomarker and therapeutic target for asthma and atopic dermatitis.
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