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Tyrosine phosphorylation of both STAT5A and STAT5B is necessary for maximal IL-2 signaling and its mitogenic action

ABSTRACT: Tyrosine phosphorylation of both STAT5A and STAT5B is necessary for maximal IL-2 signaling and its mitogenic action

PROVIDER: PRJNA1037130 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26728900.fastq.gz	Fastqsanger.gz
	SRR26728901.fastq.gz	Fastqsanger.gz
	SRR26728902.fastq.gz	Fastqsanger.gz
	SRR26728903.fastq.gz	Fastqsanger.gz
	SRR26728904.fastq.gz	Fastqsanger.gz

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Tyrosine phosphorylation of both STAT5A and STAT5B is necessary for maximal IL-2 signaling and its mitogenic action

Project description:STAT5 proteins are vital for lymphocyte development and function. Cytokine activation of STAT5A and STAT5B involves the tyrosine phosphorylation of a C-terminal tyrosine in each protein; however, the importance of STAT5 tyrosine phosphorylation in vivo has not been assessed. Here we generated Stat5a and Stat5b tyrosine mutant knockin mice and found they had greatly reduced CD8+ T-cell numbers. Morever, these cells exhibited profoundly diminished IL-2-induced proliferation, correlating with reduced IL-2- mediated induction of Myc, pRB, a range of cyclins and CDKs, and a G1àS phase- transition block. The mutant CD8+ T cells also exhibited decreased IL-2-mediated activation of pERK and pAKT, which can in part be attributed to diminished IL-2-induced expression of IL-2Rb and IL-2Rg. Our findings demonstrate that tyrosine phosphorylation of both STAT5A and STAT5B is essential for maximal IL-2 signaling, and our transcriptomic and proteomic analyses elucidate the molecular basis for the mitogenic effects of IL-2 on CD8+ T cells.

2024-05-10 | GSE247343 | GEO

Prolactin-inducible Stat5a-mediated and Stat5b-mediated gene profiles

Project description:Stat5a and Stat5b proteins are highly homologous with greater than 90% amino acid identity and share binding to the palindromic Stat5 consensus sequence, TTCNNNGAA, but individual roles of each transcription factor in breast cancer have not been thoroughly evaluated. To determine the degree of similarity between transcripts modulated by Stat5a and Stat5b proteins in human breast cancer, we utilized genome-wide transcript profiling to identify genes regulated specifically by Stat5a or Stat5b in response to prolactin. Stat5a or Stat5b was transiently overexpressed using adenoviral gene delivery in MCF7 breast cancer cells followed 16 hr serum starvation and a brief 4 hr exposure to 10nM human prolactin to identify immediate-early transcripts modulated by each transcription factor. Basal activation of Stat5a or Stat5b was not present in cells not stimulated with prolactin. mRNA from each condition was harvested and validated using the Agilent bioanalyzer. cDNA was generated and genome-wide transcript profiling was performed in triplicate using the Affymetrix HuGene 1.0 ST array.

2012-08-29 | E-GEOD-37781 | biostudies-arrayexpress

Prolactin-inducible Stat5a-mediated and Stat5b-mediated gene profiles

2012-08-29 | GSE37781 | GEO

RNA-seq data from wildtype, STAT5A-knockout and STAT5B-knockout BCR/ABLp185+ transformed mouse bone marrow cell lines

Project description:RNA-Seq of immortalized Stat5a-/-, Stat5b-/-, and wildtype BCR/ABLp185+ cell lines was used to identify STAT5A and STAT5B specific target genes.

2019-10-01 | GSE121246 | GEO

GM-CSF-activated STAT5A but not STAT5B regulates macrophage functions and inflammation in atherosclerosis

Project description:Inhibition of STAT5 was recently reported to reduce mouse atherosclerosis. However, the regulatory role of STAT5 isoforms STAT5A and STAT5B in human disease and more specifically in macrophages remains unknown. Here, we demonstrate reciprocal expression regulation of STAT5A and B in human atherosclerotic lesions. The former was highly upregulated in ruptured over stable plaque and correlated with macrophage presence, a finding that was corroborated by the high chromosomal accessibility of STAT5A but not B gene in plaque macrophages. Phosphorylated STAT5 correlated with macrophages confirming its activation status. As macrophage STAT5 is activated by GM-CSF, we studied the effects of its silencing in GM-CSF differentiated human macrophages. STAT5A knockdown blunted NF-kB pathway, phagocytosis, cholesterol metabolism, and apoptosis terms. These changes at transcriptional level could be confirmed at functional level, with significant increases in apoptosis and phagocytosis and decreases in lipid uptake and IL-6, IL8, and TNFa cytokine secretion after STAT5A knockdown. Finally, inhibition of general and isoform A specific STAT5 inhibitor significantly reduced the secretion of TNFa, IL-8 and IL-10 in ex vivo tissue slices of advanced human atherosclerotic plaques. In summary, we identify STAT5A as important determinant of macrophage functions and inflammation in the context of atherosclerosis and show its promise as therapeutic target for human atherosclerotic plaque inflammation.

2023-10-02 | GSE217893 | GEO

Gene expression profiling of mouse liver with hepatocyte-specific knockout of STAT5a/STAT5b genes (STAT5ab-KO)

Project description:rRNA-depleted RNA isolated from livers of control male and female mice and from male mice with hepatocyte-specific STAT5ab-KO was analyzed by RNA-seq. This study revealed a substantial, albeit incomplete loss of liver sex bias in hepatocyte-specific STAT5a/STAT5b (collectively, STAT5)-deficient mouse liver. Notably, in male liver, many male-biased genes were down regulated in direct association with the loss of STAT5 binding; many female-biased genes, which show low STAT5 binding, were de-repressed, indicating an indirect mechanism for repression by STAT5.

2020-12-01 | GSE103885 | GEO

A STAT5B-CD9 axis determines self-renewal in hematopoietic and leukemic stem cells

Project description:The transcription factors STAT5A and STAT5B are critical in hematopoiesis and leukemia. They are widely believed to have redundant functions but we describe a unique role for STAT5B in driving the self-renewal of hematopoietic and leukemic stem cells (HSCs/LSCs). We find STAT5B to be specifically activated in HSCs and LSCs, where it induces many genes associated with quiescence and self-renewal, including the surface marker CD9. Levels of CD9 represent a prognostic marker for patients with STAT5-driven leukemia and our findings suggest that anti-CD9 antibodies may be useful in their treatment to target and eliminate LSCs. We show that it is vital to consider STAT5A and STAT5B as distinct entities in normal and malignant hematopoiesis.

2021-12-31 | GSE178648 | GEO

Essential role of STAT5 tyrosine phosphorylation in vivo

Project description:STAT5 proteins are vital for lymphocyte development and function. Tyrosine phosphorylation of a C-terminal tyrosine is the key event in cytokine activation of STAT5A and STAT5B. However, the role of STAT5 tyrosine phosphorylation has not been assessed in vivo. Here we generated Stat5a and Stat5b tyrosine mutant knock-in (KI) mice and found that these animals had greatly reduced CD8+ T cell numbers. These cells exhibited profoundly diminished proliferation in response to IL-2, correlating with greatly reduced IL-2-induced pRB and a block in the G1-->S phase transition. The mutant cells also exhibited decreased IL-2-mediated activation of pERK and pAKT, which can in part be attributed to diminished IL-2-induced expression of IL-2R-beta and IL-2R-gamma. Our findings highlight that the tyrosine phosphorylation of both STAT5A and STAT5B is essential for maximal IL-2 signaling and elucidate the molecular basis for achieving an optimal mitogenic effect of IL-2 on CD8+ T cells.

2023-11-06 | MSV000093320 | MassIVE

Essential role of STAT5 tyrosine phosphorylation in vivo

2023-12-23 | MSV000093724 | MassIVE

GM-CSF-activated STAT5A but not STAT5B regulates macrophage functions and inflammation in atherosclerosis

Project description:GM-CSF-activated STAT5A but not STAT5B regulates macrophage functions and inflammation in atherosclerosis

| PRJNA901347 | ENA