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Erythropoietin receptor on cDC1s dictates immune tolerance

ABSTRACT: Erythropoietin receptor on cDC1s dictates immune tolerance

PROVIDER: PRJNA1063723 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27500443_1.fastq.gz	Fastqsanger.gz
	SRR27500443_2.fastq.gz	Fastqsanger.gz
	SRR27500444_1.fastq.gz	Fastqsanger.gz
	SRR27500444_2.fastq.gz	Fastqsanger.gz
	SRR27500445_1.fastq.gz	Fastqsanger.gz

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Erythropoietin receptor on cDC1s dictates immune tolerance

Project description:Immune tolerance is an active state of unresponsiveness of the immune system to antigens (Ags) that have the potential to induce an immune response1. Such tolerance is beneficial in avoiding autoimmunity and rejection of organ transplants, but detrimental in cancer2. Type 1 conventional dendritic cells (cDC1s) are unique in their efferocytosis3 and cross-presenting abilities4, resulting in T cell-mediated immunity5 or tolerance6-10. However, the mechanisms underlying the tolerogenic function of cDC1s remain largely unknown. Here, we show that the erythropoietin receptor (EpoR) acts as a critical switch that determines the tolerogenic state of cDC1s and the threshold of Ag-specific T cell responses. In total lymphoid irradiation-induced allograft tolerance11,12, EpoR+ cDC1s induce donor-specific CD4+FoxP3+ regulatory T cells (Tregs), and conditional knockout of EpoR in cDC1s abrogates Ag-specific Treg induction, resulting in allograft rejection. In the steady state, EpoR+ migratory cDC1s control Ag-specific Treg induction in peripheral lymph nodes (LNs). In cancer, EpoR is expressed on both tumor Ag-carrying, tumor-infiltrating cDC1s, as well as migratory cDC1s in tumor-draining LNs (tdLNs). Loss of EpoR from cDC1s leads to tumor reduction by enhancing tumor Ag-specific CD8+ T cell priming and generating more precursor exhausted T cells13 in tdLNs, preserving CD8+ T cell precursor-like features and effector function, and reducing Tregs in the tumor. Thus, targeting EpoR on cDC1s to induce or inhibit immune tolerance should enable new ways to treat a variety of diseases.

2024-03-01 | GSE253056 | GEO

Expression data from WT cDC1s, Zeb2 KO cDC1s, Nfil3 Zeb2 DKO cDC1s and Zeb2 Id2 DKO cDC1s

Project description:We used microarrays to determine whether cDC1s from the two double KO are bona fide cDC1s, and what are the transcriptional changes within these cDC1s.

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Truncating erythropoietin receptor rearrangements in acute lymphoblastic leukemia

Project description:Chromosomal rearrangements are a hallmark of acute lymphoblastic leukemia (ALL) and are important ALL initiating events. We describe four different rearrangements of the erythropoietin receptor gene EPOR in Philadelphia chromosome-like (Ph-like) ALL. All of these rearrangements result in truncation of the cytoplasmic tail of EPOR at residues similar to those mutated in primary familial congenital polycythemia, with preservation of the proximal tyrosine essential for receptor activation and loss of distal regulatory residues. This resulted in deregulated EPOR expression, hypersensitivity to erythropoietin stimulation, and heightened JAK-STAT activation. Expression of truncated EPOR in mouse B cell progenitors induced ALL in vivo. Human leukemic cells with EPOR rearrangements were sensitive to JAK-STAT inhibition, suggesting a therapeutic option in high-risk ALL.

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Comparison between CD103+ cDC1s from IL-33-treated Flt3L-BMDCs and GM-CSF-treated Flt3L-BMDCs

Project description:To assess genotypic differences between IL-33-induced CD103+ cDC1s and GM-CSF-induced CD103+ cDC1s IL-33 or GM-CSF was treated at 5 ng/ml on the day 5 of Flt3L-BMDC generation and then the cells were incubated for an additional 5 days Then, we performed RNA sequencing of CD103+ cDC1s isolated from IL-33 or GM-CSF-treated Flt3L-BMDCs

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Prostate cancer androgen receptor activity dictates efficacy of bipolar androgen therapy through MYC

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