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GPR183 mediates the capacity of the novel CD47-CD19 bispecific antibody TG-1801 to heighten ublituximab-umbralisib (U2) anti-lymphoma activity

ABSTRACT: GPR183 mediates the capacity of the novel CD47-CD19 bispecific antibody TG-1801 to heighten ublituximab-umbralisib (U2) anti-lymphoma activity

PROVIDER: PRJNA819974 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18482600_1.fastq.gz	Fastqsanger.gz
	SRR18482600_2.fastq.gz	Fastqsanger.gz
	SRR18482601_1.fastq.gz	Fastqsanger.gz
	SRR18482601_2.fastq.gz	Fastqsanger.gz
	SRR18482578_1.fastq.gz	Fastqsanger.gz

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Project description:Intercellular communication is critical for integrating complex signals in multicellular eukaryotes. Vascular endothelial cells and T lymphocytes closely interact during the recirculation and trans-endothelial migration of T cells. In addition to direct cell-cell contact, we show that T cell derived extracellular vesicles can interact with endothelial cells and modulate their cellular functions. Thrombospondin-1 and its receptor CD47 are expressed on exosomes/ectosomes derived from T cells, and these extracellular vesicles are internalized and modulate signaling in both T cells and endothelial cells. Extracellular vesicles released from cells expressing or lacking CD47 differentially regulate activation of T cells induced by engaging the T cell receptor. Similarly, T cell-derived extracellular vesicles modulate endothelial cell responses to vascular endothelial growth factor and tube formation in a CD47-dependent manner. Uptake of T cell derived extracellular vesicles by recipient endothelial cells globally alters gene expression in a CD47-dependent manner. CD47 also regulates the mRNA content of extracellular vesicles in a manner consistent with some of the resulting alterations in target endothelial cell gene expression. Therefore, the thrombospondin-1 receptor CD47 directly or indirectly regulates intercellular communication mediated by the transfer of extracellular vesicles between vascular cells. Treatment with B6H12 antibody inhibited co-immunoprecipitation of EGFR with CD47 and inhibited EGF-induced EGFR tyrosine phosphorylation. B6H12 treatment of bCSC also suppressed asymmetric cell division and cell proliferation and up-regulated caspase 3/7 activity. Correspondingly, caspase-7 cleavage in human breast cancers correlated with CD47 expression. Our data shows that B6H12 specifically targets bCSCs but not differentiated cancer cells, and this CD47 signaling is independent of SIRPÎ±. Three replicates of each condition were generated. Three replicates of each MDA-231 attached cells (differentiated), MDA-231 in suspension cells (bCSC), MDA-231 in suspension cells (bCSC) treated with Control Antibody and MDA-231 in suspension cells (bCSC) treated with B6H12 Antibody.

Dataset Information

GPR183 mediates the capacity of the novel CD47-CD19 bispecific antibody TG-1801 to heighten ublituximab-umbralisib (U2) anti-lymphoma activity

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