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Role of G-protein couple receptor 55 (GPR55) in B cells

ABSTRACT: Role of G-protein couple receptor 55 (GPR55) in B cells

PROVIDER: PRJNA870973 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21132530_1.fastq.gz	Fastqsanger.gz
	SRR21132530_2.fastq.gz	Fastqsanger.gz

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Role of G-protein couple receptor 55 (GPR55) in B cells

Project description:Identifying novel pathways regulating the adaptive immune response in chronic inflammatory diseases such as atherosclerosis is of particular interest in view of developing new therapeutic drugs. Here we report that the lipid receptor GPR55 is highly expressed by splenic B cells and inversely correlates with atheroma plaque size in mice. In human carotid endarterectomy specimen, GPR55 transcript levels were significantly lower in unstable compared to stable carotid plaques. To study the impact of GPR55 deficiency in atherosclerosis, we crossed Gpr55 knockout mice with apolipoprotein E (ApoE) knockout mice and subjected the mice to Western diet for 4 to 16 weeks. Compared to ApoE-/- controls, ApoE-/-Gpr55-/- mice developed larger plaques with increased necrotic core size, associated with elevated circulating and aortic leukocyte counts. Flow cytometry, immunofluorescence and RNA-sequencing analysis of splenic B cells in these mice revealed a hyperactivated B cell phenotype with disturbed plasma cell maturation and immunoglobulin (Ig)G antibody overproduction. Collectively, these discoveries provide new evidence for GPR55 as key modulator of the adaptive immune response in atherosclerosis. Targeting GPR55 could be useful to limit inflammation and plaque progression in patients suffering from atherosclerosis We performed gene expression profiling analysis using data obtained from RNA-seq of female splenic CD19+ B cells isolated from 6 different ApoE-knockout mice and 6 ApoE and Gpr55 double knockout mice, all under C57BL/6J background.

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The effect of Sulfonulyrea short form (SUR2A-55) overexpression on cardiac gene expression

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