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CCN2 regulates smooth muscle cell trans-differentiation and lipid accumulation in atherosclerosis

ABSTRACT: CCN2 regulates smooth muscle cell trans-differentiation and lipid accumulation in atherosclerosis

PROVIDER: PRJNA1165825 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR30813788_1.fastq.gz	Fastqsanger.gz
	SRR30813788_2.fastq.gz	Fastqsanger.gz
	SRR30813789_1.fastq.gz	Fastqsanger.gz
	SRR30813789_2.fastq.gz	Fastqsanger.gz

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CCN2 regulates smooth muscle cell trans-differentiation and lipid accumulation in atherosclerosis

Project description:Accruing evidence illustrates an emerging paradigm of dynamic vascular smooth muscle cell (SMC) trans-differentiation during atherosclerosis progression. However, the molecular regulators that govern SMC phenotype diversification remain poorly defined. This study aims to elucidate the functional role and underlying mechanisms of cellular communication network factor 2 (CCN2), a matricellular protein, in regulating SMC plasticity in the context of atherosclerosis.

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CCN2 deficiency in smooth muscle cells triggers cell reprogramming and aggravates aneurysm development

Project description:Vascular smooth muscle cell (VSMC) phenotypic switching is widely recognized as a key mechanism responsible for the pathogenesis of several aortic diseases such as aortic aneurysm. Cellular communication network factor 2 (CCN2), often upregulated in human pathologies and animal disease models, exerts a myriad of context-dependent biological functions. However, current understanding of the role of SMC-CCN2 in SMC phenotypic switching and its function in the pathology of abdominal aortic aneurysm (AAA) is lacking. Here we report the effect of SMC-restricted CCN2 deficiency of hypercholesterolemic mice on gene expression in infrarenal aorta with or without angiotensin II (Ang II)-infusion.

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Project description:Antiphospholipid syndrome (APS)-associated vasculopathy is heralded by abnormal proliferation of endothelial and smooth muscle cells, leading to small blood vessel occlusion in the skin, kidneys, and heart, amongst other organs. The underlying mechanisms remain unclear, and targeted treatment options for patients with APS are lacking. To identify and analyze APS microvascular endothelial cells (MVECs), skin biopsies of patients with APS complicated by livedo racemosa were characterized using single-cell RNA sequencing (scRNA-seq). Increased expression of CCN1 and CCN2 were discovered and further confirmed in APS skin by microscopy, and in APS plasma by ELISA. Exposure of healthy MVECs to patient IgG triggered CCN1 and CCN2 upregulation via yes-associated protein (YAP1)-mediated signaling. CCN2 originating from APS IgG-stimulated MVECs led to the proliferation and migration of vascular smooth muscle cells, which were blocked by the anti-CCN2 antibody, pamrevlumab. We further observed increased expression of CCN1 and CCN2, along with evidence of YAP1 nuclear translocation, in kidney vessels of APS nephropathy biopsies. Finally, CCN2 inhibition with pamrevlumab significantly reduced neointima thickening and cell proliferation in a mouse model of APS IgG-accelerated neointima formation. Together, this study revealed activation of YAP1-mediated signaling in APS dermal microvessels and demonstrated that the YAP1 target CCN2 plays a role in facilitating pro-proliferative communication between MVECs and VSMCs. These findings offer insights into the cellular and molecular mechanisms underlying APS vasculopathy and provide potential therapeutic targets for patients.

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CCN2 deficiency in smooth muscle cells triggers cell reprogramming and aggravates aneurysm development

Project description:CCN2 deficiency in smooth muscle cells triggers cell reprogramming and aggravates aneurysm development

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