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Effect of VEGF-C treatment on sorted meningeal CD45+ cells

ABSTRACT: Effect of VEGF-C treatment on sorted meningeal CD45+ cells

PROVIDER: PRJNA1057768 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27362658_1.fastq.gz	Fastqsanger.gz
	SRR27362658_2.fastq.gz	Fastqsanger.gz
	SRR27362659_1.fastq.gz	Fastqsanger.gz
	SRR27362659_2.fastq.gz	Fastqsanger.gz
	SRR27362660_1.fastq.gz	Fastqsanger.gz

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Effect of VEGF-C treatment on sorted meningeal CD45+ cells

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Effect of VEGF-C treatment on sorted meningeal lymphatic endothelial cells

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Project description:Meningeal lymphatic vessels (MLVs) promote tissue clearance and immune surveillance in the central nervous system (CNS). Vascular endothelial growth factor-C (VEGF-C) regulates MLV development and maintenance and has therapeutic potential for treating neurological disorders. Herein, we investigated the effects of VEGF-C overexpression on brain fluid drainage and ischemic stroke outcomes in mice. Intra-cerebrospinal administration of an adeno-associated virus expressing mouse full-length VEGF-C (AAV-mVEGF-C) increased CSF drainage to the deep cervical lymph nodes (dCLNs) by enhancing lymphatic growth, and upregulated neuroprotective signaling pathways identified by single nuclei RNA sequencing of brain cells. In a mouse model of ischemic stroke, AAV-mVEGF-C pretreatment reduced stroke injury and ameliorated motor performances in the subacute stage, associated with mitigated microglia-mediated inflammation and increased BDNF signaling in brain cells. Neuroprotective effects of VEGF-C were lost upon ligation of the dCLN afferent lymphatics, and not mimicked by acute post-stroke VEGF-C injection. We conclude that VEGF-C prophylaxis promotes multiple vascular, immune, and neural responses that culminate in a protection against neurological damage in acute ischemic stroke.

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Meningeal lymphatic vasculature mediates cervical lymph node metastasis of brain tumors through VEGF-C/VEGFR3/eNOS signaling pathway

Project description:Purpose: The rediscovery of meningeal lymphatic vessels (MLVs) suggests a potential linkage between brain tumors and cervical lymph nodes (LNs). In this study, we investigated whether and how meningeal lymphatics regulate the metastasis of brain tumor cells. Experimental Design: We first examined the pattern of MLVs and LNs after tumor cells were injected into the cisterna magna (i.c.m.) or subdural space of mice. The meninges were isolated and analyzed by whole-mount immunofluorescence staining. LN metastasis was analyzed by detecting GFP+ tumor cells. Then we used inducible knock-out mice and AAV-VEGF-C delivery system to study the function of MLVs in mediating the metastasis of brain tumor cells. Finally, RNA-seq was used to determine the expression profiles of meningeal lymphatic endothelial cells (mLECs) in mice with or without tumors. The roles of the endothelial nitric oxide synthetase (eNOS) were evaluated both genetically and pharmacologically in vivo. Results: Meningeal lymphangiogenesis induced by GL261 and B16 tumors was correlated with dCLN swelling and metastasis. dCLN metastasis was suppressed in MLV-defective mice, while promoted in AAV-VEGF-C-treated mice. In addition, we found that VEGF-C/VEGFR3 signaling regulated both meningeal and tumor lymphangiogenesis. Tumor-associated mLECs have a distinct transcriptomic signature, which highly express eNOS. Furthermore, genetic or pharmacological inhibition of eNOS significantly suppressed meningeal lymphangiogenesis and dCLN metastasis. Conclusions: The meningeal lymphatic vasculature mediates the metastasis of brain tumors to cervical LNs, mainly through a VEGF-C/VEGFR3-eNOS signaling pathway, suggesting that MLV may be a potential therapeutic target for the extracranial metastasis of brain tumors.

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Sca1-CD45 sorted bone marrow

Project description:Sca1-CD45 sorted bone marrow Keywords: other

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Effect of VEGF-C treatment on sorted brain microglia/macrophages

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