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Transcriptomic signatures of individual cell types in cerebral cavernous malformation

ABSTRACT: Transcriptomic signatures of individual cell types in cerebral cavernous malformation

PROVIDER: PRJNA975470 | ENA |

REPOSITORIES: ENA

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Transcriptomic signatures of individual cell types in cerebral cavernous malformation

Project description:Cerebral cavernous malformation (CCM) is a hemorrhagic neurovascular disease with no currently available therapeutics. Prior evidence suggests that different cell types may play a role in CCM pathogenesis. The contribution of each cell type to the dysfunctional cellular crosstalk remains unclear. Herein, RNA-seq was performed on FACS sorted endothelial cells (ECs), pericytes, neuroglia and microglia from CCM lesions and non-lesional brain tissue controls. Differentially Expressed Gene (DEG), pathway and Ligand-Receptor (LR) analyses were performed to characterize the dysfunctional genes of respective cell types within CCMs. Common DEGs among all three cell types were related to inflammation and endothelial-to-mesenchymal transition (EndMT). DEG and pathway analyses supported a role of lesional ECs in dysregulated angiogenesis and increased permeability. In addition, VEGFA was particularly upregulated in pericytes. Further pathway and LR analyses identified VEGFA/VEGFR2 signaling in lesional ECs and pericytes that would result in increased angiogenesis. Moreover, lesional pericytes and neuroglia predominantly showed DEGs and pathways mediating the immune response. Further analyses of cell specific gene alterations in CCM endorsed potential contribution to EndMT, coagulation, and a hypoxic microenvironment. Taken together, these findings motivate mechanistic hypotheses regarding non-endothelial contributions to lesion pathobiology and may lead to novel therapeutic targets.

2023-12-30 | GSE233210 | GEO

Inflammation and neutrophil extracellular traps in cerebral cavernous malformation

Project description:Cerebral Cavernous Malformation (CCM) is a brain vascular disease with various neurological symptoms. In this study, we describe the inflammatory profile in CCM and show for the first time the formation of neutrophil extracellular traps (NETs) in rodents and humans with CCM. Through RNA-seq analysis of cerebellum endothelial cells from wild-type mice and mice with anendothelial cell-specific ablation of the Ccm3 gene (Ccm3iECKO), we show that endothelial cells from Ccm3iECKO mice have anincreased expression of inflammation-related genes.

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Project description:Cerebral cavernous malformations are vascular anomalies that can cause hemorrhagic stroke. Mutations in genes encoding Krit 1 (CCM1), OSM (CCM2), and PDCD10 (CCM3) proteins cause CCM. A loss in teh expression of any of these CCM proteins disrupts normal cerebral vessel development by disrupting the cytoskeleton and thereby inhibits endothelial tube ofrmation. Examination of cellular changes based on the loss of CCM gene expression may lead to the methods for early detection and prevention of CCM associated hemorrhagic stroke.

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Inflammation and neutrophil extracellular traps in cerebral cavernous malformation

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Comprehensive Transcriptome Analysis of Cerebral Cavernous Malformation Across Multiple Species and Genotypes

Project description:Comprehensive Transcriptome Analysis of Cerebral Cavernous Malformation Across Multiple Species and Genotypes

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Transcriptomic signatures of individual cell types in cerebral cavernous malformation.

Project description:Cerebral cavernous malformation (CCM) is a hemorrhagic neurovascular disease with no currently available therapeutics. Prior evidence suggests that different cell types may play a role in CCM pathogenesis. The contribution of each cell type to the dysfunctional cellular crosstalk remains unclear. Herein, RNA-seq was performed on fluorescence-activated cell sorted endothelial cells (ECs), pericytes, and neuroglia from CCM lesions and non-lesional brain tissue controls. Differentially Expressed Gene (DEG), pathway and Ligand-Receptor (LR) analyses were performed to characterize the dysfunctional genes of respective cell types within CCMs. Common DEGs among all three cell types were related to inflammation and endothelial-to-mesenchymal transition (EndMT). DEG and pathway analyses supported a role of lesional ECs in dysregulated angiogenesis and increased permeability. VEGFA was particularly upregulated in pericytes. Further pathway and LR analyses identified vascular endothelial growth factor A/ vascular endothelial growth factor receptor 2 signaling in lesional ECs and pericytes that would result in increased angiogenesis. Moreover, lesional pericytes and neuroglia predominantly showed DEGs and pathways mediating the immune response. Further analyses of cell specific gene alterations in CCM endorsed potential contribution to EndMT, coagulation, and a hypoxic microenvironment. Taken together, these findings motivate mechanistic hypotheses regarding non-endothelial contributions to lesion pathobiology and may lead to novel therapeutic targets. Video Abstract.

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Comprehensive Transcriptome Analysis of Cerebral Cavernous Malformation Across Multiple Species and Genotypes

Project description:Purpose: To determine important genes, functions, and networks contributing to the pathobiology of cerebral cavernous malformation (CCM) from transcriptomic analyses across 3 species and 2 disease genotypes. Methods: Sequencing of RNA from laser microdissected neurovascular units (NVUs) of 5 human surgically resected CCM lesions, mouse brain microvascular ECs (BMECs) and C. elegans with induced Ccm gene loss, and their respective controls, provided differentially expressed genes (DEGs). DEGs from mouse and C. elegans were annotated into human homologous genes. Cross-comparisons of DEGs between species and genotypes as well as network and Gene Ontology (GO) enrichment analyses were performed. Results: Among hundreds of DEGs identified in each model, common genes and one GO term (GO:0051656 establishment of organelle localization) were commonly identified across the different species and genotypes. In addition, 24 GO functions were present in 4 out of 5 models and were related to cell-cell adhesion, neutrophil mediated immunity, ion transmembrane transporter activity, and responses to oxidative stress. We provide a comprehensive transcriptome library of CCM disease across species, and for the first time in Ccm1/Krit1 versus Ccm3/Pdcd10 genotypes Conclusion: We provide examples of how results can be used in hypothesis generation or mechanistic confirmatory studies.

2018-12-18 | GSE123968 | GEO

Bulk RNA-seq analysis of HUVEC cell cultures with Cerebral Cavernous Malformation (CCM) protein knockdown

Project description:Bulk RNA-seq analysis of HUVEC cell cultures with Cerebral Cavernous Malformation (CCM) protein knockdown

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