Macrophages adopt mural cell function and marker expression for vascular support following ischemia
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE211550 | GEO | 2024/04/08
REPOSITORIES: GEO
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Project description:Macrophages adopt mural cell function and marker expression for vascular support following ischemia
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Project description:Purpose: Pericytes, the mural cells of blood microvessels, have come into focus as regulators of microvascular development and function, but due to paucity of defining markers, the identification and functional characterization of PC remain problematic, and reported data are often controversial. Here, we used a new approach for the isolation of mural cell from mouse brain in combination with RNA-sequencing (RNA-seq) and previously published vascular transcriptome data to assemble a state-of-the-art catalogue of brain mural cell-enriched gene transcripts. Methods: We isolated double positive cells from the brain of Pdgfrb-eGFP/NG2-DsRed transgenic mice using FACS. Cells were lysed, RNA extracted and sequenced with next-generation sequencing (NGS). For comparison, we also determined the transcriptome of brain microvascular fragments (containing both endothelial cells and mural cells) isolated by mechanical tissue disintegration, collagenase digestion and immune-panning using anti-CD31 antibodies coupled to magnetic beads. The reads were aligned to the Ensembl mouse gene assembly (NCBIM37) using Tophat2 software (version 2.0.4). The duplicated reads were removed using the picard tool (version 1.92). To identify the genes significantly enriched in the pericyte samples as compared with microvascular samples, statistical tests were performed using the Cufflinks tool (version 2.2.1) Results: The result showed that mRNA transcripts representing 856 different genes were enriched more than two-fold in FACS isolated Pdgfrb-eGFP/NG2-DsRed double positive cells compared with whole microvascular fragments (False Discovery Rate < 0.05) The RNA from three FACS sorted brain mural cell samples and three whole brain microvascular samples isolated from three animals were processed and sequenced on the Illumina HiSeq 2500 platform in the sequencing facility in Uppsala University.
2016-10-24 | E-GEOD-75668 | biostudies-arrayexpress
Project description:In the study we show that a specific peripheral glial population, derived from boundary cap (BC) cells, constitutes a major source of mural cells for the developing vasculature. Using Cre-based reporter cell tracing and single cell transcriptomics, we show that BC cell derivatives migrate along the nerves and differentiate into pericytes and vascular smooth muscle cells in the skin. The switch from glial to mural molecular identity is initiated while the cells are still associated with nerves To further characterize this transition glial to vascular identity, we performed single cell transcriptomic analyses (scRNA-seq) on FACS-purified traced cells from dissociated E12.5 skin. Tomato-positive cells were isolated by FACS from embryonic skin at E12.5. Around 10,000 cells were loaded into one channel of the Chromium system using the V3 single cell reagent kit (10X Genomics) We analyzed 2527 single cell transcriptomes with a mean number of expressed genes per cell of 4,696. This study highlights the plasticity of BC derivatives and uncovers a novel, nerve-derived origin for skin mural cells.
2023-11-30 | E-MTAB-8972 | biostudies-arrayexpress
Project description:Follicular somatic cells (mural granulosa cells and cumulus cells) and the oocyte communicate through paracrine interactions and through direct gap junctions between oocyte and cumulus cells. Considering that mural and cumulus cells arise through a common developmental pathway and that their differentiation is essential to reproductive success, understanding how these cells differ is a key aspect to understanding their critical functions. Changes in global gene expression before and after an ovulatory stimulus were compared between cumulus and mural granulosa cells to test the hypothesis that mural and cumulus cells are highly differentiated at the time of an ovulatory stimulus and further differentiate during the periovulatory interval. The transcriptomes of the two cell types were markedly different (>1500 genes) before an ovulatory hCG bolus but converged after ovulation to become completely overlapping. The predominant transition was for the cumulus cells to become more like mural cells after hCG. This indicates that the differentiated phenotype of the cumulus cell is not stable and irreversibly established but may rather be an ongoing physiological response to the oocyte. We compared transcriptomes of mural granulosa cells isolated from the follicles before (PM-GC) and after (VVM-GC) an ovulatory stimulus. These data were analyzed with previously published cumulus cells data to compare transitions in granulosa cell state before and after an ovulatory stimulus with transitions in cumulus cells.
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Project description:Dysfunction in human cerebrovasculature contribute to pathogenesis of multiple neurological diseases, and the blood brain barrier (BBB), an organotypic specialization of the cerebrovasculature, impedes the delivery of systemic therapies for nearly all brain disorders.Here we developed a novel methodology to isolate fresh cells from the human cerebrovasculature with high capture efficiency and cell viability, and performed single-cell mRNA sequencing (scRNAseq) for human cerebrovascular cells from 13 surgical resected samples, including normal human brain tissue and gliomas, the most common brain malignancy. We profiled the transcriptome of 103,230 single cells, including 57,324 endothelial cells and 27,703 mural cells.We molecular defined the principle vascular cell types in the BBB, and uncovered molecular underpinning of heterogeneity in endothelial cells, mural cells and perivascular fibroblasts along the arteriovenous axis.
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Project description:The granulosa cells in the mammalian ovarian follicle respond to gonadotropin signalling and are involved in the processes of folliculogenesis and oocyte maturation. Studies on gene expression and regulation in human granulosa cells are of interest due to their potential for estimating the oocyte viability and IVF success. However, the post-transcriptional gene expression studies on miRNA level in the human ovary have been scarce. The current study determined the miRNA profile by deep sequencing of the two intrafollicular somatic cell types: mural and cumulus granulosa cells isolated from women undergoing controlled ovarian stimulation and in vitro fertilization. Paired cumulus and mural granulosa samples were analysed from 3 women participating in IVF procedure. Libraries of all 6 samples were sequenced twice, generating 2 technical replicates for each sample. Differential gene expression study was performed on the pooled results of technical replicates.
2013-08-05 | E-GEOD-46489 | biostudies-arrayexpress