Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Perivascular macrophages proliferate in the CNS, but also contributed by bone-marrow precursors in response to cerebral ischemia

ABSTRACT: Immune response following CNS disease and injury comprises three different compartments, parenchymal, perivascular and blood involving specialized immune cells. Microglia are the major immune cell residing in the CNS parenchymal compartment but together with other macrophages which are residing in the non-parenchymal structures such as perivascular spaces, leptomeninges and choroid plexus constitute the total macrophage population of the CNS. While the homeostatic functions of these specialized macrophages in not very well understood, evidence shows that these macrophages at the blood-brain interface might involve immune-surveillance and establish a gate way for the recruitment of peripheral immune cells in to the CNS in response to the pathological stimuli. In humans and rats these macrophages identified exclusively by the high levels of scavenger receptor CD163

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE99206 | GEO | 2019/06/30

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

HOST MICROBIOTA REGULATE SELECTIVE MYELOID SUBSETS IN THE CENTRAL NERVOUS SYSTEM DURING HOMEOSTASIS AND DISEASE

Project description:The immune cells of the central nervous system (CNS) comprise parenchymal microglia and at the CNS border regions meningeal, perivascular and choroid plexus macrophages (summarized as CNS-associated macrophages, CAMs). Previous work has uncovered that microglial properties are strongly dependent on environmental signals from the commensal microbiota while its effect on CAMs remained unknown. By combining several microbiota manipulation approaches, genetic mouse models and single-cell RNA-sequencing, we comprehensively characterized CNS myeloid cell composition and function. Under steady-state, the transcriptional profile and numbers of choroid plexus macrophages were found to be tightly steered by complex microbiota. Divergently, perivascular and meningeal macrophages were affected to a lesser extent. An acute perturbation through viral infection evoked an attenuated immune response of all CAMs in germ-free mice. Additionally, we assessed CAMs in a more chronic pathological state in 5xFAD mice as a model for Alzheimer’s disease whereby exclusively perivascular macrophages displayed enhanced amyloid beta uptake in GF 5xFAD mice. Our results provide novel insights for understanding distinct microbiota-CNS macrophage interactions during health and perturbation that could potentially be targeted therapeutically.

2021-10-01 | GSE178956 | GEO

Early fate defines microglia and non-parenchymal brain macrophage development

Project description:Central nervous system (CNS) macrophages comprise parenchymal microglia and border-associated macrophages (BAMs) residing in the meninges, the choroid plexus and the perivascular spaces. With the exception of choroid plexus macrophages, most CNS macrophages emerge during primitive hematopoiesis in the extra-embryonic yolk sac. What remains unknown however, is whether microglia and BAMs share a developmental program or arise from separate predefined lineages. Here, we identified two phenotypically, transcriptionally and locally distinct brain macrophage populations throughout development, giving rise to microglia and BAMs. Two independent macrophage populations were already present in the yolk sac prior to their seeding of the brain. Using fate-mapping system, we demonstrate that in contrast to microglia, the pool of embryonic BAMs in the choroid plexus and the meninges was gradually replaced by precursors emerging later in embryogenesis. The development of microglia was dependent on TGF-β whereas the genesis and maturation of BAMs occurred independently of this cytokine. Collectively, our data show that developing parenchymal and non-parenchymal brain macrophages are separate entities in terms of ontogeny, gene expression signatures and requirement for TGF-β.

2020-04-15 | GSE146926 | GEO

Early fate defines microglia and non-parenchymal brain macrophage development

2020-04-16 | GSE146928 | GEO

RNA-seq of human cerebromicrovascular endothelial cell line hCMEC/D3 or primary human brain vascular pericytes stimulated with TNF, or S. pneumoniae, in monoculture or in coculture, or stimulated with conditioned media from monocyte-derived macrophages (MDM) stimulated with S. pneumoniae, all compared to unstimulated controls

Project description:The interplay of cerebromicrovascular endothelial cells, pericytes and perivascular macrophages is central to the recruitment of neutrophils across the blood-brain barrier into the brain, and therefore to the CNS inflammatory response. This experiment examined the endothelial response to direct stimulation in the presence or absence of pericytes to explore the effect of co-culture on the endothelial inflammatory response. It also assessed the endothelial response to signalling by monocyte-derived macrophages, modelling perivascular macrophages, the only canonical innate immune cell found within the perivascular space.

2022-08-31 | E-MTAB-11129 | biostudies-arrayexpress

RNA sequencing data of CNS-associated macrophages (CAMs) isolated from brains of Mrc1-CreERT2 mice

Project description:All tissue resident macrophages of the central nervous system (CNS), including parenchymal microglia as well as CNS-associated macrophages (CAMs) such as meningeal (mMF) and perivascular macrophages (pvMF) are part of the CNS endogenous innate immune system that acts as the first line of defense during infections or trauma. It has been suggested that microglia and all CAM subsets are derived from prenatal cellular sources in the yolk sac that were defined as early erythromyeloid progenitors. However, the precise ontogenetic relationships, the underlying transcriptional programs and the molecular signals that drive the development of distinct CAMs subsets in situ are poorly understood. Using novel fate mapping systems, single-cell profiling and cell-specific mutants, we show that only mMF and microglia share a common prenatal progenitor. In contrast, pvMF originate from perinatal mMF only after birth in an integrin-dependent manner. Furthermore, the establishment of pvMF critically requires the presence of vascular smooth muscle cells. In summary, our data reveal a novel precisely timed process in distinct anatomical niches for the establishment of CNS macrophage subsets.

2022-01-27 | GSE194433 | GEO

RNA sequencing data of microglia, meningeal macrophages (mMΦ) and perivascular macrophages (pvMΦ) isolated from brains of Cx3cr1-GFP mice at different age.

Project description:All tissue resident macrophages of the central nervous system (CNS), including parenchymal microglia as well as CNS-associated macrophages (CAMs) such as meningeal (mMF) and perivascular macrophages (pvMF) are part of the CNS endogenous innate immune system that acts as the first line of defense during infections or trauma. It has been suggested that microglia and all CAM subsets are derived from prenatal cellular sources in the yolk sac that were defined as early erythromyeloid progenitors. However, the precise ontogenetic relationships, the underlying transcriptional programs and the molecular signals that drive the development of distinct CAMs subsets in situ are poorly understood. Using novel fate mapping systems, single-cell profiling and cell-specific mutants, we show that only mMF and microglia share a common prenatal progenitor. In contrast, pvMF originate from perinatal mMF only after birth in an integrin-dependent manner. Furthermore, the establishment of pvMFcritically requires the presence of vascular smooth muscle cells. In summary, our data reveal a novel precisely timed process in distinct anatomical niches for the establishment of CNS macrophage subsets.

2022-01-27 | GSE194432 | GEO

Specification of CNS macrophage subsets occurs postnatally in defined anatomical niches

Project description:All tissue resident macrophages of the central nervous system (CNS), including parenchymal microglia as well as CNS-associated macrophages (CAMs) such as meningeal (mMF) and perivascular macrophages (pvMF) are part of the CNS endogenous innate immune system that acts as the first line of defense during infections or trauma. It has been suggested that microglia and all CAM subsets are derived from prenatal cellular sources in the yolk sac that were defined as early erythromyeloid progenitors. However, the precise ontogenetic relationships, the underlying transcriptional programs and the molecular signals that drive the development of distinct CAMs subsets in situ are poorly understood. Using novel fate mapping systems, single-cell profiling and cell-specific mutants, we show that only mMF and microglia share a common prenatal progenitor. In contrast, pvMF originate from perinatal mMF only after birth in an integrin-dependent manner. Furthermore, the establishment of pvMF critically requires the presence of vascular smooth muscle cells. In summary, our data reveal a novel precisely timed process in distinct anatomical niches for the establishment of CNS macrophage subsets.

2022-01-26 | GSE195437 | GEO

Single-cell profiling of the myeloid landscape identifies cell subsets with distinct fates during neuroinflammation

Project description:The innate immune cell compartment is highly diverse in the healthy central nervous system (CNS) including parenchymal and non-parenchymal macrophages. However, this complexity is increased in inflammatory settings by the recruitment of circulating myeloid cells. It is unclear which disease-specific myeloid subsets exist and what their transcriptional profiles and dynamics during CNS pathology are. By combining deep single-cell transcriptome analysis, fate mapping, in vivo imaging, clonal analysis, and transgenic lines, we comprehensively characterized unappreciated myeloid subsets in several CNS compartments during neuroinflammation. During inflammation, CNS macrophage subsets undergo self-renewal, and random proliferation shifted towards clonal expansion. Finally, functional studies demonstrated that endogenous CNS tissue macrophages are redundant for antigen presentation. Our results highlight myeloid cell diversity and provide insights into the brain’s innate immune system.

2019-01-25 | GSE118948 | GEO

Cell specific gene silencing of lipid-siRNA conjugates in the mouse central nervous system (CNS)

Project description:We developed a lipid-siRNA conjugate, termed EG18, that potentiates prolonged gene silencing throughout the CNS after injection into CSF. To help inform viable therapeutic targets, we used scRNAseq to determine cell-specific gene silencing. Here, we used an siRNA sequencing targeting Ppib and inject 15 nmol of either Ppib-EG18 or a non-targeting control (NTC)-EG18 into the lateral ventricles of adult mice. After 1 month, brains were dissociated into single cells and bead-sorted into Cd11b+ and Cd11b- populations. The Cd11b+ dataset contains microglia and macrophages, while the Cd11b- sample comprised a sampling of other isolated perivascular and parenchymal populations. scRNAseq revealed gene silencing activity across diverse cell populations in the parenchyma and at brain borders, which may provide new avenues for disease-modifying therapies.

2024-04-30 | E-MTAB-13964 | biostudies-arrayexpress

Engrafted parenchymal brain macrophages differ from microglia in transcriptome, chromatin landscape and response to challenge (ATAC-Seq)

Project description:Microglia are yolk sac-derived macrophages residing in the parenchyma of brain and spinal cord, where they interact with neurons and other glial cells by constantly probing their surroundings with dynamic extensions. After different conditioning paradigms and bone marrow (BM) or hematopoietic stem cell (HSC) transplantation, graft-derived cells seed the brain and persistently contribute to the parenchymal brain macrophage compartment. Here we establish that graft-derived macrophages acquire, over time, microglia characteristics, including ramified morphology, longevity, radio-resistance and clonal expansion. However, even after prolonged CNS residence, transcriptomes and chromatin accessibility landscapes of engrafted, BM-derived macrophages remain distinct from yolk sac-derived host microglia. Furthermore, engrafted BM-derived cells display discrete responses to peripheral endotoxin challenge, as compared to host microglia. In human HSC transplant recipients, engrafted cells also remain distinct from host microglia, extending our finding to clinical settings. Collectively, our data emphasize the molecular and functional heterogeneity of parenchymal brain macrophages and highlight potential clinical implications for HSC gene therapies aimed to ameliorate lysosomal storage disorders, microgliopathies or general monogenic immuno-deficiencies.

2018-11-21 | GSE122768 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data