Project description:Astrocytes, a major cell type found throughout the central nervous system, have general roles in the modulation of synapse formation and synaptic transmission, blood-brain-barrier formation and regulation of blood flow, as well as metabolic support of other brain resident cells. To investigate the true extent of astrocyte molecular diversity across forebrain regions, we used single cell RNA sequencing and generated a database containing ~2000 astrocytes. Our analysis identifies five transcriptomically distinct astrocyte subtypes in adult mouse cortex and hippocampus. Validation of our data in situ reveals distinct spatial positioning of defined subtypes, reflecting the distribution of morphologically and physiologically distinct astrocyte populations. Our findings are evidence for specialized astrocyte subtypes between and within brain regions.

2019-12-13 | GSE114000 | GEO

Transcriptional profiling of astrocyte subtypes in naive mice and during experimental autoimmune encephalomyelitis

Project description:We isolated and gene expression profiled distinct astrocyte subtypes from three central nervous system regions: forebrain, hindbrain, and spinal cord, using a FACS-based protocol. Cell surface expression of Glast/Slc1a3 (G) and Acsa-2/Atp1b2 (A) was used to distinguish subpopulations of astrocytes. Furthermore, we assessed the transcriptome of cultured primary neonatal astrocytes. The local brain environment proved key in establishing different transcriptional programs in astrocyte subtypes. Functional differences between subtypes were also apparent in experimental autoimmune encephalomyelitics (EAE) mice, where these astrocyte subtypes showed distinct responses. While gene expression signatures associated with blood-brain-barrier maintenance were lost during EAE, signatures contributing to neuroinflammation were increased specifically in astrocytes in the spinal cord.

2021-01-18 | GSE136358 | GEO

Neuroinflammatory astrocyte subtypes in the mouse brain

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-06-03 | GSE148612 | GEO

Neuroinflammatory astrocyte subtypes in the mouse brain [scRNAseq]

Project description:Single cell RNAseq of FACS-purified astrcoytes from saline- and LPS-injected Aldh1l1egfp mice at 24h and comparison male vs female

2021-06-03 | GSE148611 | GEO