Cited by 59Neuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration MechanismsNeurogenesis and neuroplasticity mechanisms

Intracortical astrocyte subpopulations defined by astrocyte reporter Mice in the adult brain

Morel, Lydie, Men, Yuqin, Chiang, Ming S. R., Tian, Yang, Jin, Shijie, Yelick, Julia, Higashimori, Haruki, Yang, Yongjie·2019·Glia

Abstract

Although historically regarded as a homogeneous cell population, astrocytes in different brain regions exhibit differences in their physiological properties, such as gap‐junction coupling, glutamate uptake dynamics, and intracellular Ca 2+ response. Recent in vivo RNA profiles have further demonstrated the molecular heterogeneity of astrocytes in the adult CNS. Astrocyte heterogeneity exists not only inter‐regionally but also intra‐regionally. Despite the characteristic laminal organization of cortical layers and multiple sources of radial glia progenitors for (astro)gliogenesis, the molecular profile and functional properties of astroglial subpopulations in the adult cerebral cortex remain essentially undefined. Using two astrocyte reporter mouse lines: eaat2 ‐tdTomato and Bac aldh1l1 ‐eGFP, we identified tdT − eGFP + , tdT low eGFP + , and tdT high eGFP + astroglial subpopulations (in an approximate 1:7:2 ratio) within the cortex. The tdT − eGFP + astrocyte population is selectively localized at layers I–II and exhibits increased resting membrane potential and membrane resistance but reduced functional expression of the potassium channel Kir4.1. We also isolated individual astrocyte subpopulations through fluorescence activated cell sorting (FACS) and examined their transcriptome differences by RNA‐seq. We found that the whole‐genome transcriptional profiles of tdT − eGFP + astrocytes are drastically different from that of tdT low eGFP + and tdT high eGFP + astrocytes. Particularly, elevated levels of several nonastrocyte genes that are typically specific to other glial cells, such as mog , mobp , Iba1 , and pdgfrα , are observed in tdT − eGFP + astrocytes, suggesting a less‐specific molecular identity of these astrocytes. Overall, our study has unveiled molecular differences between adult cortical astroglial subpopulations, shedding new light on understanding their unique functions in the adult cortex.

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Crossref · 10.1002/glia.23545

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Authors
Morel, L., Men, Y., Chiang, M. S. R., Tian, Y., Jin, S., Yelick, J., Higashimori, H., & Yang, Y.
Affiliations
Tufts University (US)
Corresponding author
Yang, Yongjie
Venue
Glia
Publisher
Wiley
Published
2018-11-14
Volume
67
Issue
1
Pages
171-181
ISSN
  • 0894-1491 (ISSN-L)
  • 1098-1136
OpenAlex
W2900728500
Cited by
59
References
35
Citations by year
2026: 3 · 2025: 5 · 2024: 4 · 2023: 6 · 2022: 7 · 2021: 13 · 2020: 16 · 2019: 4 · 2018: 1
FWCI
3.87
Type
journal article
Language
en
Open access
closed
Locations
  • Glia (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (R21NS087391, R01MH106490, R01MH099554)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
astrocyte heterogeneity, cerebral cortex, cortical layers, resting membrane potential, Kir4.1 potassium channel, astrocyte transcriptome, adult brain
MeSH terms
Age Factors, Animals, Astrocytes, Brain, Cerebral Cortex, Female, Flow Cytometry, Male, Mice, Inbred C57BL, Mice, Transgenic, Organ Culture Techniques, Random Allocation, Mice

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