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Astrocyte Phenotypes: Emphasis on Potential Markers in Neuroinflammation

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Date 2020 Nov 23
PMID 33226087
Citations 8
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Abstract

Astrocytes, the most abundant glial cells in the central nervous system (CNS), have numerous integral roles in all CNS functions. They are essential for synaptic transmission and support neurons by providing metabolic substrates, secreting growth factors and regulating extracellular concentrations of ions and neurotransmitters. Astrocytes respond to CNS insults through reactive astrogliosis, in which they go through many functional and molecular changes. In neuroinflammatory conditions reactive astrocytes exert both beneficial and detrimental functions, depending on the context and heterogeneity of astrocytic populations. In this review we profile astrocytic diversity in the context of neuroinflammation; with a specific focus on multiple sclerosis (MS) and its best-described animal model experimental autoimmune encephalomyelitis (EAE). We characterize two main subtypes, protoplasmic and fibrous astrocytes and describe the role of intermediate filaments in the physiology and pathology of these cells. Additionally, we outline a variety of markers that are emerging as important in investigating astrocytic biology in both physiological conditions and neuroinflammation.

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References
1.
Abbott N, Ronnback L, Hansson E . Astrocyte-endothelial interactions at the blood-brain barrier. Nat Rev Neurosci. 2005; 7(1):41-53. DOI: 10.1038/nrn1824. View

2.
Albrecht P, Murtie J, Ness J, Redwine J, Enterline J, Armstrong R . Astrocytes produce CNTF during the remyelination phase of viral-induced spinal cord demyelination to stimulate FGF-2 production. Neurobiol Dis. 2003; 13(2):89-101. DOI: 10.1016/s0969-9961(03)00019-6. View

3.
Allen N, Eroglu C . Cell Biology of Astrocyte-Synapse Interactions. Neuron. 2017; 96(3):697-708. PMC: 5687890. DOI: 10.1016/j.neuron.2017.09.056. View

4.
Anderson M, Ao Y, Sofroniew M . Heterogeneity of reactive astrocytes. Neurosci Lett. 2013; 565:23-9. PMC: 3984948. DOI: 10.1016/j.neulet.2013.12.030. View

5.
Anderson M, Burda J, Ren Y, Ao Y, OShea T, Kawaguchi R . Astrocyte scar formation aids central nervous system axon regeneration. Nature. 2016; 532(7598):195-200. PMC: 5243141. DOI: 10.1038/nature17623. View