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The Role of Astrocytes in Remyelination.
Remyelination is the regeneration of myelin sheaths following demyelination. This regenerative process is critical for the re-establishment of axonal conduction velocity and metabolic support to the axons. Successful remyelination in the CNS generally depends on the activation, proliferation, and differentiation of oligodendrocyte progenitor cells (OPCs). However, other cell types play critical roles in establishing where a lesion is conducive for regeneration. In the last few years, several studies have described beneficial and detrimental roles played by astrocytes in remyelination. This review will discuss recent developments in the concept of astrocyte reactivity, what is known about the astrocytic contribution to remyelination, and highlight future avenues of investigation.The authors’ laboratory is supported by funding from the UK Multiple Sclerosis Society (MS50), The Adelson Medical Research Foundation, and a core support grant from the Wellcome and MRC to the Wellcome-Medical Research Council Cambridge Stem Cell Institute (203151/Z/16/Z). KSR is supported by a postdoctoral fellowship from the Multiple Sclerosis Society of Canad