Document Type
Journal Article
Publication Date
11-24-2015
Journal
Cell Reports
DOI
10.1016/j.celrep.2015.11.002
Keywords
Astrocytes--\metabolism; Demyelinating Diseases--metabolism; Neural Stem Cells--metabolism; Receptor, Endothelin B--metabolism
Abstract
Reactive astrogliosis is an essential and ubiquitous response to CNS injury, but in some cases, aberrant activation of astrocytes and their release of inhibitory signaling molecules can impair endogenous neural repair processes. Our lab previously identified a secreted intercellular signaling molecule, called endothelin-1 (ET-1), which is expressed at high levels by reactive astrocytes in multiple sclerosis (MS) lesions and limits repair by delaying oligodendrocyte progenitor cell (OPC) maturation. However, as ET receptors are widely expressed on neural cells, the cell- and receptor-specific mechanisms of OPC inhibition by ET-1 action remain undefined. Using pharmacological approaches and cell-specific endothelin receptor (EDNR) ablation, we show that ET-1 acts selectively through EDNRB on astrocytes-and not OPCs-to indirectly inhibit remyelination. These results demonstrate that targeting specific pathways in reactive astrocytes represents a promising therapeutic target in diseases with extensive reactive astrogliosis, including MS.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
APA Citation
Epub ahead of print
Peer Reviewed
1
Open Access
1
Comments
Reproduced with permission of Elsevier B.V. Cell Reports.