alexa Myelin-associated glycoprotein as a functional ligand for the Nogo-66 receptor.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Liu BP, Fournier A, GrandPr T, Strittmatter SM

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Abstract Axonal regeneration in the adult central nervous system (CNS) is limited by two proteins in myelin, Nogo and myelin-associated glycoprotein (MAG). The receptor for Nogo (NgR) has been identified as an axonal glycosyl-phosphatidyl-inositol (GPI)-anchored protein, whereas the MAG receptor has remained elusive. Here, we show that MAG binds directly, with high affinity, to NgR. Cleavage of GPI-linked proteins from axons protects growth cones from MAG-induced collapse, and dominant-negative NgR eliminates MAG inhibition of neurite outgrowth. MAG-resistant embryonic neurons are rendered MAG-sensitive by expression of NgR. MAG and Nogo-66 activate NgR independently and serve as redundant NgR ligands that may limit axonal regeneration after CNS injury. This article was published in Science and referenced in Journal of Addiction Research & Therapy

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