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- W2000730164 abstract "The lack of axonal growth after injury in the adult central nervous system (CNS) is due to several factors including the formation of a glial scar, the absence of neurotrophic factors, the presence of growth-inhibitory molecules associated with myelin and the intrinsic growth-state of the neurons. To date, three inhibitors have been identified in myelin: Myelin-Associated Glycoprotein (MAG), Nogo-A, and Oligodendrocyte-Myelin glycoprotein (OMgp). In previous studies we reported that MAG inhibits axonal regeneration by high affinity interaction (K(D) 8 nM) with the Nogo66 receptor (NgR) and activation of a p75 neurotrophin receptor (p75NTR)-mediated signaling pathway. Similar to other axon guidance molecules, MAG is bifunctional. When cultured on MAG-expressing cells, dorsal root ganglia neurons (DRG) older than post-natal day 4 (PND4) extend neurites 50% shorter on average than when cultured on control cells. In contrast, MAG promotes neurite outgrowth from DRG neurons from animals younger than PND4. The response switch, which is also seen in retinal ganglia (RGC) and Raphe nucleus neurons, is concomitant with a developmental decrease in the endogenous neuronal cAMP levels. We report that artificially increasing cAMP levels in older neurons can alter their growth-state and induce axonal growth in the presence of myelin-associated inhibitors." @default.
- W2000730164 created "2016-06-24" @default.
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- W2000730164 date "2005-06-01" @default.
- W2000730164 modified "2023-09-23" @default.
- W2000730164 title "Overcoming inhibitors in myelin to promote axonal regeneration" @default.
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- W2000730164 doi "https://doi.org/10.1016/j.jns.2005.03.023" @default.
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