Abstract
The three known inhibitors of axonal regeneration present in myelin--MAG, Nogo, and OMgp--all interact with the same receptor complex to effect inhibition via protein kinase C (PKC)-dependent activation of the small GTPase Rho. The transducing component of this receptor complex is the p75 neurotrophin receptor. Here we show that MAG binding to cerebellar neurons induces alpha- and then gamma-secretase proteolytic cleavage of p75, in a protein kinase C-dependent manner, and that this cleavage is necessary for both activation of Rho and inhibition of neurite outgrowth.
MeSH Terms
Amyloid Precursor Protein Secretases
Animals
Animals, Newborn
Aspartic Acid Endopeptidases/pharmacology
Blotting, Western/methods
Cells, Cultured
Cerebellum/cytology
Cricetinae
Cricetulus
Drug Interactions
Endopeptidases
Enzyme Activation/drug effects
Enzyme Inhibitors/pharmacology
Membrane Proteins/metabolism
Myelin-Associated Glycoprotein/pharmacology
Neural Inhibition/drug effects
Neurites/drug effects,physiology
Neuroblastoma
Neurons/drug effects,physiology
Oligopeptides/pharmacology
Protein Structure, Tertiary/physiology
Rats
Receptor, Nerve Growth Factor
Receptors, Nerve Growth Factor/chemistry,metabolism
Recombinant Fusion Proteins/metabolism,pharmacology
Tetradecanoylphorbol Acetate/pharmacology
Transfection/methods
rho GTP-Binding Proteins/metabolism
Chemicals
Enzyme Inhibitors
Membrane Proteins
Myelin-Associated Glycoprotein
Oligopeptides
Receptor, Nerve Growth Factor
Receptors, Nerve Growth Factor
Recombinant Fusion Proteins
Amyloid Precursor Protein Secretases
Endopeptidases
Aspartic Acid Endopeptidases
rho GTP-Binding Proteins
Tetradecanoylphorbol Acetate
epoxomicin
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Domeniconi Marco
Biology Department, Hunter College, City University of New York, 695 Park Avenue, New York, New York 10021, USA.
Zampieri Niccolò
Spencer Tim
Hilaire Melissa
Mellado Wilfredo
Chao Moses V
Filbin Marie T