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A multi-domain fragment of Nogo-A protein is a potent inhibitor of cortical axon regeneration via Nogo receptor 1.

Authors
Huebner, EA; Kim BG, BG; Duffy, PJ; Brown, RH; Strittmatter, SM
Citation
The Journal of biological chemistry, 286(20):18026-18036, 2011
Journal Title
The Journal of biological chemistry
ISSN
0021-92581083-351X
Abstract
Nogo-A limits axon regeneration and functional recovery after central nervous system injury in adult mammals. Three regions of Nogo-A (Nogo-A-24, Nogo-66, and Nogo-C39) interact with the neuronal Nogo-66 receptor 1 (NgR1). Nogo-66 also interacts with a structurally unrelated cell surface receptor, paired immunoglobulin-like receptor (PirB). We show here that the other two NgR1-interacting domains, Nogo-A-24 and Nogo-C39, also bind to PirB with high affinity. A purified 22-kDa protein containing all three NgR1- and PirB-interacting domains (Nogo-22) is a substantially more potent growth cone-collapsing molecule than Nogo-66 for chick dorsal root ganglion neurons and mature cortical neurons. Moreover, Nogo-22 inhibits axon regeneration of mature cortical neurons in vitro more potently than does Nogo-66. Although all three NgR1-interacting domains of Nogo-A also interact with PirB, expression of PirB in mature cortical cultures is nearly undetectable. Consistent with a relatively minor role for PirB in mature cortical neurons, Nogo-22 inhibition of axon regeneration is abolished by genetic deletion of NgR1. Thus, NgR1 is the predominant receptor for Nogo-22 in regenerating cortical neurons.
MeSH terms
AnimalsAxons/*metabolismCells, CulturedCercopithecus aethiopsCerebral Cortex/cytology/*metabolismChickensGPI-Linked Proteins/genetics/metabolismGanglia, Spinal/cytology/metabolismHumansMiceMyelin Proteins/genetics/*metabolismProtein Structure, TertiaryReceptors, Cell Surface/genetics/*metabolismReceptors, Immunologic/genetics/metabolismRegeneration/*physiology
DOI
10.1074/jbc.M110.208108
PMID
21454605
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Brain Science
AJOU Authors
김, 병곤
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