A multi-domain fragment of Nogo-A protein is a potent inhibitor of cortical axon regeneration via Nogo receptor 1
| Autor: | Rebecca H. Brown, Byung Gon Kim, Eric A. Huebner, Philip Duffy, Stephen M. Strittmatter |
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| Rok vydání: | 2011 |
| Předmět: |
Nogo Proteins
Receptors Cell Surface Biology GPI-Linked Proteins Biochemistry Myelin Mice Dorsal root ganglion Neurobiology Ganglia Spinal Nogo Receptor 1 mental disorders Chlorocebus aethiops medicine Animals Humans Regeneration Axon Receptors Immunologic Receptor Molecular Biology Cells Cultured Cerebral Cortex Cell Biology Axons Cell biology Protein Structure Tertiary medicine.anatomical_structure Cerebral cortex Immunology Neuron Chickens psychological phenomena and processes Myelin Proteins |
| Zdroj: | The Journal of biological chemistry. 286(20) |
| ISSN: | 1083-351X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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