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Nogo and the Nogo-66 receptor
Alyson E Fournier1, Tadzia GrandPré, Graham Gould
1Department of Neurology, Section of Neurobiology, Yale University School of Medicine, P.O. Box 208018, New Haven, CT 06510, USA.
Progress in Brain Research
|November 21, 2002
Summary
Researchers identified a Nogo-66 receptor that binds Nogo-66, a protein inhibiting central nervous system (CNS) axonal regeneration. Blocking this interaction may promote nerve repair after CNS injury.
Area of Science:
- Neuroscience
- Cell Biology
- Regenerative Medicine
Background:
- Nogo is a key inhibitor of axonal regeneration in the adult central nervous system (CNS).
- The axon-inhibiting Nogo-66 domain is found on the extracellular surface and within the endoplasmic reticulum lumen of cells.
Purpose of the Study:
- To identify proteins that interact with Nogo-66.
- To understand the mechanism of Nogo-66-mediated axonal inhibition.
- To explore therapeutic strategies for promoting CNS regeneration.
Main Methods:
- Identification of a novel brain-specific leucine-rich repeat protein.
- Analysis of Nogo-66 receptor interaction with Nogo-66.
- Assessment of Nogo-66 receptor's role in mediating axonal inhibition.
Main Results:
- A brain-specific protein with high affinity for soluble Nogo-66 was identified.
- Cleavage of the Nogo-66 receptor from neurons makes them insensitive to Nogo-66.
- Expression of the Nogo-66 receptor confers Nogo-66 sensitivity to unresponsive neurons.
Conclusions:
- The identified Nogo-66 receptor is crucial for Nogo-66-mediated axonal growth inhibition.
- Understanding Nogo-66 and its receptor allows for mapping structure-function relationships in axon regeneration.
- Blocking the Nogo-66/receptor interaction is a potential therapeutic strategy for CNS injury recovery.