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Oxidized galectin-1 is an essential factor for peripheral nerve regeneration
Hidenori Horie1, Toshihiko Kadoya, Kazunori Sango
1Advanced Research Center for Biological Science, Waseda University, Waseda University Higashifushimi Campus, Nishitokyo City, Tokyo, Japan. horie-hidenori@waseda.jp
Current Drug Targets
|July 20, 2005
Summary
Oxidized galectin-1 (GAL-1/Ox) promotes axonal regeneration after peripheral nerve injury. This protein stimulates macrophages to enhance nerve repair and functional recovery, suggesting its potential for treating nerve damage.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Molecular Biology
Background:
- Peripheral nerve injury hinders axonal regeneration.
- The precise molecular signals initiating axonal regrowth remain unclear.
- Galectin-1 (GAL-1) is present in regenerating nerves and neurons.
Purpose of the Study:
- To investigate the role of oxidized galectin-1 (GAL-1/Ox) in peripheral nerve regeneration.
- To elucidate the mechanism by which GAL-1/Ox promotes axonal growth after injury.
Main Methods:
- In vitro and in vivo peripheral nerve regeneration models.
- Utilized oxidized recombinant human galectin-1 (rhGAL-1/Ox).
- Western blot analysis to detect GAL-1 forms in cell culture media.
Main Results:
- rhGAL-1/Ox at low concentrations promoted initial axonal growth in vitro and in vivo.
- Anti-rhGAL-1 antibodies inhibited axonal regeneration.
- Both reduced and oxidized GAL-1 forms were detected in culture media.
- GAL-1/Ox stimulated macrophages to secrete axonal regeneration-promoting factors.
Conclusions:
- Extracellular GAL-1/Ox, derived from cytosolic GAL-1 released by Schwann cells and axons, is crucial for initiating peripheral nerve repair.
- GAL-1/Ox enhances regeneration by stimulating macrophages to release growth factors, promoting axonal growth and Schwann cell migration.
- rhGAL-1/Ox represents a potential therapeutic agent for restoring function in injured peripheral nerves.