Beneficially Stressing the Peripheral Nervous System to Repair

Area of Science:

• Neuroscience
• Cellular Biology
• Regenerative Medicine

Background:

• Peripheral nerve injury poses significant challenges to axon regeneration and functional recovery.
• Understanding the intrinsic cellular stress responses of neurons is crucial for developing effective repair strategies.

Purpose of the Study:

• To summarize key axonal and neuronal adaptive stress responses involved in peripheral axon regeneration.
• To highlight therapeutic strategies, including acute intermittent hypoxia, that enhance neuronal repair mechanisms.

Main Methods:

• Review of existing literature on neuronal stress responses and axon regeneration.
• Focus on the role of the unfolded protein response and Luman/CREB3.
• Discussion of therapeutic interventions like acute intermittent hypoxia and electrical nerve stimulation.

Main Results:

• Activation of the unfolded protein response and Luman/CREB3 are key adaptive stress responses enabling axon regeneration.
• Therapeutic acute intermittent hypoxia acts as a beneficial stressor, enhancing gene programs for regeneration.
• This non-invasive approach shows potential comparable to electrical nerve stimulation.

Conclusions:

• Manipulating intrinsic adaptive stress and repair responses in injured peripheral neurons is a promising therapeutic avenue.
• Acute intermittent hypoxia represents a novel, non-invasive strategy to promote nerve regeneration.
• Further clinical evidence supports the use of these strategies for improving functional outcomes after nerve injury.