LINGO-1 shRNA Loaded by Pluronic F-127 Promotes Functional Recovery After Ventral Root Avulsion

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biomaterials Science

Background:

• Spinal root avulsion causes severe motoneuron death and functional loss.
• Inhibitory molecules and poor regeneration hinder recovery after avulsion.
• Leucine-rich repeat and immunoglobulin-like domain-containing Nogo receptor-interacting protein 1 (LINGO-1) inhibits axonal regeneration.

Purpose of the Study:

• To investigate the therapeutic potential of LINGO-1 knockdown for spinal root avulsion.
• To evaluate the efficacy of delivering LINGO-1 short hairpin interfering RNA (shRNA) via Pluronic F-127 hydrogel after brachial plexus avulsion (BPA).

Main Methods:

• A LINGO-1 knockdown strategy using lentiviral vectors encoding LINGO-1 shRNA was employed.
• The lentiviral vectors were encapsulated within Pluronic F-127 (PF-127) hydrogel.
• This hydrogel was delivered following brachial plexus avulsion (BPA) and immediate reimplantation in a rat model.

Main Results:

• Delivery of LINGO-1 shRNA via PF-127 hydrogel rescued injured motoneurons post-BPA.
• Enhanced axonal outgrowth, myelination, and motor endplate rebuilding were observed.
• Improved angiogenesis and functional recovery of avulsed forelimbs were achieved.
• Combined delivery of LINGO-1 shRNA and hydrogel reinforced therapeutic effects.

Conclusions:

• LINGO-1 knockdown using lentiviral vectors delivered by PF-127 hydrogel is a promising therapeutic strategy for brachial plexus avulsion.
• This approach promotes neuron survival, axonal regeneration, and functional restoration.
• The combination of gene therapy and hydrogel scaffolds offers a novel treatment for nerve avulsion injuries.