Direct gene transfer into rabbit peripheral nerve in vivo

Area of Science:

• Biotechnology
• Regenerative Medicine
• Molecular Biology

Background:

• Peripheral nerve injuries often result in functional deficits.
• Current treatments for nerve repair have limitations in promoting complete functional recovery.
• Direct gene transfer at nerve anastomosis sites offers a novel therapeutic approach.

Purpose of the Study:

• To investigate the feasibility of using exogenous gene-sutured material for peripheral nerve anastomosis.
• To determine if genes can be directly transferred and expressed at nerve repair sites.
• To assess the potential of this method for enhancing nerve regeneration.

Main Methods:

• Exogenous gene transfer using a plasmid encoding beta-galactosidase (lacZ gene) via sutures.
• Epineurial repair of rabbit sciatic nerves using gene-soaked sutures.
• Histochemical staining and enzyme activity assays to detect gene expression at anastomosis sites at various time points post-operation.

Main Results:

• Indigo-positive cells indicating gene expression were observed at anastomosis sites in the experimental group, but not in the control group.
• Detectable beta-galactosidase enzyme activity was present in the experimental group from day 3 to day 30 post-operation.
• No gene expression or enzyme activity was detected in the control group.

Conclusions:

• Exogenous gene sutures enable successful transfer and bioactive expression of genes at peripheral nerve anastomosis sites.
• This technique provides a feasible strategy for gene therapy to accelerate nerve function recovery.
• The study supports the potential of localized gene delivery for nerve regeneration.