Detergent-free Decellularized Nerve Grafts for Long-gap Peripheral Nerve Reconstruction

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Current treatments for long-gap peripheral nerve defects include autografts and allografts.
• Autografts have limited supply and cause donor-site morbidity.
• Allografts necessitate immunosuppression, posing significant risks.

Purpose of the Study:

• To investigate detergent-free decellularized (DFD) nerve grafts for long-gap peripheral nerve defect reconstruction.
• To compare the efficacy of DFD grafts with detergent-processed grafts and controls in a rodent model.

Main Methods:

• Sciatic nerves from donor rats were used to create grafts.
• Twenty-four recipient rats with sciatic nerve transections were divided into four groups: nerve grafts (NG), DFD grafts, detergent decellularized grafts, and silicone tube conduits.
• Graft/conduit implantation and assessment of functional muscle analysis and nerve histomorphometry at 12 weeks.

Main Results:

• Histomorphometry showed maximum nerve growth in the NG group.
• DFD and detergent decellularized grafts demonstrated comparable nerve regeneration at 12 weeks.
• Functional recovery was observed in both NG and DFD groups, while silicone tubes showed no regeneration.

Conclusions:

• A detergent-free nerve decellularization technique was developed for long-gap nerve injury repair.
• DFD nerve grafts are effective in promoting regeneration and functional recovery.
• DFD grafts present a viable alternative to current nerve reconstruction strategies.