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Fabrication of the Composite Regenerative Peripheral Nerve Interface C-RPNI in the Adult Rat
Published on: February 25, 2020
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Dual-bionic regenerative microenvironment for peripheral nerve repair
Yanjun Guan1,2,3, Zhiqi Ren1,3, Boyao Yang1,3
1Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, PR China.
Bioactive Materials
|March 21, 2023
Summary
A novel dual-bionic nerve graft material, combining polycaprolactone/silk fibroin with extracellular matrix from stem cells, shows promise for peripheral nerve repair, matching autologous grafts in rat models.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Autologous nerve grafts are the gold standard for peripheral nerve defects but face limitations in availability and donor site morbidity.
- Allogeneic nerve implants are hindered by insufficient human donor availability.
- Tissue-engineered materials aim to replicate the neural microenvironment, including extracellular matrix (ECM) signals, to support nerve regeneration.
Purpose of the Study:
- To fabricate and evaluate a dual-bionic nerve regeneration material using polycaprolactone/silk fibroin (PCL/SF) and human umbilical cord mesenchymal stem cell-derived ECM (hUMSC-ECM).
- To assess the biomimetic material's ability to support Schwann cell anchorage, axon regeneration, and angiogenesis.
- To compare the efficacy of the dual-bionic graft with autologous nerve grafts in a rat peripheral nerve defect model.
Main Methods:
- Fabrication of an aligned electrospun PCL/SF material.
- Modification of the PCL/SF material with hUMSC-ECM to create a dual-bionic nerve graft.
- In vitro assessment of biological properties and cell interactions.
- In vivo evaluation of nerve regeneration in a rat sciatic nerve defect model.
Main Results:
- The dual-bionic material demonstrated excellent biological properties, facilitating Schwann cell adhesion and proliferation.
- The material supported subsequent axon regeneration and angiogenesis, crucial for nerve repair.
- The fabricated dual-bionic nerve graft showed comparable functional recovery to autologous nerve grafts in bridging peripheral nerve defects in rats.
Conclusions:
- A novel dual-bionic nerve regeneration material was successfully developed by combining PCL/SF with hUMSC-ECM.
- The biomimetic material effectively supports key cellular processes for nerve regeneration and shows preclinical efficacy.
- This study presents a promising new strategy for neural regeneration materials, warranting further preclinical investigation for clinical translation.
