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Koppes RA, Park S, Hood T, Jia X, Abdolrahim Poorheravi N, Achyuta AH, Fink Y, Anikeeva P. Thermally drawn fibers as nerve guidance scaffolds. Biomaterials 2015; 81:27-35. [PMID: 26717246 DOI: 10.1016/j.biomaterials.2015.11.063] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/25/2015] [Accepted: 11/29/2015] [Indexed: 01/08/2023]
Abstract
Synthetic neural scaffolds hold promise to eventually replace nerve autografts for tissue repair following peripheral nerve injury. Despite substantial evidence for the influence of scaffold geometry and dimensions on the rate of axonal growth, systematic evaluation of these parameters remains a challenge due to limitations in materials processing. We have employed fiber drawing to engineer a wide spectrum of polymer-based neural scaffolds with varied geometries and core sizes. Using isolated whole dorsal root ganglia as an in vitro model system we have identified key features enhancing nerve growth within these fiber scaffolds. Our approach enabled straightforward integration of microscopic topography at the scale of nerve fascicles within the scaffold cores, which led to accelerated Schwann cell migration, as well as neurite growth and alignment. Our findings indicate that fiber drawing provides a scalable and versatile strategy for producing nerve guidance channels capable of controlling direction and accelerating the rate of axonal growth.
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Affiliation(s)
- Ryan A Koppes
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA
| | - Seongjun Park
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Tiffany Hood
- Department of Bioengineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xiaoting Jia
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Negin Abdolrahim Poorheravi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | | | - Yoel Fink
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Polina Anikeeva
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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Zhao L, Qu W, Wu Y, Ma H, Jiang H. Dorsal root ganglion-derived Schwann cells combined with poly(lactic-co-glycolic acid)/chitosan conduits for the repair of sciatic nerve defects in rats. Neural Regen Res 2015; 9:1961-7. [PMID: 25598778 PMCID: PMC4283278 DOI: 10.4103/1673-5374.145374] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2014] [Indexed: 01/09/2023] Open
Abstract
Schwann cells, nerve regeneration promoters in peripheral nerve tissue engineering, can be used to repair both the peripheral and central nervous systems. However, isolation and purification of Schwann cells are complicated by contamination with fibroblasts. Current reported measures are mainly limited by either high cost or complicated procedures with low cell yields or purity. In this study, we collected dorsal root ganglia from neonatal rats from which we obtained highly purified Schwann cells using serum-free melanocyte culture medium. The purity of Schwann cells (> 95%) using our method was higher than that using standard medium containing fetal bovine serum. The obtained Schwann cells were implanted into poly(lactic-co-glycolic acid)/chitosan conduits to repair 10-mm sciatic nerve defects in rats. Results showed that axonal diameter and area were significantly increased and motor functions were obviously improved in the rat sciatic nerve tissue. Experimental findings suggest that serum-free melanocyte culture medium is conducive to purify Schwann cells and poly(lactic-co-glycolic acid)/chitosan nerve conduits combined with Schwann cells contribute to restore sciatic nerve defects.
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Affiliation(s)
- Li Zhao
- Department of Anesthesiology, Heji Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi Province, China
| | - Wei Qu
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Yuxuan Wu
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Hao Ma
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Huajun Jiang
- Department of Orthopedics, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
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