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In situ gelling hydrogels for conformal repair of spinal cord defects, and local delivery of BDNF after spinal cord injury

Paper ID Volume ID Publish Year Pages File Format Full-Text
11812 759 2006 8 PDF Available
Title
In situ gelling hydrogels for conformal repair of spinal cord defects, and local delivery of BDNF after spinal cord injury
Abstract

Permanent functional loss usually occurs after injury to the spinal cord. Currently, a clinical strategy to promote regeneration in the injured spinal cord does not exist. It has become evident that in order to promote regeneration, a growth permissive substrate at the injury site is critical. In this study, we report the utilization of an agarose scaffold that gels in situ, conformally filling an irregular, dorsal over-hemisection spinal cord defect in adult rats. Besides being growth permissive, the scaffolds also serve as carriers of trophic factors when embedded with BDNF releasing microtubules. We report that our thermo-reversible scaffolds are capable of supporting 3D neurite extension in vivo and are effective carriers of drug delivery vehicles for sustained local delivery of trophic factors. We demonstrate that BDNF encourages neurite growth into the scaffolds, and reduces further the minimal inflammatory response agarose gels generate in vivo as evidenced by quantitative analysis of the extent of NF-160 kDA positive neurons and axons, GFAP positive reactive astrocytes, and CS-56 positive chondroitin sulfate proteoglycan at the interface of the scaffold and host spinal cord. We suggest that these thermo-reversible scaffolds have great potential to serve as growth permissive 3D scaffolds, and to present neurotrophic factors and potentially anti-scar agents to the injury site and enhance regeneration after spinal cord injury.

Keywords
In situ gelling hydrogel; Spinal cord regeneration; BDNF delivery; CNS drug delivery; CNS scaffolds
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In situ gelling hydrogels for conformal repair of spinal cord defects, and local delivery of BDNF after spinal cord injury
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 3, January 2006, Pages 497–504
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us