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Accepted (AM)Open Access (License Unspecified), Open
Journal article
In vitro analysis of PNIPAAm-PEG, a novel, injectable scaffold for spinal cord repair
Acta biomaterialia, v 5(4), pp 1046-1055
01 May 2009
PMID: 19054721
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Nervous tissue engineering in combination with other therapeutic strategies is an emerging trend for the treatment of different CNS disorders and injuries. We propose to use poly(N-isopropylacrylamide)-co-poly(ethylene glycol) (PNIPAAm-PEG) as a minimally invasive, injectable scaffold platform for the repair of spinal cord injury (SCI). The scaffold allows cell attachment, and provides mechanical support and a sustained release of neurotrophins. In order to use PNIPAAm-PEG as an injectable scaffold for treatment of SCI, it must maintain its mass and volume over time in physiological conditions, To provide mechanical support at the injury site, it is also critical that the engineered scaffold matches the compressive modulus of the native neuronal tissue. This study focused on studying the ability of the scaffold to release bioactive neurotrophins and matching the material properties to those of the native neuronal tissue. We found that the release of both BDNF and NT-3 was sustained for up to 4 weeks, with a minimal burst exhibited for both neurotrophins. The bioactivity of the released NT-3 and BDNF was confirmed after 4 weeks. In addition, our results show that the PNIPAAm-PEG scaffold can be designed to match the desired mechanical properties of the native neuronal tissue, with a compressive modulus in the 3-5 kPa range. The scaffold was also compatible with bone marrow stromal cells, allowing their survival and attachment for up to 31 days. These results indicate that PNIPAAm-PEG is a promising multifunctional scaffold for the treatment of SCI. (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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Details
- Title
- In vitro analysis of PNIPAAm-PEG, a novel, injectable scaffold for spinal cord repair
- Creators
- Noelle Comolli - Drexel UniversityBirgit Neuhuber - Drexel UniversityItzhak Fischer - Drexel UniversityAnthony Lowman - Drexel University
- Publication Details
- Acta biomaterialia, v 5(4), pp 1046-1055
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- R21 NS061307-02; R21 NS061307 / NINDS NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Neurological Disorders & Stroke (NINDS) R21NS061307 / NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Neurological Disorders & Stroke (NINDS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Neurobiology and Anatomy
- Web of Science ID
- WOS:000266017200010
- Scopus ID
- 2-s2.0-64249159628
- Other Identifier
- 991019168037304721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials