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• W2088490610 abstract "Regeneration of endogenous axons through a Schwann cell (SC)-seeded scaffold implant has been demonstrated in the transected rat spinal cord. The formation of a cellular lining in the scaffold channel may limit the degree of axonal regeneration. Spinal cords of adult rats were transected and implanted with the SC-loaded polylactic co-glycollic acid (PLGA) scaffold implants containing seven parallel-aligned channels, either 450 μm (n = 19) or 660 μm in diameter (n = 14). Animals were sacrificed after 1, 2 and 3 months. Immunohistochemistry for neurofilament expression was performed. The cross-sectional area of fibrous tissue and regenerative core was calculated. We found that the 450 μm scaffolds had significantly greater axon fibers per channel at the 1 month (186 ± 37) and 3 month (78 ± 11) endpoints than the 660 μm scaffolds (90 ± 19 and 40 ± 6, respectively) (p = 0.0164 and 0.0149, respectively). The difference in the area of fibrous rim between the 450 and 660 μm channels was most pronounced at the 1 month endpoint, at 28,046 ± 6551 and 58,633 ± 7063 μm2, respectively (p = 0.0105). Our study suggests that fabricating scaffolds with smaller diameter channels promotes greater regeneration over larger diameter channels. Axonal regeneration was reduced in the larger channels due to the generation of a large fibrous rim. Optimization of this scaffold environment establishes a platform for future studies of the effects of cell types, trophic factors or pharmacological agents on the regenerative capacity of the injured spinal cord." @default.
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• W2088490610 date "2009-09-01" @default.
• W2088490610 modified "2023-10-07" @default.
• W2088490610 title "Relationship between scaffold channel diameter and number of regenerating axons in the transected rat spinal cord" @default.
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• W2088490610 doi "https://doi.org/10.1016/j.actbio.2009.03.021" @default.
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