Ex vivo non-viral vector-mediated neurotrophin-3 gene transfer to olfactory ensheathing glia: effects on axonal regeneration and functional recovery after implantation in rats with spinal cord injury / 神经科学通报·英文版
Neuroscience Bulletin
;
(6): 57-65, 2008.
Article
in English
| WPRIM
| ID: wpr-264696
ABSTRACT
<p><b>OBJECTIVE</b>Combine olfactory ensheathing glia (OEG) implantation with ex vivo non-viral vector-based neurotrophin-3 (NT-3) gene therapy in attempting to enhance regeneration after thoracic spinal cord injury (SCI).</p><p><b>METHODS</b>Primary OEG were transfected with cationic liposome-mediated recombinant plasmid pcDNA3.1(+)-NT3 and subsequently implanted into adult Wistar rats directly after the thoracic spinal cord (T9) contusion by the New York University impactor. The animals in 3 different groups received 4x10(5) OEG transfected with pcDNA3.1(+)-NT3 or pcDNA3.1(+) plasmids, or the OEGs without any plasmid transfection, respectively; the fourth group was untreated group, in which no OEG was implanted.</p><p><b>RESULTS</b>NT-3 production was seen increased both ex vivo and in vivo in pcDNA3.1(+)-NT3 transfected OEGs. Three months after implantation of NT-3-transfected OEGs, behavioral analysis revealed that the hindlimb function of SCI rats was improved. All spinal cords were filled with regenerated neurofilament-positive axons. Retrograde tracing revealed enhanced regenerative axonal sprouting.</p><p><b>CONCLUSION</b>Non-viral vector-mediated genetic engineering of OEG was safe and more effective in producing NT-3 and promoting axonal outgrowth followed by enhancing SCI recovery in rats.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Olfactory Bulb
/
Paralysis
/
Plasmids
/
Spinal Cord Injuries
/
Therapeutics
/
Transplantation
/
DNA, Recombinant
/
Genetic Therapy
/
Up-Regulation
/
Cells, Cultured
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Neuroscience Bulletin
Year:
2008
Type:
Article
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