title: Reimplantation combined with transplantation of transgenic neural stem cells for treatment of brachial plexus root avulsion.
abstract: OBJECTIVE
  To explore a new method to treat brachial plexus root avulsion experimentally by reimplantation combined with transplantation of neural stem cells (NSCs) modified by neurotrophin-3 gene (NT-3).
  
  
  METHODS
  The total RNA was extracted from neonatal rat striatum and the NT-3 cDNA was obtained by reverse transcription and amplified by polymerase chain reaction. The NT-3 gene was transferred into NSCs via the pLEGFP-C1, an expression plasmid vectors. The untransfected NSCs, the pLEGFP-C1 treated NSCs, and the pLEGFP-C1-NT-3 treated NSCs were transplanted into corresponding spinal cord segment with brachial plexus root avulsion. The survival, differentiation, and migration of the transplanted cells were determined under confocal laser scanning microscope or by immunohistochemistry method. The nerve regeneration was evaluated by gross observation, electrophysiological examination and reverse horseradish peroxidase tracing.
  
  
  RESULTS
  The NT-3 gene was successfully amplified and transferred into neural stem cells via the plasmid vectors. The transplanted cells survived, differentiated, and migrated and NT-3 was expressed within the spinal cord. The animals regained some muscle strength which was less than 3-degree muscular strength according to the British Medical Research Council (BMRC) evaluating system. The results of electrophysiological examination and reverse horseradish peroxidase tracing were superior in the pLEGFP-C1-NT-3 group to the NSCs untransfected group or the pLEGFP-C1 group.
  
  
  CONCLUSIONS
  Transplantation of NSCs modified by NT-3 gene combined with reimplantation is a relatively effective way to treat brachial plexus root avulsion experimentally. It still need further study to improve the results.
authors.affiliation: Department of Hand Surgery, First Hospital of Jilin University, Changchun 130021, China. yfchenlei@tom.com
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Lai-jin
authors.initials: LJ
authors.lastname: Lu
authors.forename: Xiao-ting
authors.initials: XT
authors.lastname: Meng
authors.forename: Dong
authors.initials: D
authors.lastname: Chen
authors.forename: Zhi-xin
authors.initials: ZX
authors.lastname: Zhang
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
mesh_terms: D000818:Animals; D001917:Brachial Plexus / Q000293:injuries*; D020933:Neurotrophin 3 / Q000235:genetics; D011843:Radiculopathy / Q000601:surgery*; D051381:Rats; D012092:Replantation; D033581:Stem Cell Transplantation; D014162:Transfection
chemical_list: D020933:Neurotrophin 3