title: Establishment and expression of recombinant human glial cell line-derived neurotrophic factor and TNF α receptor in human neural stem cells.
abstract: OBJECTIVE
  To investigate the interference and expression of human glial cell line-derived neurotrophic factor (hGDNF) and soluble TNF alpha (sTNFR I) receptor genes in neural stem cells and to evaluate the roles of these proteins in the genetic treatment of spinal cord injury.
  
  
  METHODS
  Full-length of GDNF cDNA (558 bp) and sTNFR I cDNA (504 bp) were inserted into the early 1 region of adenovirus genomic DNA respectively and were immediated by the human cytomegalovirus (gene promoter/enhancer). These adenoviruses were propagated in HEK293 cells via homologous recombination for 7-10 days in vivo, then they were used to infect human neural stem cells. The infection and expression of gene were tested under immunofluorescence, ELISA and Western-blot after 48 hours.
  
  
  RESULTS
  Almost all the cultured cells showed the nestin immunofluorescence positive staining, which was the characteristics of neural stem cell. A great quantity of EGFP and RFP were observed in neural stem cells, which indicated the expression of GDNF and sTNFR I. After transfection of GDNF and sTNFR I genes, many neural stem cells show GFAP and tubulin immunofluorescence positive staining, which meant that most neural stem cells differentiated into neuron at that condition.
  
  
  CONCLUSIONS
  The infective efficiency of adenovirus is greatly acceptable to neural stem cell, thus adenovirus provide a useful vector for exogenous GDNF and sTNFR I genes expressing in neural stem cells, which is useful for differentiation of neural stem cell.
authors: Department of Orthopedic Surgery, Shenzhen Guanlan People's Hospital Affiliated to Guangdong Medical College, Shenzhen 518000, China. szns120@126.com
authors: Ke-Xiong
authors: KX
authors: Zhuang
authors: Wei
authors: W
authors: Huang
authors: Bin
authors: B
authors: Yan
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D015153:Blotting, Western; D002478:Cells, Cultured; D004797:Enzyme-Linked Immunosorbent Assay; D005455:Fluorescent Antibody Technique; D015316:Genetic Therapy; D005822:Genetic Vectors; D051100:Glial Cell Line-Derived Neurotrophic Factor / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D060847:Metabolic Engineering; D058953:Neural Stem Cells / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013119:Spinal Cord Injuries / Q000628:therapy; D014162:Transfection / Q000379:methods*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000378:metabolism*
chemical_list: D051100:Glial Cell Line-Derived Neurotrophic Factor; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha