title: [Effect of hypoxia inducible factor-1 alpha on vascular endothelial growth factor expression in human tongue squamous carcinoma cells (Tca8113) under hypoxia].
abstract: OBJECTIVE
  To investigate the effect of hypoxia inducible factor-1 alpha (HIF-1 alpha) on vascular endothelial growth factor (VEGF) expression in Tca8113 cells under hypoxia.
  
  
  METHODS
  The expression of the mRNA of HIF-1 alpha and VEGF in Tca8113 cells was examined by RT-PCR technique at different culture times (1/2 h, 1 h, 3 h, 6 h, 12 h, 24 h) under normoxic and hypoxic conditions.
  
  
  RESULTS
  The expression of HIF-1 alpha under hypoxia showed the trend of increasing first and then decreasing, and was higher than that of the control (normoxic group) at 6h and 12 h (P < 0.05). The expression of VEGF under hypoxia was higher than that of the control group at 1/2 h, 1 h, 3 h, 12 h, 24 h (P < 0.05). The expression of hypoxia-induced VEGF mRNA increased with the increased expression of HIF-1 alpha mRNA in the cell lines tested at the initial stage of hypoxia. But no statistical significant association was observed between HIF-1 alpha and VEGF expression within 24 h under hypoxia (rs = 0.5750, P > .005).
  
  
  CONCLUSIONS
  The increased expression of VEGF in Tca8113 cells might be mediated by multiple factors, including HIF-1 alpha.
authors.affiliation: Department of Oral Pathology, School of Stomatology, Shandong University, Jinan 250012, China.
authors.forename: Xiao-ying
authors.initials: XY
authors.lastname: Zhang
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Shan-zhen
authors.initials: SZ
authors.lastname: Sun
authors.forename: Ying
authors.initials: Y
authors.lastname: Song
authors.forename: Mei-xiang
authors.initials: MX
authors.lastname: Yang
authors.forename: Xun
authors.initials: X
authors.lastname: Qu
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000378:metabolism*; D015687:Cell Hypoxia / Q000235:genetics; D045744:Cell Line, Tumor; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics; D014062:Tongue Neoplasms / Q000235:genetics / Q000378:metabolism*; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics / Q000378:metabolism*
chemical_list: D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D012333:RNA, Messenger; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A