title: Comparison of Hsps expression after radio-frequency field exposure in three human glioma cell lines.
abstract: OBJECTIVE
  To investigate and compare the effect of radio-frequency (RF) field exposure on expression of heat shock proteins (Hsps) in three human glioma cell lines (MO54, A172, and T98).
  
  
  METHODS
  Cells were exposed to sham or 1950 MHz continuous-wave for 1 h. Specific absorption rates (SARs) were 1 and 10 W/kg. Localization and expression of Hsp27 and phosphorylated Hsp27 ((78) Ser) (p-Hsp27) were examined by immunocytochemistry. Expression levels of Hsp27, p-Hs27, and Hsp70 were determined by Western blotting.
  
  
  RESULTS
  The Hsp27 was primarily located within the cytoplasm, p-Hsp27 in both cytoplasm and nuclei of MO54, A172, and T98 cells. RF field exposure did not affect the distribution or expression of Hsp27. In addition, Western blotting showed no significant differences in protein expression of Hsp27 or Hsp70 between sham- and RF field-exposed cells at a SAR of 1 W/kg and 10 W/kg for 1 h in three cells lines. Exposure to RF field at a SAR of 10 W/kg for 1 h slightly decreased the protein level of phosphorylated Hsp27 in MO54 cells.
  
  
  CONCLUSIONS
  The 1950 MHz RF field has only little or no apparent effect on Hsp70 and Hsp27 expression in MO54, A172, and T98 cells.
authors.affiliation: Department of Radiation Medicine, Faculty of Preventive Medicine, Fourth Military Medical University, Xi 'an 710032, Shaanxi, China.
authors.forename: Gui-Rong
authors.initials: GR
authors.lastname: Ding
authors.forename: Xiao-Wu
authors.initials: XW
authors.lastname: Wang
authors.forename: Kang-Chu
authors.initials: KC
authors.lastname: Li
authors.forename: Lian-Bo
authors.initials: LB
authors.lastname: Qiu
authors.forename: Sheng-Long
authors.initials: SL
authors.lastname: Xu
authors.forename: Juan
authors.initials: J
authors.lastname: Tan
authors.forename: Guo-Zhen
authors.initials: GZ
authors.lastname: Guo
mesh_terms: D045744:Cell Line, Tumor; D015972:Gene Expression Regulation, Neoplastic / Q000528:radiation effects*; D005910:Glioma; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009457:Neuroglia / Q000528:radiation effects*; D021381:Protein Transport
chemical_list: D006360:Heat-Shock Proteins; D009363:Neoplasm Proteins