Comparison of Hsps expression after radio-frequency field exposure in three human glioma cell lines.
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.
Ding
Gui-Rong
GR
Department of Radiation Medicine, Faculty of Preventive Medicine, Fourth Military Medical University, Xi 'an 710032, Shaanxi, China.
Wang
Xiao-Wu
XW
Li
Kang-Chu
KC
Qiu
Lian-Bo
LB
Xu
Sheng-Long
SL
Tan
Juan
J
Guo
Guo-Zhen
GZ
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
D006360:Heat-Shock Proteins; D009363:Neoplasm Proteins