Analysis of the cellular stress response in MCF10A cells exposed to combined radio frequency radiation

Han Na Kim, Na Kyung Han, Mi Na Hong, Sung Gil Chi, Yun Sil Lee, Taehong Kim, Jeong Ki Pack, Hyung Do Choi, Nam Kim, Jae Seon Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Exposure to environmental stressors can be measured by monitoring the cellular stress response in target cells. Here, we used the cellular stress response to investigate whether single or combined radio frequency (RF) radiation could induce stress response in human cells. Cellular stress responses in MCF10A human breast epithelial cells were characterized after exposure to 4 h of RF radiation [code division multiple access (CDMA) or CDMA plus wideband CDMA (WCDMA)] or 2 h RF radiation on 3 consecutive days. Specific absorption rate (SAR) was 4.0 W/kg for CDMA signal alone exposure and 2.0 W/kg each, 4.0 W/kg in total for combined CDMA plus WCDMA signals. Expression levels and phosphorylation states of specific heat shock proteins (HSPs) and mitogen-activated protein kinases (MAPKs) were analyzed by Western blot. It was found that HSP27 and ERK1/2 phosphorylations are the most sensitive markers of the stress response in MCF10A cells exposed to heat shock or ionizing radiation. Using these markers, we demonstrated that neither one-time nor repeated single (CDMA alone) or combined (CDMA plus WCDMA) RF radiation exposure significantly altered HSP27 and ERK1/2 phosphorylations in MCF10A cells (p > 0.05). The lack of a statistically significant alteration in HSP27 and ERK1/2 phosphorylations suggests that single or combined RF radiation exposure did not elicit activation of HSP27 and ERK1/2 in MCF10A cells.

Original languageEnglish
Pages (from-to)176-183
Number of pages8
JournalJournal of Radiation Research
Volume53
Issue number2
DOIs
Publication statusPublished - 2012 Mar

Keywords

  • ERK1/2
  • HSP27
  • MCF10A cells
  • RF radiation

ASJC Scopus subject areas

  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Health, Toxicology and Mutagenesis

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