This study investigated the hypothesis that exposure to mobile phone-type radiation causes a nonthermal heat shock protein (HSP) response in human peripheral blood lymphocytes and monocytes".
Blood, collected from
volunteers, was exposed to 900 MHz radiation. Three different exposure
conditions were investigated:
In each case sham-exposed cells were part of the experiment. Positive (heat-stressed at 42°C) and negative (kept at 37°C) control groups were incubated simultaneously in the same incubator.
Heat cause an increase in the number of cells expressing stress proteins (HSP70, HSP27), measures using flow cytometry, and this increase was dependent on time. However, no statistically significant difference was detected in the number of cells expressing stress proteins after RF-field exposure.