Inhibition of XXXX cell growth by exposure to a specific time-varying electromagnetic field involves T-type calcium channels.

@entity19 @entity141 @entity1364 @entity5
Electromagnetic field (EMF) exposures affect many biological systems. The reproducibility of these effects is related to the intensity, duration, frequency, and pattern of the EMF. We have shown that exposure to a specific time-varying EMF can inhibit the growth of malignant cells. Thomas-EMF is a low-intensity, frequency-modulated (25-6 Hz) EMF pattern. Daily, 1 h, exposures to Thomas-EMF inhibited the growth of malignant cell lines including B16-BL6, MDA-MB-231, MCF-7, and HeLa cells but did not affect the growth of non-malignant cells. Thomas-EMF also inhibited B16-BL6 cell proliferation in vivo. B16-BL6 cells implanted in syngeneic C57b @entity19 and exposed daily to Thomas-EMF produced smaller @entity5 than in sham-treated controls. In vitro studies showed that exposure of malignant cells to Thomas-EMF for > 15 min promoted @entity141 influx which could be blocked by inhibitors of voltage-gated T-type @entity141 channels. Blocking @entity141 uptake also blocked Thomas-EMF-dependent inhibition of cell proliferation. Exposure to Thomas-EMF delayed cell cycle progression and altered @entity1364 expression consistent with the decrease in cell proliferation. Non-malignant cells did not show any EMF-dependent changes in @entity141 influx or cell growth. These data confirm that exposure to a specific EMF pattern can affect cellular processes and that exposure to Thomas-EMF may provide a potential anti- @entity5 therapy.
