Inhibition of cancer cell growth by exposure to a specific time-varying electromagnetic field involves T-type calcium channels
| Autor: | Stan A. Koren, Robert M. Lafrenie, Carly A. Buckner, Michael A. Persinger, Alison L. Buckner |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Male
Time Factors animal structures Magnetic Field Therapy Melanoma Experimental lcsh:Medicine Apoptosis HeLa 03 medical and health sciences Calcium Channels T-Type Mice 0302 clinical medicine Electromagnetic Fields Cell Line Tumor Animals Humans Transplantation Homologous lcsh:Science 030304 developmental biology Cell Proliferation 0303 health sciences Multidisciplinary Voltage-dependent calcium channel biology Cell growth lcsh:R T-type calcium channel biology.organism_classification 3. Good health Cell biology Transplantation Mice Inbred C57BL Microscopy Fluorescence Cell culture 030220 oncology & carcinogenesis Cancer cell MCF-7 Cells Calcium lcsh:Q Research Article HeLa Cells |
| Zdroj: | PLoS ONE, Vol 10, Iss 4, p e0124136 (2015) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | 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 mice and exposed daily to Thomas-EMF produced smaller tumours than in sham-treated controls. In vitro studies showed that exposure of malignant cells to Thomas-EMF for > 15 min promoted Ca(2+) influx which could be blocked by inhibitors of voltage-gated T-type Ca(2+) channels. Blocking Ca(2+) uptake also blocked Thomas-EMF-dependent inhibition of cell proliferation. Exposure to Thomas-EMF delayed cell cycle progression and altered cyclin expression consistent with the decrease in cell proliferation. Non-malignant cells did not show any EMF-dependent changes in Ca(2+) 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-cancer therapy. |
| Databáze: | OpenAIRE |
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