Measurement of DNA Damage in Mammalian Cells Exposed In Vitro to Radiofrequency Fields at SARs of 3–5 W/kg

Abstract Li, L., Bisht, K. S., LaGroye, I., Zhang, P., Straube, W. L., Moros, E. G. and Roti Roti, J. L. Measurement of DNA Damage in Mammalian Cells Exposed In Vitro to Radiofrequency Fields at SARs of 3–5 W/kg. Radiat. Res. 156, 328–332 (2001). In the present study, we determined whether exposure of mammalian cells to 3.2–5.1 W/kg specific absorption rate (SAR) radiofrequency fields could induce DNA damage in murine C3H 10T½ fibroblasts. Cell cultures were exposed to 847.74 MHz code-division multiple access (CDMA) and 835.62 frequency-division multiple access (FDMA) modulated radiations in radial transmission line (RTL) irradiators in which the temperature was regulated to 37.0 ± 0.3°C. Using the alkaline comet assay to measure DNA damage, we found no statistically significant differences in either comet moment or comet length between sham-exposed cells and those exposed for 2, 4 or 24 h to CDMA or FDMA radiations in either exponentially growing or plateau-phase cells. Further, a 4-h incubation after the 2-h exposure resulted in no significant changes in comet moment or comet length. Our results show that exposure of cultured C3H 10T½ cells at 37°C CDMA or FDMA at SAR values of up to 5.1 W/kg did not induce measurable DNA damage.

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