HeikkinenP, Kosma V-M, Alhonens L, Huuskonen H, et al. (2003):

These authors had previously reported that 50-Hz magnetic fields could enhance the growth of skin tumours in mice. They had also reported a lack of effects of mobile phone radiation on X-ray-induced tumour stimulation. In the present study they examined the effects of mobile phone radiation on skin tumour formation induced by ultraviolet (UV) radiation in mice.

Transgenic mice and their non-transgenic littermates were used. The transgenic mice had been genetically altered to make them more susceptible to tumour formation when exposed to certain chemical stimuli. There were between 45 and 49 animals in each of 3 groups, with approximately half in each group being transgenic. All three groups were exposed to UV radiation three times a week for 52 weeks. In addition one group was exposed to Digital Advanced Mobile Phone System (DAMPS)-type RFR, and the third group to Global System for Mobile (GMS)-type RFR. Each of the two RFR groups were exposed for 1.5 hours a day, five days a week, for 52 weeks at a nominal average SAR of 0.5 W/kg. The DAMPS signal is pulse-modulated at a frequency of 50 Hz, and the GMS at a frequency of 217 Hz. In addition to the three exposed groups, there was a group of twenty cage-control animals.

While UV exposure promoted the development of skin tumours, there was no effect of RFR on the number of skin tumours that developed. There was, however, a slight, but not statistically significant, acceleration in the rate of tumour development in both RFR-exposed groups. There were no effects from RFR exposure on the excretion of 6-hydroxymelatonin sulphate in the urine or on polyamine levels in the skin. Decreased production of melatonin has been suggested by some as a possible result of RFR exposure and as a possible mechanism of cancer promotion. Polyamines are chemicals that can be induced by various tumour-promoting agents.

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