June 2004

RFR effects on rat embryo development

A recent study has suggested that nonthermal radiofrequency radiation (RFR) may interfere with gene expression during early gestation and result in changes in the production of proteins used in development of the skeleton. For more, see "Research - Toxicological Experiments - Others - Growth and Maturation".

Reference: Pyrpasopoulou A, Kotoula V, Cheva A, Hytiroglou P, et al. Bone morphogenetic protein expression in newborn rat kidneys after prenatal exposure to radiofrequency radiation. Bioelectromagnetics 2004;216-227.

Anesthesia affects the eye changes in animals exposed to RFR

There has been controversy about the effect of RFR on the eyes of exposed animals. Some studies have shown changes while others have not. Some authors have suggested that the different findings could be at least partly related to whether or not anesthesia had been employed in the experiment. Kojima and colleagues tested this hypothesis and found that, after exposure to high doses of RFR, changes were much greater in the eyes of rabbits that were anesthetized, compared to those not anesthetized. They also found that the temperature within the eye was much higher in anesthetized animals. For more, see "Research - Toxiclogical Experiments - Eye".

Reference: Kojima M, Hata I, Wake K, Watanabe S-i, et al. Influence of anesthesia and temperature in rabbit eyes exposed to microwaves. Bioelectromagnetics 2004;25:228-233.

A review of Lin's research

Last year James Lin received the d'Arsonval medal from the Bioelectromagnetics Society. His acceptance speech on presentation of the award is reproduced in a recent paper. It covers a wide range of Lin's microwave research studies, including experiments on snail neurons, the blood brain barrier, hyperthermia treatment for cancer, the microwave auditory phenomenon, treatment for cardiac arrythmias, and monitoring of vital signs in humans.

Reference: Lin JC. Studies on microwaves in medicine and biology: From snails to humans. Bioelectromagnetics 2004;25:146-159

Another study reports increased heat shock proteins after EMF exposure

Previously we reported on research on heat shock proteins (hsp) - see "What's New" for July 2000, November 2001, July 2002, and December 2002. Another paper reports increased levels of hsp70 in response to EMFs of the GSM 1800 frequency. This was seen in certain types of cells but not in others, and with one type of modulated signal but not another. For more, see "Research - Toxicological Experiments - Others - Heat stress response".

Reference: Czyz J, Guan K, Zeng Q, Nikolova T, et al. (2004): High frequency electromagnetic fields (GSM signals) affect gene expression levels in tumor suppressor p53-deficient embryonic stem cells. Bioelectromagnetics 25:296-307.

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