FWD: How cell phones can cause cancer
brian carroll <email@example.com>
Tue, 26 Jun 2001 19:00:01 -0800
Study: How cell phones can cause cancer
By Rupert Goodwins, ZDNet (UK)
June 25, 2001 8:21 AM PT
Researchers in Australia have reported one of the first scientific
hypotheses that normal mobile phone use can lead to cancer. The
research group, lead by radiation expert Dr Peter French,
principal scientific officer at the Centre for Immunology Research
at St Vincent's Hospital in Sydney, said that mobile phone
frequencies well below current safety levels could stress cells in
a way that has been shown to increased susceptibility to cancer.
The paper, published in the June issue of the science journal
Differentiation, says that repeated exposure to mobile phone
radiation acts as a repetitive stress, leading to continuous
manufacture of heat shock proteins within cells.
Heat shock proteins are always present in cells at a low level,
but are manufactured in larger amounts when the cell is stressed
by heat or other environmental factors. They repair other proteins
that are adversely affected by the conditions, and are part of the
cell's normal reaction to stress. However, if they are produced
too often or for too long, they are known to initiate cancer and
increase resistance to anti-cancer drugs.
No link shown
Dr. French emphasised that no link has yet been shown between the
specific biological effects of mobile phone radiation and cancer,
but that there was now a theoretical framework for such an effect
that could be investigated. His previous work has included showing
that the production of histamine, a chemical involved in asthma,
can be nearly doubled after exposure to cellular frequencies.
To date, most safety levels have been set on the assumption that
damage is caused by heating effects of radio waves in human
tissue, much higher than the levels at which Dr French claims heat
shock proteins are triggered.
His co-authors include Professor Ron Penny, the director of the
Centre and one of Australia's leading experts in the cellular
effects of HIV, and Professor David McKenzie, head of applied
physics at Sydney University.
electromagnetism / infrastructure / civilization