neuroma: an INTERPHONE report from 5 countries
have been a number of research papers on acoustic
neuroma and cell phones. For more, see "Research
- Epidemiology". Another paper has been published (on-line)
on the subject. This one is part of the INTERPHONE collaboration,
and reports results from four Nordic counties and the UK. The Odds
Ratio (OR) was 0.9 for regular mobile phone use, and there was
no increased risk with duration of use, in contrast to the results
of Lonn et al. (2004), who found a somewhat raised risk for those
using a mobile phone for 10 years or more. The latter authors' results
are included in the present study. The authors state
"The study suggests that there is no substantial risk of
acoustic neuroma in the first decade after starting mobile phone
use. However, an increase in risk after longer term use or after
a longer lag period could not be ruled out".
Schoemaker MJ, Swerdlow AJ, Ahlbom A, Auvinen A, et al. Mobile phone
use and risk of acoustic neuroma: results of the Interphone case-control
study in five North European countries. British Journal of Cancer,
published on-line August 30, 2005.
review of cell phones, base stations, and cancer
The authors of a recent review of cell phones, base stations, and
"Overall, a weight-of-evidence evaluation shows that the
current evidence for a causal association between cancer and exposure
to RF energy is weak and unconvincing. However, the existing epidemiology
is limited and the possibility of epigenetic effects has not been
thoroughly evaluated, so that additional research in those areas
will be required for a more thorough assessment of a causal connection
between cancer and RF energy from mobile telecommunications".
For more on this topic, see "Research
- Epidemiology", and "Toxicological
Moulder JE, Foster KR, Erdreich LS, McNamee JP. Mobile phones, mobile
phone base stations and cancer: a review. Int J Radiat Biol 2005;81:189-203.
explanation for the heat-shock protein response to EMFs in C. elegans
group of authors had previously reported that heat-shock proteins
were produced by C. elegans as a result of exposure to electromagnetic
fields (EMFs). In the present paper the authors were able to demonstrate
by the use of magnetometry and transmission electron microscopy
that there was "compelling evidence" that C. elegans contains
magnetite, which has the ability to absorb a significant amount
of energy into the organism. They suggest that the presence of magnetite
may provide a physically plausible explanation for the heat-shock
protein responses seen in their earlier experiments.
more, see "Toxicological
experiments - Others - Heat shock response".
Cranfield CG, Dawe A, Karloukovski V, Dunin-Borkowski RE, et al.
Biogenic magnetite in the nematode caenorhabditis elegans. Proc
Biol Sci 2004;271 Suppl 6:S436-9.
Review of electromagnetic hypersensitivity
people report that they are sensitive to EMFs - that is, they suffer
a range of symptoms when exposed to weak EMFs. Most studies have
been unable to confirm the phenomenon. Rubin and colleagues carried
out a review of provocation studies and came to the conclusion that
"it has proved difficult to show under blind conditions that
exposure to EMFs can trigger these symptoms". They found 31
published experiments, of which 7 related to mobile phone hypersensitivity.
Rubin GJ, Das Munshi J, Wessely S. Electromagnetic hypersensitivity:
a systematic review of provocation studies. Psychosom Med 2005;67:224-232.
Lack of EMF effects on blood-brain barrier
have been a number of studies that have examined the effect of EMFs
on the blood-brain barrier (BBB). This barrier prevents substances
with a high molecular weight from passing from the blood into the
brain. If EMFs do alter the BBB it might be possible for toxic substances
to penetrate into brain tissues. Cosquer and colleagues did a variety
of experiments in an attempt to explore the effect of EMFs, and
could not find any evidence of BBB disruption.
For more, see "Research- Toxicological
studies - Brain function".
Cosquer B, Vasconcelos AP, Frohlich J, Cassel JC. Blood-brain barrier
and electromagnetic fields: effects of scopolamine methylbromide
on working memory after whole-body exposure to 2.45 GHz microwaves
in rats. Behav Brain Res 2005 ;161:229-237.