Mobile Phone Radiation 'May
Harm Brain'
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Alarming evidence that normal levels of mobile phone
radiation can harm the brain emerged from a new study today.
The research from Finland indicates that microwaves from
cellphone handsets may increase leakage of the natural
barrier that protects the brain from toxic substances.
If backed up by studies on human volunteers, the findings
will send shock waves through the mobile phone industry.
An animal study by a French team is already believed to have
lent further weight to the evidence, by showing that mobile
phone radiation can promote leakage of the blood-brain
barrier in rats.
Results from both investigations are due to be presented at
a conference in Canada this month.
The Scandinavian study was led by Professor Darius
Leszczynski, of the Radiation and Nuclear Safety Authority
in Finland.
Cells from blood vessel walls in the brain were placed in
culture dishes and subjected to mobile phone radiation in
the laboratory.
At a strength of two watts per kilogram, the radiation
intensity was the maximum allowed internationally for mobile
phones.
After an hour's exposure biochemical changes were seen in
the cells which could alter the activity of about 400
proteins.
In particular one enzyme, called HSP 27, which helps to
regulate blood-brain barrier permeability, was affected."If
the same thing happened in real life, in people, then it
could affect blood-brain barrier permeability by increasing
it," said Professor Leszczynski.
As a result, molecules that cause damage to neurons may be
allowed to invade brain tissue.
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