June 24, 2007
A Type of Virus Could Help Kick Drinking
New York
A single injection of a type of virus known as adenoviruses can help
give up the habit of drinking, a study indicates.
Researchers have found that rats bred to crave alcohol were found to
drink 50 percent less for more than a month after being injected
with engineered adenoviruses.
Many people in East Asia react badly to alcohol because of mutations
in the gene for aldehyde dehydrogenase. But these mutations also
reduce the risk of succumbing to alcoholism by two-thirds or more.
Aldehyde dehydrogenase is blocked by the drug disulfiram, also known
as Antabuse, which is sometimes used to help alcoholics quit the
habit, said online edition of New Scientist.
"But you have to take it (disulfiram) every day, so there is a big
problem with compliance," says researcher Amalia Sapag at the
University of Chile in Santiago.
To provide a longer-lasting effect, scientists engineered
adenoviruses to carry an "antisense" version of the aldehyde
dehydrogenase gene that blocks the production of enzyme involved in
alcohol metabolism.
A single injection reduced the enzyme's activity in rats' livers by
80 percent, Sapag revealed at the American Society of Gene Therapy
meeting in Seattle earlier this month.
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