Researchers to test possible cure for the flu
Compound rids animals of symptoms
January 28, 1997
Web posted at: 11:45 p.m. EST
In this story:
WASHINGTON (CNN) -- Scientists say they will begin human
trials this year on a newly discovered compound that
has eliminated flu symptoms in test animals within a day --
and without side effects.
"We are excited about this finding, and we think it will give
people a new option for the control of influenza infections,"
says Norbert Bischofberger of Gilead Sciences Inc.
According to a report in the January 29 issue of the Journal
of the American Chemical Society, the compound -- called
GS4104 -- blocks a particular enzyme that the flu virus needs
to thrive. Without the enzyme, the virus cannot get out of
the bloodstream.
Under development for about two years, GS4104 has already
eliminated flu symptoms in animals in as little as a day.
Developers say there are virtually no side effects.
"I would stop short of saying it's a cure," Dominick Iacuzio
of the National Institutes of Health told CNN. "It appears
at this stage to be a very exciting, effective drug to limit
the infection, the spread of influenza."
If approved, the drug would be available in a pill.
Currently, two products are licensed to treat influenza A
infections, and both cause side effects and do not affect
influenza B. Vaccines are only partly effective against the
flu because of the large number of different strains of the
virus.
"Influenza infection continues to be the most serious
respiratory disease in terms of both morbidity and
mortality," said Gilead Sciences' Choung Kim.
Scientists think the flu cannot eventually outsmart GS4104
because the drug hits an enzyme that's crucial to the virus,
no matter what its mutation.
If successful, the new enzyme inhibitor will be used both as
a preventative in high-risk groups and as an oral treatment
for infection.
Clinical tests on humans will be conducted by Gilead and
pharmaceutical company Hoffman-La Roche. Final results of
those tests are probably two to three years away.
Correspondent Jeff Levine contributed to this report.
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