Cranberries Show Broad, Anti-Viral Effect in Early Testing
- From: Dave <djensen36@xxxxxxx>
- Date: Fri, 26 Oct 2007 14:39:53 -0000
Cranberries have for a number of years been a known therapy for
urinary tract infections. Doctors are now discovering that the benefit
from cranberries may even extend to protecting against viruses,
according to results of study from New York-based researchers.
A non-specific antiviral effect has been shown from Cranberries,
directed towards unrelated viral species by a commercially available
cranberry fruit juice drink (the product they used was Ocean Spray
brand, but of course these results would apply to any manufacturer).
The researchers published their work in the journal Phytomedicine, the
leading publication in the world of botanical medicines.
Researchers from St. Francis College, Mt. Sinai School of Medicine,
and New York University report that commercially available cranberry
juice neutralized these viruses: bacteriophages T2 and T4 and the
simian rotavirus SA-11. The popularity of cranberries has been
increasing due to a growing body of scientific evidence revealing the
fruit's health benefits. There has been significantly growing consumer
awareness and interest in the product. It doesn't hurt, of course,
that cranberries taste great, are easy to access, and relatively
inexpensive. Almost one third of parents in the US are now giving it
to their children, many of them because of the effect upon childhood
urinary tract infections.
France became the first country to approve a health claim for the
North American cranberry species Vaccinium macrocarpon, which states
that it can 'help reduce the adhesion of certain E.coli bacteria to
the urinary tract walls'. Perhaps there can be further health claims
down the road based on ongoing research about anti-viral activity.
In this study, the researchers exposed the viruses to cranberry,
orange, or grapefruit juices and measured the virus infectivity.
Cranberry juice was found to protect against both bacteriophage T2 and
bacteriophage T4. For the latter phage (T4) the anti-viral activities
were found to be rapid, dose-dependent, and unaffected by temperature,
occurring at four or 23 degrees Celsius.
When the researchers turned their attention to the mammalian enteric
virus, simian rotavirus SA-11, they found that a 20 per cent
suspension of cranberry juice was enough to stop the virus from
binding to the surface of cells, but a more dilute suspension (12 per
cent) was not effective. This is a very significant finding.
On the other hand, the orange and grapefruit juices reduced the viral
infectivity of T2 and T4 to 25 to 35 per cent of the control,
respectively, stated the researchers.
Further studies are of course needed to elucidate the mechanisms of
these findings and, of equal importance, to proceed to animal model
systems. It's exciting to see another natural product with the
potential for great human benefits. Let's hope that future research
proves this out.
Dave
Full text extracted from http://shamvswham.blogspot.com/
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