Broccoli
'Pill' Eyed in Cancer Fight
Excerpt
by Amanda Gardner,
HealthScoutNews
(HealthScoutNews) -- Broccoli pills may be in our future.
Researchers have developed a new synthetic compound, derived
from a known anti-cancer agent found in broccoli, that they say
could become a pill to prevent breast cancer, and, possibly, other
forms as well.
Finding compounds to prevent cancer is a Holy Grail of medical
research. Right now, Tamoxifen is the only drug approved by the
FDA to prevent breast cancer, but it is effective only in women
whose cancers are estrogen-dependent. The new compound, called
oxomate, could have a much wider application.
In a test study, female rats who had been given carcinogens
and who were fed oxomate had up to a 50 percent reduction in the
number of breast tumors compared with similarly treated rats given
a regular diet.
"It definitely has a lot of potential," says Jerome
Kosmeder, lead author of the study, which was presented last night
at the annual meeting of the American Chemical Society in Boston.
"The public knows that prevention is better than trying to
treat something. Right now the government is trying to do what
it can, but I think private industry needs to step in and take
charge."
Other experts are not so sure about this new finding. "You
never know when something might be really great. The problem is
it has never been tried in a human," says Dr. Alan J. Stolier,
medical director of the Lieselotte Tansey Breast Center at the
Ochsner Clinic Foundation in New Orleans. "There has not
been one human test on it. I'm amazed at how much press something
can get that was given to rats."
Kosmeder, who is also a research assistant professor at the
College of Pharmacy at the University of Illinois at Chicago,
estimates that a pill could be ready for human trials in seven
to 10 years.
Researchers at Johns Hopkins University in Baltimore had already
identified sulforaphane as a natural cancer-preventing agent found
in broccoli and other cruciferous vegetables such as cabbage and
Brussels sprouts. Sulforaphane, however, is toxic in high doses
and is difficult and expensive to produce.
The new compound, oxomate, acts the same way as its natural
counterpart sulforaphane, but has been engineered to be less toxic.
In tests on cultured liver cells, oxomate was seven times less
toxic than sulforaphane. Oxomate can also be produced synthetically
in large quantities.
Like sulforaphane, oxomate increases the number of Phase II
(detoxification) enzymes needed to protect cells from damage by
carcinogens.
"Phase II enzymes are sort of our body's protection against
internal and external compounds that can damage DNA," Kosmeder
says. "This compound and that in broccoli work by elevating
these enzyme levels beyond what would abnormally be there. They're
boosting your own body's defense against carcinogens."
Basically, oxomate prevents normal cells from becoming cancer
cells by blocking the action of carcinogens. Though the researchers
so far only have results in breast cancer, they think oxomate
may have a role to play with colon, skin and lung cancer.
The idea would be to give oxomate in pill form to people who
have been exposed to carcinogens or who, for whatever reason,
have a predisposition to the disease. "You take a vitamin
every day, and this is the same idea," Kosmeder says. "You
want to keep up your natural enzyme levels to keep protecting
your body."
Even though prevention is a huge area of medical research, it
is also a time-consuming expensive one. Trials for drugs to treat
diseases may take one to two years, whereas trials to test preventives
can take five to 10 years to complete.
Kosmeder and his colleagues are trying to find ways to shorten
that time by locating biochemical markers to measure the action
of oxomate.
"It is very, very difficult to prove that something prevents
something from happening," Stolier says.
And he knows from experience. "Many years ago when I had
a lab, I learned that you could take a mouse or rat, inject the
solution of destroyed cancer cells into the mouse and then in
a few weeks that mouse wouldn't get that kind of cancer. You can
immunize the mouse against cancer, but we haven't done that to
humans. We've tried. It just doesn't seem to work."
What To Do
For more information on breast cancer prevention and treatment,
visit the
National Cancer Institute or the
Food and Drug Administration.
Reference
Source 101
For more information on how to prevent other diseases, use
PreventDisease.com's "Quick
Prevention Resources".
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