PITTSBURGH -- Vaccinations
protect millions of people from common diseases
like chicken pox, measles and flu, but is it
possible to prevent cancer with a vaccine?
Researchers at the Hillman Cancer Center in
Shadyside, Pa., think so.
In
fact, one doctor there is already using a vaccine
to treat malignant melanoma.
Nancy
Cutright, a West Virginia teacher, loves boats and
the ocean. She has spent a lot of time in the sun.
Cutright had a mole on her back for years and had
it checked once years ago. She was told it was
nothing to worry about.
She
decided to have it checked again after a casual
remark from a stranger.
"I was
at the pool and a lady that was a nurse said you
need to get that checked," Cutright said.
Cutright got the mole checked and, in 1996, she
found out it was a malignant melanoma.
The
mole was removed, and Cutright said everything
looked normal until five years later.
"In
2001, I had a lymph node pop up under my arm. They
biopsied it and found that melanoma was contained
in the lymph node," Cutright said.
Cutright was treated with interferon, but a year
later, the melanoma was back in lymph nodes under
her other arm.
Needing
more aggressive treatment, she went to Dr. John
Kirkwood, director of the melanoma program at the
Hillman Cancer Center.
Kirkwood -- a leader in the research and treatment
of malignant melanoma -- is now treating some of
his patients with a melanoma vaccine he developed.
"After
literally 25 years of hard work with many, many
drugs, it was about six years ago that we hit the
first pay dirt. As it were, we discovered we could
prevent relapse, prevent death and prolong
survival in people who had melanoma," Kirkwood
said.
An
estimated 8,000 people die every year from
melanoma. Sun exposure is the chief cause of the
cancer.
Cutright has been getting the vaccine since July
2002. Every two weeks, she drives 580 miles round
trip from her home to the Hillman Cancer Center.
Once
she arrives, her vaccines are mixed in the lab and
she gets them in six injections. Then she's back
on the road home and has very few side effects.
"When I
look at some of the other treatments some of the
people have and see what they go through, it gives
me strength. It's a piece of cake," Cutright said.
Cutright feels lucky that this option is available
to her.
"It's
cutting edge. They are trying to teach my body to
see or recognize a melanoma and rally and fight
and destroy it. I hope it's a springboard for all
types of cancers," Cutright said.
That's
also the hope of Dr. Olivera Finn of the Hillman
Center.
Vaccines developed by Finn and her researchers
have been used in a small number of patients with
advanced, untreatable cancers.
"Right
now, we are using vaccines and testing vaccines in
people who already have cancer, and we're doing
that and hope to slow down the disease progression
or prevent recurrence," Finn said.
So far
she is encouraged by the results.
"Ten to
20 percent of patients respond very well to the
vaccine -- meaning that the disease slows down.
They live a little longer and, more importantly,
the vaccine is not toxic so they have no side
effects," Finn said.
Right
now, the vaccines are only given to people who
already have cancer, but Finn thinks that will
change in the not so distant future.
"A
vaccine that can induce an immune response and can
prevent disease recurrence without any toxicity is
very, very close at hand. The hope is that we can
prepare something that can be put in a vial and
sit on the doctor's shelf and be administered to
healthy individuals, so that when they are older
they don't develop cancer," Finn said.
Kirkwood also feels wider use of cancer vaccines
is not far off.
"Maybe
not within two or three years, but certainly
within five to 10 years. Do we see a time in the
future when those vaccines can prevent the origin
of the disease? That is the goal," Kirkwood said.
As for
Cutright, she'll continue getting the vaccine
until July. Her most recent tests show the cancer
is gone.
"It was
an answer to my prayers; you could even say it was
a miracle," Cutright said.
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