3768 Pedaling for a Cure
HOUSTON (Ivanhoe Newswire) – Five years ago, Leslie Trudeau’s world came crashing down. At just 22
years old, her son Taylor lost his battle with leukemia.
“He was the bravest person I know. He never complained. He never said, ‘Why me?’” Trudeau told
Ivanhoe. “I personally don’t want any family to go through what we went through.”
That’s why Trudeau is pedaling for a cure. Her son’s fraternity brothers in Pi Kappa Alpha at the
University of New Hampshire created Cycle for Life, a fundraising event held on college campuses across
the country. Participants pay $10 to ride a stationary bike for half an hour; 100 percent of the donations
go towards cancer research.
And so far it’s paying off.
Last year, Cycle for Life granted Stem Cell Therapist Dean Anthony Lee, MD, PhD, at MD Anderson
Cancer Center, $250,000 to start a phase I clinical trial on a new leukemia treatment using immune cells
donated by a related family member, called natural killer cells or NK cells.
“Their job is to try to kill cancer,” Dr. Lee told Ivanhoe.
But chemo not only attacks the cancer, it also kills all the NK cells. Dr. Lee has found a way to grow more
NK cells in mass. Using blood from a donor, he takes the NK cells, multiplies them by 30,000 times their
original amount and injects them into the patient.
“NK cells job are really not to identify a specific target, but really to look at this combination of what’s
good and what’s bad about a cell,” Dr. Lee said. “And if a cell has an overall balance of things that look
dangerous, that’s when it decides to kill the cell.”
IT’S A BEACON OF HOPE FOR TAYLOR’S FRIENDS AND FAMILY.
“It’s almost like the phoenix, you know? He passed away but something greater came out of his cause,”
Demetri Kouloheras, Taylor’s friend, told Ivanhoe.
“He’d be amazed. He would go, ‘Really? For me?’” Trudeau said.
For more information about the organization and Dr. Lee’s clinical trial, visit taylorcycleforlife.org.
MEDICAL BREAKTHROUGHS
RESEARCH SUMMARY
TOPIC:
REPORT:
PEDALING FOR A CURE
MB # 3768
BACKGROUND: Leukemia is cancer that starts in blood-forming tissue such as bone marrow
and causes large numbers of blood cells to be produced and enter the bloodstream. Most
normal blood cells develop from cells in the bone marrow, called stem cells. Bone marrow is the
soft material in the center of most bones. Stem cells will develop into different kinds of blood
cells each with a specific job. White blood cells fight infection. Red blood cells carry oxygen to
tissue throughout the body. Platelets help form blood clots that control bleeding. These cells are
made from stem cells as the body needs them. Most blood cells mature in the bone marrow.
Then they will move into the blood vessels. When someone has leukemia, their bone marrow
makes abnormal white blood cells, called leukemia cells. (Source: www.cancer.gov)
RISK FACTORS: The exact cause of leukemia is unknown. Researchers do know that there
are certain risk factors that increase the likelihood of developing the disease. They include:
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Radiation: people exposed to high levels are more likely to get acute myeloid, chronic
myeloid, or acute lymphocytic leukemia.
Smoking: cigarettes increase the risk of acute myeloid leukemia.
Chemotherapy: cancer patients treated with certain types of drugs sometimes can get
acute myeloid leukemia or acute lymphocytic leukemia.
Inherited Diseases: Down syndrome, blood disorders, Human T-cell leukemia virus type
1, family history of leukemia, and other inherited diseases increase the risk of developing
acute leukemia. (Source: www.cancer.gov)
NEW TECHNOLOGY: Dr. Dean Anthony Lee, at MD Anderson Cancer Center, is testing a new
way to treat leukemia. He’s studying something called natural killer (NK) cells, which essentially
look at cells and determine whether they are considered good or bad. If they encounter a bad
cell, they kill it. But because these cells originate in the bone marrow, in patients with leukemia
their production is stopped or slowed down. Although they’ve been known about since the
1970s, not much research has been done on their effect. Dr. Lee is currently growing large
amounts of these cells, in an effort to determine if they can be used in a treatment or therapy.
(Source: Dr. Dean Anthony Lee)
FOR MORE INFORMATION, PLEASE CONTACT:
Dean Anthony Lee, MD, PhD
dalee@mdanderson.org
Office: 713-563-5404
If this story or any other Ivanhoe story has impacted your life or prompted you or
someone you know to seek or change treatments, please let us know by contacting
Marjorie Bekaert Thomas at mthomas@ivanhoe.com
Dean A. Lee, M.D., Ph.D.
Dean A. Lee, M.D., Ph.D., Associate Professor in the Division of Pediatrics and Cell
Therapy Section at the University of Texas MD Anderson Cancer Center, talks about a
potential new way for doctors to treat cancer.
What are in NK cells?
Dr. Lee: So your immune system is really split into two halves. If you think about it as
like defending the country: we have this mobilized army and Special Forces and then
we have border patrol. I think NK cells are the side that’s more like border patrol.
There’s a lot of emphasis put on T cells and B cells in the last 15 to 20 years which are
more specific. Like the army and Special Forces, they’re going after specific targets. NK
cells’ job are really not to identify a specific target but really to look at this combination
of what’s good and what’s bad about a cell and if the cell has an overall balance of
things that look dangerous, that’s when it decides to kill the cell.
What happens to NK cells in a person with leukemia?
Dr. Lee: There are several things that happen to NK cells in patients with leukemia.
First of all, NK cells are made in your bone marrow and when leukemia starts to
overtake the bone marrow you just can’t make any more. NK cells are, we think,
relatively short-lived, most of the time probably only three to four weeks. So you’re
going to get some of the numbers go down. But also leukemia actually has several
factors that suppress NK cells and make the NK cells a little bit stunned and not able to
do their job while they’re in that right environment.
What role do NK cells play in the survival of the patient?
Dr. Lee: Depending on whether you look at NK cell numbers or the genes that the NK
cells have, or whether you’re treating cancer or getting a bone marrow transplant, the
NK cells play a different role in each of those different settings. But what we do know
now is that certain genes in NK cells can actually make you more or less likely to get
leukemia in the first place. They can make you more or less likely to respond to therapy
and the numbers that you have and the genes that are present in NK cells can predict
whether or not you respond to a transplant as part of therapy.
How does chemo affect natural killer cells in leukemia patients?
Dr. Lee: So chemotherapy is another way that we actually hurt NK cells for patients with
leukemia. NK cells happen to be very sensitive to both chemotherapy and to some of
the steroid drugs that we use for some leukemias. So after each cycle of chemotherapy
you’ve essentially wiped out all of the NK cells you have admitted they have to regrow.
So the various cells we have whose job is to try to kill cancer, we’re actually affecting
with the chemotherapy we give.
Can you tell me about your lab?
Dr. Lee: Our research and lab on NK cells really started with trying to understand
whether or not we can just get them to grow, can we get enough of them to actually do
therapy in the clinic. That was a finding that we had about five or six years ago. Now
that we can actually generate lots of NK cells, the lab has focused on multiple ways of
making those cells more effective or finding specific varieties of NK cells that are the
best for an individual cancer.
What do you do with the cells once you’ve grown them?
Dr. Lee: What we do with these cells after we grow them is really in two parts. One is
that, although we’ve known about NK cells since the 1970’s, we haven’t been able to
really study them very well because we couldn’t grow large enough numbers of them to
really do all of those tests. So in the lab we’ll grow large numbers of these cells and
then we have lots of different ways that we can test them and look at different versions
of NK cells, test what drugs affect them; those kinds of things in the lab. In the clinic we
developed a way that we can grow NK cells that can actually be infused in to patients.
And how we can infuse those in to patients is really what’s under investigation now with
these trials. There’s potential for using them as part of a transplant and making a
transplant more effective. There’s potential for infusing them right after chemotherapy to
make the chemotherapy more effective or combining them with antibodies and other
drugs that healthy NK cells recognize tumor targets.
What’s the next step for these cells?
Dr. Lee: So I think what’s next for the clinic is currently all the trials we have are taking
all NK cells that a person has, growing all of them up and giving all of them back. And
what will be next will be to see if we can select the NK cells that are most defective and
specifically target those cells to the patient’s tumor.
How can patients get involved with your trial?
Dr. Lee: If patients want to get involved in one of the NK cell trials they can look either
online at clinicaltrials.gov. That’s actually a clearing house for not even just the U.S. but
trials all the world and it’s very easy to search for NK cell trials there. They can go on to
the MD Anderson website and we have several places there that they can find the NK
cell trials that are available. We currently have one that’s open, two more that are very
close to opening, and several more coming behind for different diseases. I couldn’t give
a specific one because there’s more than one trial.
How has the Pi Kappa Alpha Taylor Trudeau Cycle for Life Foundation helps your
work?
Dr. Lee: The Pi Kappa Alpha Taylor Trudeau Cycle for Life Foundation has really
helped get this research from the lab to the clinic. There are a lot of hurdles getting
something from the lab to the clinic particularly when you don’t have a pharmaceutical
agent that can just be put into a bottle. So their funds are helping us to do all the
manufacturing of those NK cells and get the clinical staff that’s necessary to get this trial
running.