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‘Amazing’ Therapy Wipes Out Leukemia in Penn Study
Merry Christmas to all of those diagnosed with chronic lymphocytic leukemia, such as myself. As I have spoken about many times before, I always considered myself very lucky because I responded so well to my chemotherapy treatments and hit remission quickly. That saved me from needing the next step of a stem cell or bone marrow transplant, which so many people have had to rely on.
In the back of my head (way way back), I acknowledge the remote possibility that my CLL could return… someday. I don’t believe it will and I live my life like it won’t. But that chance does exist. However, I buffer that notion with the understanding that treatments and protocols get better with each passing day and with each new breakthrough. So I rest very comfortably knowing that “IF” I were to someday need follow up treatment, that the approach would be even better and met with more success than in 2006 when I went through my treatments.
I was aware of the below study as some of the best blood cancer research is done right here in my back yard at The University of Pennsylvania. The results of this study have now been released and this was picked up by our local ABC affiliate, WPVI 6ABC via AP.
And with this, I rest even more comfortably and confidently.
By Stephanie Nano – Associated Press
PHILADELPHIA – August 10, 2011 (WPVI) — Scientists are reporting the first clear success with a new approach for treating leukemia – turning the patients’ own blood cells into assassins that hunt and destroy their cancer cells.
They’ve only done it in three patients so far, but the results were striking: Two appear cancer-free up to a year after treatment, and the third patient is improved but still has some cancer. Scientists are already preparing to try the same gene therapy technique for other kinds of cancer.
“It worked great. We were surprised it worked as well as it did,” said Dr. Carl June, a gene therapy expert at the University of Pennsylvania. “We’re just a year out now. We need to find out how long these remissions last.”
He led the study, published Wednesday by two journals, New England Journal of Medicine and Science Translational Medicine. It involved three men with very advanced cases of chronic lymphocytic leukemia, or CLL. The only hope for a cure now is bone marrow or stem cell transplants, which don’t always work and carry a high risk of death.
Scientists have been working for years to find ways to boost the immune system’s ability to fight cancer. Earlier attempts at genetically modifying bloodstream soldiers called T-cells have had limited success; the modified cells didn’t reproduce well and quickly disappeared.
June and his colleagues made changes to the technique, using a novel carrier to deliver the new genes into the T-cells and a signaling mechanism telling the cells to kill and multiply.
That resulted in armies of “serial killer” cells that targeted cancer cells, destroyed them, and went on to kill new cancer as it emerged. It was known that T-cells attack viruses that way, but this is the first time it’s been done against cancer, June said.
For the experiment, blood was taken from each patient and T-cells removed. After they were altered in a lab, millions of the cells were returned to the patient in three infusions.
The researchers described the experience of one 64-year-old patient in detail. There was no change for two weeks, but then he became ill with chills, nausea and fever. He and the other two patients were hit with a condition that occurs when a large number of cancer cells die at the same time – a sign that the gene therapy is working.
“It was like the worse flu of their life,” June said. “But after that, it’s over. They’re well.”
The main complication seems to be that this technique also destroys some other infection-fighting blood cells; so far the patients have been getting monthly treatments for that.
Penn researchers want to test the gene therapy technique in leukemia-related cancers, as well as pancreatic and ovarian cancer, he said. Other institutions are looking at prostate and brain cancer.
Dr. Walter J. Urba of the Providence Cancer Center in Portland, Ore., called the findings “pretty remarkable” but added a note of caution because of the size of the study.
“It’s still just three patients. Three’s better than one, but it’s not 100,” said Urba, one of the authors of an editorial on the research that appears in the New England Journal. What happens long-term is key, he said: “What’s it like a year from now, two years from now, for these patients.”
But Dr. Kanti Rai, a blood cancer expert at New York’s Long Island Jewish Medical Center, could hardly contain his enthusiasm, saying he usually is more reserved in his comments on such reports. “It’s an amazing, amazing kind of achievement,” said Rai, who had no role in the research.
One of the patients, who did not want to be identified, wrote about his illness, and released a statement through the university. The man, himself a scientist, called himself “very lucky,” although he wrote that he didn’t feel that way when he was first diagnosed 15 years ago at age 50.
He was successfully treated over the years with chemotherapy until standard drugs no longer worked.
Now, almost a year since he entered the study, “I’m healthy and still in remission. I know this may not be a permanent condition, but I decided to declare victory and assume that I had won.”
(Copyright ©2011 WPVI-TV/DT. All Rights Reserved.)