A Triumph in the War Against Cancer
Oncologist Brian Druker developed a new treatment for a deadly cancer, leading to a breakthrough that has transformed medicine
- By Terence Monmaney
- Photographs by Robbie McClaran
- Smithsonian magazine, May 2011, Subscribe
(Page 3 of 8)
“He lets the science do the talking.”
Druker grew up the youngest of four children in St. Paul, Minnesota, and attended public schools, excelling at math and science. His father was a chemist at 3M whose work on printing processes was patented. His mother was a homemaker who got involved in school-board politics and ran unsuccessfully for the state legislature. After graduating with a chemistry degree from UC San Diego, he stayed on, and in 1978, his first year in medical school, he wrote a 16-page paper hinting at a future he would help create. Written in longhand with blue ink on lined notebook paper and titled “Cancer Chemotherapy,” it concluded that, someday, when the action of cancer drugs is “understood in biochemical terms the field of cancer chemotherapy should make advancements far beyond the progress already made.”
After the Dana-Farber Cancer Institute gave him the bum’s rush, Druker marshaled new resolve. “When I moved here to Oregon, my goal was to identify a drug company that had a drug for CML and get that into the clinic,” he said.
He’d previously met Nick Lydon, a biochemist at the Swiss pharmaceutical firm Ciba-Geigy (which would merge with Sandoz in 1996 to form Novartis). Lydon had collaborated with Roberts, Druker’s former lab chief. “I called my friend Nick at Ciba-Geigy and he said, ‘We have what you’re looking for.’” It was called STI571. Company chemists had synthesized it and other compounds while searching for a new anti-inflammatory drug, but they had learned it could also block the activity of enzymes in a test tube. Still, they hadn’t quite decided what to do with the compound.
In August 1993, Druker received his first batch of liquid STI571 and another candidate compound from Switzerland. Using the enzyme-measuring tool he’d helped develop, he confirmed that STI571 strongly inhibited the BCR-ABL enzyme, which belongs to a class of enzymes known as tyrosine kinases; the other compound did so only weakly. He also poured minute amounts of STI571 into a tray of thimble-size containers that held fluid and live white blood cells derived from a CML patient. Druker had hoped the cells’ growth would slow or stop. Even better, the cells died. Moreover, a large amount of STI571 given to healthy cells in a dish did no harm. “Brian’s contribution was critical,” Lydon recalled, in convincing the company to “move in that direction.”
But, of course, the road to dashed hopes is paved with experimental drugs that looked terrific in a test tube but failed in human beings. Skeptics pointed out that hundreds of different types of tyrosine kinase enzymes are at work in the body, and, they added, wouldn’t a drug that blocked one also block many others and wreak physiological havoc? “There were many naysayers who argued that it would be impossible to develop specific protein kinase inhibitors” for treating cancer, Tony Hunter, a biochemist at the Salk Institute in La Jolla, California, wrote in the Journal of Clinical Investigation.
Scientific ideas don’t take root like dandelion seeds wafted onto fertile ground. They need advocates, people who want to win. Druker plugged away, doing more experiments, such as inducing a form of CML in laboratory mice and subjecting them to STI571. It all but eliminated the animals’ disease. “I was putting in probably 60 to 80 hours a week,” recalled Druker, who in his scant free time competed in bicycle races, a sport that demands a high tolerance for pain and a sense of when to break out of the pack. “My life in those days was I’d work [in the lab], work out, eat and sleep.” What was driving him, he said, were CML patients who were dying.
By 1997, having published numerous studies with co-workers in Portland and Switzerland, Druker believed the compound was ready to be tried in human beings. Novartis disagreed. For one thing, when dogs had been given the drug in intravenous form, it tended to cause blood clots at the end of the catheter. Novartis chemists spent months reformulating the liquid drug as a pill. But when the researchers gave large doses to dogs, the animals showed signs of liver damage. Some company officials, Druker recalled, advised dropping the project altogether.
But the canine liver damage didn’t faze him; chemotherapy, after all, is destructive. “We knew how to give people toxic cancer drugs,” he said.
The next thing Druker did may not have been illegal, but it certainly wasn’t kosher. He bypassed Novartis and went straight to the Food and Drug Administration to see if he’d accumulated enough data to start a human trial. “I called up the toxicologist at the FDA and said, ‘Here’s the problem.’ And he said, ‘My goodness, you have a ton of data, we would probably accept this application.’” Druker then told Novartis what he’d done. “I got myself in some hot water because I’d gone behind their back.”
Finally, in June 1998, with FDA permission to proceed, Druker administered STI571 to a human being, a 68-year-old Oregon man with CML. “It was almost anticlimactic,” Druker recalled, “in that we’d been ready in November 1996 and here it was over a year and a half later.”
He had recruited two eminent oncologists to help run the clinical trial, Moshe Talpaz at the M.D. Anderson Cancer Center in Houston and Charles Sawyers at UCLA. All the CML patients enrolled in the three cities had undergone interferon therapy and either had failed to improve or had relapsed. None was eligible for a bone marrow transplant.
Gradually increasing the STI571 dosage, the physicians observed by around six months that astronomical white blood counts of nearly 100,000 cells per cubic millimeter were falling to less than 10,000, well within normal. Analysis of one of the first patients’ white blood cells found no signs of the Philadelphia chromosome, suggesting the leukemia had been stopped at the source. More impressive, whatever trace of the BCR-ABL gene remained had ceased copying itself. “That’s when we knew we had something the likes of which had never been seen before in cancer therapy,” Druker said.
As word spread on the Internet, other CML patients wanted in. Druker pressed Novartis to produce more of the drug. But Novartis wasn’t ready. The drug was difficult to make, Daniel Vasella, then the Novartis chief executive officer and now chairman of the board, would recall in his book about the drug, Magic Cancer Bullet. “Nor was [the drug] a high priority, given the small number of CML patients,” he added. Plus, proving that it was both safe and effective would require a substantial investment. “A severe side effect could develop in one out of 1,000 patients and that would be the end of the trial,” he wrote.
In September 1999, Druker got an e-mail from a 33-year-old CML patient in Montreal, Suzan McNamara. She’d been on interferon, which had suppressed her disease for nearly a year, but now it was roaring back, and she wanted to join an STI571 trial. “I was sick to the point where I could barely leave my house,” she recalled to me.
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Comments (54)
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Ponatinib is one of the medications currently under investigation for its ability to treat CML and ALL (via http://www.rxwiki.com/ponatinib). Is there any news on when this will hit the market?
Posted by dailyrx on December 13,2012 | 03:36 PM
Dr. Druker well deserves Nobel Prize! His work ushered the era of effective treatment of metastatic stage IV melanoma, for example. For 40 years no one knew how to effectively combat this disease. It killed a lot of young people, including Bob Marley. PLX4032 (aka vemurafenib, trade name Zelboraf) is now FDA-approved. GSK prepares even better stuff- dabrafenib+tamatenib (BRAF+MEK inhibitor combo). Now the research in targeted therapy is exploding, and Dr. Druker ushered this watershed!
Posted by Gregory Pribush on October 24,2012 | 07:40 AM
this was very well writen. it's very thourgh amd keep writing stuff like this i enjoy reading it.
Posted by bryan wines on May 22,2012 | 02:16 PM
lovely
Posted by jneppz on May 2,2012 | 01:06 PM
Dude you a boss thanks man you awsomes
Posted by Munoz on May 2,2012 | 01:05 PM
Dr,
My mother was diagnosed with lukemia 11 years ago. she had from what i can understand two types, of the blood and of the bone marrow. they doctors here in spain managed to cure her of the blood but she has been on gleevec to treet the bone marrow for the past 11 years. in the past year she has been suffering from problems, fatuige, water retention, and she has been told after blood tests that she is very aneemic. they started giving her injections and pills to balkance her iron deficiency out but in the end they have found out that it is the gleevec that is causing the problem. in the last week they have taken her off gleevec and she has started taking another medication. as a result it has knocked her for 6 and she can barley walk around . they had to give her an emergency blood transfusion two days ago and it has made her worse. she is suffering from vomiting and nausea, and is constantly sleeping or out of breath. she has no apitite at all and no energy. I was suprised that they did not keep her in at the hospital to monitor her after the transfusion but i suppose due to all the doctors and nursing cuts here in spain, she would just be filling up another bed. i am truly conserned about her. do you have any suggestions as to how she sould prosceed and is what she is going through normal after a medication change and transfusion ? i would very much apreciate your advice.
many many many thanks,
Frank from spain, mallorca
Posted by frank on January 21,2012 | 01:40 PM
It is truely amazing how Gleevec came to be. Thank You Dr. Drunker and all the other doctors who put forth the effort to bring this to us. My husband was dx Sept 17 2003 intially statred gleevec for two years then he became resisant. He actually particapted in first phase trials for sprycel which actually just concluded a couple months ago. What a blessing for us to have this drug and several more if needed.
Posted by Tammy on October 13,2011 | 01:30 PM
I was so excited to read this article a friend told me about it. It was nice to see the person who came up with this drug. Praise the Lord Dr. Druker found this and he wanted to help others. So glad he he didn't give up. I was just diagnosed with CML August 15, 2011. Praise the Lord I don't have to go through the agony so many others have endured. What a mighty God we serve!! :)
Posted by Angie Burns on September 24,2011 | 10:42 AM
I have Hemochromatosis for over 20 yrs & was recently found to be in early stage of CLL which was confirmed by 2 blood tests. I also am slightly Anemic. I am 81 yrs young and in general good health. If there are any test programs I would be interested.I am presently being monitored at Sloan Kettering
ThANK YOU.
Posted by susan miller on August 6,2011 | 03:12 PM
I was diagnosed with a very rare form of CML after a routine blood test in August 2005. The difference versus regular CML is that my mutated gene is 5;12 and not 9;22. I was blessed to have been offered Gleevec through M D Anderson, Dr. Susan O'Brien and Lizzy Pavel PA and I'm in a testing protocol for my rare form of CML like disease. To make a long story short, I've been in complete remission for 6 years since taking Gleevec in November 2005. I thank God first, and al the researchers and MD's that made this targeted cancer drug successful and available. I hopeful that by being in a testing protocol that the drug will be available to anyone who needs it. Gleevec is still not FDA approved for my disease, therefore not available through Medicare D. The only way I got the Gleevec in 2006 was through a company retirement secondary benefit drug program. I got the Gleevec to in November 2005 and then our wonderful government took it away me in early 2006 when Medicare D stared. I have only contempt for our wonderful Medicare D program. After all, the only reason to have medical insurance like all insurance, is to cover the very serious situation. After paying into system at max. Level for 40 plus years, the medicare drug wasn't,t there when I needed it!!!
Gleevec worked for me and I continue to monitor blood and bone marrow once a year at M D Anderson in Houston.
When I hear about previous treatments for this blood disorder, I, so blessed to have Gleevec. Thanks be to God, I'm truly grateful!
Posted by Charles Hannah on July 14,2011 | 05:00 PM
After reading this wonderful article, Dr Brian Druker is my hero! Last month my dear brother, William E. Barnett of Williamsburg, VA was diagnosed with CML! Thank goodness for Dr Druker's research to discover the "miracle drug" Gleevac! In 1 1/2 months he is back to work and doing great! There are no words but to say "Thank You, Thank you!" over and over again.....
Bud's sister in California
Posted by Cindy R. Jagger on July 5,2011 | 09:01 PM
Would this drug help ALL patients?
Posted by Tina McAninch on July 5,2011 | 10:09 AM
Cancer is one of the most typical diseases in the Western countries. Its seriousness is seen in many countries where as many as every third person dies of it, and it is the second most common cause of death immediately after the cardiovascular diseases. Especially cancer of the lungs has become very common, and for example in the United States, it takes more victims than any other type of cancer.
Posted by telson on June 27,2011 | 12:47 AM
My Dad is 72 and is currently going thru chemo for AML..can this drug help him?
Scott
Posted by Scott on June 22,2011 | 01:35 PM
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