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 2 of 8)
At Dana-Farber, Druker landed in a laboratory studying how a normal human cell gives rise to runaway growth—malignancy. Among other things, the lab focused on enzymes, proteins that change other molecules by breaking them down (gut enzymes, for example, help digest food) or linking them up (hair follicle enzymes construct silky keratin fibers). Enzymes also figure in chain reactions, with one enzyme activating another and so on, until some complex cellular feat is accomplished; thus a cell can control a process such as growth or division by initiating a single reaction, like tipping the first domino. Under the lab’s chief, Thomas Roberts, Druker mastered numerous techniques for tracking and measuring enzymes in tissue samples, eventually turning to one implicated in CML.
Working out the details of why this particular enzyme is the key to CML had involved hundreds of scientists around the world—research that would lead to several Nobel Prizes—but here’s basically where Druker started:
First, all CML patients have the renegade enzyme in their white blood cells.
Second, the enzyme itself is the product of a freakish gene, called BCR-ABL, formed during a single myeloid stem cell’s division and thereafter transmitted to billions of descendants: the tips of two chromosomes, those spindly structures that store DNA, actually swap places, causing separated genes called BCR and ABL to fuse (see illustration). The new mutant BCR-ABL gene sits on a peculiar chromosome discovered in 1960 by scientists at the University of Pennsylvania. This “Philadelphia chromosome,” visible through a microscope, is CML’s hallmark.
Third, the BCR-ABL enzyme is the evil twin of a normal enzyme that helps control the production of white blood cells. But like a switch stuck in the “on” position, the mutant spurs the wild proliferation that is leukemia.
You didn’t have to be a Harvard doctor to see that a single enzyme that causes a fatal leukemia was, as researchers say, an attractive target for intervention. And, indeed, scientists were then setting out to find or invent compounds that could block the BCR-ABL enzyme.
Druker and his Boston co-workers, using specially designed antibodies, developed a new way to measure the enzyme’s activity—a tool that would prove invaluable to evaluating potential CML treatments. A necktie-wearing physician among jean-clad PhDs, Druker was racing competitors at other research centers to find a drug that suppresses cancer by disabling a critical enzyme and spares healthy tissues in the bargain. By tradition, cancer treatments carpet-bombed the body with powerful drugs, killing healthy and cancer cells alike—“cytotoxic chemotherapy,” doctors call it. The alternative, targeted therapy, would fight cancer better with less collateral damage, or at least that was the notion that often kept Druker in the lab until 11 p.m.
Then things began to fall apart. “My marriage had broken down. I wasn’t what you would call a devoted husband. I was a devoted researcher and scientist and physician. And that took a toll.” (Druker and his wife split after two years of marriage and were later divorced.)
Still, with a score of published studies and a nifty enzyme-measuring technique to show for his efforts, Druker thought he was ready to move up the Harvard ladder from instructor to assistant professor. “I sat down with the head of medical oncology at Dana-Farber,” Druker recalled. “He looked over my résumé and said, ‘I just don’t think this work is going to go anywhere here.’” Translation: “I was told I had no future at Dana-Farber.”
“It was awful,” he recalled. “I was depressed. But it forced me to really say, Do I believe in myself? Am I going to make it, make a difference?”
Growing Concern
Asked to describe Druker’s approach, one scientist said it boiled down to “perseverance and stubbornness in not letting go of an idea.”
“I think intrinsically he’s a shy person,” said another. “But on this”—cancer therapy—“he’s like a crusader.”
“He takes everything that is complicated, shoves it in his mind and outputs the simplest possible interpretation and intervention.”
“When you ask a question, there’s silence in the room, almost uncomfortable silence, and you’re, like, did he even hear me? He thinks things through before giving an answer.”
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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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