The data comes from an international Phase II study of Zelboraf that included 132 patients followed for at least one year.
Patients with this advanced form of melanoma that has spread to other organs typically survive about nine months. Patients taking Zelboraf, which blocks a mutated BRAF protein, survived an average of 15.9 months, said study senior author Dr. Antoni Ribas, a professor of hematology/oncology and a researcher at UCLA’s Jonsson Cancer Center.
“This study shows that Zelboraf changes the natural history of this disease,” Ribas said. “This data is beyond what I would have expected. We’re seeing a significant number of patients with durable responses to the drug, and that the whole group of treated patients is living longer. These results tell us that this drug is having a very big impact, and this changes the way we treat metastatic melanoma.”
The study appears Feb. 23, 2012 in the peer-reviewed New England Journal of Medicine.
About 50 percent of patients with metastatic melanoma, or 4,000 people a year, have the BRAF mutation and can be treated with Zelboraf, a pill taken twice a day, Ribas said. Of those, 53 percent have an objective response to the drug, meaning their tumors shrink by more than 30 percent. An additional 30 percent of patients have tumor responses of lesser magnitude. Only 14 percent of patients with the BRAF mutation failed to respond to Zelboraf.
The drug represents a breakthrough in treating metastatic melanoma. Prior to this, 10 percent or less of patients with this advanced form of the disease responded to any of the available conventional treatments, Ribas said.
“We knew this drug would make the melanomas shrink in a large proportion of patients and that it worked better than chemotherapy,” Ribas said. “We did not know that patients taking Zelboraf were living longer until now.”
The main limitation with Zelboraf is that tumors eventually become resistant. But Jonsson Cancer Center researchers are studying this resistance and have uncovered several mechanisms by which the cancer gets around Zelboraf. Cancer center scientists currently are seeking agents to target those mechanisms, Ribas said.
For Louise Belley, 60, of Santa Ana, Zelboraf has allowed her to live much longer than her doctors initially predicted, and last June she was able to see her daughter graduate from college. Belley was diagnosed with metastatic melanoma in November of 2007. In June 2009, she was among the first people to get the drug when it was in Phase I studies at the Jonsson Cancer Center.
Her first CT scan in September 2009 after joining the trial - nearly two and a half years ago - was clear of any cancer, she said. Her scans remain clean today.
“At first I was devastated by my diagnosis, because I realized I was in a really bad place,” Belley said. “But now I feel strongly that the chances are good that I will continue to be cancer free, and I plan to live every day to the fullest.”
Zelboraf was approved by the U.S. Food and Drug Administration for use in metastatic melanoma in August of 2011. About 70,000 new cases of melanoma are diagnosed each year in the United States. Of those, 8,000 people will die of the disease.
“This trial shows a high rate of response to (Zelboraf) in patients with metastatic melanoma and activating BRAF mutations,” the study states. “These results independently confirm the high response rate and response duration shown in a Phase I trial.”
UCLA's Jonsson Comprehensive Cancer Center has more than 240 researchers and clinicians engaged in disease research, prevention, detection, control, treatment and education. One of the nation's largest comprehensive cancer centers, the Jonsson center is dedicated to promoting research and translating basic science into leading-edge clinical studies. In July 2011, the Jonsson Cancer Center was named among the top 10 cancer centers nationwide by U.S. News & World Report, a ranking it has held for 11 of the last 12 years. For more information on the Jonsson Cancer Center, visit our website at http://www.cancer.ucla.edu.
Kim Irwin | Newswise Science News
Researchers identify potentially druggable mutant p53 proteins that promote cancer growth
09.12.2016 | Cold Spring Harbor Laboratory
Plant-based substance boosts eyelash growth
09.12.2016 | Fraunhofer-Institut für Angewandte Polymerforschung IAP
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine