Researchers from the John Theurer Cancer Center at Hackensack University Medical Center played an important role in a study that led to the Food & Drug Administration's (FDA) recent fast tracking of ipilimumab, a promising treatment for metastatic melanoma. The FDA based its decision largely on the results of a pivotal study published in the New England Journal of Medicine on August 19, 2010 – the same day the agency accepted Bristol-Myers Squibb's application for the drug's approval and granted the application priority review status.
Ipilimumab is the first drug shown in randomized, placebo-controlled trials to improve survival in stage IV melanoma.
"This study, and the FDA's decision, provides new hope for people with this devastating cancer," said Andrew L. Pecora, M.D., F.A.C.P., C.P.E., Chairman and Executive Administrative Director, John Theurer Cancer Center, who led the study at the John Theurer Cancer Center. "We are proud to have played a role in helping move another promising cancer treatment closer to market."
The incidence of metastatic melanoma has increased over the last three decades, and the death rate continues to climb faster than that of most other cancers. According to the American Cancer Society, there were approximately 68,000 new cases of melanoma in the United States in 2009, and 8,700 melanoma-related deaths. Melanoma accounts for about three percent of all skin cancers, but 80 percent of skin cancer deaths. Melanoma is difficult to treat once it has spread beyond the skin to other parts of the body (metastasized). Very few treatment options exist for people with metastatic melanoma.
In this phase III study, researchers randomly assigned patients to one of three treatment groups: those receiving ipilimumab plus an inactive (placebo) version of gp 100, a cancer vaccine; those receiving ipilimumab plus gp 100; and those receiving gp 100 plus ipilimumab placebo. The treatments were administered once every three weeks, for a total of four treatments. The study was double blinded: neither the researchers nor the patients knew which medications the patients were being given.
To participate in the study, patients must have had stage III or IV (metastatic) melanoma, and must have been previously treated unsuccessfully with another cancer drug. They must also have had a life expectancy of at least four months. 676 patients participated in the study at 125 cancer centers.
Those who received ipilimumab, both by itself and with gp 100, lived a median of about 10 months, while those who received only gp 100 lived about 6.4 months. After two years, approximately 23 percent of those who got ipilimumab were alive, while 14 percent of those who did not receive this drug survived. Ten to 15 percent of those who received ipilimumab suffered attacks on their bodies' immune systems (autoimmune reactions), and seven of the 540 patients who got this drug died from these attacks. Most adverse events suffered by study participants, however, were reversible with treatment.