NEW ORLEANS -- More than a third of advanced-melanoma patients who received one of the new immunotherapy drugs in an early trial were alive five years after starting treatment -- double the survival rate typical of the disease, according to a new study.
The data, released Sunday at a cancer conference, showed that 34 percent of patients with metastatic melanoma who received Opdivo, an immunotherapy drug also known as nivolumab, have survived. The five-year survival rate for patients with advanced melanoma who got other treatments was 16.6 percent between 2005 and 2011, according to the National Cancer Institute.
Researchers said the study is important because it represents the first long-term follow-up of survival data from a trial using an "anti-PD-1" immunotherapy drug. That approach targets the PD-1 protein, which is involved in a complex process that prevents the immune system's T-cells from attacking cancer.
"It is very encouraging that a subset of melanoma patients is experiencing a long-term survival benefit," said F. Stephen Hodi, director of the Melanoma Center at Dana-Farber Cancer Institute, who led the study. The data "provide a foundation" for using anti-PD-1 drugs as standard treatment for melanoma patients, he added. "Hopefully this would translate to other cancers as well."
Louis Weiner, director of the Georgetown Lombardi Cancer Center, who was not involved in the study, said he was impressed by the results. "A lot more people are living longer and hitting major milestones with their loved ones because of this," he said.
The study was released at the American Association for Cancer Research annual meeting, where thousands of scientists and physicians are gathering this week to share the latest developments. Much of the research to be presented is focused on immunotherapy, which is seen as the most promising advance in cancer treatment in decades.
Doctors used the immunotherapy drug Keytruda, along with radiation, to treat former president Jimmy Carter, who announced last year that he had contracted melanoma that had spread to his brain. In early March, Carter announced that he was stopping treatment because the treatment had been so successful.
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