New drug slows advanced prostate cancer | Machines Like Us

A new medication proved effective in slowing the spread of metastatic prostate cancer, while helping to maintain the quality of life, in patients with advanced disease. The phase 3 study was unblinded midway, allowing patients receiving the placebo to instead take the drug because of the favorable results.

The study is the first randomized clinical trial to document expanded benefits among a particular group of prostate cancer patients in whom the disease had spread. The medication, abiraterone acetate -- marketed as Zytiga ? also delayed the development of pain and deterioration of the patients' overall condition.

The researchers say the medication could provide new treatment options.

"This drug extended lives and gave patients more time when they weren't experiencing significant pain from the disease,'' said the principal investigator of the international trial, Charles J. Ryan, MD, an associate professor of clinical medicine at the UCSF Helen Diller Family Comprehensive Cancer Center.

"This is an interim analysis, the final analysis should be available in 2014," he said. "But it appears that this medication may lay a foundation for the use of this drug at an earlier stage of prostate cancer, and its benefits may be able to be delivered to a much wider population of patients as a result.''

Ryan will present the data on June 2 at the 48th annual meeting of the American Society of Clinical Oncology in Chicago.

Prostate cancer is the second most common form of cancer in men, with some 30,000 people annually dying from the disease. Approximately one-third of patients require no treatment, because their disease does not metastasize, or spread, while another third are treated and cured. But for the remaining patients, the cancer will recur following treatment or spread to the bones, lymph nodes or other parts of the body. Prostate cancer can turn lethal when it spreads and when it resists standard hormonal therapy.

"These results are the culmination of years of research, and will truly transform the way we take care of patients with advanced prostate cancer,'' said Eric J. Small, MD, a UCSF professor and chief of hematology and oncology at the UCSF Helen Diller Family Comprehensive Cancer Center. He and Ryan have collaborated on the research of this class of medication for about 9 years.

"This is a wonderful milestone in our progress in treating prostate cancer, and provides advanced prostate cancer patients everywhere with an important new weapon to fight their cancer,'' he said.

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