THOUSAND OAKS, Calif., March 19, 2013 /PRNewswire/ -- Amgen (NASDAQ:AMGN) today announced top-line results from the Phase 3 trial in melanoma, which evaluated the efficacy and safety of talimogene laherparepvec for the treatment of unresected stage IIIB, IIIC or IV melanoma compared to treatment with subcutaneous granulocyte-macrophage colony-stimulating factor (GM-CSF).
The study met its primary endpoint of durable response rate (DRR), defined as the rate of complete or partial response lasting continuously for at least six months. A statistically significant difference was observed in DRR: 16 percent in the talimogene laherparepvec arm versus two percent in the GM-CSF arm. The analysis of overall survival (OS), a key secondary endpoint of the study, is event driven. A pre-planned interim analysis conducted with the analysis of DRR has shown an OS trend in favor of talimogene laherparepvec as compared to GM-CSF. The OS data is expected to mature in late 2013 in line with previous guidance.
"These are the first Phase 3 results of this novel approach to cancer therapy," said Sean E. Harper, M.D., executive vice president of Research and Development at Amgen. "A high unmet need exists in melanoma and we believe the innovative mechanism of action of talimogene laherparepvec may offer a promising approach for these patients."
The most frequent adverse events observed in this trial were fatigue, chills and pyrexia. The most common serious adverse events include disease progression, cellulitis and pyrexia.Among the various types of skin cancer, melanoma is the most aggressive and also the most serious. Although melanoma accounts for less than five percent of skin cancer cases, or 132,000 cases globally each year, melanoma accounts for 75 percent of all skin cancer deaths.[i] Talimogene laherparepvec is an investigational oncolytic immunotherapy designed to work in two important and complementary ways - to cause local lytic destruction of tumors while also stimulating a systemic anti-tumor immune response.
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