Amgen’s Talimogene Laherparepvec Reduced Size Of Melanoma Tumors In New Phase 3 Retrospective Analysis
Data Showed Tumor Shrinkage in Both Injected and Metastasized Tumors
THOUSAND OAKS, Calif., March 14, 2014 /PRNewswire/ — Amgen (NASDAQ:AMGN) today announced findings from a pre-specified retrospective analysis of patients with metastatic melanoma that showed talimogene laherparepvec reduced the size of injected tumors and also non-injected tumors that had metastasized to other parts of the body. The analysis recorded tumor-level responses from a pivotal Phase 3 study evaluating talimogene laherparepvec in patients with injectable unresected stage IIIB, IIIC or IV melanoma compared to granulocyte-macrophage colony-stimulating factor (GM-CSF). Full results were presented today during an oral session at the Society of Surgical Oncology (SSO) 67(th) Annual Cancer Symposium in Phoenix.
Talimogene laherparepvec is an investigational oncolytic immunotherapy designed to selectively replicate in tumor tissue and to initiate a systemic anti-tumor immune response.
Of the 295 patients treated with talimogene laherparepvec, almost 4,000 tumor lesions were tracked for this analysis. Half of these lesions were injected with talimogene laherparepvec at least once, while the rest were not injected, including visceral tumor lesions (tumors involving solid organs such as the lungs and liver). The results showed a 50 percent or greater reduction in tumor size in 64 percent of injected tumors. In addition, one-third of uninjected non-visceral tumors, and 15 percent of visceral tumors were also reduced by at least 50 percent. There were 35 melanoma-related surgeries performed during this trial of which 30 percent successfully removed all residual disease.
The most frequently observed adverse events in the Phase 3 study were fatigue, chills and pyrexia. The most common serious adverse events include disease progression in both groups, and cellulitis and pyrexia in the talimogene laherparepvec group. Serious adverse events occurred in 26 percent of talimogene laherparepvec patients and 13 percent of GM-CSF patients. Immune-mediated events were reported infrequently.
“These data add to the body of evidence supporting talimogene laherparepvec’s local and distant effect, and its potential ability to stimulate a systemic anti-tumor immune response,” said Sean E. Harper, M.D., executive vice president of Research and Development at Amgen. “Melanoma remains a devastating and difficult-to-treat disease, and talimogene laherparepvec continues to demonstrate encouraging results in this setting.”
About Talimogene Laherparepvec
Talimogene laherparepvec is an investigational oncolytic immunotherapy designed to selectively replicate in tumor tissue and to initiate a systemic anti-tumor immune response. Talimogene laherparepvec is injected directly into tumor tissue and is intended to replicate preferentially in tumor cells causing lytic cell death and releasing an array of tumor-derived antigens. Talimogene laherparepvec is also engineered to express granulocyte-macrophage colony-stimulating factor (GM-CSF), a white blood cell growth factor, which can help to activate the immune system. The aim of this combination of actions is to initiate a systemic anti-tumor immune response that targets tumor cells throughout the body.
Melanoma is a type of skin cancer that is characterized by the uncontrolled growth of melanocytes, which are the cells responsible for providing the pigment to skin.(1) Melanoma is the most aggressive and serious form of skin cancer. Currently, 132,000 melanoma cases occur globally each year.(2) In the U.S., while melanoma accounts for less than 5 percent of skin cancer cases, it causes the most skin cancer deaths.(2) The number of new cases of melanoma in the U.S. has been increasing for the last 30 years.(2 )
Melanoma is considered to be advanced when it has spread, or metastasized, from the origin site to deeper parts of the skin or other organs such as the lymph nodes, lungs or other parts of the body distant from the primary tumor site.(3)
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(1 )National Cancer Institute, National Institute of Health, U.S. Dept. of Health and Human Services. What You Need to Know About Melanoma and Other Skin Cancers. June 2010 http://www.cancer.gov/cancertopics/wyntk/skin. Posted January 11, 2011. Accessed February 21, 2014.
(2 ) Ultraviolet radiation and the INTERSUN Programme. World Health Organization. http://www.who.int/uv/intersunprogramme/en/. Accessed February 21, 2014. ( )
(3 )American Cancer Society. Melanoma Skin Cancer. http://www.cancer.org/acs/groups/cid/documents/webcontent/003120-pdf.pdf. Accessed February 21, 2014.