THOUSAND OAKS, Calif. and SOUTH SAN FRANCISCO, Calif., Aug. 4, 2014 /PRNewswire/ -- Amgen (NASDAQ:AMGN) and its subsidiary, Onyx Pharmaceuticals, Inc., today announced that a planned interim analysis demonstrated that the Phase 3 clinical trial ASPIRE (CArfilzomib, Lenalidomide, and DexamethaSone versus Lenalidomide and Dexamethasone for the treatment of PatIents with Relapsed Multiple MyEloma) met its primary endpoint of progression-free survival (PFS). Patients treated with Kyprolis® (carfilzomib) for Injection in combination with Revlimid® (lenalidomide) and low-dose dexamethasone (KRd) lived significantly longer without their disease worsening (median 26.3 months) compared to patients treated with Revlimid and low-dose dexamethasone (Rd) (median 17.6 months) (HR=0.690, 95 percent CI, 0.570, 0.834, p<0.0001). While the data for overall survival, a secondary endpoint, are not yet mature, the analysis showed a trend in favor of KRd that did not reach statistical significance.
The safety profile observed in this study is consistent with the current U.S. Kyprolis label, including the rate of cardiac events. Treatment discontinuation due to adverse events and on-study deaths were comparable between the two arms. No new safety signals were identified.
Results will be submitted for presentation at the upcoming 56th Annual Meeting of the American Society of Hematology later this year.
"We are excited about these clinical results and the positive prospects they suggest for patients with multiple myeloma," said Robert A. Bradway, chairman and chief executive officer of Amgen, adding, "Our mission at Amgen is to serve patients by advancing medicines that address serious disease. Kyprolis is an important building block in our robust, differentiated pipeline."
Bradway further explained, "Coupled with our recent U.S. regulatory submissions for ivabradine and talimogene laherparepvec and our upcoming regulatory submissions for evolocumab and blinatumomab, our pipeline continues to show notable progress."
Results from the ASPIRE study will form the basis for regulatory submissions throughout the world beginning in the first half of 2015. In the U.S., the data may support the conversion of accelerated approval to full approval and expand the current indication.
"In the treatment of patients with multiple myeloma, periods of remission become shorter following each treatment regimen, underscoring the need for new options. The results of the ASPIRE study demonstrate that Kyprolis can significantly extend the time patients live without their disease progressing," said Pablo J. Cagnoni, M.D., president, Onyx Pharmaceuticals, Inc. "The ability of novel therapies to produce deep and durable responses may, one day, transform this uniformly fatal disease to one that is chronic and manageable."
Onyx conducted the ASPIRE study under a Special Protocol Assessment (SPA) from the U.S. Food and Drug Administration (FDA) and has received Scientific Advice from the European Medicines Agency (EMA) on the design and planned analysis of the study.
The international, randomized Phase 3 ASPIRE (CArfilzomib, Lenalidomide, and DexamethaSone versus Lenalidomide and Dexamethasone for the treatment of PatIents with Relapsed Multiple MyEloma) trial evaluated Kyprolis in combination with lenalidomide and low-dose dexamethasone, versus lenalidomide and low-dose dexamethasone alone, in patients with relapsed multiple myeloma following treatment with one to three prior regimens. The primary endpoint of the trial was progression-free survival, defined as the time from treatment initiation to disease progression or death. Secondary endpoints included overall survival, overall response rate, duration of response, disease control rate, health-related quality of life, and safety. Patients were randomized to receive Kyprolis (20mg/m2 on days 1 and 2 of cycle 1 only, then 27mg/m2 subsequently), in addition to a standard dosing schedule of lenalidomide (25mg per day for 21 days on, 7 days off) and low-dose dexamethasone (40mg per week in 4 week cycles), versus lenalidomide and low-dose dexamethasone alone. The study randomized 792 patients at sites in North America, Europe, and Israel.
About Multiple Myeloma
Multiple myeloma is the second most common hematologic cancer and results from an abnormality of plasma cells, usually in the bone marrow. In the U.S., approximately 70,000 people are living with multiple myeloma and approximately 24,000 new cases are diagnosed annually. Worldwide, nearly 230,000 people are living with multiple myeloma and approximately 114,000 new cases are diagnosed annually. In Europe, approximately 89,000 people are living with multiple myeloma, and approximately 39,000 new cases are diagnosed annually.
About Kyprolis® (carfilzomib) for Injection
On July 20, 2012, the FDA granted accelerated approval of Kyprolis® (carfilzomib) for Injection for the treatment of patients with multiple myeloma who have received at least two prior therapies including bortezomib and an immunomodulatory agent (IMiD), and have demonstrated disease progression on or within 60 days of completion of the last therapy. Approval was based on response rate. Clinical benefit, such as improvement in survival or symptoms, has not been verified.
Kyprolis is marketed in the U.S. by Onyx Pharmaceuticals, Inc., an Amgen subsidiary.
Important Safety Information Regarding Kyprolis® (carfilzomib) for Injection
Safety data have been evaluated in 526 patients with relapsed and/or refractory multiple myeloma who received single-agent Kyprolis. There were 37 deaths in the Phase 2 studies, or 7% of patients. The most common causes of death, other than disease progression, were cardiac (5 patients), end-organ failure (4 patients), and infection (4 patients). Important warnings and precautions include cardiac arrest, congestive heart failure, myocardial ischemia; pulmonary hypertension, pulmonary complications, infusion reactions, tumor lysis syndrome, thrombocytopenia, hepatic toxicity and embryo-fetal toxicity.
Death due to cardiac arrest has occurred within a day of Kyprolis administration. Patients with New York Heart Association Class III and IV heart failure, myocardial infarction in the preceding 6 months, and conduction abnormalities uncontrolled by medications were not eligible for the clinical trials. These patients may be at greater risk for cardiac complications.
Pulmonary arterial hypertension (PAH) was reported in 2% of patients treated with Kyprolis and was Grade 3 or greater in less than 1% of patients. Dyspnea was reported in 35% of patients enrolled in clinical trials. Grade 3 dyspnea occurred in 5%; no Grade 4 events, and 1 death (Grade 5) was reported.
Infusion reactions, characterized by a spectrum of systemic symptoms including fever, chills, arthralgia, myalgia, facial flushing, facial edema, vomiting, weakness, shortness of breath, hypotension, syncope, chest tightness, or angina can occur immediately following or up to 24 hours after administration of Kyprolis. Administration of dexamethasone prior to Kyprolis reduces the incidence and severity of reactions. Tumor lysis syndrome (TLS) occurred following Kyprolis administration in < 1% of patients. Patients with multiple myeloma and a high tumor burden should be considered to be at greater risk for TLS.
Thrombocytopenia following Kyprolis administration resulted in a dose reduction in 1% of patients and discontinuation of treatment with Kyprolis in < 1% of patients.
Cases of hepatic failure, including fatal cases, have been reported (< 1%). Kyprolis can cause elevations of serum transaminases and bilirubin.
There are no adequate and well-controlled studies in pregnant women using Kyprolis. Females of reproductive potential should be advised to avoid becoming pregnant while being treated with Kyprolis.
The most common serious adverse reactions were pneumonia, acute renal failure, pyrexia, and congestive heart failure. The most common adverse reactions (incidence of 30% or greater) observed in clinical trials of patients with multiple myeloma were fatigue, anemia, nausea, thrombocytopenia, dyspnea, diarrhea, and pyrexia. Serious adverse reactions were reported in 45% of patients.
Full prescribing information is available at http://www.kyprolis.com/.
Amgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology.
Amgen focuses on areas of high unmet medical need and leverages its biologics manufacturing expertise to strive for solutions that improve health outcomes and dramatically improve people's lives. A biotechnology pioneer since 1980, Amgen has grown to be the world's largest independent biotechnology company, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential.
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About Onyx Pharmaceuticals, Inc.
Based in South San Francisco, California, Onyx Pharmaceuticals, Inc., an Amgen subsidiary, is a global biopharmaceutical company engaged in the development and commercialization of innovative therapies for improving the lives of people with cancer. The company is focused on developing novel medicines that target key molecular pathways. For more information about Onyx, visit the company's website at http://www.onyx.com/. Onyx Pharmaceuticals is on Twitter. Sign up to follow our Twitter feed @OnyxPharm at http://twitter.com/OnyxPharm.
REVLIMID® is a registered trademark of Celgene Corporation.
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CONTACT: Amgen, Thousand Oaks
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 National Cancer Institute. SEER Stat Fact Sheets: Myeloma. Available at http://seer.cancer.gov/statfacts/html/mulmy.html.
 International Agency for Research on Cancer, GLOBOCAN 2012 database. Available at http://globocan.iarc.fr/.
Cancer Research UK. "Myeloma Incidence Statistics." Available at: http://www.cancerresearchuk.org/cancer-info/cancerstats/types/myeloma/incidence/uk-multiple-myeloma-incidence-statistics#europeandworldwide.