Overall Survival Analysis From KYPROLIS® (Carfilzomib) Phase 3 ASPIRE Trial Published in the Journal of Clinical Oncology

THOUSAND OAKS, Calif., Jan. 17, 2018 /PRNewswire/ -- Amgen (NASDAQ:AMGN) today announced that the Journal of Clinical Oncology published positive overall survival (OS) findings from the final analysis of the Phase 3 ASPIRE trial, which demonstrated that the addition of KYPROLIS^® (carfilzomib) to lenalidomide and dexamethasone (KRd) reduced the risk of death by 21 percent versus lenalidomide and dexamethasone alone (Rd) and extended OS by 7.9 months in patients with relapsed or refractory multiple myeloma (median OS 48.3 months for KRd versus 40.4 months for Rd, HR = 0.79, 95 percent CI, 0.67 – 0.95; 1-sided p=0.0045). Notably, an OS improvement of 11.4 months was observed for patients at first relapse (47.3 versus 35.9 months [HR = 0.81, 95 percent CI, 0.62 – 1.06]), supporting early use of KRd.

"Results from the final analysis of the Phase 3 ASPIRE trial published today in the Journal of Clinical Oncology are significant, as they further validate carfilzomib, lenalidomide and dexamethasone as a standard of care regimen for patients with relapsed or refractory multiple myeloma," said Keith Stewart, M.B., Ch.B., Mayo Clinic in Arizona and principal investigator of the ASPIRE trial. "Furthermore, these data showed that early use of carfilzomib, lenalidomide and dexamethasone at first relapse provided nearly one additional year of survival for patients regardless of prior treatment with bortezomib or transplant."

"As seen in two different Phase 3 studies, KYPROLIS-based regimens are the first and only therapy combinations to demonstrate a significant overall survival advantage for patients with relapsed or refractory multiple myeloma versus recent standards of care," said David M. Reese, M.D., senior vice president of Translational Sciences and Oncology at Amgen. "We look forward to continuing conversations with regulatory authorities in the U.S. and Europe to add these results to the KYPROLIS label."

The safety data from ASPIRE was consistent with the known safety profile of KYPROLIS. The most common adverse events (greater than or equal to 20 percent) in the KYPROLIS arm were diarrhea, anemia, neutropenia, fatigue, upper respiratory tract infection, pyrexia, cough, hypokalemia, thrombocytopenia, muscle spasms, pneumonia, nasopharyngitis, nausea, constipation, insomnia and bronchitis.

The final analysis of ASPIRE included subgroup analyses by prior lines of therapy, prior Velcade^® (bortezomib) exposure at first relapse, and prior transplant at first relapse. Among these three groups, there was an 18 to 29 percent reduction in the risk of death for KRd versus Rd, consistent with findings in the overall population. Median OS was 11.4 months longer for KRd versus Rd in patients who had received one prior line of therapy and 6.5 months longer for patients with two or more prior lines (48.8 versus 42.3 months [HR = 0.79, 95 percent CI, 0.62 – 0.99]). Among patients who had received one prior line, median OS was improved by 12 months with KRd versus Rd in those with prior Velcade exposure (45.9 versus 33.9 months [HR = 0.82; 95 percent CI, 0.56 – 1.19]) and by 7.9 months in those without prior Velcade (48.3 versus 40.4 months [HR = 0.80, 95 percent CI, 0.55 – 1.17]). Median OS was also improved by 18.6 months with KRd versus Rd among patients with prior transplantation at first relapse (57.2 versus 38.6 months [HR = 0.71, 95 percent CI, 0.48 –1.05]).

The KRd regimen used in this trial is currently approved in the U.S., European Union and other countries based on primary analysis of progression-free survival (PFS) in the ASPIRE study. Amgen has submitted a supplemental New Drug Application to the U.S. Food and Drug Administration and a variation to the marketing application to the European Medicines Agency to include the OS data from ASPIRE in the product information for KYPROLIS.

About ASPIRE
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 dexamethasone, versus lenalidomide and dexamethasone alone, in patients with relapsed or refractory multiple myeloma following treatment with one to three prior regimens. The primary endpoint of the trial was PFS, defined as the time from treatment initiation to disease progression or death. Secondary endpoints included OS, overall response rate, duration of response, disease control rate, health-related quality of life and safety. Patients were randomized to receive KYPROLIS (20 mg/m² on days 1 and 2 of cycle one, escalating to 27 mg/m² on days 8, 9, 15 and 16 of cycle one and continuing on days 1, 2, 8, 9, 15 and 16 of subsequent cycles), in addition to a standard dosing schedule of lenalidomide (25 mg per day for 21 days on, seven days off) and low-dose dexamethasone (40 mg per week in four-week cycles), versus lenalidomide and low-dose dexamethasone alone. The study randomized 792 patients at sites in North America, Europe and Israel.

Patients treated with KRd reported improved global health status, with higher Global Health Status/Quality of Life (QoL) scores compared with Rd over 18 cycles of treatment (2‑sided p<0.0001) measured with the EORTC QLQ‑C30, an instrument validated in multiple myeloma.

Overall survival by Revised International Staging System (R-ISS) stage was also assessed. For R-ISS stage I (KRd, n = 42; Rd, n = 46), median OS was not reached for KRd and was 58 months for Rd (HR = 0.49, 95 percent CI, 0.26 – 0.92). For patients with R-ISS stage II (KRd, n = 194; Rd, n = 195), median OS was 45.4 months for KRd and 41.2 months for Rd (4.2 months; HR = 0.86, 95 percent CI, 0.68 – 1.10). For the small number of patients with R-ISS stage III (KRd, n = 37; Rd, n = 47), median OS was 23.3 months for KRd and 18.8 months for Rd (4.5 months; HR = 1.05, 95 percent CI, 0.66 – 1.68).

For the overall study population, treatment discontinuation due to an adverse event occurred in 19.9 percent of patients treated with KRd and 21.5 percent of patients receiving Rd. Fatal adverse events were reported in 11.5 percent of KRd-treated patients and 10.5 percent of patients treated with Rd. Grade ≥3 adverse event rates were 87 percent for KRd and 83 percent for Rd. Selected grade ≥3 adverse events of interest (grouped terms; KRd vs Rd) included acute renal failure (3.8 percent versus 3.3 percent), cardiac failure (4.3 percent versus 2.1 percent), and hypertension (6.4 percent versus 2.3 percent).

About Multiple Myeloma
Multiple myeloma is an incurable blood cancer, characterized by a recurring pattern of remission and relapse.¹ It is a rare and life-threatening disease that accounts for approximately one percent of all cancers. ^2,3 Worldwide, approximately 114,000 people are diagnosed with multiple myeloma each year and 80,000 patient deaths are reported on an annual basis.²

About KYPROLIS^® (carfilzomib) 
Proteasomes play an important role in cell function and growth by breaking down proteins that are damaged or no longer needed.⁴ KYPROLIS has been shown to block proteasomes, leading to an excessive build-up of proteins within cells.⁴ In some cells, KYPROLIS can cause cell death, especially in myeloma cells because they are more likely to contain a higher amount of abnormal proteins. ^4,5

KYPROLIS is approved in the U.S. for the following:

• In combination with dexamethasone or with lenalidomide plus dexamethasone for the treatment of patients with relapsed or refractory multiple myeloma who have received one to three lines of therapy.
• As a single agent for the treatment of patients with relapsed or refractory multiple myeloma who have received one or more lines of therapy.

KYPROLIS is also approved in Argentina, Australia, Bahrain, Canada, Hong Kong, Israel, Japan, Kuwait, Lebanon, Macao, Mexico, Thailand, Colombia, S. Korea, Canada, Qatar, Switzerland, United Arab Emirates, Turkey, Russia, Brazil, India, Oman and the European Union. Additional regulatory applications for KYPROLIS are underway and have been submitted to health authorities worldwide.

IMPORTANT SAFETY INFORMATION

Cardiac Toxicities

• New onset or worsening of pre-existing cardiac failure (e.g., congestive heart failure, pulmonary edema, decreased ejection fraction), restrictive cardiomyopathy, myocardial ischemia, and myocardial infarction including fatalities have occurred following administration of KYPROLIS. Some events occurred in patients with normal baseline ventricular function. Death due to cardiac arrest has occurred within one day of KYPROLIS administration.
• Monitor patients for clinical signs or symptoms of cardiac failure or cardiac ischemia. Evaluate promptly if cardiac toxicity is suspected. Withhold KYPROLIS for Grade 3 or 4 cardiac adverse events until recovery, and consider whether to restart KYPROLIS at 1 dose level reduction based on a benefit/risk assessment.
• While adequate hydration is required prior to each dose in Cycle 1, monitor all patients for evidence of volume overload, especially patients at risk for cardiac failure. Adjust total fluid intake as clinically appropriate in patients with baseline cardiac failure or who are at risk for cardiac failure.
• Patients ≥ 75 years, the risk of cardiac failure is increased. Patients with New York Heart Association Class III and IV heart failure, recent myocardial infarction, conduction abnormalities, angina, or arrhythmias may be at greater risk for cardiac complications and should have a comprehensive medical assessment (including blood pressure and fluid management) prior to starting treatment with KYPROLIS and remain under close follow-up.

Acute Renal Failure

• Cases of acute renal failure and renal insufficiency adverse events (including renal failure) have occurred in patients receiving KYPROLIS. Acute renal failure was reported more frequently in patients with advanced relapsed and refractory multiple myeloma who received KYPROLIS monotherapy. Monitor renal function with regular measurement of the serum creatinine and/or estimated creatinine clearance. Reduce or withhold dose as appropriate.

Tumor Lysis Syndrome

• Cases of Tumor Lysis Syndrome (TLS), including fatal outcomes, have occurred in patients receiving KYPROLIS. Patients with multiple myeloma and a high tumor burden should be considered at greater risk for TLS. Adequate hydration is required prior to each dose in Cycle 1, and in subsequent cycles as needed. Consider uric acid lowering drugs in patients at risk for TLS. Monitor for evidence of TLS during treatment and manage promptly. Withhold KYPROLIS until TLS is resolved.

Pulmonary Toxicity

• Acute Respiratory Distress Syndrome (ARDS), acute respiratory failure, and acute diffuse infiltrative pulmonary disease such as pneumonitis and interstitial lung disease have occurred in patients receiving KYPROLIS. Some events have been fatal. In the event of drug-induced pulmonary toxicity, discontinue KYPROLIS.

Pulmonary Hypertension

• Pulmonary arterial hypertension (PAH) was reported in patients treated with KYPROLIS. Evaluate with cardiac imaging and/or other tests as indicated. Withhold KYPROLIS for PAH until resolved or returned to baseline and consider whether to restart KYPROLIS based on a benefit/risk assessment.

Dyspnea

• Dyspnea was reported in patients treated with KYPROLIS. Evaluate dyspnea to exclude cardiopulmonary conditions including cardiac failure and pulmonary syndromes. Stop KYPROLIS for Grade 3 or 4 dyspnea until resolved or returned to baseline. Consider whether to restart KYPROLIS based on a benefit/risk assessment.

Hypertension

• Hypertension, including hypertensive crisis and hypertensive emergency, has been observed with KYPROLIS. Some of these events have been fatal. Monitor blood pressure regularly in all patients. If hypertension cannot be adequately controlled, withhold KYPROLIS and evaluate. Consider whether to restart KYPROLIS based on a benefit/risk assessment.

Venous Thrombosis

• Venous thromboembolic events (including deep venous thrombosis and pulmonary embolism) have been observed with KYPROLIS. Thromboprophylaxis is recommended for patients being treated with the combination of KYPROLIS with dexamethasone or with lenalidomide plus dexamethasone. The thromboprophylaxis regimen should be based on an assessment of the patient's underlying risks.
• Patients using oral contraceptives or a hormonal method of contraception associated with a risk of thrombosis should consider an alternative method of effective contraception during treatment with KYPROLIS in combination with dexamethasone or lenalidomide plus dexamethasone.

Infusion Reactions

• Infusion reactions, including life-threatening reactions, have occurred in patients receiving KYPROLIS.
• Symptoms include fever, chills, arthralgia, myalgia, facial flushing, facial edema, vomiting, weakness, shortness of breath, hypotension, syncope, chest tightness, or angina. These reactions can occur immediately following or up to 24 hours after administration of KYPROLIS. Premedicate with dexamethasone to reduce the incidence and severity of infusion reactions. Inform patients of the risk and of symptoms of an infusion reaction and to contact a physician immediately if they occur.

Hemorrhage

• Fatal or serious cases of hemorrhage have been reported in patients receiving KYPROLIS. Hemorrhagic events have included gastrointestinal, pulmonary, and intracranial hemorrhage and epistaxis. Promptly evaluate signs and symptoms of blood loss. Reduce or withhold dose as appropriate.

Thrombocytopenia

• KYPROLIS causes thrombocytopenia with recovery to baseline platelet count usually by the start of the next cycle. Thrombocytopenia was reported in patients receiving KYPROLIS. Monitor platelet counts frequently during treatment with KYPROLIS. Reduce or withhold dose as appropriate.

Hepatic Toxicity and Hepatic Failure

• Cases of hepatic failure, including fatal cases, have been reported during treatment with KYPROLIS. KYPROLIS can cause increased serum transaminases. Monitor liver enzymes regularly regardless of baseline values. Reduce or withhold dose as appropriate.

Thrombotic Microangiopathy

• Cases of thrombotic microangiopathy, including thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS), including fatal outcome have occurred in patients receiving KYPROLIS. Monitor for signs and symptoms of TTP/HUS. Discontinue KYPROLIS if diagnosis is suspected. If the diagnosis of TTP/HUS is excluded, KYPROLIS may be restarted. The safety of reinitiating KYPROLIS therapy in patients previously experiencing TTP/HUS is not known.

Posterior Reversible Encephalopathy Syndrome (PRES)

• Cases of PRES have occurred in patients receiving KYPROLIS. PRES was formerly known as Reversible Posterior Leukoencephalopathy Syndrome. Consider a neuro-radiological imaging (MRI) for onset of visual or neurological symptoms. Discontinue KYPROLIS if PRES is suspected and evaluate. The safety of reinitiating KYPROLIS therapy in patients previously experiencing PRES is not known.

Increased Fatal and Serious Toxicities in Combination with Melphalan and Prednisone in Newly Diagnosed Transplant‐ineligible Patients

• In a clinical trial of transplant‐ineligible patients with newly diagnosed multiple myeloma comparing KYPROLIS, melphalan, and prednisone (KMP) vs bortezomib, melphalan, and prednisone (VMP), a higher incidence of serious and fatal adverse events was observed in patients in the KMP arm.  KYPROLIS in combination with melphalan and prednisone is not indicated for transplant‐ineligible patients with newly diagnosed multiple myeloma.

Embryo-fetal Toxicity

• KYPROLIS can cause fetal harm when administered to a pregnant woman based on its mechanism of action and findings in animals.
• Females of reproductive potential should be advised to avoid becoming pregnant while being treated with KYPROLIS. Males of reproductive potential should be advised to avoid fathering a child while being treated with KYPROLIS. If this drug is used during pregnancy, or if pregnancy occurs while taking this drug, the patient should be apprised of the potential hazard to the fetus.

ADVERSE REACTIONS

• The most common adverse reactions occurring in at least 20% of patients treated with KYPROLIS in the combination therapy trials: anemia, neutropenia, diarrhea, dyspnea, fatigue, thrombocytopenia, pyrexia, insomnia, muscle spasm, cough, upper respiratory tract infection, hypokalemia.
• The most common adverse reactions occurring in at least 20% of patients treated with KYPROLIS in monotherapy trials: anemia, fatigue, thrombocytopenia, nausea, pyrexia, dyspnea, diarrhea, headache, cough, edema peripheral.

Please see full prescribing information at www.kyprolis.com.

About Amgen's Commitment to Oncology
Amgen Oncology is committed to helping patients take on some of the toughest cancers, such as those that have been resistant to drugs, those that progress rapidly through the body and those where limited treatment options exist. Amgen's supportive care treatments help patients combat certain side effects of strong chemotherapy, and our targeted medicines and immunotherapies focus on more than a dozen different malignancies, ranging from blood cancers to solid tumors. With decades of experience providing therapies for cancer patients, Amgen continues to grow its portfolio of innovative and biosimilar oncology medicines.

About Amgen
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 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 one of the world's leading independent biotechnology companies, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential.

For more information, visit www.amgen.com and follow us on www.twitter.com/amgen.

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Velcade® (bortezomib) is a registered trademark of Millennium Pharmaceuticals, Inc.

References

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