Photo courtesy of Amgen
The European Medicines Agency’s Committee for Medicinal Products for Human Use (CHMP) has issued a positive opinion of the proteasome inhibitor carfilzomib (Kyprolis).
The CHMP is recommending the drug be approved for use in combination with lenalidomide and dexamethasone to treat adults with multiple myeloma (MM) who have received at least 1 prior therapy.
The CHMP’s positive opinion will be reviewed by the European Commission (EC).
The EC usually follows the CHMP’s recommendations and is expected to deliver its final decision within 3 months. The EC’s decision will apply to the 28 member countries of the European Union (EU), as well as Iceland, Lichtenstein, and Norway.
ASPIRE trial
The CHMP’s positive opinion of carfilzomib was based on data from the phase 3 ASPIRE trial, which were presented at ASH 2014 and published in NEJM.
The trial enrolled 792 patients with relapsed or refractory MM who had received 1 to 3 prior lines of therapy. The patients were randomized (1:1) to receive carfilzomib plus lenalidomide and dexamethasone (KRd) or just lenalidomide and dexamethasone (Rd) for 18 cycles.
Lenalidomide and dexamethasone were continued thereafter until disease progression. There was no planned cross-over from the control arm to treatment with carfilzomib.
The study’s primary endpoint was progression-free survival. And the median progression-free survival was significantly longer in the KRd arm than the Rd arm—26.3 months and 17.6 months, respectively (hazard ratio=0.69, P=0.0001).
At the time of analysis, the difference in overall survival did not reach the prespecified boundary for statistical significance.
The overall response rate was 87% in the KRd arm and 67% in the Rd arm. The median duration of response was 28.6 months and 21.2 months, respectively.
The rates of death due to adverse events (AEs) within 30 days of the last dose were similar between the treatment arms.
The most common causes of death not due to progressive disease occurring in patients in the KRd arm and the Rd arm, respectively, were cardiac disorders (3% vs 2%), infection (2% vs 3%), renal events (0% vs less than 1%), and other AEs (2% vs 3%).
Serious AEs were reported in 60% of the patients in the KRd arm and 54% in the Rd arm. The most common serious AEs reported in the KRd arm and the Rd arm, respectively, were pneumonia (14% vs 11%), respiratory tract infection (4% vs 2%), pyrexia (4% vs 2%), and pulmonary embolism (3% vs 2%).
Carfilzomib development
Carfilzomib was granted orphan drug designation in the EU in 2008. Last February, the drug’s application for EU approval was granted accelerated assessment.
Carfilzomib was approved as monotherapy in the US in July 2012 and in combination with lenalidomide and dexamethasone in July 2015. Carfilzomib is also approved for use in Argentina, Israel, Kuwait, Mexico, and Thailand.
Carfilzomib is a product of Onyx Pharmaceuticals, Inc., a subsidiary of Amgen that holds development and commercialization rights to the drug globally, excluding Japan. For more information on the drug, visit www.kyprolis.com.
