Genzyme Announces Phase 3 Trial of Mozobil in non-Hodgkin's Lymphoma Meets Primary Endpoint
Genzyme Corp. announced that it has successfully completed its phase 3 trial of MozobilTM (plerixafor) in non-Hodgkin's lymphoma (NHL), and that the trial has robustly met its primary and secondary endpoints.
The randomized, double-blind, placebo-controlled trial included 298 patients who were undergoing a hematopoietic stem cell transplant (HSCT) for NHL at medical centers in the United States and Canada. It examined the effectiveness of Mozobil in increasing the number of hematopoietic stem cells collected for a transplant. The study compared the hematopoietic stem cell yield from patients treated with Mozobil in combination with G-CSF to patients treated with G-CSF in combination with placebo. G-CSF is the standard of care for stimulating the mobilization of stem cells from the bone marrow; Mozobil is designed to allow for the more rapid and effective release of those stem cells from the marrow into the circulating blood for collection by apheresis.
In the primary efficacy endpoint, 59 percent of patients treated with a combination of Mozobil and G-CSF achieved the target threshold for collection of at least 5 million CD34+cells/kg from the peripheral blood with four or fewer days of apheresis sessions, compared with 20 percent of patients in the G-CSF/placebo group. The three-fold increase was highly statistically significant in favor of the Mozobil-treated patients (p<0.0001). The 40 percent absolute difference between the two treatment groups was nearly double the target that Genzyme prospectively defined in the protocol for the study, which was reviewed by FDA as part of the Special Protocol Assessment process.
In the secondary efficacy endpoint, nearly 87 percent of patients treated with Mozobil and G-CSF achieved the minimum level of stem cells generally associated with a successful transplant (2 million CD34+cells/kg) in four or fewer days of apheresis sessions, compared with approximately 47 percent in the placebo arm. This result was also highly statistically significant in favor of the Mozobil-treated patients (p<0.0001).
Mozobil, a small molecule CXCR4 chemokine antagonist, has been shown in multiple earlier studies to rapidly and effectively increase the number of stem cells in circulation in the blood. Once circulating in the blood, stem cells can be collected for use in a stem cell transplant. Mozobil has been granted special protocol assessment and orphan drug status in the United States and European Union and the pivotal trials have undergone Special Protocol Assessment by the FDA and Protocol Assistance by the EMEA. Genzyme intends to commercialize Mozobil through its existing global transplant business to hematologists and hematopoietic stem cell transplant centers in more than 50 countries throughout the world. Genzyme has been developing Mozobil since its acquisition of AnorMED, Inc. in 2006.
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