In the study, grade 3 and 4 adverse events included neutropenia (14%), lymphopenia (14%) and thrombocytopenia (13%). The overall rate of treatment-emergent grade 3/4 adverse events was 56%. The overall rate of grade 3/4 elotuzumab-related adverse events was 24%. Of patients with infusion-related reactions, one patient (1.6%) experienced grade 3 rash within 24 hours of treatment with elotuzumab. There were no grade 4 infusion-related adverse events. The most common elotuzumab-related adverse events were fatigue (21%), pyrexia (14%), lymphopenia (11%), nausea (11%) diarrhea (11%), constipation (10%) and neutropenia (10%).
Multiple myeloma is the second most common blood cancer in the United States, with a 5-year survival rate of approximately 35%. Elotuzumab is an investigational humanized monoclonal antibody specifically directed against CS1, a cell-surface glycoprotein that is highly and uniformly present on multiple myeloma cells.
Paul G. Richardson, M.D. Clinical Director, Jerome Lipper Center for Multiple Myeloma, Dana-Farber Cancer Institute, lead author and investigator on the study said, There remains a need for more effective and tolerable treatment options for patients with relapsed multiple myeloma, as almost all patients eventually relapse and require further therapy.
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