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Genzyme Corporation (NASDAQ: GENZ) today announced three-year follow-up data from patients enrolled in the phase 2 clinical trial for its investigational oral therapy for Gaucher disease type 1 known as eliglustat tartrate. Sustained or further improvements were observed across all endpoints, including bone disease, at the three-year timepoint. The results were presented for the first time this week at the Lysosomal Disease Network WORLD Symposium in Las Vegas, Nevada.
Genzyme previously reported that the eliglustat tartrate phase 2 trial had met its primary endpoint at one year, and that data demonstrated continued improvement through two years. The primary composite endpoint was a clinically meaningful response in at least two of three endpoints: improvements in spleen size, hemoglobin and platelet levels. The study has continued with 19 patients through three years. The extension phase of this trial is still ongoing.
Eliglustat tartrate continued to show robust clinical response through three years:
Spleen volume decreased from baseline by a mean of 61 percent and liver volume decreased from baseline by 29 percent.
Hemoglobin level increased from baseline by a mean of 2.6 grams per deciliter.
Platelet count increased from baseline by a mean of 91 percent.
The study also analyzed the clinical response of patients in the phase 2 trial with respect to achieving therapeutic goals. Due to the heterogeneity of Gaucher disease, therapeutic goals were previously developed by experts involved in the treatment of Gaucher patients to assess their response to enzyme replacement therapy (ERT). Most patients dosed with eliglustat tartrate met established therapeutic goals for hemoglobin, platelets, spleen volume and liver volume, demonstrating progressive and clinically meaningful responses in multiple organ systems. At three years, 100 percent of patients met at least 3 of the 4 therapeutic goals developed for hematologic and organ volume parameters.