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GBT announces positive top-line data from part A of the phase 3 HOPE study of Voxelotor in sickle cell disease

Global Blood Therapeutics, Inc. today announced the completion of a planned review of Part A of the Phase 3 HOPE (Hemoglobin Oxygen Affinity Modulation to Inhibit HbS PolymErization) Study, which is evaluating voxelotor for the treatment of sickle cell disease (SCD). On the primary endpoint (the proportion of patients with greater than 1 g/dL increase in hemoglobin versus baseline), a statistically significant increase was demonstrated with voxelotor at both the 1500 mg and 900 mg doses after 12 weeks of treatment versus placebo.

The independent Data and Safety Monitoring Board (DSMB) completed its most recent clinical safety review in May 2018 and did not identify safety concerns with voxelotor at either dose level across all patients dosed in the ongoing SCD clinical program, including adult patients in the Phase 3 HOPE Study and adolescent patients in the HOPE-KIDS 1 (GBT440-007) Study. The DSMB supported the initiation of dosing in children as young as age 4.