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Blood, 1 October 2007, Vol. 110, No. 7, pp. 2296-2301. Prepublished online as a Blood First Edition Paper on July 3, 2007; DOI 10.1182/blood-2007-02-075960.
Submitted February 21, 2007
Gaucher Clinic, Shaare Zedek Medical Center, Jerusalem, Israel * Corresponding author; email: elstein{at}szmc.org.il.
Enzyme Replacement Therapy (ERT) with imiglucerase reduces hepatosplenomegaly and improves hematological parameters in Gaucher disease type 1 (GD1), within 6-24 months. Miglustat reduces organomegaly, improves hematological parameters and reverses bone-marrow infiltration. This trial evaluates miglustat in patients clinically stable on ERT. Tolerability of miglustat and imiglucerase, alone and in combination, pharmacokinetic profile, organ reduction, and chitotriosidase activity were assessed. Thirty-six patients stable on imiglucerase were randomized into this phase II, open-label trial. Statistically significant changes from baseline were assessed (paired t-test) on primary objectives with secondary analyses on biochemical and safety parameters. Liver and spleen volume were unchanged in switched patients. No significant differences were seen between groups regarding mean change in hemoglobin. Mean change in platelet counts was only significant between miglustat and imiglucerase groups (p=0.035). Chitotriosidase activity remained stable. In trial extension, clinical endpoints were generally maintained. Miglustat was well tolerated alone or in combination. Miglustat's safety profile was consistent with previous trials, moreover no new cases of peripheral neuropathy were observed. GD1 parameters were stable in most switched patients. Combination therapy did not show benefit. Findings suggest miglustat could be an effective maintenance therapy in stabilized patients with GD1.
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