Conditions: Late Infantile Metachromatic Leukodystrophy
Keywords: Metazyme Late Infantile Metachromatic Leukodystrophy
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 11
Healthy volunteers: no

Brief summary:
This is a multi-center, open-label, extension study of patients with late infantile MLD who have previously completed clinical study HGT-MLD-048 (NCT00633139), defined as the completion of all Week 52 procedures. This group of patients will be offered ongoing treatment with HGT-1111 in this protocol. One infusion will be given every other week until the product is commercially available, the patient discontinues, or the study is terminated by the Sponsor, provided no safety issues have emerged.

Detailed description:
The primary objective of this study is to provide ongoing treatment of HGT-1111 to patients who have completed study HGT-MLD-048 (previously study rhASA-03 - NCT00633139) until HGT-1111 is commercially available or the study is terminated by the Sponsor, provided no safety concerns have emerged. The secondary objective of this study is to monitor disease progression and the safety profile of HGT-1111 administered to patients who have completed study HGT-MLD-048 (NCT00633139).

Arms:
arm 1: None arm 2: None

Interventions: intervention 1: HGT-1111
Intervention descriptions: intervention 1: Patients currently dosed with 100 U/kg or 200 U/kg will continue this treatment. Patients dosed with 50 U/kg will be equally randomized to treatment on 100 U/kg or 200 U/kg. The dose will be adjusted every 6-week to account for changes in body weight.The infusion length will be dependent on the dose. Infusion of 100 U/kg will be diluted in 50 ml isotonic sodium chloride and infused over 30 minutes. Infusion of 200 U/kg will be administered in the same manner except for an infusion time of 60 minutes.

Protocol document: