NCT03041324

Ascending Dose Study of Genome Editing by the Zinc Finger Nuclease (ZFN) Therapeutic SB-913 in Subjects With MPS II

A Phase I / 2, Multicenter, Open-label, Single-dose, Dose-ranging Study to Assess the Safety and Tolerability of SB-913, a rAAV2/6-based Gene Transfer in Subjects With Mucopolysaccharidosis II (MPS II)

• Status: Terminated
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 9 (actual)
• Sponsor: Sangamo Therapeutics · Industry
• Sex: All
• Age: 5 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The purpose of the study is to evaluate the safety, tolerability and effect on leukocyte and plasma Iduronate 2-Sulfatase (IDS) enzyme activity of ascending doses of SB-913. SB-913 is an intravenously delivered Zinc Finger Nuclease (ZFN) Therapeutic for genome editing. It inserts a correct copy of the IDS gene into the Albumin locus in hepatocytes with the goal of lifelong therapeutic production of the IDS enzyme.

Detailed description

The objectives of the study are to provide long term expression of IDS and improve the current clinical outcome of enzyme replacement therapy (ERT) in subjects with MPS II, a recessive lysosomal storage disorder that results from mutations in the gene encoding IDS. SB-913 is a therapeutic for ZFN-mediated genome editing which will be delivered by adeno-associated virus (AAV)-derived vectors. SB-913 is intended to function by placement of the corrective copy of IDS transgene into the genome of the subject's own hepatocytes, under the control of the highly expressed endogenous albumin locus, and is expected to provide permanent, liver-specific expression of Iduronate 2-Sulfatase for the lifetime of an MPS II patient.

Conditions

• Mucopolysaccharidosis II
• MPS II

Interventions

Type	Name	Description
BIOLOGICAL	SB-913	Single dose of each of the 3 components of SB-913: ZFN1, ZFN2 and hIDS Donor

Timeline

• Start date: 2017-05-11
• Primary completion: 2021-05-07
• Completion: 2021-05-07
• First posted: 2017-02-02
• Last updated: 2022-10-25
• Results posted: 2022-09-27

Locations

5 sites across 1 country: United States

Regulatory

• FDA-regulated drug study