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An Extension Study to Assess the Long-term Safety and Efficacy of Hunterase (Idursulfase Beta)

An Extension Study to Assess the Long-term Safety and Efficacy of Hunterase (Idursulfase Beta) in Patients With Hunter Syndrome

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07344376
Enrollment
30
Registered
2026-01-15
Start date
2018-05-23
Completion date
2022-12-30
Last updated
2026-01-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

GC1111, Hunterase, Hunter Syndrome, Hunter Syndrome (MPS II), MPS II

Keywords

Hunterase, GC1111, GC Biopharma, Long-term study, extension study

Brief summary

The objective of this study is to assess the long-term safety and efficacy of Hunterase for approximately 1 year in subjects who completed the end of study (EOS) visit (Visit 54) tests in the Phase 3 Hunterase study and patients who received Hunterase for more than 6 months

Interventions

0.5mg/kg weekly IV administration

Sponsors

Samsung Medical Center, Sungkyunkwan University School of Medicine
CollaboratorUNKNOWN
GC Biopharma Corp
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Phase 3 Extension study

Eligibility

Sex/Gender
MALE
Healthy volunteers
No

Inclusion criteria

1. Subject diagnosed with Hunter syndrome (MPS II) who completed activities at the EOS visit (Visit 54) in the GC1111\_P3 study 2. (Subject who did not participate in the GC1111\_P3 study) Subject diagnosed with Hunter syndrome (MPS II) who received Hunterase for more than 6 months 3. (Subjects who did not participate in the GC1111\_P3 study) Males aged ≥ 5 4. Informed consent form voluntarily signed by the subject or by a legally acceptable representative 5. Subject who agrees to use contraception

Exclusion criteria

1. Subject with hypersensitivity to any of the ingredients of the investigational product 2. Subject impossible to perform follow-up observation of the safety 3. Subject who received the treatment with another investigational product within 14 days prior to the start of study drug 4. Subject who plans to be treated with another investigational product during the study period 5. Subject who has history of tracheostomy, bone marrow transplant, or cord blood transplant 6. Any other inappropriate conditions for study participation at the investigator's discretion

Design outcomes

Primary

MeasureTime frameDescription
Laboratory tests (CBC, Chemistry, Urinanalysis)Every visit until 12monthsAbnormality of Laboratory tests results
Physical examinationEvery visit until 12monthsAbnormality of physical examination
Adverse EventEvery visit until 12monthsoccurence, grade
ElectrocardiographyEvery 6 months until 12monthsAbnormality of ECG results

Secondary

MeasureTime frameDescription
6-minute walk testEvery 4months until 12monthsMean, Change and percent change of 6-minute walk test
Urine GAG (Heparan sulfate, Dermatan sulfate)Every visit until 12monthsMean, Change and percent change of Urine HS/DS

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 10, 2026