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Phase I study of weekly infusion of JR-441 in patients with mucopolysaccharidosis type IIIA

Phase I study of weekly infusion of JR-441 in patients with mucopolysaccharidosis type IIIA

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2071240053
Enrollment
3
Registered
2024-08-26
Start date
2024-10-08
Completion date
Unknown
Last updated
2026-06-29

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

Conditions

Mucopolysaccharidosis IIIA

Interventions

JR-441 is administered intravenously at low, medium, or high doses once a week.

Sponsors

Konaka Tadashi
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Chronological age of 1 year or older and under 18 years at the time of signing ICF - A subject with a diagnosis of MPS IIIA at the time of ICF - A subject with a minimal body weight of 10 kg at the time of screening

Exclusion criteria

Exclusion criteria: - Prior experience to gene therapy or Hematopoietic stem cell transplantation with successful engraftment - Past use of another investigational drug or product in last 4 months or 5 half-lives (whichever is longer) before signing ICF - Current participation in a clinical trial or past participation (within 30 days of enrolment into this study) in a study involving invasive procedures - Past use of Genistein or Kineret (anakinra) within 4 months before signing ICF - Serious drug allergy or hypersensitivity The above information is not intended to contain all considerations relevant to a patient's potential participation in this clinical trial.

Design outcomes

Primary

MeasureTime frame
- Incidence and severity of treatment-emergent adverse events - Change in safety laboratory tests - Change in vital signs - Abnormality in 12-lead electrocardiogram [Timeframe: Over the study period]

Secondary

MeasureTime frame
- Immunogenicity of JR-441 in plasma, as measured by the expression of anti-drug antibodies against JR-441 - Changes from baseline in oncentration of heparan sulfate in serum and urine [Timeframe: Over the study period] - Plasma drug concentrations and pharmacokinetics parameters [Timeframe: Multiple time points, including the point of administration of the maximum dose] - Changes from baseline in concentrations of heparan sulfate, ganglioside-monosialic acid 2, and ganglioside-monosialic acid 3 in cerebrospinal fluid [Timeframe: Baseline to Week 53]

Contacts

Public ContactTadashi Konaka

JCR Pharmaceuticals Co., Ltd.

clinical_development@jp.jcrpharm.com+81-797-32-8582

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026