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A Phase I/II Trial of JR-446 in Mucopolysaccharidosis Type IIIB (MPS IIIB)

18. september 2026 oppdatert av: JCR Pharmaceuticals Co., Ltd.

A Global, Open-Label, Phase I/II Trial, to Evaluate Safety, Tolerability, Pharmacodynamic and Preliminary Efficacy of JR-446 in Mucopolysaccharidosis Type IIIB (MPS IIIB)

This is a global, open-label, Phase I/II, interventional trial in participants younger than 6 years of age with Mucopolysaccharidosis Type IIIB (MPS IIIB), designed to assess the safety and tolerability of JR-446, determine its pharmacodynamic effects, and explore its potential to demonstrate early clinical effects on disease-relevant outcomes.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

12

Fase

  • Fase 2
  • Fase 1

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

  • Forente stater
    • California
      • Oakland, California, Forente stater, 94609
        • Rekruttering
        • Children's Hospital Oakland Research Institution, Attn: 2900 Wing
        • Ta kontakt med:
    • Pennsylvania
      • Pittsburgh, Pennsylvania, Forente stater, 15224
        • Har ikke rekruttert ennå
        • UPMC Children's Hospital of Pittsburgh
        • Ta kontakt med:
    • Virginia
      • Fairfax, Virginia, Forente stater, 22030
        • Har ikke rekruttert ennå
        • Lysosomal and Rare Disorders Research and Treatment Center (LDRTC)
        • Ta kontakt med:
  • Storbritannia
      • London, Storbritannia, WC1N 3JH
        • Har ikke rekruttert ennå
        • Great Ormond Street Hospital for Children
        • Ta kontakt med:
  • Tyskland
      • Hamburg, Tyskland, 20246
        • Har ikke rekruttert ennå
        • University Medical Center Hamburg-Eppendorf
        • Ta kontakt med:
          • Nicole Maria Muschol
          • Telefonnummer: +49 (0) 40 7410 53714
          • E-post: muschol@uke.de

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

Ikke eldre enn 5 år (Barn)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  1. Patients with confirmed MPS IIIB with a phenotype of MPS IIIB that is not classified as slowly progressive (i.e., not attenuated).
  2. A chronological age <6 years.
  3. Ability to complete and achieve a Standard score ≥55, using either Bailey Scale of Infant Development-4 (BSID-4) Cognitive domain or Kaufman Assessment Battery for Children-II (KABC-II) Non-Verbal Index, whichever tool is most appropriate for the participant's chronological age.

Exclusion Criteria:

  1. Contraindication for lumbar puncture or MRI.
  2. A participant who has a medical condition or extenuating circumstance that, in the opinion of the principal investigator or sub-investigator, might compromise the participant's ability to comply with protocol requirements, the participant's well-being or safety, or the interpretability of the participant's clinical data.
  3. A participant who has received any other investigational drug product (including but not limited to, tralesinidase alfa enzyme replacement therapy [TA-ERT], Genistein, KINERET [anakinra], ambroxol, miglustat) within 4 months (or 5 half-lives, whichever is longer) before the time of providing informed consent.
  4. A participant who has received gene therapy treatment or hematopoietic stem cell transplantation (HSCT) with successful engraftment.
  5. Serious drug allergy or hypersensitivity to any components of JR-446 or medications likely prescribed during the trial.
  6. A participant has a history of bleeding disorder or current use of medications that, in the opinion of the investigator, place them at risk of bleeding following lumbar puncture.
  7. A patient with recurrent epileptic seizures not adequately controlled with anti-seizure medication, and which, in the clinical judgment of the principal investigator, would preclude safe participation in the trial.
  8. Serology consistent with human immunodeficiency virus (HIV) exposure or consistent with active hepatitis B (HepB) or hepatitis C (HepC) infection.
  9. A participant/family, who, in the opinion of the investigator, may not be able to comply with protocol requirements and cooperate fully with the trial assessments, procedures, and scheduling for JR-446 IMP dose administrations.
  10. Study participants for whom informed consent is unable to be provided by a parent or legal guardian; or when applicable for a study participant who is unable to provide assent with respect to study participation in conjunction with parental or legal guardian consent for participation on study.

The above information is not intended to contain all considerations relevant to a patient's potential participation in this clinical trial.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: JR-446

Arm: 1
Legemiddel: JR-446

IV infusion

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
To establish the safety and tolerability of JR-446 in MPS IIIB patients following repeated dose administration
Tidsramme: Up to 1 year (multiple visits)

Incidence and severity of treatment-emergent adverse events; Incidence and severity of infusion-associated reactions; Incidence of clinically significant changes/abnormalities in safety laboratory tests, vital signs, and electrocardiogram.
Up to 1 year (multiple visits)

Sekundære resultatmål

Resultatmål
Tidsramme
Change From Baseline in Cerebrospinal Fluid Heparan Sulfate Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Absolute Change From Baseline in Serum Heparan Sulfate Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Percent Change From Baseline in Serum Heparan Sulfate Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Absolute Change From Baseline in Urine Heparan Sulfate Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Percent Change From Baseline in Urine Heparan Sulfate Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Absolute Change From Baseline in Serum Neurofilament Light Chain Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Percent Change From Baseline in Serum Neurofilament Light Chain Concentration
Tidsramme: Through Week 53 (up to 1 year; multiple visits)
Through Week 53 (up to 1 year; multiple visits)
Change in Cognitive Function Assessments From Baseline
Tidsramme: Through Week 53 (up to 1 year)
Through Week 53 (up to 1 year)
Change in Brain MRIs From Baseline
Tidsramme: Through Week 53 (up to 1 year)
Through Week 53 (up to 1 year)
Change in Height Standard Deviation Score (SDS) From Baseline (using WHO child growth standards)
Tidsramme: Through Week 53 (up to 1 year)
Through Week 53 (up to 1 year)
Change in Weight SDS From Baseline (using WHO child growth standards)
Tidsramme: Through Week 53 (up to 1 year)
Through Week 53 (up to 1 year)
Change in Body Mass Index (BMI) SDS From Baseline (using WHO child growth standards)
Tidsramme: Through Week 53 (up to 1 year)
Through Week 53 (up to 1 year)

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

JCR Pharmaceuticals Co., Ltd.

Samarbeidspartnere

MEDIPAL HOLDINGS CORPORATION

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

9. september 2026

Primær fullføring (Antatt)

30. juni 2028

Studiet fullført (Antatt)

30. september 2028

Datoer for studieregistrering

Først innsendt

14. mai 2026

Først innsendt som oppfylte QC-kriteriene

8. juni 2026

Først lagt ut (Faktiske)

11. juni 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

21. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

18. september 2026

Sist bekreftet

1. juli 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • JR-446-201

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Ja

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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