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

> **NCT07640984** · PHASE1,PHASE2 · RECRUITING · sponsor: **JCR Pharmaceuticals Co., Ltd.** · enrollment: 12 (estimated)

## Conditions studied

- Mucopolysaccharidosis IIIB

## Interventions

- **DRUG:** JR-446

## Key facts

- **NCT ID:** NCT07640984
- **Lead sponsor:** JCR Pharmaceuticals Co., Ltd.
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1,PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2026-09-09
- **Primary completion:** 2028-06-30
- **Final completion:** 2028-09-30
- **Target enrollment:** 12 (ESTIMATED)
- **Last updated:** 2026-09-21

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07640984

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07640984, "A Phase I/II Trial of JR-446 in Mucopolysaccharidosis Type IIIB (MPS IIIB)". Retrieved via MORVS 2026-10-20 from https://api.morvs.ai/clinical/NCT07640984. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*