A Study of JR-141 in Patients With Mucopolysaccharidosis II (BR21)

NCT ID: NCT03359213

Last Updated: 2025-07-24

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 18 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-07-26
• Study Completion Date: 2019-10-04

Brief Summary

A Phase II open-label, randomized, parallel group, 2 sites (Brazil), designed to evaluate the safety and efficacy of 3 doses of study drug for the treatment of the MPS II.

Conditions

Mucopolysaccharidosis II

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

JR-141 1.0 mg/kg/week

Group Type: EXPERIMENTAL

JR-141

Intervention Type: DRUG

IV infusion (lyophilized powder), 1.0 mg/kg/week

JR-141 2.0 mg/kg/week

Group Type: EXPERIMENTAL

JR-141

Intervention Type: DRUG

IV infusion (lyophilized powder), 2.0 mg/kg/week

JR-141 4.0 mg/kg/week

Group Type: EXPERIMENTAL

JR-141

Intervention Type: DRUG

IV infusion (lyophilized powder), 4.0 mg/kg/week

Interventions

JR-141

IV infusion (lyophilized powder), 1.0 mg/kg/week

Intervention Type: DRUG

JR-141

IV infusion (lyophilized powder), 2.0 mg/kg/week

Intervention Type: DRUG

JR-141

IV infusion (lyophilized powder), 4.0 mg/kg/week

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Males with confirmed diagnosis of MPS II, based on deficient activity of IDS in leucocytes or fibroblasts and/or pathogenic mutations identified in the IDS gene (if enzyme diagnosis was in dried blood spots or plasma, molecular genetics confirmation is mandatory).
• One of the following age groups:

1. 0 to 3 years and 11 months old (6 patients, 2 in each dose)

2. 4 years to 7 years and 11 months old (6 patients, 2 in each dose)

3. 8 years or older (6 patients, 2 in each dose)

• Capable of providing written consent by himself, unless the patient is under the age of 18 years at the time of informed consent process, or it is not possible to obtain consent from the patient himself due to his intellectual disabilities associated with MPS II.
• In the case of a patient who is under the age of 18 years or from whom it is not possible to obtain consent due to his intellectual disabilities associated with MSP II, he may be included if written consent can be provided by legal representative; however written consent should be obtained from the patient himself too, wherever possible.
• Naïve patients or patients who are receiving enzyme replacement therapy with idursulfase could be included if provided treatment has been stable in the last 6 months and agree to interrupt the treatment at least one week before the first study drug infusion, and agree in suspending this treatment for the duration of the trial.

Exclusion Criteria

• Refusal to sign the informed consent form.
• Unable to perform the study procedures, except for neurocognitive testing.
• Previous engrafted BMT/HSCT.
• Surgical or other major medical intervention planned to occur before week 26.
• Participation in a clinical trial with an investigational drug in the last 12 months.
• Judged by the investigator or subinvestigator as being unable to undergo lumbar puncture, including those who have difficulties in taking a position for lumber puncture due to joint contracture or those who are likely to experience difficulty breathing during the lumbar puncture process.
• Judged by the investigator or subinvestigator to be ineligible to participate in the study due to a history of a serious drug allergy or sensitivity.
• Otherwise judged by the investigator or subinvestigator to be ineligible to participate in the study out of consideration for the subject safety.

• Minimum Eligible Age: 0 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

JCR Pharmaceuticals Co., Ltd.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Grupo de Pesquisa Clínica em Genética Médica - HCPA

Porto Alegre, , Brazil

Igeim - Unifesp

São Paulo, , Brazil

Countries

Brazil

Other Identifiers

JR-141-BR21

Identifier Type: -

Identifier Source: org_study_id