on-term study of idursulfase beta in patients with mucopolysaccharidosis type II

Phase 3

• Conditions: Mucopolysaccharidosis type II; D016532

• Registration Number: JPRN-jRCT2031220250
• Lead Sponsor: Yanagi Komei

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2022-08-07
• Last Update Posted: 17 October 2023

Recruitment & Eligibility

• Status: Complete
• Sex: Male
• Target Recruitment: 6

Inclusion Criteria

Patients who met all of the following criteria 1) to 4) or who met 5) were included in this study.
1) Patients with confirmed diagnosis of severe mucopolysaccharidosis type II (type C or D)
The diagnosis of severe mucopolysaccharidosis type II is confirmed when both of the following are satisfied.
- The activity of isulonate 2-sulfatase in leukocytes is low or below the limit of quantification, and the amount of uronic acid excreted in urine exceeds the standard value.
- Has a severe type of gene mutation that is thought to reduce the activity of isulonate 2-sulfatase.
2) Male patients aged 6 months to under 15 years
3) Patients who have never received hematopoietic stem cell transplantation in the past
4) Patients who received idursulfase intravenously for 12 weeks or more before the start of the study (the total number of doses for the 12 weeks before the start of the study was 10 or more, and it was confirmed that there was no problem with tolerability)
5) atients who have been treated with idursulfase beta in the BHP001 study and wish to continue treatment after approval (patients who are judged by the principal investigator or co-investigator to be beneficial to continue treatment)

Exclusion Criteria

Patients who met any of the following, even if they met the selection criteria, were not included in this study.
1) Patients whose urinary uronic acid level is 50 times or more the upper limit of the age-specific standard
2) Patients who underwent ventricular/intraperitoneal shunt
3) Patients with end-stage organ dysfunction and other serious illnesses
4) Patients with malignant neoplasms
5) Patients with a history of anaphylactic shock in the components of the investigational drug
6) Other patients who are judged to be ineligible by the principal investigator or co-investigator

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
[Exploratory effectiveness evaluation items]<br>1) Heparan sulfate concentration in cerebrospinal fluid<br>2) Developmental age<br>[Safety evaluation items]<br>1) Adverse events<br>2) Clinical tests and vital signs