Clin2
NCT05492799Possibly a fitEnrolling by invitation

Study of AX 250 for MPS IIIB in children

MPS III B

Part of Genetic & congenital, Hormones & metabolism, Skin clinical trials.

This Phase 4 trial studies how safe, tolerable, and helpful ICV AX 250 is for people with MPS IIIB. It is for participants who already finished a prior AX 250 study and meet specific health and eligibility checks.

Summary written for real people, not researchers, by Clin2.

Phase
Phase 4
Enrollment
15 people
Ages
Any age
Study type
Interventional

Who can take part

  • You must have already completed 240 weeks of the earlier Study 250-202 and start the next study within 8 weeks after stopping dosing
  • A parent or legal guardian must sign consent, and your child must also assent if required
  • Your study team must believe you can follow all study visits and instructions
  • If the participant is a female who could become pregnant: you must have a negative pregnancy test at screening and agree to repeat tests during the study
  • You must not have very low thinking/development scores and must have shown improvement on prior study outcomes (not just stable results)

View the official record on ClinicalTrials.gov

Quick eligibility check

Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.

Similar studies

Other trials that look related to this one.

NCT07640984Recruiting· Phase 1/Phase 2
Gene therapy for rare childhood brain disorder MPS IIIB

This early-stage trial tests JR-446, a new treatment for MPS IIIB, a rare genetic disorder that affects the brain and body. The treatment is delivered directly into the fluid around the spinal cord and aims to slow or improve symptoms in young children.

Oakland, California
NCT07733856AVAILABLE
Early access treatment for Sanfilippo syndrome type B

This program provides early access to an experimental enzyme therapy given directly into the brain for children with Sanfilippo syndrome type B, a genetic condition that affects the nervous system. The treatment aims to replace a missing enzyme to slow or stabilize symptoms.

Oakland, California
NCT06075537Enrolling by invitation· Phase 2/Phase 3
Long-term safety study of a MPS II treatment

This study is for people with MPS II (Hunter syndrome) who have already completed a previous Denali study. It will test a drug called tividenofusp alfa (DNL310) over a longer period to see how safe it is and how well it works.

Oakland, California
NCT05594992Enrolling by invitation· Phase 3
Study extension of JR-141 for long-term Hunter syndrome safety

This is a follow-up study for people who already took JR-141 in an earlier trial for Hunter syndrome (MPS II). It checks how well the treatment works over the long term and monitors long-term safety.

Oakland, California
NCT06519552Recruiting· Phase 1
Gene therapy study for adults with MPS type I

This study tests a new gene therapy called JWK008 for adults with MPS type I. The goal is to see if it is safe and can help improve symptoms. You may be able to join if you are 18 or older and have not had serious side effects from enzyme replacement therapy.

Chengdu, Sichuan
NCT07712003Not yet recruiting
Study of disease progression in people with MPS IIIC

This study follows people with MPS IIIC over time to learn more about how the disease progresses. It does not test a new treatment, but the information may help with future care and research.

Dallas, Texas

Hear when a new MPS III B trial opens

We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.