Can a weekly brain infusion slow sanfilippo syndrome?

NCT ID NCT07733856

First seen Jul 29, 2026 · Last updated Jul 30, 2026 · Updated 1 time

Summary

This early-access program tests whether a weekly infusion of tralesinidase alfa directly into the brain's fluid spaces is safe and tolerable for children with Sanfilippo syndrome type B, a rare genetic disorder that causes severe neurological decline. The study enrolls about 10 children, including those as young as 12 months, and treats them for up to a year. The goal is to provide early access to a potential therapy while gathering safety data.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance
tralesinidase alfa given directly into the brain's fluid spaces
What this could lead to
If it works, this could provide a treatment option for children with Sanfilippo syndrome type B, a rare and devastating genetic disease that currently has no approved therapy.
What could go wrong
This is a small, early-access program, not a controlled trial, so results may be limited. The treatment requires weekly infusions into the brain, which carries risks like infection or bleeding.

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Conditions

The condition(s) this trial relates to.

Mucopolysaccharidosis III mucopolysaccharidosis type 3B

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.