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On October 22, 2026, Glafabra requested Rare Pediatric Disease Designation for GT-GLA-S03 in juvenile-onset Fabry disease; FDA acknowledged receipt on October 23 and has not given a timeline for its decision. GT-GLA-S03 already holds Orphan Drug Designation for Fabry disease (granted March 8, 2026). The request rests on published pediatric natural-history data: in the Fabry Registry's 352 patients under 18, neuropathic pain began at a median age of 7 in boys and 9 in girls; in the prospective MOPPet study, first symptoms in boys with classic variants appeared at a mean of 23 months; and pediatric kidney biopsies show injury before standard tests detect it.
Interpretation: The serious manifestations of classic Fabry begin in childhood, yet today's options for children are a biweekly infusion for life or, for a minority with amenable variants, an oral drug currently labeled in the U.S. for adults. A therapy designed as a single procedure could matter most for the youngest patients.
Uncertainty: FDA may not grant the designation, and a designation is not an approval. Live-cel has not yet been studied in children; the FACTS pilot enrolled adult men, and the U.S. trial design will be set with FDA at the Pre-IND stage.
Questions about the pediatric strategy? Post them below.
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