X4 Pharma Gets Rare Pediatric Disease Status
FDA has granted X4 Pharmaceuticals a rare pediatric disease designation for mavorixafor for treating WHIM (Warts, Hypogammaglobulinemia, Infections, and Myelokathexis) syndrome, a rare, inherited, primary immunodeficiency disease caused by genetic mutations in the CXCR4 receptor gene. The company says the drug is currently being investigated in a global pivotal Phase 3 clinical trial called 4WHIM. Mavorixafor had previously been granted fast track, breakthrough therapy and orphan drug designations by the agency.
Mavorixafor is described as a potent, selective and bioavailable CXCR4 chemokine receptor allosteric antagonist. It was originally developed for HIV treatment, and is now being repurposed by X4 Pharmaceuticals for treating WHIM syndrome.