Beam Therapeutics IncFDA clearance of IND for BEAM-304 enables Phase 1/2 trial initiation

Beam Therapeutics announced that the U.S. Food and Drug Administration has cleared its investigational new drug application for BEAM-304, a base-editing therapy for phenylketonuria. The company plans to initiate a Phase 1/2 trial evaluating multiple mutation-specific base editors within a single clinical program, leveraging recent FDA guidance to accelerate genome-editing therapies. BEAM-304 uses lipid nanoparticle delivery to correct mutations in the PAH gene, aiming to restore enzyme activity and reduce toxic phenylalanine levels while enabling diet normalization. Preclinical data showed normalized plasma phenylalanine in mouse models, and updated results will be presented at the FASEB Genome Engineering conference in July 2026. PKU affects approximately 20,000 people in the U.S. and currently has no approved curative treatments.
Beam Therapeutics IncFDA clearance of IND for BEAM-304 enables Phase 1/2 trial initiation