10 January 2022 - 4D Molecular Therapeutics announced that the U.S. FDA has granted fast track designation for 4D-125 for treatment of patients with inherited retinal dystrophies due to defects in the RPGR gene, including X-linked retinitis pigmentosa.
4D-125 is a targeted and evolved R100-based product candidate, which was invented at 4DMT for efficient intravitreal delivery, and is designed to deliver a functional copy of the RPGR gene to photoreceptors in the retina.