Vasthera Co. Ltd. has received IND clearance from the U.S. FDA, enabling it to initiate a phase I trial for VTB-10 for pulmonary arterial hypertension (PAH). Vasthera identified a deficiency of the enzyme peroxiredoxin (PRX) in PAH lesions and used its Redoxizyme platform to develop VTB-10, a small-molecule enzyme that precisely replicates PRX function.