Krystal Biotech’s lead candidate has received FDA fast track designation for the treatment of dystrophic epidermolysis bullosa (DEB). The firm is building a GMP facility in Pennsylvania to support future scale-up. The US Food and Drug Administration (FDA) granted fast track designation to KB103, a topically-applied gene therapy engineered to deliver a human collagen protein to patients suffering from DEB. The designation will help expedite the development and review process of the allogeneic gene therapy, and is a boost for…