ProQR Therapeutics recently received orphan drug designation for their Cystic Fibrosis therapy that targets the F508del mutation. This approach is different to the CFTR modulation approach (potentiators and correctors), which targets the defective protein. ProQR are targeting the Cystic Fibrosis defect at the RNA level.
I have explained this further here:
http://sixtyfiverosesblog.wordpress...eives-orphan-drug-status-for-f508del-therapy/
I have explained this further here:
http://sixtyfiverosesblog.wordpress...eives-orphan-drug-status-for-f508del-therapy/