The U.S. Food and Drug Administration (FDA) has granted Fast Track Designation for Proteostasis Therapeutics’ triple combination program for the treatment of cystic fibrosis. 

The proprietary triple combination includes a novel cystic fibrosis transmembrane conductance regulator (CFTR) amplifier, third generation corrector and potentiator, known as PTI-428, PTI-801 and PTI-808, respectively. Proteostasis announced in January that the protocol for its triple combination clinical study, which they to initiate in the current quarter, has received endorsement and a high strategic fit score from the Therapeutics Development Network (TDN) and the Clinical Trial Network (CTN), the drug development arms of the Cystic Fibrosis Foundation (CFF) and the European CF Society (ECFS), respectively. 

“Fast Track designation represents another positive step for the development of our triple combination therapy and underscores the serious unmet need that remains for the vast majority of CF patients,” said Meenu Chhabra, president and chief executive officer of Proteostasis Therapeutics. “We believe this designation, together with other recent designations from regulators and CF organizations following review of our results with PTI-428, PTI-801 and PTI-808, is recognition of the potential of these programs in this disease.”