Proteostasis sinks after Phase I data for CF triplet therapy

Proteostasis lost $2.76 (68%) to $1.31 on Monday after reporting Phase I data for its triplet cystic fibrosis therapy that lagged behind Phase III data of triple combination CF therapies from Vertex.

Proteostasis Therapeutics Inc. (NASDAQ:PTI) evaluated a triple combo comprising CF transmembrane conductance regulator (CFTR) corrector PTI-801, CFTR potentiator PTI-808 and CFTR amplifier PTI-428...