vx-661 98.5%

VX-661 is a second F508del CFTR corrector and help CFTR protein reach the cell surface.
Tezacaftor is a drug of the cystic fibrosis transmembrane conductance regulator (CFTR) potentiator class. It was developed by Vertex Pharmaceuticals and FDA approved in combination with [ivacaftor] to manage cystic fibrosis. This drug was approved by the FDA on February 12, 2018. Cystic Fibrosis is an autosomal recessive disorder caused by one of several different mutations in the gene for the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) protein, an ion channel involved in the transport of chloride and sodium ions across cell membranes. CFTR is active in epithelial cells of organs such as of the lungs, pancreas, liver, digestive system, and reproductive tract. Alterations in the CFTR gene result in altered production, misfolding, or function of the protein and consequently abnormal fluid and ion transport across cell membranes. As a result, CF patients produce thick, sticky mucus that clogs the ducts of organs where it is produced making patients more susceptible to complications such as infections, lung damage, pancreatic insufficiency, and malnutrition.