Cystic fibrosis is caused by changes in the genes of your DNA (Deoxyribonucleic Acid) encoding for the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) protein. These changes cause the CFTR to stop working as it should. CFTR is a protein present in some specific cells of the body and its correct functioning is important for those cells. GLPG2222 is being studied for treatment of cystic fibrosis. The study drug is designed to improve the amount and function of CFTR, which may improve some of the symptoms of cystic fibrosis.
The purpose of this study is to find out whether GLPG2222, taken by mouth as tablet once a day, is safe, well-tolerated and effective in improving your signs and symptoms of cystic fibrosis.
The study will also evaluate how the body takes in and breaks down the study drug (GLPG2222). The amount of drug in your blood will be measured at specific study visits after you start taking the drug. These measurements will show how quickly the drug is taken up by the body, how quickly it is broken down, when it reaches a steady level in the blood, and how long it stays in the body.