The purpose of this study is to evaluate the safety and effectiveness of an investigational drug called BMS-936558 in patients with stage IIIB or IV squamous cell lung cancer that has continued to grow despite at least two prior regimens of chemotherapy.
BMS-936558 boosts the body’s immune system by targeting a protein on white blood cells called PD-1. PD-1 normally maintains the balance of the immune system by shutting it down at the right time. Some cancers take advantage of this shut-down mechanism by activating PD-1, enabling them to escape attack by the body’s white blood cells. BMS-936558 binds to and inactivates PD-1, enhancing the body’s ability to detect and destroy cancer cells.