The uncoupling proteins (UCPs) are mitochondrial carriers that modulate the energetic efficiency and, as a result, can lower superoxide levels. Here, we describe the discovery of a small-molecule inhibitor of the UCPs. Screening of potential UCP1 regulators led to the identification of chromane derivatives that inhibit its proton conductance. Members of the UCP family can act as a defense against oxidative stress and, thus, UCP2 plays a ...
