Induction of Telomere Dysfunction Mediated by the Telomerase Substrate Precursor 6-Thio-2′-Deoxyguanosine

Telomerase is an almost universal oncology target, yet there are few telomerase-directed therapies in human clinical trials. In the present study, we demonstrate a small-molecule telomerase substrate approach that induces telomerase-mediated targeted "telomere uncapping," but only in telomerase-positive cancer cells, with minimal effects in normal telomerase-negative cells.