Researchers have developed a small-molecule inhibitor of a protein that plays key roles in the control of cell division, and they show that the inhibitor can halt the growth of tumors in mice and cancer-derived cells growing in culture. The findings are reported in companion papers reported by two collaborating groups—one (Lenart et al.) led by Jan-Michael Peters of the Research Institute of Molecular Pathology in Vienna, and the other (Steegmaier et al.) led by Norbert Kraut of Boehringer Ingelheim Austria GmbH. The papers will appear in Current Biology online on February 8th.

