WINSTON-SALEM, N.C. – Based on their surprising discovery that an obesity drug can kill cancer cells, scientists at Wake Forest University School of Medicine have made a new finding about the drug’s effects and are working to design more potent cancer treatments.Published online today in Nature Structural and Molecular Biology, the study is the first to report how the drug orlistat (Xenical® or Alli®) binds and interacts with a protein found in tumor cells. The drug blocks the protein’s function and causes cell death.