WINSTON-SALEM, N.C. – A hormone that is important in the control of blood pressure also shrinks lung cancer tumors in mice, suggesting a new way to prevent or treat the deadly cancer, according to scientists at Wake Forest University School of Medicine.Reporting in the journal Cancer Research, the scientists said that in mice treated with the hormone, angiotensin-(1-7), tumor volume decreased by 30 percent. In mice that did not receive the treatment, the tumor size more than doubled.