Guillermina Lozano, PhD, is a Mexican-American geneticist. After earning her PhD in biochemistry from Rutgers University and completing postdoctoral work at Princeton, she joined The University of Texas MD Anderson Cancer Center, where she is now Chair of the Department of Genetics. Lozano is internationally recognized for her groundbreaking studies on the p53 tumor suppressor gene, which plays a key role in preventing cancer by regulating cell growth and DNA repair. Her work revealed how mutations in p53 contribute to cancer development and how related genes influence tumor behavior—insights that have guided new approaches in cancer biology and treatment. A member of the US National Academy of Sciences, Lozano has received numerous honors for her contributions to biomedical research and for mentoring the next generation of scientists. Her career exemplifies leadership, innovation, and a lifelong commitment to advancing cancer science.
