Samuel McDonald McCann, who earned his M.D. from the University of Pennsylvania School of Medicine in Philadelphia in 1948, has made seminal contributions to the understanding of neuroendocrine regulation of growth, reproduction, thyroid function, and responses to stressful stimuli. Most recently, McCann's research has centered on neuroendocrine immunology and interactions between the immune system and the central nervous system.
McCann, who is a professor of biomedical science at the University of Texas, Southwestern Medical Center at Dallas, is a member of the National Academy of Sciences and a past president of the International Society of Neuroendocrinology.