Alan David Friedman, MD

Dr. Doris Da May Lin is an Associate Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science. She specializes in neuroradiology.Dr. Lin received her B.A. in chemistry from the University of Pennsylvania, and then pursued a joint M.D./Ph.D. degree at the Yale University School of Medicine, with graduate training in the neurosciences. She completed a medical internship at the University of Pennsylvania Hospital and a diagnostic radiology residency at New York Presbyterian Hospital-Cornell. After a two-year neuroradiology fellowship, she joined the faculty at Johns Hopkins.

Dr. Zambidis is Associate Professor of Oncology and Pediatrics at the Johns Hopkins University School of Medicine, and a member of the Johns Hopkins Kimmel Cancer Center. Dr. Zambidis’ clinical expertise is in the treatment of disorders of the immune system, histiocytic disorders, hematologic malignancies, blood and bone marrow transplantation (BMT), and regenerative medicine. His research interest focuses on advancing our understanding of pluripotent stem cells– the ‘master’ stem cells that can generate any new cell or tissue that the body needs to repair itself. Dr. Zambidis earned his M.D./Ph.D. in the Medical Scientist Training Program at the University of Rochester, Rochester, N.Y. He completed his Pediatrics Residency in the Department of Pediatrics, Washington University, St. Louis, Missouri, and his clinical/research fellowships in Pediatric Hematology/Oncology at the Johns Hopkins Hospital and the National Cancer Institute at the NIH. Dr. Zambidis has been interested in the biology of stem cells since he came to Johns Hopkins, in 2001. As a Pediatric Hematology/Oncology fellow, he was one of the very first Hopkins investigators to work with human embryonic stem cells (hESCs), beginning shortly after they were made available to the biomedical research community, in 2002. Dr. Zambidis was awarded the first NIH K08 Clinician-Scientist Training Award specifically investigating the therapeutic potential of human pluripotent stem cells (2004). After joining the Hopkins faculty, in 2005, he developed an experimental model of the early formation process of human blood and blood vessels using human pluripotent stem cells.The Zambidis laboratory at the Johns Hopkins Institute for Cell Engineering focuses on understanding the developmental biology of human hemato-vascular and human pluripotent stem cells. More recently, his group completed studies on highly efficient methods for generating nonintegrated, human induced pluripotent stem cell (hiPSC) lines from myeloid progenitors. His group has developed novel hiPSC-based vascular therapies for retinopathies, and more recently derived a new class of human pluripotent stem cells in a naïve ground state with new functionalities with even greater potency and stronger regenerative capacities. As a BMT physician-scientist, his long-term goal is to use hESC, hiPSC, and related pluripotent stem cell technologies to not only treat severe degenerative diseases, but also to elucidate the biological nature of cancer and aging.

Karen M. Horton, M.D., is a Professor of Radiology and the Chair of Radiology for the Russell H. Morgan Department of Radiology and Radiological Science. Dr. Horton’s clinical and research focus is on abdominal CT imaging, 3D imaging of the gastrointestinal tract and the mesenteric vessels, and virtual colonoscopy. She has published over 170 scientific papers, numerous book chapters and was the Johns Hopkins principle investigator in the National CT Colonography Trial. Dr. Horton graduated summa cum laude from the University of Notre Dame in 1988. She attended the Johns Hopkins University School of Medicine, graduating in the top 10 percent of her class and was inducted into the AOA honor society. After completing a radiology residency and a fellowship in cross-sectional imaging at Johns Hopkins, Dr. Horton joined the radiology faculty as an assistant professor in 1998. Dr. Horton was promoted to Associate Professor in 2002, and in 2008 became the 144th female to be promoted to Professor at Johns Hopkins. In 2009, Dr. Horton assumed the role of Johns Hopkins Radiology Residency Program Director. During her more than four years as program director, the residency program was ranked #1 by Aunt Minnie twice and #4 by Doximity. During her tenure, in addition to making significant improvements to the residency curriculum, she increased diversity by recruiting more women and underrepresented minorities. From 2013 to 2014, Dr. Horton served as Acting Chair of the Department of Radiology at the Johns Hopkins Bayview Medical Center. Dr. Horton established subspecialty divisions and more fully integrated the Johns Hopkins Bayview Medical Center and The Johns Hopkins Hospital radiology divisions. She is a member of the Johns Hopkins Kimmel Cancer Center. Dr. Horton has held numerous leadership positions within the Department of Radiology and Radiological Science, including Vice Chair of Operations in 2014, Executive Vice Chair in 2015, Interim Chair in 2016-2017.