Shin-ichiro Imai, MD, PhD, is Professor of Developmental Biology at Washington University School of Medicine in St. Louis. Shin-ichiro Imai received his MD and PhD degrees in 1989 and 1995, respectively, from Keio University School of Medicine in Tokyo, Japan, where he studied cellular aging-associated transcriptional regulation in human fibroblasts and proposed his “Heterochromatin Island Hypothe...