He earned a PhD in toxicology from Texas A&M University. Dr. Zacharewski’s research interests include toxicogenomics and endocrine disruptors. His current research regarding toxicogenomics includes using gene-expression array technology to investigate the effects of gestational and lactational exposure to estrogenic substances on male reproductive development and fertility in mice, to examine the effects of estrogenic chemicals on in vitro human neuronal stem-cell differentiation and cell-cell communication, and to establish signature gene-expression profiles for various classes of chemicals and complex mixtures with in vitro and in vivo models. Dr. Zacharewski serves on the National Research Council Subcommittee on Process to Identify Hazards and Assess the Unintended Effects of Genetically Engineered Foods on Human Health.