Draft:Stephen H. Safe
Canadian-American toxicologist
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Stephen H. Safe is a Canadian-American toxicologist and molecular biologist. He is a Regents Professor and Distinguished Professor at Texas A&M University, where he holds the Sid Kyle Endowed Chair in Toxicology.[1]
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University of Oxford (DPhil)
Fellow of the AAAS (2022)
National Academy of Inventors Senior Member (2019)
Society of Toxicology Merit Award (2019)
Stephen H. Safe | |
|---|---|
| Alma mater | Queen's University (BSc, MSc) University of Oxford (DPhil) |
| Known for | Research on toxic equivalency (TEQ), aryl hydrocarbon receptor (AhR), nuclear receptor 4A (NR4A) |
| Awards | Regents Professor (Texas A&M) Fellow of the AAAS (2022) National Academy of Inventors Senior Member (2019) Society of Toxicology Merit Award (2019) |
| Scientific career | |
| Fields | Toxicology, Molecular Biology, Endocrinology |
| Institutions | Texas A&M University |
His research has focused on persistent organic pollutants, nuclear receptor biology, endocrine signaling, and the development of mechanism-based anticancer therapeutics.
Early life and education
Safe received his Bachelor of Science (1962) and Master of Science (1963) degrees in chemistry from Queen’s University, Canada. He earned his Doctor of Philosophy (D.Phil.) in bioorganic chemistry from the University of Oxford in 1965.
Academic career
Safe joined Texas A&M University in 1981 as Professor of Veterinary Physiology and Pharmacology.[1] He was appointed Distinguished Professor in 1985 and named Regents Professor in 2005.[1] He has held the Sid Kyle Endowed Chair in Toxicology since 1991.
In 2019, Safe was elected to the inaugural class of National Academy of Inventors Senior Members.[2]
In 2022, he was elected a Fellow of the American Association for the Advancement of Science (AAAS).[3]
He received the Society of Toxicology Merit Award in 2019.[4]
Research
Persistent organic pollutants and toxic equivalency
Safe conducted research on polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and dibenzofurans (PCDFs), including studies of their metabolism and photodegradation.
His work contributed to scientific understanding of structure–activity relationships among dioxin-like compounds and relative potency factors used in toxic equivalency (TEQ) assessments. The TEQ framework is used internationally to evaluate combined toxicity of dioxin-like compounds and has been incorporated into global environmental risk assessment practices.[5][6]
Aryl hydrocarbon receptor (AhR)
Safe’s research advanced understanding of the aryl hydrocarbon receptor (AhR) as a mediator of dioxin toxicity and a regulator of endocrine signaling. His laboratory examined mechanisms of AhR–estrogen receptor interactions and signaling pathways in cellular models.
Nuclear receptor 4A (NR4A)
Later research focused on orphan nuclear receptors NR4A1 and NR4A2. His laboratory identified small-molecule modulators of these receptors and investigated their roles in cancer-related signaling pathways.
Publications and impact
Safe has authored or co-authored approximately 880 peer-reviewed publications in toxicology and molecular biology.[1] His work has appeared in journals including Science, Nature, Cancer Research, and Journal of Biological Chemistry.
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