William S. Powell, Ph.D.
Professor Emeritus, Department of Medicine
Tel: 514-398-3864 ext. 094071
BA (honors biochemistry), University of Saskatchewan, 1967
PhD (Chemistry), Dalhousie University, 1972
Postdoc (Physiol Chem), Karolinska Institute, 1972-75
McGill University (Department of Medicine), 1976-
McGill courses: EXMD609 (Cellular Methods); EXMD610 (Molecular Methods)
Methods Biomed Res EXMD 610
Eicosanoids, leukotrienes, prostaglandins, inflammation, asthma, receptors, biosynthesis and metabolism, eosinophils, neutrophils, chromatography
Research or Clinical Activities
We are interested in the roles of eicosanoids in inflammation, especially related to asthma. We discovered the 5-lipoxygenase product, 5-oxo-ETE that can by synthesized by both inflammatory and structural cells and is the strongest known chemoattractant for human eosinophils among lipid mediators. We are studying the regulation of its biosynthesis and its biological activities and are collaborating with a chemist (Joshua Rokach at the Florida Institute of Technology) to develop 5-oxo-ETE receptor antagonists that could potentially be used for the treatment of asthma and other eosinophilic disorders. We are screening various synthetic compounds and have identified several with nanomolar potencies. We are currently investigating the pharmacokinetics and efficacy of some of these compounds in primate models. Another project we are involved in is the regulation of NADPH oxidase in inflammatory cells. In this case we are investigating the regulation of pyridine nucleotide levels (principally NADPH) in neutrophils.