1. From the Department of Pharmacology (A.N., G.-X.Z, L.Y., M.R., H.H., S.K., Y.A.) and the Second Department of Internal Medicine (T.F., H.Kiyomoto, T.S., M.K.), Kagawa Medical University, Kagawa, Japan; and the Department of Physiology (H.Kobori), Tulane University Health Sciences Center, New Orleans, La.