... SurveillanceCenter, National Institute of InfectiousDiseases, 4-7-1 Gakuen, Musashimurayama,Tokyo 208-0011, JapanFax: +81 42 565 3315Tel: +81 42 561 0771E-mail: kimhiro@nih.go.jp(Received ... 100 lM each organic selenium compound. Cell viability wasmeasured at intervals of 24 h. (B) Cell viability of HEL cells. (C) Cell viability of HEp-2 cells. (D) Cell viability of PMNs. PMNs ... inhi-bition of NADPH oxidase in PMNs.We assessed the metabolism of O2–by selenoureasand selenoamides as an index of H2O2 production. Both selenourea A and selenourea B produced smallamounts of...