Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
ISSN-L : 0918-6158
Release of Nitric Oxide from a Spin Trap, N-tert-butyl-α-phenylnitrone, under Various Oxidative Conditions
Kieko SAITOHisashi YOSHIOKAShunsuke KAZAMARichard G. CUTLER
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1998 Volume 21 Issue 4 Pages 401-404

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Abstract

Nitric oxide (NO) generation from a spin trap, N-tert-butyl-α-phenylnitrone (PBN) under various oxidative conditions was examined. The absorbance of PBN at 295 nm decreased with time of UV-irradiation, showing that PBN was decomposed by UV irradiation. The hydroxyl radical formed from a Fenton reagent also decomposed PBN, but there was little effect by a peroxyl radical and a superoxide. Nitrite, an oxidative product of NO, in PBN solution was determined using a NOx analyzer based on Griess reaction. UV-irradiation and the hydroxyl radical also formed nitrite. Direct detection of NO from the sample on reaction with hydroxyl radical was successful using a GC/MS/SIM on the UV-irradiated sample. NO generated in PBN solutions activated guanylate cyclase. From these results, PBN is viewed as a new kind of medicine which acts as an actioxidant and as an No donor in vivo.

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© The Pharmaceutical Society of Japan
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