文章基本信息

标题：Increased Urinary Hydrogen Peroxide Levels Caused by Coffee Drinking
本地全文：下载
作者：Kazuyuki Hiramoto ; Tomoko Kida ; Kiyomi Kikugawa 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：2002
卷号：25
期号：11
页码：1467-1471
DOI：10.1248/bpb.25.1467
出版社：The Pharmaceutical Society of Japan
摘要：Experiments with volunteers in Singapore have demonstrated that coffee drinking increases urinary hydrogen peroxide levels (Long, Halliwell, Free Rad. Res ., 32, 463—467 (2000)). We re-examined the effect of coffee drinking of healthy Japanese subjects on urinary hydrogen peroxide levels. A cup of brewed or canned coffee commercially available in Japan generated 120—420 μmol hydrogen peroxide in incubation in a neutral medium at 37 °C for 6 h. The increased levels were higher than those obtained from a cup of green tea extract or a glass of red wine. After the subject drank a cup of coffee, apparent hydrogen peroxide levels (μmol/g creatinine) in urine collected 1—2 h after coffee drinking increased 3—10-fold compared to the levels before coffee drinking. The increased urinary hydrogen peroxide levels are likely derived mainly from 1,2,4-benzenetriol excreted in urine, because the major component that generates hydrogen peroxide is found to be 1,2,4-benzenetriol, and storing urine collected after coffee drinking increased hydrogen peroxide levels in a time-dependent fashion. Total hydrogen peroxide equivalent levels excreted in 3 h-urine after coffee drinking were estimated to be 0.5—10% that of coffee consumed. A residual amount of hydrogen peroxide may be retained or consumed in human bodies.
关键词：1,2,4-benzenetriol;hydrogen peroxide;coffee drinking;urine