作者:Tomoko SHIMAMURA、Atsuko TAKAMORI、Hiroyuki UKEDA、Masayoshi SAWAMURA
DOI:10.1271/bbb.67.295
日期:2003.1
responsible for the reduction was analyzed. Among the incubated products, fructosazine and deoxyfructosazine were identified by LC-MS, FAB-MS, and 1H- and 13C-NMR. These products showed no XTT reducibility, but an unstable intermediate with a molecular weight of 322 displayed reducibility. Since the intermediate gave fructosazine by oxidation with XTT and was a precursor of deoxyfructosazine, we conclude
通过孵育葡萄糖胺盐酸盐还原XTT(3'-[1-[(苯基氨基)-羰基] -3,4-四唑]-双(甲氧基-6-硝基)苯磺酸水合物)。孵育的葡糖胺的XTT还原性与DNA断裂活性线性相关。为了阐明反应机理,在温育过程中形成的葡糖胺衍生物通过HPLC分离,并分析了引起还原的化合物。在孵育产物中,通过LC-MS,FAB-MS以及1H-和13C-NMR鉴定了果糖嗪和脱氧果糖嗪。这些产物没有XTT还原性,但是分子量为322的不稳定中间体显示出还原性。由于该中间体通过XTT氧化生成果糖嗪,并且是脱氧果糖嗪的前体,我们得出结论,该中间体可能是二氢果糖嗪。因此,通过培养的葡糖胺的XTT还原性基于由两个分子的葡糖胺的缩合形成的二氢果糖嗪。