Effects of Ring Size and Polar Functional Groups on the Glutathione Peroxidase-Like Antioxidant Activity of Water-Soluble Cyclic Selenides
作者:Kenta Arai、Fumio Kumakura、Motoi Takahira、Natsumi Sekiyama、Nozomi Kuroda、Toshiki Suzuki、Michio Iwaoka
DOI:10.1021/acs.joc.5b00544
日期:2015.6.5
the effects of ring structure and a substituent on the glutathione peroxidase- (GPx-) like antioxidant activities of aliphatic selenides, series of water-soluble cyclic selenides with variable ring size and polar functional groups were synthesized, and their antioxidant activities were evaluated by NADPH-coupled assay using H2O2 and glutathione (GSH) in water and also by NMR spectroscopy using H2O2
为了阐明环结构和取代基对谷胱甘肽过氧化物酶-(GPx-)的影响,如脂肪族硒化物的抗氧化活性,合成了一系列具有可变环尺寸和极性官能团的水溶性环状硒化物,并评估了其抗氧化活性通过使用H 2 O 2和水中的谷胱甘肽(GSH)进行NADPH偶联测定,以及使用H 2 O 2和二硫苏糖醇(DTT红)进行NMR光谱分析)在甲醇中。在水中类似于GPx的活性,硒化物氧化的二级速率常数以及在水中计算出的HOMO能级之间发现了很强的相关性。结果支持了氧化过程是催化循环的速率决定步骤的结论。另一方面,对于在甲醇中观察到的活性没有获得这样的相关性。确定最佳环尺寸为五。取代基的类型(NH 2