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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Comparative Evaluation of Antimutagenicity of Commonly Consumed Fruits and Activity-Guided Identification of Bioactive Principles from the Most Potent Fruit, Java Plum (Syzygium cumini)
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Comparative Evaluation of Antimutagenicity of Commonly Consumed Fruits and Activity-Guided Identification of Bioactive Principles from the Most Potent Fruit, Java Plum (Syzygium cumini)

机译:普通食用水果的抗诱变性比较评估和活性最强的水果爪哇李(Syzygium cumini)的生物活性成分的活性指导鉴定

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摘要

Commonly consumed fruits showed remarkable variation in antimutagenicity when assayed by E. coli rifampicin resistance assay, and Java plum (Syzygium cumini) was found to be one of the most potent fruits. Its anthocyanins contributed maximally to the observed antimutagenicity and resolved into three distinct bands in HPTLC. Although these bands displayed similar antioxidant capacity, the band at R_f 0.22 was the most antimutagenic and resolved into two peaks in HPLC. The second peak (t_R 3.8 min) displayed a strong and broad spectrum antimutagenicity and was identified as petunidin-3,5-diglucoside by analysis of its molecular ion and fragmentation pattern by ESI-MS/MS. The presence of glucose moiety was confirmed by TLC analysis of acid-hydrolyzed products. This purified anthocyanin was found to suppress mutagenic SOS DNA repair process in E. coli and thus indicated suppression of the error-prone DNA repair pathway as one of the major mechanisms of antimutagenicity of this fruit.
机译:当通过大肠杆菌利福平抗药性测定法测定时,常用的水果在抗诱变性方面表现出显着变化,并且发现爪哇李(Syzygium cumini)是最有效的水果之一。它的花色苷最大程度地促进了观察到的抗突变性,并分解为HPTLC中的三个不同的条带。尽管这些条带显示出相似的抗氧化能力,但R_f 0.22处的条带具有最大的抗诱变性,在HPLC中解析为两个峰。第二个峰(t_R 3.8分钟)显示出很强的广谱抗突变性,并通过ESI-MS / MS分析其分子离子和断裂模式,将其鉴定为petunidin-3,5-diglucoside。通过酸水解产物的TLC分析证实了葡萄糖部分的存在。发现这种纯化的花色苷可以抑制大肠杆菌中的诱变SOS DNA修复过程,因此表明抑制易错DNA修复途径是该果实抗诱变的主要机制之一。

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