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DNA biosensor based on self-assembled bilayer lipid membranes for the detection of hydrazines

机译:基于自组装双层脂质膜的DNA生物传感器用于肼的检测

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This article reports a new DNA biosensor strategy for detection of chemicals. This strategy is based on electrochemical monitoring of changes of ion current through a lipid membrane with immobilized DNA probes caused by interaction of these modified BLMs with hydrazine compounds. A self-assembled metal supported bilayer lipid membrane (s-BLM) composed of egg phosphatidyl choline was prepared on a silver metal electrode. The oligomers used were single stranded deoxyribonucleic acids: thymidylic acid icosanucleotide terminated with a C-16 alkyl chain to assist incorporation into s-BLMs (dT(20)-C-16), and deoxyadenylic acid icosanucleotide (dA(20)). These s-BLMs with incorporated DNA interact with hydrazines, and the s-BLMs display an analytically useful tool for ppb detection levels of hydrazine compounds (i.e., hydrazine, methylhydrazine, dimethylhydrazine and phenylhydrazine). This BLM/DNA biosensor offers a highly sensitive, rapid, and portable device for monitoring these environmentally and toxicologically significant compounds. [References: 32]
机译:本文报告了一种用于检测化学物质的新的DNA生物传感器策略。该策略基于电化学监测通过固定化DNA探针通过脂质膜的离子电流变化,这些离子是由这些修饰的BLM与肼化合物的相互作用引起的。在银金属电极上制备了由卵磷脂酰胆碱组成的自组装金属支撑的双层脂质膜(s-BLM)。所用的低聚物是单链脱氧核糖核酸:以C-16烷基链终止的胸苷酸二十碳核苷酸,协助掺入s-BLM(dT(20)-C-16),以及脱氧腺苷酸二十核苷酸(dA(20))。这些结合了DNA的s-BLM与肼相互作用,并且s-BLM显示出对ppb检测肼化合物(即肼,甲基肼,二甲基肼和苯肼)水平的分析有用的工具。这种BLM / DNA生物传感器提供了一种高度灵敏,快速且便携式的设备,用于监测这些对环境和毒理学有重大影响的化合物。 [参考:32]

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