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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Design, synthesis and characterization of a novel fluorescent probe for nitric oxide based on difluoroboradiaza-s-indacene fluorophore
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Design, synthesis and characterization of a novel fluorescent probe for nitric oxide based on difluoroboradiaza-s-indacene fluorophore

机译:基于二氟硼烷-s-茚并四烯荧光团的新型一氧化氮荧光探针的设计,合成与表征

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摘要

Nitric oxide (NO) is a gaseous. free radical, which plays a role as an intracellular second messenger and a diffusible intercellular messenger. To obtain evidence for NO function in vivo, 1,3,5,7-tetramethyl-8-(4'-aminophenyl-N-(2"-amino)-phenzyl)-difluoroboradiaza-s-indacene (TMAPABODIPY) was designed and synthesized as a fluorescent probe for nitric oxide, which features high photostability and no pH dependency over a wide pH range. The fluorescence of TMAPABODIPY itself is very strong. When TMAPABODIPY traps NO in the presence of dioxygen, the weak fluorescent triazole form is obtained, which offers the advantages of specificity, and sensitivity for direct detection of NO. The relationship was obtained between the quenching fluorescence intensity and NO concentration in the range 0.02-4.0 mu mol l(-1). The detection limit is 5 nmol l(-1) (S/N = 3). The proposed method has been used to monitor the release of NO from S-nitrosocysteine, a NO-releasing agent. (c) 2004 Elsevier B.V. All rights reserved.
机译:一氧化氮(NO)为气态。自由基,它起着细胞内第二信使和扩散性细胞间信使的作用。为了获得体内NO功能的证据,设计了1,3,5,7-四甲基-8-(4'-氨基苯基-N-(2“-氨基)-苯甲酰基)-二氟硼氮杂-s-茚并四烯(TMAPABODIPY),合成用作一氧化氮的荧光探针,该探针具有较高的光稳定性,并且在很宽的pH范围内都不受pH依赖性。该方法具有特异性强,灵敏度高的特点,可直接检测NO,在0.02-4.0μmoll(-1)范围内,猝灭荧光强度与NO浓度呈正相关,检出限为5nmol l(- 1)(S / N = 3)。建议的方法已用于监控NO释放剂S-亚硝基半胱氨酸中NO的释放(c)2004 Elsevier BV保留所有权利。

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