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首页> 外文期刊>The FEBS journal >Selective detection of superoxide anion radicals generated from macrophages by using a novel fluorescent probe
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Selective detection of superoxide anion radicals generated from macrophages by using a novel fluorescent probe

机译:使用新型荧光探针选择性检测巨噬细胞产生的超氧阴离子自由基

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摘要

Quantitation of superoxide radical (O (2)(-).) production at the site of radical generation remains challenging. A simple method to detect nanomolar to micromolar levels of superoxide radical in aqueous solution has been developed and optimized. This method is based on the efficient trapping of O(2)(-). using a novel fluorescent probe (2-chloro-1,3-dibenzothiazolinecyclohexene), coupled with a spectra character-signaling increase event. A high-specificity and high-sensitivity fluorescent probe was synthesized in-house and used to image O(2)(-). in living cells. Better selectivity for O(2)(-). over competing cellular reactive oxygen species and some biological compounds illustrates the advantages of our method. Under optimal conditions, the linear calibration range for superoxide anion radicals was 5.03 x 10(-9)-3.33 x 10(-6) M. The detection limit was 1.68 x 10(-9) M. Fluorescence images of probe-stained macrophages stimulated with 4beta-phorbol 12-myristate 13-acetate were obtained successfully using a confocal laser scanning microscope.
机译:在自由基产生部位对超氧化物自由基(O(2)(-)。)的生产进行定量仍具有挑战性。已经开发并优化了一种检测水溶液中纳摩尔至微摩尔水平超氧化物自由基的简单方法。此方法基于O(2)(-)的有效陷阱。使用新型荧光探针(2-氯-1,3-二苯并噻唑啉环己烯),并结合光谱特征信号增加事件。内部合成了高特异性和高灵敏度的荧光探针,用于对O(2)(-)进行成像。在活细胞中。对O(2)(-)的选择性更好。优于竞争性细胞活性氧物质和一些生物化合物,这说明了我们方法的优势。在最佳条件下,超氧阴离子自由基的线性校准范围为5.03 x 10(-9)-3.33 x 10(-6)M.检测极限为1.68 x 10(-9)M.探针染色的巨噬细胞的荧光图像使用共聚焦激光扫描显微镜成功获得了由4β-佛波醇12-肉豆蔻酸酯13-乙酸酯刺激的蛋白。

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