Surface plasmon enhanced energy transfer between gold nanorods and fluorophores: application to endocytosis study and RNA detection.

Surface plasmon enhanced energy transfer between gold nanorods and fluorophores: application to endocytosis study and RNA detection.
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表面等离子体增强金纳米棒和荧光团之间的能量转移:在内吞作用研究和 RNA 检测中的应用。

DOI:
10.1039/c4fd00199k
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发表时间:
2015
影响因子:
3.4
通讯作者:
Yu Chen
Yu Chen
中科院分区:
化学2区
文献类型:
--
作者:
Yinan Zhang;Guoke Wei;Jun Yu;D. Birch;Yu Chen

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在此之前,我们已经利用荧光寿命成像显微镜(FLIM)证明了在溶液和细胞内相下,在双光子激发下,表面等离子体增强了荧光团和金纳米棒之间的能量转移。这些研究表明,金纳米颗粒-染料能量转移组合不仅在Förster共振能量转移(FRET)成像中具有吸引力,而且在基于能量转移的生物分析物荧光寿命传感中也具有吸引力。在这里,我们应用这种方法来研究金纳米棒(gnr)在HeLa细胞中的内在化,使用早期内核体标记标记物GFP。观察到的GFP和GNR之间的能量转移表明内吞作用参与了GNR的摄取。此外,研究人员还展示了一种基于寡核苷酸功能化金纳米棒的新型纳米探针,该纳米探针可通过染料- gnrs能量转移进行核酸传感,这可能为癌症诊断和预后开辟新的可能性。首次利用时间分辨荧光光谱技术研究了寡核苷酸设计对纳米探针性能的影响,为纳米探针的优化设计提供了新的思路。
Previously we have demonstrated surface plasmon enhanced energy transfer between fluorophores and gold nanorods under two-photon excitation using fluorescence lifetime imaging microscopy (FLIM) in both solution and intracellular phases. These studies demonstrated that gold nanoparticle-dye energy transfer combinations are appealing, not only in Förster resonance energy transfer (FRET) imaging, but also energy transfer-based fluorescence lifetime sensing of bio-analytes. Here, we apply this approach to study the internalization of gold nanorods (GNRs) in HeLa cells using the early endosome labeling marker GFP. The observed energy transfer between GFP and the GNRs indicates the involvement of endocytosis in GNR uptake. Moreover, a novel nanoprobe based on oligonucleotide functionalized gold nanorods for nucleic acid sensing via dye-GNRs energy transfer is demonstrated, potentially opening up new possibilities in cancer diagnosis and prognosis. The influence of oligonucleotide design on such nanoprobe performance was studied for the first time using time-resolved fluorescence spectroscopy, bringing new insights to the optimization of the nanoprobe.
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