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Easily prepared ruthenium-complex nanomicelle probes for two-photon quantitative imaging of oxygen in aqueous media

机译:易于制备的钌 - 络合物纳米尺寸探针,用于水性介质中的氧气的两光子定量成像

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摘要

We present a simple and inexpensive technique to enable 3D, high-resolution, and quantitative imaging of dissolved oxygen in aqueous media using a commercially available hydrophobic dye, [Ru(dpp)(3)](2+). The dye is encapsulated in nanomicelles formed by a poloxamer (a biocompatible surfactant), allowing for uniform dispersion in aqueous media without long, complex, and expensive chemical synthesis procedures. The nanomicelle probes are tested and found to remain stable for several months in water and for several hours in biological media. The probes are sufficiently large in size for vasculature retention and enable intravenous oxygen imaging in vivo. The two-photon cross-section of the [Ru(dpp)(3)](2+) nanomicelle probes surpass that of the well-established and widely used oxygen-sensitive probes in multiphoton microscopy. We also characterize the oxygen-sensitivity of the probes as a proof of their viability as low cost and easily prepared markers for multiphoton quantitative oxygen imaging in vivo and for other applications in aqueous media.
机译:我们介绍了一种简单且廉价的技术,可使用市售的疏水染料来实现溶解氧的3D,高分辨率和定量成像,[Ru(DPP)(3)](2+)。将染料包封在由泊洛沙姆(生物相容性表面活性剂)形成的纳米核细胞中,允许在没有长,复杂和昂贵的化学合成程序的含水介质中均匀分散。测试纳米摩尔探针,发现在水中保持稳定,在生物介质中持续数小时。探针的尺寸足够大,用于脉管系统保留,并使体内静脉注射氧气成像。 [Ru(DPP)(3)](2+)纳米尺寸探针的双光子横截面超出了多选显微镜中良好的良好和广泛使用的氧敏感探针的探测器。我们还表征了探针的氧敏感性,作为其可行性的证据,以及用于在体内的多选量定量氧成像的低成本和容易制备的标记,以及用于水性介质中的其他应用。

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