首页> 美国卫生研究院文献>Molecular Imaging >Fluorescent Plasmonic and Radiotherapeutic Properties of the 177Lu–Dendrimer-AuNP–Folate–Bombesin Nanoprobe Located Inside Cancer Cells
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Fluorescent Plasmonic and Radiotherapeutic Properties of the 177Lu–Dendrimer-AuNP–Folate–Bombesin Nanoprobe Located Inside Cancer Cells

机译:位于癌细胞内的177Lu–Dendrimer-AuNP–叶酸–炸弹蛋白纳米探针的荧光等离子和放射治疗特性

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摘要

The integration of fluorescence and plasmonic properties into one molecule is of importance in developing multifunctional imaging and therapy nanoprobes. The aim of this research was to evaluate the fluorescent properties and the plasmonic–photothermal, therapeutic, and radiotherapeutic potential of 177Lu–dendrimer conjugated to folate and bombesin with gold nanoparticles in the dendritic cavity (177Lu–DenAuNP–folate–bombesin) when it is internalized in T47D breast cancer cells. The intense near-Infrared (NIR) fluorescence emitted at 825 nm from the conjugate inside cells corroborated the usefulness of DenAuNP–folate–bombesin for optical imaging. After laser irradiation, the presence of the nanosystem in cells caused a significant increase in the temperature of the medium (46.8°C, compared to 39.1°C without DenAuNP–folate–bombesin, P < 0.05), resulting in a significant decrease in cell viability (down to 16.51% ± 1.52%) due to the 177Lu–DenAuNP–folate–bombesin plasmonic properties. After treatment with 177Lu–DenAuNP–folate–bombesin, the T47D cell viability decreased 90% because of the radiation-absorbed dose (63.16 ± 4.20 Gy) delivered inside the cells. The 177Lu–DenAuNP–folate–bombesin nanoprobe internalized in cancer cells exhibited properties suitable for optical imaging, plasmonic–photothermal therapy, and targeted radiotherapy.
机译:将荧光和等离子体特性整合到一个分子中对于开发多功能成像和治疗纳米探针非常重要。这项研究的目的是评估在树突腔中与金纳米颗粒共轭的叶酸和蛙皮素的 177 Lu-树状大分子的荧光性质以及等离子-光热,治疗和放射治疗的潜力( 177 Lu–DenAuNP–叶酸–薄壁孢菌素)被T47D乳腺癌细胞内化时。细胞内结合物在825 nm处发出的强烈的近红外(NIR)荧光证实了DenAuNP-叶酸-薄壁蛋白在光学成像中的有用性。激光照射后,细胞中纳米系统的存在导致培养基温度显着升高(46.8°C,相比之下,没有DenAuNP-叶酸-轰炸蛋白的培养基为39.1°C,P <0.05),导致细胞显着降低 177 Lu–DenAuNP–叶酸–薄壁蛋白原的等离激元特性使细胞活力(降低至16.51%±1.52%)。用 177 Lu-DenAuNP-叶酸-薄壁孢菌素处理后,T47D细胞活力由于细胞内释放的辐射吸收剂量(63.16±4.20 Gy)而降低了90%。内化在癌细胞中的 177 Lu–DenAuNP–叶酸–炸弹蛋白纳米探针显示出适用于光学成像,等离子-光热疗法和靶向放射疗法的特性。

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