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High Singlet Oxygen Yield Photosensitizer Based Polypeptide Nanoparticles for Low-Power Near-Infrared Light Imaging-Guided Photodynamic Therapy
Bioconjugate Chemistry ( IF 4.0 ) Pub Date : 2018-09-06 00:00:00 , DOI: 10.1021/acs.bioconjchem.8b00576
Zheng Ruan 1 , Wei Miao 2 , Pan Yuan 1 , Liu Le 1 , Lijuan Jiao 2 , Erhong Hao 2 , Lifeng Yan 1
Affiliation  

NIR photosensitizer is attractive for photodynamic therapy (PDT). Low-power light irradiation and imaging-guided PDT makes it possible to increase tissue penetration depth. The pyrrole-substituted iodinated BODIPY (BDPI) molecule was designed and synthesized, and it possesses an intense NIR absorption and emission band, and exhibits a high singlet oxygen quantum yield (ΦΔ = 0.80) which leads remarkable cytotoxicity upon low power illumination (IC50 = 0.60 μg/mL, 6.1 mW/cm2). After being encapsulated with biocompatibility polypeptide PEG–PLys, polymeric micelles nanoparticles (PBDPI NPs) was obtained that are water-dispersed and passively tumor-targetable. Such enhanced accumulation in tumor area makes it easily traced in vivo due to its NIR fluorescence. In addition, such nanoparticles offer an unprecedented photodynamic therapeutic effect by using a low-power irradiation light, which makes it possible to kill cancer cells in deep tissue efficiently.

中文翻译:

高单线态氧产量光敏剂的多肽纳米粒子的低功率近红外成像引导光动力疗法。

NIR光敏剂对光动力疗法(PDT)具有吸引力。低功率光照射和成像引导的PDT使增加组织穿透深度成为可能。吡咯取代的碘化BODIPY(BDPI)分子的设计和合成,并且它具有强烈的NIR吸收和发射带,并且表现出高的单线态氧量子产率(Φ Δ = 0.80),其在低功率照明导致显着的细胞毒性(IC50 =0.60μg/ mL,6.1mW / cm 2)。用生物相容性多肽PEG-PLys封装后,获得了聚合物胶束纳米颗粒(PBDPI NPs),它们可以水分散并且可以被动地靶向肿瘤。肿瘤区域中这种增强的积累使其易于在体内追踪由于其近红外荧光。另外,这样的纳米颗粒通过使用低功率照射光提供了空前的光动力治疗效果,这使得可以有效地杀死深部组织中的癌细胞。
更新日期:2018-09-06
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