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Enhancement of photothermal toxicity and lung targeting delivery of Au nanorods via heparin-based nanogel

机译:通过肝素基纳米凝胶增强金纳米棒的光热毒性和肺靶向递送

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In this study, we report a synthesis of a surface modified heparin-based nanogel using D, L-alpha-lipoic acid. Heparin-PEI-LA nanogel could exist stably in aqueous solution with uniform size distribution. Transmission electron microscopy (TEM) observation showed that the developed heparin-PEI-LA nanogel could adsorb gold nanorods to form AuNRs-nanogel complexes with the aid of a reducing agent such as DTT. Then, the photothermal conversion efficiency and photothermal conversion for killing tumor cell in vitro of these nanogel complexes were detected. The improved cellular killing efficiency of AuNRs-nanogel might be due to an increased cellular uptake of gold nanorods in vitro. Moreover, Cy-7-labelled heparin-PEI-LA nanogel could be enriched in the lungs suggesting the potential use of the nanogel system for targeting the delivery of gold nanorods and a great potential application in the tumor photothermal therapy.
机译:在这项研究中,我们报告了使用D,L-α-硫辛酸合成表面改性的基于肝素的纳米凝胶。肝素-PEI-LA纳米凝胶可以稳定地存在于水溶液中,粒径分布均匀。透射电子显微镜(TEM)观察表明,开发的肝素-PEI-LA纳米凝胶可以借助还原剂(如DTT)吸附金纳米棒形成AuNRs-纳米凝胶复合物。然后,检测了这些纳米凝胶复合物的光热转化效率和体外杀死肿瘤细胞的光热转化。 AuNRs-纳米凝胶细胞杀伤效率的提高可能是由于金纳米棒在体外对细胞的吸收增加。此外,Cy-7标记的肝素-PEI-LA纳米凝胶可在肺中富集,表明该纳米凝胶系统可用于靶向金纳米棒的递送,并在肿瘤光热疗法中具有巨大的潜在应用。

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