文献:
Artesunate-Loaded and Near-Infrared Dye-Conjugated Albumin Nanoparticles as High-Efficiency Tumor-Targeted Photo-Chemo Theranostic Agent
文献链接:
https://link.springer.com/article/10.1186/s11671-018-2700-5作者:
Hainan Yang, Zaijia Liu, Xufeng Li, Zhenfeng Zhang, Deji Chen and Hui Lian
相关产品:
NH2-PEG2000-COOH(氨基-聚乙二醇2000-羧基)
NH2-PEG2000-FA(氨基-聚乙二醇2000-叶酸)
原文摘要:
Herein, a tumor-targeted multifunctional theranostic agent was synthetized using a facile method, combining four clinically approved materials: artesunate (Arte), human serum albumin (HSA), folic acid (FA), and indocyanine green (ICG). The obtained nanocomposites (FA-IHA NPs) showed an excellent photo- and physiological stability. The ICG in the FA-IHA NPs was used not only for near infrared (NIR) fluorescence imaging, but also for photothermal and photodynamic (PTT-PDT) therapy under a single NIR irradiation. In addition, the NIR irradiation (808 nm, 1 W/cm2) could trigger Arte release that showed enhanced chemotherapeutic effect. Through fluorescence imaging, the cell uptake and tumor accumulation of FA-IHA NPs were observed in vitro and in vivo, analyzed by confocal microscopy and NIR fluorescence imaging in tumor xenograft mice. Based on the diagnostic results, FA-IHA NPs at 24 h post injection and combined with NIR irradiation (808 nm, 1 W/cm2) could efficiently suppress tumor growth through a photo-chemo combination therapy, with no tumor recurrence in vitro and in vivo. The obtained results suggested that FA-IHA NPs are promising photo-chemo theranostic agents for future clinical translation.
NH2-PEG2000-COOH是一种多功能的有机化合物,主要由三个部分组成。一端是氨基,这是一个具有反应活性的官能团,能够参与多种化学反应。中间部分是聚乙二醇(PEG)链,其分子量约为 2000。PEG 是一种线性的聚合物,具有良好的水溶性、生物相容性和柔韧性。另一端是羧基,它同样是一个活性官能团,可以进行酯化、酰胺化等反应。
NH2-PEG2000-FA一种功能化的聚乙二醇(PEG)衍生物。它主要由三个部分组成:氨基、聚乙二醇(PEG)链(分子量约为 2000)和叶酸(FA)。氨基是一种活性官能团,可以参与多种化学反应。聚乙二醇(PEG)链在这个分子中起到连接和修饰的作用。PEG 是一种水溶性的聚合物,具有良好的生物相容性、低poison性和高亲水性。叶酸(FA)是一种维生素,它在细胞的代谢过程中起着重要的作用。在这个分子中,叶酸作为靶向基团。该文献基于此合成FA-IHA NPs:
图:作用机制
FA-IHA NPs的合成与表征:
将青蒿琥酯溶解在DMSO中,然后加入水中。在上述溶液中加入 HSA粉末,在室温下微搅拌。搅拌后,用戊二醛交联处理。为了去除多余的化学试剂,将混合物在蒸馏水中透析,得到负载弧的HSA纳米复合材料(Arte-HSA)。
为了激活HSA的羧基,将化学试剂EDC和NHS加入到Arte-HSA溶液中。然后,将混合物与NH2-PEG2000-FA在4°С下反应。然后,将ICG-NHS加入到混合物中,在室温下轻微搅拌。通过去离子水透析,得到FA和ICG共轭的纯化HSA纳米颗粒(FA-ICG-HSA@Arte,FA-IHA NPs)。用紫外-可见分光光度计检测Arte和ICG的加载量。
使用透射电子显微镜检测样品的形态。齐塔器来测量样品的大小和zeta电位。采用紫外-可见分光光度计测量吸收光谱的吸收光谱。采用单波长连续波激光器进行光热实验,并采用热电偶温度计检测温度。
图:电镜图像
结论:
该文献成功制备了基于NH2-PEG2000-COOH、NH2-PEG2000-FA合成的纳米复合材料FA-IHA NPs。该纳米复合材料(FA-IHA NPs)具有良好的光稳定性和生理稳定性。实验表明,这种纳米复合材料(FA-IHA NPs)可通过光Chemotherapy 联合控制tumour生长。