College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao, 266071, China.
College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao, 266071, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China; School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China.
Biomaterials. 2023 Oct;301:122213. doi: 10.1016/j.biomaterials.2023.122213. Epub 2023 Jun 24.
In recent years, nano-drug delivery systems have made considerable progress in the direction of tumor treatment, but the low permeability of drugs has restricted the development of nano drugs. To solve this problem, we constructed a nano-drug delivery system with the dual effects of γ-glutamyltransferase (GGT) reaction and high nuclear targeting in tumor microenvironment to promote the deep penetration of drugs. Over-expression of GGT in tumor cells can specifically recognize γ-glutamyl substrate and release amino group from the hydrolysis reaction, which makes the whole system change from negative or neutral to positive charge system. The conjugated complex with positive charge rapidly endocytosis through electrostatic interaction, enhancing its permeability in tumor parenchyma. At the same time, the cell penetrating TAT contains a large amount of lysine, which can be identified by the nuclear pore complexes (NPCs) on the surface of the nuclear membrane, showing excellent nuclear localization function. The active DOX is released in the nucleus, which inhibits the mitosis of cancer cells and enhances the active transport ability of drugs in tumor cells. Therefore, this drug delivery system actively transports adriamycin into the tumor to achieve deep penetration of drugs through enzyme response and nuclear targeting, showing high anti-tumor activity and can be effectively applied to the treatment of liver cancer.
近年来,纳米药物递送系统在肿瘤治疗方向取得了相当大的进展,但药物的低通透性限制了纳米药物的发展。为了解决这个问题,我们构建了一种具有 γ-谷氨酰转移酶(GGT)反应和肿瘤微环境中高核靶向双重作用的纳米药物递送系统,以促进药物的深层渗透。肿瘤细胞中 GGT 的过表达可以特异性识别 γ-谷氨酰基底物,并从水解反应中释放氨基,使整个系统从负电荷或中性变为正电荷系统。带正电荷的共轭复合物通过静电相互作用迅速内吞,增强其在肿瘤实质中的通透性。同时,细胞穿透肽 TAT 含有大量赖氨酸,可被核膜表面的核孔复合物(NPCs)识别,表现出优异的核定位功能。活性 DOX 在核内释放,抑制癌细胞有丝分裂,增强药物在肿瘤细胞中的主动转运能力。因此,该药物递送系统通过酶反应和核靶向主动将阿霉素输送到肿瘤中,实现药物的深层渗透,表现出高抗肿瘤活性,并可有效应用于肝癌的治疗。
ACS Appl Mater Interfaces. 2020-8-26
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