Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi 214122, China.
ACS Appl Mater Interfaces. 2020 May 20;12(20):23311-23322. doi: 10.1021/acsami.0c02785. Epub 2020 May 8.
Dendritic macromolecules are potential candidates for nanomedical application. Herein, glycogen, the natural hyperbranched polysaccharide with favorable biocompatibility, is explored as an effective drug vehicle for treating liver cancer. In this system, glycogen is oxidized and conjugated with cancer drugs through a disulfide link, followed by loading of polypyrrole nanoparticles and then coated with functional phospholipids to form the desired system, Gly-ss-DOX@ppy@Lipid-RGD. The phospholipid layer has good cell affinity and can assist the system to penetrate into cells smoothly. Additionally, combined with the "fusion targeting" of glycogen and the active targeting effect of RGD toward liver cancer cells, Gly-ss-DOX@ppy@Lipid-RGD presents efficient specificity and enrichment of hepatocellular carcinoma. Owing to the glutathione-triggered cleavage of disulfide linkers, Gly-ss-DOX@ppy@Lipid-RGD can controllably release drugs to induce cell nucleus damage. Meanwhile, the polypyrrole nanoparticles can absorb near-infrared light and radiate heat energy within tumors. Besides enhancing drug release, the heat can also provide photothermal treatment for tumors. As proved by and experiments, Gly-ss-DOX@ppy@Lipid-RGD is a remarkable candidate for synergistic chemophotothermal therapy with high anticancer therapeutic activity and reduced systematic toxicity, efficiently suppressing tumor growth. All results demonstrate that glycogen nanoparticles are expected to be a new building block for accurate hepatocellular carcinoma treatment.
树突状大分子是纳米医学应用的潜在候选物。在此,研究了具有良好生物相容性的天然超支化多糖糖原,将其作为治疗肝癌的有效药物载体。在该体系中,通过二硫键将糖原氧化并与癌症药物连接,然后负载聚吡咯纳米颗粒,再用功能性磷脂进行包覆,形成所需的体系 Gly-ss-DOX@ppy@Lipid-RGD。磷脂层具有良好的细胞亲和力,可帮助该体系顺利进入细胞。此外,结合糖原的“融合靶向”作用和 RGD 对肝癌细胞的主动靶向作用,Gly-ss-DOX@ppy@Lipid-RGD 表现出高效的特异性和肝癌细胞的富集。由于谷胱甘肽触发二硫键的断裂,Gly-ss-DOX@ppy@Lipid-RGD 可以控制药物释放,诱导细胞核损伤。同时,聚吡咯纳米颗粒可以吸收近红外光并在肿瘤内辐射热能。除了增强药物释放外,热量还可以为肿瘤提供光热治疗。和 实验证明,Gly-ss-DOX@ppy@Lipid-RGD 是一种具有高效抗癌治疗活性和降低系统毒性的协同化学光热治疗的显著候选物,能够有效抑制肿瘤生长。所有结果表明,糖原纳米颗粒有望成为精准肝癌治疗的新基石。
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