CAS Engineering Laboratory for Nanozyme, Key Laboratory of Protein and Peptide, Pharmaceutical Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, P. R. China.
University of Chinese Academy of Sciences, Beijing, 101408, P. R. China.
Theranostics. 2022 Jan 24;12(4):1800-1815. doi: 10.7150/thno.68459. eCollection 2022.
With the advantages of tumor-targeting, pH-responsive drug releasing, and biocompatibility, ferritin nanocage emerges as a promising drug carrier. However, its wide applications were significantly hindered by the low loading efficiency of hydrophobic drugs. Herein, we redesigned the inner surface of ferritin drug carrier (ins-FDC) by fusing the C- terminus of human H ferritin (HFn) subunit with optimized hydrophobic peptides. Hydrophobic and hydrophilic drugs were encapsulated into the ins-FDC through the urea-dependent disassembly/reassembly strategy and the natural drug entry channel of the protein nanocage. The morphology and drug loading/releasing abilities of the drug-loaded nanocarrier were then examined. Its tumor targeting character, system toxicity, application in synergistic therapy, and anti-tumor action were further investigated. After optimization, 39 hydrophobic Camptothecin and 150 hydrophilic Epirubicin were encapsulated onto one ins-FDC nanocage. The ins-FDC nanocage exhibited programed drug release pattern and increased the stability and biocompatibility of the loaded drugs. Furthermore, the ins-FDC possesses tumor targeting property due to the intrinsic CD71-binding ability of HFn. The loaded drugs may penetrate the brain blood barrier and accumulate in tumors more efficiently As a result, the drugs loaded on ins-FDC showed reduced side effects and significantly enhanced efficacy against glioma, metastatic liver cancer, and chemo-resistant breast tumors. The ins-FDC nanocarrier offers a promising novel means for the delivery of hydrophobic compounds in cancer treatments, especially for the combination therapies that use both hydrophobic and hydrophilic chemotherapeutics.
铁蛋白纳米笼具有肿瘤靶向、pH 响应性药物释放和生物相容性等优点,是一种很有前途的药物载体。然而,由于疏水性药物的载药效率低,其广泛应用受到了显著限制。在此,我们通过融合人 H 铁蛋白(HFn)亚基的 C 端与优化的疏水性肽,重新设计了铁蛋白药物载体(ins-FDC)的内表面。疏水性和亲水性药物通过尿素依赖性的解组装/再组装策略和蛋白纳米笼的天然药物进入通道被包封入 ins-FDC 中。然后检查了载药纳米载体的形态和载药/释药能力。进一步研究了其肿瘤靶向特性、系统毒性、在协同治疗中的应用以及抗肿瘤作用。经过优化,39 个疏水性喜树碱和 150 个亲水性表柔比星被包封到一个 ins-FDC 纳米笼中。该 ins-FDC 纳米笼表现出程序化的药物释放模式,并提高了载药的稳定性和生物相容性。此外,由于 HFn 的固有 CD71 结合能力,ins-FDC 具有肿瘤靶向特性。载药可以更有效地穿透血脑屏障并在肿瘤中积累。结果,载药 ins-FDC 显示出降低的副作用,并显著增强了对神经胶质瘤、转移性肝癌和化疗耐药乳腺癌的疗效。该 ins-FDC 纳米载体为癌症治疗中疏水性化合物的递药提供了一种很有前途的新方法,特别是对于使用疏水性和亲水性化疗药物的联合治疗。
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