Ministry of Educational (MOE) Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Theranostics. 2022 May 13;12(8):3977-3994. doi: 10.7150/thno.70852. eCollection 2022.
As a classical autophagy inhibitor, CQ has been supposed to increase the sensitivity of tumors to chemotherapeutics. However, there exists a quite huge gap between laboratory research and clinical application, which is related to the distinct pharmacokinetic behavior of CQ to a great extent. Based on amphiphilic copolymer PPAP, a pH-responsive drug-induced self-assembled nanovesicle, named DC-DIV/C, was constructed to load DOX⋅HCl and CQ. The physicochemical properties of DC-DIV/C were characterized. To validate the cooperative action and delivery synchronism of DOX⋅HCl and CQ, cytotoxicity, apoptosis, cellular uptake and autophagy assay were investigated in DOX⋅HCl resistant cancer cells. The pharmacokinetic character and antitumor effect of DC-DIV/C were evaluated on rats and nude mice bearing xenograft drug-resistant K562/ADR tumors, respectively. DC-DIV/C could simultaneously encapsulate DOX·HCl and CQ at the optimal ratio of 1:2. In vitro and in vivo tests confirmed that DC-DIV/C acted as an excellent vehicle for the synchronous delivery of DOX⋅HCl and CQ during the process of blood circulation, cellular uptake and intracellular release. Furthermore, CQ accomplished autophagy inhibition to reduce the IC of DOX⋅HCl resistant cancer cells. Consequently, DC-DIV/C exhibited the extremely improved anti-tumor effect with 84.52% TIR on K562/ADR tumor. This study provides a promising and powerful strategy to achieve enhanced treatment outcomes for the precise combination therapy.
作为一种经典的自噬抑制剂,CQ 被认为可以提高肿瘤对化疗药物的敏感性。然而,实验室研究与临床应用之间存在着相当大的差距,这在很大程度上与 CQ 截然不同的药代动力学行为有关。基于两亲性嵌段共聚物 PPAP,构建了一种 pH 响应的药物诱导自组装纳米囊泡,命名为 DC-DIV/C,用于装载 DOX·HCl 和 CQ。对 DC-DIV/C 的理化性质进行了表征。为了验证 DOX·HCl 和 CQ 的协同作用和递药同步性,在 DOX·HCl 耐药癌细胞中进行了细胞毒性、凋亡、细胞摄取和自噬实验。分别在荷瘤耐药 K562/ADR 肿瘤大鼠和裸鼠中评价了 DC-DIV/C 的药代动力学特征和抗肿瘤作用。DC-DIV/C 可以在最佳比例 1:2 同时包载 DOX·HCl 和 CQ。体外和体内实验证实,DC-DIV/C 在血液循环、细胞摄取和细胞内释放过程中是一种同时递运 DOX·HCl 和 CQ 的优秀载体。此外,CQ 完成自噬抑制以降低 DOX·HCl 耐药癌细胞的 IC。因此,DC-DIV/C 对 K562/ADR 肿瘤表现出了极好的抗肿瘤效果,TIR 为 84.52%。本研究为精确联合治疗提供了一种有前途的、强大的策略,以实现治疗效果的增强。
Nanotechnology. 2018-11-30
J Control Release. 2021-9-10
Neurosurg Focus. 2014-12
J Funct Biomater. 2025-8-2
Small Sci. 2025-4-11
Int J Mol Sci. 2024-1-12
Nat Rev Cancer. 2021-5
Chin J Cancer. 2017-6-24