两亲性树枝状聚合物掺杂增强脂质体囊泡的pH敏感性,以实现对肝细胞癌协同铁死亡-凋亡治疗的有效共递送

Amphiphilic Dendrimer Doping Enhanced pH-Sensitivity of Liposomal Vesicle for Effective Co-delivery toward Synergistic Ferroptosis-Apoptosis Therapy of Hepatocellular Carcinoma.

作者信息

Su Yanhong, Zhang Zhao, Lee Leo Tsz On, Peng Ling, Lu Ligong, He Xu, Zhang Xuanjun

机构信息

Faculty of Health Sciences, University of Macau, Taipa, Macau, 999078, P. R. China.

Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and Treatment, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, Guangdong, 519000, P. R. China.

出版信息

Adv Healthc Mater. 2023 Jan;12(6):e2202663. doi: 10.1002/adhm.202202663. Epub 2023 Jan 30.

Abstract

Ferroptosis, characterized by the accumulation of reactive oxygen species and lipid peroxides, has emerged as an attractive strategy to reverse drug resistance. Of particular interest is the ferroptosis-apoptosis combination therapy for cancer treatment. Herein, a nanoplatform is reported for effective co-delivery of the anticancer drug sorafenib (S) and the ferroptosis inducer hemin (H), toward synergistic ferroptosis-apoptosis therapy of advanced hepatocellular carcinoma (HCC) as a proof-of-concept study. Liposome is an excellent delivery system; however, it is not sufficiently responsive to the acidic tumor microenvironment (TME) for tumor-targeted drug delivery. The pH-sensitive vesicles are therefore developed (SH-AD-L) by incorporating amphiphilic dendrimers (AD) into liposomes for controlled and pH-stimulated release of sorafenib and hemin in the acidic TME, thanks to the protonation of numerous amine functionalities in AD. Importantly, SH-AD-L not only blocked glutathione synthesis to disrupt the antioxidant system, but also increased intracellular Fe and ·OH concentrations to amplify oxidative stress, both of which contribute to enhanced ferroptosis. Remarkably, high levels of ·OH also augmented sorafenib-mediated apoptosis in tumor cells. This study demonstrates the efficacy of ferroptosis-apoptosis combination therapy, as well as the promise of the AD-doped TME-responsive vesicles for drug delivery in combination therapy to treat advanced HCC.

摘要

铁死亡以活性氧和脂质过氧化物的积累为特征,已成为一种有吸引力的逆转耐药性的策略。特别值得关注的是铁死亡-凋亡联合疗法用于癌症治疗。在此,报道了一种纳米平台,用于有效共递送抗癌药物索拉非尼(S)和铁死亡诱导剂血红素(H),作为概念验证研究用于晚期肝细胞癌(HCC)的协同铁死亡-凋亡治疗。脂质体是一种出色的递送系统;然而,它对酸性肿瘤微环境(TME)的响应不足以实现肿瘤靶向药物递送。因此,通过将两亲性树枝状大分子(AD)掺入脂质体中开发了pH敏感囊泡(SH-AD-L),用于在酸性TME中控制和pH刺激释放索拉非尼和血红素,这得益于AD中众多胺官能团的质子化。重要的是,SH-AD-L不仅阻断谷胱甘肽合成以破坏抗氧化系统,还增加细胞内铁和·OH浓度以放大氧化应激,这两者都有助于增强铁死亡。值得注意的是,高水平的·OH还增强了索拉非尼介导的肿瘤细胞凋亡。这项研究证明了铁死亡-凋亡联合疗法的疗效,以及AD掺杂的TME响应囊泡在联合疗法中用于治疗晚期HCC的药物递送的前景。

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