Digestive Department, The Affiliated Hospital of Guilin Medical College, Guilin, 541001, People's Republic of China.
Int J Nanomedicine. 2024 Nov 1;19:11105-11128. doi: 10.2147/IJN.S479425. eCollection 2024.
PURPOSE: Ferroptosis is a regulated form of cell death characterized by iron-dependent accumulation of associated lipid peroxides (LPO), which can induce cell death when a certain level is reached. However, the extremely complex tumor microenvironment (TME) has the characteristics of antioxidant, even if it induces ferroptosis of tumor cells, its killing effect on tumor cells is still very limited. To solve this problem, we constructed a novel nanomaterials (GOx/EC@FeO@CCM). We evaluated the anticancer effect of this nanomaterial in inhibiting tumor growth through comprehensive in vitro and in vivo experiments. METHODS: We successfully synthesized GOx/EC@FeO by one-pan synthesis method, then coated the Hepatocellular carcinoma cell membrane on its surface by co-extrusion technology, and finally synthesized the GOx/EC@FeO@CCM nanoplatforms. We characterized the compounds in terms of morphology, particle size, and Zeta potential. In addition, we also studied the anti-tumor effect of GOx/EC@FeO@CCM nanoplatforms from the following aspects, including the performance test of the nanoplatform, the intracellular effect of the nanoplatform, the anti-tumor effect in vitro, the intracellular ROS analysis, the intracellular effect of EC, and the anti-tumor effect in vivo. RESULTS: The iron-based carriers in GOx/EC@FeO@CCM nanoplatforms are released and produce ferrous ions (Fe) in an acidic environment. Due to the limitation of the endogenous level of hydrogen peroxide (HO), we introduced GOx into the TME or tumor cells. Under the catalysis of GOx, glucose reacted rapidly to produce a large amount of HO, which then combined with Fe to produce a large number of Hydroxyl radical (·OH). Its toxicity leads to dysfunction of cell membrane and organelles, and then causes cell damage. EC inhibits Nuclear factor erythroid 2-related factor 2 (Nrf2) in cancer cells, which effectively down-regulates downstream gene products, including NAD(P)H quinone oxidoreductase 1 (NQO1) and heme oxygenase 1 (HMOX1). A series of chain reactions reduce the escape effect of oxidative stress (OS) and effectively maintain a high level of intracellular oxidation. Furthermore, it induces sustained and intense ferroptosis in tumor cells. Finally, the use of cancer cell membrane modified nanoplatforms due to the homology of membrane protein components improves the tumor cell targeting of the nanoplatforms, showing significant tumor cell inhibition and killing effect in vivo. CONCLUSION: The results showed that the GOx/EC@FeO@CCM nanoplatforms successfully induced significant ferroptosis of Hepatocellular carcinoma cells through a cascade effect, and finally effectively promoted cancer cell regression.
目的:铁死亡是一种受调控的细胞死亡形式,其特征是铁依赖性的脂质过氧化物(LPO)积累,如果达到一定水平,会诱导细胞死亡。然而,极其复杂的肿瘤微环境(TME)具有抗氧化的特性,即使它诱导肿瘤细胞发生铁死亡,其对肿瘤细胞的杀伤作用仍然非常有限。为了解决这个问题,我们构建了一种新型纳米材料(GOx/EC@FeO@CCM)。我们通过综合的体外和体内实验评估了这种纳米材料抑制肿瘤生长的抗癌效果。
方法:我们通过一锅合成法成功合成了 GOx/EC@FeO,然后通过共挤出技术将肝癌细胞膜包覆在其表面,最后合成了 GOx/EC@FeO@CCM 纳米平台。我们从形态、粒径和 Zeta 电位等方面对化合物进行了表征。此外,我们还从以下几个方面研究了 GOx/EC@FeO@CCM 纳米平台的抗肿瘤作用,包括纳米平台的性能测试、纳米平台的细胞内作用、体外抗肿瘤作用、细胞内 ROS 分析、EC 的细胞内作用和体内抗肿瘤作用。
结果:GOx/EC@FeO@CCM 纳米平台中的铁基载体在酸性环境中释放并产生亚铁离子(Fe)。由于内源性过氧化氢(HO)水平的限制,我们将 GOx 引入 TME 或肿瘤细胞中。在 GOx 的催化下,葡萄糖迅速反应生成大量 HO,然后与 Fe 结合生成大量羟自由基(·OH)。其毒性导致细胞膜和细胞器功能障碍,进而导致细胞损伤。EC 抑制癌细胞中的核因子红细胞 2 相关因子 2(Nrf2),从而有效下调下游基因产物,包括 NAD(P)H 醌氧化还原酶 1(NQO1)和血红素加氧酶 1(HMOX1)。一系列反应降低了氧化应激(OS)的逃逸效应,并有效地维持了细胞内氧化的高水平。此外,它在肿瘤细胞中诱导持续强烈的铁死亡。最后,由于膜蛋白成分的同源性,使用癌细胞膜修饰的纳米平台提高了纳米平台对肿瘤细胞的靶向性,在体内表现出明显的肿瘤细胞抑制和杀伤作用。
结论:结果表明,GOx/EC@FeO@CCM 纳米平台通过级联效应成功诱导肝癌细胞发生显著的铁死亡,最终有效促进了癌细胞的消退。
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