School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
Int J Nanomedicine. 2020 Apr 30;15:2987-2998. doi: 10.2147/IJN.S242490. eCollection 2020.
BACKGROUND: Emerging cancer therapy requires highly sensitive diagnosis in combination with cancer-targeting therapy. In this study, a self-assembled pH-sensitive curcumin (Cur)-loaded nanoparticle of Tc radiolabeled hyaluronan-cholesteryl hemisuccinate conjugates (HA-CHEMS) and D-a-tocopheryl polyethylene glycol succinate (TPGS) was prepared for breast cancer synergistic theranostics. MATERIALS AND METHODS: The synthesized amphiphilic HA-CHEMS conjugates and TPGS self-assembled into Cur-loaded nanoparticles (HA-CHEMS-Cur-TPGS NPs) in an aqueous environment. The physicochemical properties of HA-CHEMS-Cur-TPGS NPs were characterized by transmission electron microscopy (TEM) and dynamic lighter scattering (DLS). The in vitro cytotoxicity of HA-CHEMS-Cur-TPGS NPs against breast cancer cells was evaluated by using the methyl thiazolyl tetrazolium (MTT) assay. Moreover, the in vivo animal experiments of HA-CHEMS-Cur-TPGS NPs including SPECT/CT imaging biodistribution and antitumor efficiency were investigated in 4T1 tumor-bearing BALB/c mice; furthermore, pharmacokinetics were investigated in healthy mice. RESULTS: HA-CHEMS-Cur-TPGS NPs exhibited high curcumin loading, uniform particle size distribution, and excellent stability in vitro. In the cytotoxicity assay, HA-CHEMS-Cur-TPGS NPs showed remarkably higher cytotoxicity to 4T1 cells with an IC50 value at 38 μg/mL, compared with free curcumin (77 μg/mL). Moreover, HA-CHEMS-Cur-TPGS NPs could be effectively and stably radiolabeled with Tc. The SPECT images showed that Tc-HA-CHEMS-Cur-TPGS NPs could target the 4T1 tumor up to 4.85±0.24%ID/g at 4 h post-injection in BALB/c mice. More importantly, the in vivo antitumor efficacy studies showed that HA-CHEMS-Cur-TPGS NPs greatly inhibited the tumor growth without resulting in obvious toxicities to major organs. CONCLUSION: The results indicated that HA-CHEMS-Cur-TPGS NPs with stable Tc labeling and high curcumin-loading capacity hold great potential for breast cancer synergistic theranostics.
背景:新兴的癌症治疗需要高度敏感的诊断,结合癌症靶向治疗。在这项研究中,一种自组装的 pH 敏感姜黄素(Cur)负载的纳米粒子由放射性标记的透明质酸-胆固醇琥珀酸酯缀合物(HA-CHEMS)和 D-a-生育酚聚乙二醇琥珀酸酯(TPGS)组成,用于乳腺癌协同治疗。 材料和方法:合成的两亲性 HA-CHEMS 缀合物和 TPGS 在水相环境中自组装成 Cur 负载的纳米粒子(HA-CHEMS-Cur-TPGS NPs)。通过透射电子显微镜(TEM)和动态光散射(DLS)对 HA-CHEMS-Cur-TPGS NPs 的物理化学性质进行了表征。采用噻唑蓝(MTT)法评价 HA-CHEMS-Cur-TPGS NPs 对乳腺癌细胞的体外细胞毒性。此外,在 4T1 荷瘤 BALB/c 小鼠中进行了 HA-CHEMS-Cur-TPGS NPs 的体内动物实验,包括 SPECT/CT 成像生物分布和抗肿瘤效率,并在健康小鼠中进行了药代动力学研究。 结果:HA-CHEMS-Cur-TPGS NPs 表现出高姜黄素载量、均匀的粒径分布和体外优异的稳定性。在细胞毒性试验中,HA-CHEMS-Cur-TPGS NPs 对 4T1 细胞表现出明显更高的细胞毒性,IC50 值为 38μg/mL,而游离姜黄素为 77μg/mL。此外,HA-CHEMS-Cur-TPGS NPs 可以有效地稳定地放射性标记 Tc。SPECT 图像显示,Tc-HA-CHEMS-Cur-TPGS NPs 在注射后 4 小时在 BALB/c 小鼠中可达到 4.85±0.24%ID/g 的 4T1 肿瘤靶标。更重要的是,体内抗肿瘤疗效研究表明,HA-CHEMS-Cur-TPGS NPs 能显著抑制肿瘤生长,而对主要器官无明显毒性。 结论:结果表明,具有稳定 Tc 标记和高姜黄素载量的 HA-CHEMS-Cur-TPGS NPs 具有用于乳腺癌协同治疗的巨大潜力。
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