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新洞察!科学家揭示了一种更安全、更有效的动脉粥样硬化治疗药物输送系统

2022-06-29 生物谷 生物谷

在本研究中,研究者成功地设计了整合素αv CTSK 3靶向和β响应性纳米颗粒的整合,并展示了有望用于动脉粥样硬化治疗的潜力。

动脉粥样硬化是一种慢性炎症性疾病,其特征是脂质、免疫细胞和炎性细胞因子在血管内膜中积聚。传统的口服药物(包括他汀类药物、抗血小板药物和血管扩张剂)由于其非特异性分布和较差的水溶性而限制了动脉粥样硬化的治疗。此外,长期治疗可能会导致严重的副作用,如肝脏损伤、肌肉疼痛和糖尿病

图片来源: https://pubmed.ncbi.nlm.nih.gov/35673565/

近日,来自四川大学的研究者们在Theranostics杂志上发表了题为“Inflammatory endothelium-targeted and cathepsin responsive nanoparticles are effective against atherosclerosis”的文章,该研究揭示了RAP@T/R纳米粒作为一种更安全、更有效的动脉粥样硬化治疗药物输送系统具有很大的前景。

动脉粥样硬化的特征是脂质堆积、斑块形成和动脉狭窄。药物治疗是治疗动脉粥样硬化的一种有前景的治疗方法,但这种方法面临着靶向给药、控制释放和非特异性清除等重大挑战。基于动脉粥样硬化病变中组织蛋白酶K(cathepsin k,CTSK)酶的富集性,研究者构建了靶向CTSK应答的整合素αvβ3纳米粒来控制局部雷帕霉素(RAP)的释放。

靶向和响应性纳米粒子(T/R NPs)是由靶向聚合物PLGA-PEG-c(RGDfC)和CTSK敏感聚合物PLGA-Pep-PEG自组装而成的。研究者还用一对FRET探针对PLGA-Pep-PEG进行了修饰,以监测其水解过程。

研究结果表明,RAP@T/R纳米粒在体外加速了RAP对CTSK刺激的释放,从而显著抑制了炎症巨噬细胞对OxLDL的吞噬和细胞因子的释放。此外,在动脉粥样硬化病变的早期和晚期,T/R纳米粒具有延长血液滞留时间和增加蓄积的作用。RAP@T/R纳米粒显著阻断ApoE-/-小鼠动脉粥样硬化的发展,抑制全身和局部炎症反应。

CTSK敏感纳米颗粒的工程原理图和动脉粥样硬化的靶向治疗及纳米颗粒的表征

图片来源: https://pubmed.ncbi.nlm.nih.gov/35673565/

综上所述,在本研究中,研究者成功地设计了整合素αv CTSK 3靶向和β响应性纳米颗粒的整合,并展示了有望用于动脉粥样硬化治疗的潜力。

参考文献

Fei Fang et al. Inflammatory endothelium-targeted and cathepsin responsive nanoparticles are effective against atherosclerosis. Theranostics. 2022 May 16;12(9):4200-4220. doi: 10.7150/thno.70896.

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