针对HER2的明星聚合物结合物改善了瘤分布和疗效
Silvia Sonzini1, Richard M England2, Alexander N Kapustin1
1Advanced Drug Delivery, Pharmaceutical Sciences, R&D, AstraZeneca, Cambridge, UK.
概括
向纳米颗粒显示改善了瘤的输送和疗效. 针对HER2的恒星聚合物 (HER2-SDs) 在HER2阳性胃癌模型中显示出增强的瘤积累和抗瘤活性.
科学领域:
- 纳米技术 纳米技术
- 材料科学 材料科学 材料科学
- 在瘤学瘤学.
背景情况:
- 积极向的纳米粒子系统提供了与非向系统相比,改善瘤药物输送的潜力.
- 优化目标交付的设计原则仍然是积极研究的领域.
- 了解受体介导向对于提高治疗结果至关重要.
研究的目的:
- 调查 HER2 向聚合物药物递送系统 (HER2-SD) 的有效性,以向过度表达 HER2 的癌细胞.
- 评估HER2向星聚合物对体外结合,体内生物分布,瘤透和抗瘤活性的影响.
- 为了比较不同HER2-Fab密度的HER2-向恒星聚合物与非向对照的性能.
主要方法:
- 一种32臂星聚合物 (SD) 与SN-38 (TOP1抑制剂) 结合的合成,以及不同密度的trastuzumab抗原结合片段 (HER2-Fab).
- 在HER2阳性细胞系中结合和吸收的体外评估 (SK-BR3,HEK293).
- 在携带瘤的小鼠体内生物分布研究,瘤透分析,以及在HER2阳性胃癌异种移植模型中进行抗瘤疗效测试.
主要成果:
- 与非向SDs相比,HER2-向星聚合物 (HER2-SDs) 在HER2-阳性细胞系中表现出优异的结合和吸收.
- 活体研究显示,HER2-SDs在瘤中的积累增加,局部化改善,瘤核心透和均分布,特别是在剂后96小时.
- 向星聚合物SN-38合物在HER2阳性胃癌异种移植模型中表现出明显更大的抗瘤疗效,而不是非向SDs.
结论:
- 向HER2的恒星聚合物有效地向HER2过度表达的癌细胞,并增强向瘤的药物输送.
- 针对性纳米颗粒的设计可以显著改善瘤积累,透和治疗效率.
- 这项研究为癌症治疗的积极向纳米粒子系统的设计规则提供了宝贵的见解.
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