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Study and evaluation of mechanisms of dual targeting drug delivery system with tumor microenvironment assays compared with normal assays.

机译:与正常分析相比,采用肿瘤微环境分析对双靶向药物递送系统的机理进行了研究和评估。

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A dual targeting delivery system was developed to completely conquer the two barriers that glioma treatment faces: the blood-brain barrier (BBB) and the brain-glioma barrier. Recently, a system comprising AS1411 aptamer (for glioma targeting) and TGN peptide (for BBB targeting) modified nanoparticles (AsTNPs) was developed, which can effectively target brain glioma and improve the survival of glioma-bearing mice. However, the in vitro models currently used are far too different from the in vivo tumor microenvironment that the glioma targeting delivery system actually faces. In this study, the pharmacology mechanisms of AsTNPs were explored in several models that imitated the tumor microenvironment. AsTNPs can be selectively taken up by endothelial and glioma cells, effectively penetrating the BBB and brain-glioma barriers to reach glioma cells and display their anti-glioma effect. The cell monolayers, tumor spheroids and coculture systems were more suitable in vitro models for the pharmacology evaluation of targeted drug delivery systems.
机译:开发了双重靶向递送系统,以完全克服胶质瘤治疗面临的两个障碍:血脑屏障(BBB)和脑胶质瘤屏障。最近,开发了一种包含AS1411适体(用于胶质瘤靶向)和TGN肽(用于BBB靶向)修饰的纳米粒子(AsTNPs)的系统,该系统可以有效靶向脑胶质瘤并改善荷胶质瘤小鼠的存活率。但是,当前使用的体外模型与神经胶质瘤靶向递送系统实际面对的体内肿瘤微环境相差太大。在这项研究中,在模拟肿瘤微环境的几种模型中探索了AsTNPs的药理机制。内皮细胞和神经胶质瘤细胞可以选择性吸收AsTNPs,有效穿透血脑屏障和脑神经胶质瘤屏障,到达神经胶质瘤细胞并发挥抗神经胶质瘤的作用。细胞单层,肿瘤球体和共培养系统更适合用于靶向药物递送系统的药理学评估的体外模型。

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