Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Lane 826, Zhangheng Road, Shanghai 201203, PR China.
Department of Pharmacology, Institute of Medical Sciences, Shanghai Jiaotong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, PR China.
Biomaterials. 2016 Sep;101:60-75. doi: 10.1016/j.biomaterials.2016.05.037. Epub 2016 May 24.
The pathological and physiological barriers of glioblastoma multiforme (GBM) lead to insufficient extravasation and penetration of nano-sized therapeutics. As the main driver of interstitial fluid pressure-related drug efflux, the aberrant extracellular matrix (ECM) appears to be a valuable target that plays a crucial role in forming pathological barriers of GBM. Herein, a new Ft peptide was synthesized by coupling FHK and tLyp-1 sequence together via a cysteine to synergistically target glioma-associated tenascin C (extracellular matrix component) and neuropilin-1 on neovasculature and glioma cells to enable specific penetration of nanoparticles for anti-glioblastoma treatment. In vitro, Ft peptide-functionalization not only enabled the internalization of poly (ethyleneglycol)-poly (lactic acid) nanoparticulate system in 2D U87 MG cells and HUVEC cells but also facilitated its deep penetration in 3D glioma spheroids. Similarly, in vivo real-time 2D and 3D imaging clearly showed a substantial accumulation of the Ft-functionalized nanoparticles (Ft-NP) in the glioma foci of intracranial U87 glioma-bearing mice. Glioma distribution assay demonstrated a tenascin C-mediated accumulation in glioma foci and neuropilin-1-mediated transportation through glioma cells. Paclitaxel-loaded Ft-NP (Ft-NP-PTX) induced higher cytotoxic effect and apoptosis rate compared with FHK or tLyp-1-modified ones. The highest anti-glioma efficacy was also achieved following the i.v. administration of Ft-NP-PTX, with a median survival promotion of 269% than that of the saline-treated mice, while only limited life span promotion was obtained after the treatment of other formulations (31.3%, 59.4%, 134.4% and 109.3% respectively for Taxol(®), NP-PTX, tLyp-1-NP-PTX and FHK-NP-PTX). In conclusion, all these evidences together verified the improved therapeutic effect of Ft-NP-PTX for anti-glioma drug delivery via neuropilin-1- and tenascin C-mediated specific penetration of nanoparticles in to glioma parenchyma.
胶质母细胞瘤(GBM)的病理和生理屏障导致纳米级治疗药物的渗出和穿透不足。异常细胞外基质(ECM)作为与间质液压力相关的药物外排的主要驱动因素,似乎是一个有价值的靶点,在形成 GBM 的病理性屏障中起着关键作用。在此,通过将 FHK 和 tLyp-1 序列通过半胱氨酸偶联在一起合成了一种新的 Ft 肽,以协同靶向神经纤毛蛋白-1(新生血管和神经胶质细胞上的 ECM 成分)和神经胶质细胞上的 tenascin C,使纳米颗粒能够特异性穿透,用于抗神经胶质瘤治疗。在体外,Ft 肽功能化不仅使聚乙二醇-聚乳酸纳米颗粒系统在 2D U87MG 细胞和 HUVEC 细胞中的内化成为可能,而且还促进了其在 3D 神经胶质瘤球体中的深层渗透。同样,体内实时 2D 和 3D 成像清楚地显示了大量 Ft 功能化纳米颗粒(Ft-NP)在颅内 U87 神经胶质瘤荷瘤小鼠神经胶质瘤病灶中的积累。神经胶质瘤分布测定表明,神经纤毛蛋白-1介导的运输和 tenascin C 介导的积累都发生在神经胶质瘤病灶中。与 FHK 或 tLyp-1 修饰的纳米颗粒相比,载紫杉醇的 Ft-NP(Ft-NP-PTX)诱导更高的细胞毒性作用和细胞凋亡率。与生理盐水处理的小鼠相比,静脉注射 Ft-NP-PTX 后获得了最高的抗神经胶质瘤疗效,中位生存时间延长了 269%,而其他制剂的治疗仅获得了有限的生存时间延长(紫杉醇分别为 31.3%、59.4%、134.4%和 109.3%,NP-PTX、tLyp-1-NP-PTX 和 FHK-NP-PTX)。总之,所有这些证据共同验证了 Ft-NP-PTX 通过纳米颗粒经神经纤毛蛋白-1 和 tenascin C 介导的特异性穿透进入神经胶质瘤实质,改善了抗神经胶质瘤药物传递的治疗效果。
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