Bromelain surface modification increases the diffusion of silica nanoparticles in the tumor extracellular matrix.

Bromelain surface modification increases the diffusion of silica nanoparticles in the tumor extracellular matrix.
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溴烯表面改性会增加二氧化硅纳米颗粒在肿瘤外基质中的扩散。

DOI:
10.1021/nn502807n
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发表时间:
2014-10-28
期刊:
影响因子:
17.1
通讯作者:
Tasciotti, Ennio
Tasciotti, Ennio
中科院分区:
材料科学1区
文献类型:
--
作者:
Parodi, Alessandro;Haddix, Seth G.;Taghipour, Nima;Scaria, Shilpa;Taraballi, Francesca;Cevenini, Armando;Yazdi, Iman K.;Corbo, Claudia;Palomba, Roberto;Khaled, Sm Z.;Martinez, Jonathan O.;Brown, Brandon S.;Isenhart, Lucas;Tasciotti, Ennio

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肿瘤细胞外基质(ECM)是治疗剂和药物递送系统在癌实质中扩散的主要障碍。这种生物屏障限制了有希望的治疗方法的功效,包括递送siRNA或旨在用于热消融的试剂。在由于肿瘤脉管系统的增强的渗透和保留效应而外渗后,典型的纳米治疗剂不能到达癌实质深处的非血管化和缺氧区域。在这里,我们开发了一种简单的方法来提供具有蛋白水解表面的介孔二氧化硅纳米颗粒(MSN)。在这种程度上,我们选择将MSN与菠萝蛋白酶(Br-MSN)缀合,菠萝蛋白酶是从菠萝茎纯化的粗酶复合物,其属于肽酶木瓜蛋白酶家族。这种表面修饰增加了内皮细胞、巨噬细胞和癌细胞系中的颗粒摄取,对细胞活力的影响最小。最重要的是,Br-MSN在体外和体内显示出在肿瘤ECM中消化和扩散的能力增加。
Tumor extracellular matrix (ECM) represents a major obstacle to the diffusion of therapeutics and drug delivery systems in cancer parenchyma. This biological barrier limits the efficacy of promising therapeutic approaches including the delivery of siRNA or agents intended for thermoablation. After extravasation due to the enhanced penetration and retention effect of tumor vasculature, typical nanotherapeutics are unable to reach the nonvascularized and anoxic regions deep within cancer parenchyma. Here, we developed a simple method to provide mesoporous silica nanoparticles (MSN) with a proteolytic surface. To this extent, we chose to conjugate MSN to Bromelain (Br–MSN), a crude enzymatic complex, purified from pineapple stems, that belongs to the peptidase papain family. This surface modification increased particle uptake in endothelial, macrophage, and cancer cell lines with minimal impact on cellular viability. Most importantly Br–MSN showed an increased ability to digest and diffuse in tumor ECM in vitro and in vivo.
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