Neural stem cells improve intracranial nanoparticle retention and tumor-selective distribution.

Neural stem cells improve intracranial nanoparticle retention and tumor-selective distribution.
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DOI:
10.2217/fon.13.217
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发表时间:
2014-03
期刊:
Future oncology (London, England)
影响因子:
--
通讯作者:
Aboody KS
Aboody KS
中科院分区:
其他
文献类型:
--
作者:
Mooney R;Weng Y;Tirughana-Sambandan R;Valenzuela V;Aramburo S;Garcia E;Li Z;Gutova M;Annala AJ;Berlin JM;Aboody KS

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这项工作的目的是确定肿瘤嗜性神经干细胞(NSC)是否可以改善侵袭性脑肿瘤内纳米颗粒(NPs)的肿瘤选择性分布和保留。将链霉亲和素缀合的聚苯乙烯NP表面偶联至生物素化的人NSC。这些纳米颗粒很大(798 nm),但当与嗜性细胞结合时,它们太大而不能被动地扩散通过脑组织或穿过血液肿瘤屏障。在注射后4天,对位于脑内胶质瘤附近、对侧半球或静脉内的NP分布和保留进行定量。在所有三种体内注射范例中,NSC偶联的NP表现出比游离NP悬浮液显著改善的肿瘤选择性分布和保留。这些结果提供了NSC可以促进NPs的肿瘤选择性分布的原理证明,这是一个可用于改善颅内药物递送的平台。
The purpose of this work is to determine if tumor-tropic neural stem cells (NSCs) can improve the tumor-selective distribution and retention of nanoparticles (NPs) within invasive brain tumors. Streptavidin-conjugated, polystyrene NPs are surface-coupled to biotinylated human NSCs. These NPs are large (798 nm), yet when conjugated to tropic cells, they are too large to passively diffuse through brain tissue or cross the blood–tumor barrier. NP distribution and retention was quantified 4 days after injections located either adjacent to an intracerebral glioma, in the contralateral hemisphere, or intravenously. In all three in vivo injection paradigms, NSC-coupled NPs exhibited significantly improved tumor-selective distribution and retention over free-NP suspensions. These results provide proof-of-principle that NSCs can facilitate the tumor-selective distribution of NPs, a platform useful for improving intracranial drug delivery.
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