Surface-modified HK:siRNA nanoplexes with enhanced pharmacokinetics and tumor growth inhibition.
Surface-modified HK:siRNA nanoplexes with enhanced pharmacokinetics and tumor growth inhibition.
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DOI:
10.1021/bm3018356
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发表时间:
2013-03-11
影响因子:
6.2
通讯作者:
Mixson, A. James
中科院分区:
文献类型:
--
作者:
Chou, Szu-Ting;Leng, Qixin;Scaria, Puthupparampil;Kahn, Jason D.;Tricoli, Lucas J.;Woodle, Martin;Mixson, A. James
We characterized in this study the pharmacokinetics and antitumor efficacy of histidine-lysine (HK):siRNA nanoplexes modified with PEG and a cyclic RGD (cRGD) ligand targeting αvβ3 and αvβ5 integrins. With noninvasive imaging, systemically administered surface-modified HK:siRNA nanoplexes showed nearly 4-fold greater blood levels, 40% higher accumulation in tumor tissue, and 60% lower luciferase activity than unmodified HK:siRNA nanoplexes. We then determined whether the surface-modified HK:siRNA nanoplex carrier was more effective in reducing MDA-MB-435 tumor growth with an siRNA targeting Raf-1. Repeated systemic administration of the selected surface modified HK:siRNA nanoplexes targeting Raf-1 showed 35% greater inhibition of tumor growth than unmodified HK:siRNA nanoplexes and 60% greater inhibition of tumor growth than untreated mice. The improved blood pharmacokinetic results and tumor localization observed with the integrin-targeting surface modification of HK:siRNA nanoplexes correlated with greater tumor growth inhibition. This investigation reveals that through control of targeting ligand surface display in association with a steric PEG layer, modified HK: siRNA nanoplexes show promise to advance RNAi therapeutics in oncology and potentially other critical diseases.
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影响因子:
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作者:
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影响因子:
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作者:
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通讯作者:
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