内化
胶束
生物物理学
化学
纳米颗粒
精氨酸
纳米技术
体内
细胞
材料科学
生物化学
氨基酸
水溶液
生物
物理化学
生物技术
作者
Sarah R. MacEwan,Ashutosh Chilkoti
出处
期刊:Nano Letters
[American Chemical Society]
日期:2012-05-31
卷期号:12 (6): 3322-3328
被引量:93
摘要
Cell-penetrating peptides (CPPs) are a class of molecules that enable efficient internalization of a wide variety of cargo in diverse cell types, making them desirable for delivery of anticancer drugs to solid tumors. For CPPs to be useful, it is important to be able to turn their function on in response to an external trigger that can be spatially localized in vivo. Here we describe an approach to turning on CPP function by modulation of the local density of arginine (Arg) residues by temperature-triggered micelle assembly of diblock copolymer elastin-like polypeptides (ELP(BC)s). A greater than 8-fold increase in cellular uptake occurs when Arg residues are presented on the corona of ELP(BC) micelles, as compared to the same ELP(BC) at a temperature in which it is a soluble unimer. This approach is the first to demonstrate digital 'off-on' control of CPP activity by an extrinsic thermal trigger in a clinically relevant temperature range by modulation of the interfacial density of Arg residues on the exterior of a nanoparticle.
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