Effect of particle diameter and surface composition on the spontaneous fusion of monolayer-protected gold nanoparticles with lipid bilayers.

Effect of particle diameter and surface composition on the spontaneous fusion of monolayer-protected gold nanoparticles with lipid bilayers.
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DOI:
10.1021/nl401365n
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发表时间:
2013-09-11
期刊:
影响因子:
10.8
通讯作者:
Alexander-Katz A
Alexander-Katz A
中科院分区:
材料科学1区
文献类型:
--
作者:
Van Lehn RC;Atukorale PU;Carney RP;Yang YS;Stellacci F;Irvine DJ;Alexander-Katz A

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阴离子、单层保护的金纳米颗粒(AuNPs)已被证明可以无中断地穿透细胞膜。在这里,我们表明,渗透过程的关键第一步是潜在的这种AuNPs与脂质双层的融合。自由能计算、单层和多层囊泡实验以及细胞研究都支持这一假说。此外,我们还表明,熔融只对核直径小于临界尺寸的AuNPs有利,这取决于单分子膜的组成。
Anionic, monolayer-protected gold nanoparticles (AuNPs) have been shown to nondisruptively penetrate cellular membranes. Here, we show that a critical first step in the penetration process is potentially the fusion of such AuNPs with lipid bilayers. Free energy calculations, experiments on unilamellar and multilamellar vesicles, and cell studies all support this hypothesis. Furthermore, we show that fusion is only favorable for AuNPs with core diameters below a critical size that depends on the monolayer composition.
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