Unique size and shape-dependent uptake behaviors of non-spherical nanoparticles by endothelial cells due to a shearing flow

JOURNAL OF CONTROLLED RELEASE

卷:245

Article

Jurney, Patrick¹  Agarwal, Rachit²  Singh, Vikramjit¹  Choi, David¹  Roy, Krishnendu²  Sreenivasan, S. V.¹  Shi, Li¹ 

[1] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[2] Georgia Inst Technol, Dept Mech Engn, Atlanta, GA 30332 USA

关键词: Nanoparticle drug delivery;    Nanoparticle shape;    Shear stress;    Endothelial cell culture;   

DOI  :  10.1016/j.jconrel.2016.11.033

来源: Elsevier

【 摘 要 】

The size and shape of nanoparticle (NP) drug carriers can potentially be manipulated to increase the drug delivery efficacy because of their effects on particle margination and interactions with various cells in vivo. It is found in this work that the presence of a physiologically relevant shearing flow rate results in very different size and shape-dependent uptake behavior of negatively charged, non-spherical polyethylene glycol (PEG) hydrogel NPs by endothelial cells (ECs) cultured in a microchannel compared to uptake of either identical NPs in static culture or spherical particles in a shear flow. In particular, larger rod- and disk-shaped PEG NPs show more uptake than smaller ones, opposite to the size effect observed for spherical particles in a flow. Moreover, the trend observed in this dynamic uptake experiment also differs from that reported for uptake of similar PEG NPs by ECs in a static culture, where the smaller disks were found to be uptaken the most. These differences suggest that the increasing rotational and tumbling motions of larger-size non-spherical NPs in the flow play a dominant role in NP margination and cell interaction, compared to Brownian motion, gravity, and cell membrane deformation energy. These findings suggest that the coupling between NP geometry and shear flow is an important factor that needs to be accounted for in the design of the size and shape of nanocarriers. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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