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Elucidation of the physicochemical properties and potency of siRNA-loaded small-sized lipid nanoparticles for siRNA delivery

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Title: Elucidation of the physicochemical properties and potency of siRNA-loaded small-sized lipid nanoparticles for siRNA delivery
Authors: Sato, Yusuke Browse this author →KAKEN DB
Note, Yusuke Browse this author
Maeki, Masatoshi Browse this author
Kaji, Noritada Browse this author →KAKEN DB
Baba, Yoshinobu Browse this author →KAKEN DB
Tokeshi, Manabu Browse this author →KAKEN DB
Harashima, Hideyoshi Browse this author →KAKEN DB
Keywords: Small-sized lipid nanoparticles
siRNA delivery
Microfluidic device
Protein adsorption
Endosomal escape
Issue Date: 10-May-2016
Publisher: Elsevier
Journal Title: Journal of controlled release
Volume: 229
Start Page: 48
End Page: 57
Publisher DOI: 10.1016/j.jconrel.2016.03.019
PMID: 26995758
Abstract: Because nanoparticles with diameters less than 50 nm penetrate stromal-rich tumor tissues more efficiently, the synthesis of small-sized nanoparticles encapsulating short interfering RNA (siRNA) is important in terms of realizing novel siRNA medicine for the treatment of various cancers. Lipid nanoparticles (LNPs) are the leading systems for the delivery of siRNA in vivo. Limit size LNPs were successfully synthesized using a microfluidic mixing technique. However, the physicochemical properties and potential for in vivo siRNA delivery of the limit-size LNPs have not been examined in detail. In the present study, we prepared LNPs with different diameters from 32 to 67 nm using a microfluidic mixing devise and examined the physicochemical properties of the particles and the potential for their use in delivering siRNA in vitro and in vivo to liver. Reducing the size of the LNPs causes poor-packing and an increased surface area, which result in their instability in serum. Moreover, it was revealed that the ability of endosomal escape (cytosolic siRNA release) of the smaller LNPs is subject to inhibition by serum compared to that of larger counterparts. Taken together, an increase in packing and avoiding the adsorption of serum components are key strategies for the development of next-generation highly potent and small-sized LNPs. (C) 2016 Elsevier B.V. All rights reserved.
Rights: ©2016 , Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:薬学研究院 (Faculty of Pharmaceutical Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐藤 悠介

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