Peer Reviewed

1

Document Type

Article

Publication Date

1-12-2014

Keywords

Administration, Inhalation, Cell Line, Gene Expression Regulation, Genes, Reporter, High-Throughput Screening Assays, Humans, Luciferases, Nanoparticles, Nebulizers and Vaporizers, Particle Size, RNA Interference, RNA, Small Interfering, Time Factors, Transfection, beta-Cyclodextrins

Funder/Sponsor

This work was funded by Science Foundation Ireland SFI 07/SRC/B1154.

Comments

Final publication is available from Mary Ann Liebert, Inc., publishers http://dx.doi.org/10.1089/jamp.2013.1045

Abstract

BACKGROUND: Successful delivery of small interfering RNA (siRNA) to the lungs remains hampered by poor intracellular delivery, vector-mediated cytotoxicity, and an inability to withstand nebulization. Recently, a novel cyclodextrin (CD), SC12CDClickpropylamine, consisting of distinct lipophilic and cationic subunits, has been shown to transfect a number of cell types. However, the suitability of this vector for pulmonary siRNA delivery has not been assessed to date. To address this, a series of high-content analysis (HCA) and postnebulization assays were devised to determine the potential for CD-siRNA delivery to the lungs.

METHODS: SC12CDClickpropylamine-siRNA mass ratios (MRs) were examined for size and zeta potential. In-depth analysis of nanocomplex uptake and toxicity in Calu-3 bronchial epithelial cells was examined using IN Cell(®) HCA assays. Nebulized SC12CDClickpropylamine nanocomplexes were assessed for volumetric median diameter (VMD) and fine particle fraction (FPF) and compared with saline controls. Finally, postnebulization stability was determined by comparing luciferase knockdown elicited by SC12CDClickpropylamine nanocomplexes before and after nebulization.

RESULTS: SC12CDClickpropylamine-siRNA complexation formed cationic nanocomplexes of ≤200 nm in size depending on the medium and led to significantly higher levels of siRNA associated with Calu-3 cells compared with RNAiFect-siRNA-treated cells at all MRs (p

CONCLUSIONS: SC12CDClickpropylamine nanocomplexes can be effectively nebulized for pulmonary delivery of siRNA using Aeroneb technology to mediate knockdown in airway cells. To the best of our knowledge, this is the first study examining the suitability of SC12CDClickpropylamine-siRNA nanocomplexes for pulmonary delivery. Furthermore, this work provides an integrated nanomedicine-device combination for future in vitro and in vivo preclinical and clinical studies of inhaled siRNA therapeutics.

Disciplines

Pharmacy and Pharmaceutical Sciences

Citation

Hibbitts A, O'Mahony AM, Forde E, Nolan L, Ogier J, Desgranges S, Darcy R, MacLoughlin R, O'Driscoll CM, Cryan SA. Early-stage development of novel cyclodextrin-siRNA nanocomplexes allows for successful postnebulization transfection of bronchial epithelial cells. Journal of Aerosol Medicine and Pulmonary Drug Delivery. 2014;27(6):466-77.

PubMed ID

24665866

DOI Link

10.1089/jamp.2013.1045

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License.

Share

COinS