Microfluidic-assisted silk nanoparticle tuning

Wongpinyochit, Thidarat and Totten, John D. and Johnston, Blair F. and Seib, F. Philipp (2019) Microfluidic-assisted silk nanoparticle tuning. Nanoscale Advances, 1 (2). pp. 873-883.

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    Abstract

    Silk is now making inroads into advanced pharmaceutical and biomedical applications. Both bottom-up and top-down approaches can be applied to silk and the resulting aqueous silk solution can be processed into a range of material formats, including nanoparticles. Here, we demonstrate the potential of microfluidics for the continuous production of silk nanoparticles with tuned particle characteristics. Our microfluidic-based design ensured efficient mixing of different solvent phases at the nanoliter scale, in addition to controlling the solvent ratio and flow rates. The total flow rate and aqueous : solvent ratios were important parameters affecting yield (1 mL min−1 > 12 mL min−1). The ratios also affected size and stability; a solvent : aqueous total flow ratio of 5 : 1 efficiently generated spherical nanoparticles 110 and 215 nm in size that were stable in water and had a high beta-sheet content. These 110 and 215 nm silk nanoparticles were not cytotoxic (IC50 > 100 μg mL−1) but showed size-dependent cellular trafficking. Overall, microfluidic-assisted silk nanoparticle manufacture is a promising platform that allows control of the silk nanoparticle properties by manipulation of the processing variables.

    Author(s):Wongpinyochit, Thidarat ORCID: https://orcid.org/0000-0003-1339-6908, Totten, John D. ORCID: https://orcid.org/0000-0001-9665-1569, Johnston, Blair F. ORCID: https://orcid.org/0000-0001-9785-6822 and Seib, F. Philipp ORCID: https://orcid.org/0000-0002-1955-1975
    Item type:Article
    ID code:66520
    Keywords:silk, nanoparticle tuning, pharmaceutical applications of silk, Pharmacy and materia medica, Pharmacology, Toxicology and Pharmaceutics(all)
    Subjects:Medicine > Pharmacy and materia medica
    Department:Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
    Technology and Innovation Centre > Bionanotechnology
    Depositing user: Pure Administrator
    Date deposited:10 Jan 2019 12:24
    Last modified:15 Oct 2019 07:13
    URI:https://strathprints.strath.ac.uk/id/eprint/66520
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