Fluorescent polymer nanoparticles for skin penetration and distribution

Using nanoparticulate systems for transdermal delivery has emerged as an increasingly important approach in targeted drug delivery. Such nanosystems are also expected to enhance transdermal transport of active molecules into and/or across the skin without causing any significant skin damage. However...

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Main Author: Xu, Meng
Other Authors: Pu Kanyi
Format: Theses and Dissertations
Language:English
Published: 2017
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Online Access:http://hdl.handle.net/10356/72370
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-723702023-03-03T16:01:59Z Fluorescent polymer nanoparticles for skin penetration and distribution Xu, Meng Pu Kanyi School of Chemical and Biomedical Engineering DRNTU::Engineering::Bioengineering Using nanoparticulate systems for transdermal delivery has emerged as an increasingly important approach in targeted drug delivery. Such nanosystems are also expected to enhance transdermal transport of active molecules into and/or across the skin without causing any significant skin damage. However, the mechanism how the nanoengineering formulation assists the skin conveyance remains ambiguous. In this study, I report a onepot method to synthesize hydrophilic fluorescent PFODBT nanoparticles with high photostability, aqueous stability and cytocompatibility for ex vivo murine skin penetration. Confocal laser scanning microscopy and fluorescence microscopy were used for visualizing the penetration and distribution of the nanoparticles with diameters 30, 60 and 100 nm and different surface charges through the murine skin. The images reveal that this nanoparticulate system designed for ex vivo measurements preferentially accumulates in the follicles in a surface charge-dependent manner and this localization appears to have no exact relation to the particle size when size is smaller than 100 nm. Importantly, increased positive surface charges can noticeably improve the depth of penetration into the epidermis, down to the dermis and cannot be inhibited by the stratum corneum. Therefore, this study demonstrates a straightforward and advanced nanosystem to facilitate the permeation through the skin barrier and provide a promising application in cosmetics and topical drug delivery. ​Master of Science (Biomedical Engineering) 2017-06-16T03:41:13Z 2017-06-16T03:41:13Z 2017 Thesis http://hdl.handle.net/10356/72370 en 54 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Bioengineering
spellingShingle DRNTU::Engineering::Bioengineering
Xu, Meng
Fluorescent polymer nanoparticles for skin penetration and distribution
description Using nanoparticulate systems for transdermal delivery has emerged as an increasingly important approach in targeted drug delivery. Such nanosystems are also expected to enhance transdermal transport of active molecules into and/or across the skin without causing any significant skin damage. However, the mechanism how the nanoengineering formulation assists the skin conveyance remains ambiguous. In this study, I report a onepot method to synthesize hydrophilic fluorescent PFODBT nanoparticles with high photostability, aqueous stability and cytocompatibility for ex vivo murine skin penetration. Confocal laser scanning microscopy and fluorescence microscopy were used for visualizing the penetration and distribution of the nanoparticles with diameters 30, 60 and 100 nm and different surface charges through the murine skin. The images reveal that this nanoparticulate system designed for ex vivo measurements preferentially accumulates in the follicles in a surface charge-dependent manner and this localization appears to have no exact relation to the particle size when size is smaller than 100 nm. Importantly, increased positive surface charges can noticeably improve the depth of penetration into the epidermis, down to the dermis and cannot be inhibited by the stratum corneum. Therefore, this study demonstrates a straightforward and advanced nanosystem to facilitate the permeation through the skin barrier and provide a promising application in cosmetics and topical drug delivery.
author2 Pu Kanyi
author_facet Pu Kanyi
Xu, Meng
format Theses and Dissertations
author Xu, Meng
author_sort Xu, Meng
title Fluorescent polymer nanoparticles for skin penetration and distribution
title_short Fluorescent polymer nanoparticles for skin penetration and distribution
title_full Fluorescent polymer nanoparticles for skin penetration and distribution
title_fullStr Fluorescent polymer nanoparticles for skin penetration and distribution
title_full_unstemmed Fluorescent polymer nanoparticles for skin penetration and distribution
title_sort fluorescent polymer nanoparticles for skin penetration and distribution
publishDate 2017
url http://hdl.handle.net/10356/72370
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