TY  - JOUR
N1  - © 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. This manuscript version is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at https://creativecommons.org/licenses/. Access may be initially restricted by the publisher.
TI  - Nanosized sustained-release drug depots fabricated using modified tri-axial electrospinning
EP  - 241
AV  - public
SP  - 233
VL  - 53
Y1  - 2017/01/27/
JF  - Acta Biomaterialia
KW  - Nanoscale drug depot; sustained release; cellulose acetate; tri-axial electrospinning; core-shell nanostructure
A1  - Yang, G-Z
A1  - Li, J-J
A1  - Yu, D-G
A1  - He, M-F
A1  - Yang, J-H
A1  - Williams, GR
ID  - discovery1538771
N2  - Nanoscale drug depots, comprising a drug reservoir surrounded by a carrier membrane, are much sought after in contemporary pharmaceutical research. Using cellulose acetate (CA) as a filament-forming polymeric matrix and ferulic acid (FA) as a model drug, nanoscale drug depots in the form of core-shell fibers were designed and fabricated using a modified tri-axial electrospinning process. This employed a solvent mixture as the outer working fluid, as a result of which a robust and continuous preparation process could be achieved. The fiber-based depots had a linear morphology, smooth surfaces, and an average diameter of 0.62 ± 0.07 ?m. Electron microscopy data showed them to have clear core-shell structures, with the FA encapsulated inside a CA shell. X-ray diffraction and IR spectroscopy results verified that FA was present in the crystalline physical form. In vitro dissolution tests revealed that the fibers were able to provide close to zero-order release over 36 h, with no initial burst release and minimal tailing-off. The release properties of the depot systems were much improved over monolithic CA/FA fibers, which exhibited a significant burst release and also considerable tailing-off at the end of the release experiment. Here we thus demonstrate the concept of using modified tri-axial electrospinning to design and develop new types of heterogeneous nanoscale biomaterials.
SN  - 1742-7061
UR  - http://doi.org/10.1016/j.actbio.2017.01.069
ER  -