Drug-Loaded Nanofibers: Controlled and Sustained Release

A special issue of Pharmaceutics (ISSN 1999-4923).

Deadline for manuscript submissions: closed (6 December 2019) | Viewed by 4495

Special Issue Editor


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Guest Editor
Mechanical Engineering, Chang Gung University Adjunct Professor, Orthopedic Surgery, Chang Gung Memorial Hospital Tao-Yuan, Taoyuan 33302, Taiwan
Interests: bioabsorbable medical devices; drug delivery; tissue engineering; nanofibers; core-shell microspheres
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Dear Colleagues,

Nanofibers from a rich variety of materials including polymers, composites, and ceramics can be easily prepared using simple methods such as electrospinning. Drug-loaded nanofibers have attracted a great deal of attention over the past two decades due to their unique characteristics, and are exploited as promising materials for a wide range of drug delivery applications. Furthermore, drug-loaded nanofibers provide various advantages including: 1) due to the high surface area to volume ratio, polymer nanofibers provide a useful pathway for the delivery of water insoluble drugs; 2) the drug release profile can be easily fine-tailored by modulation not only of the composition of the nanofiber mats but also the morphology of nanofibers, the process and the micro-structure; 3) there is a lot of flexibility in the use of nanofibers in designing various dosage forms to achieve the maximum bioavailability of a drug moiety for different drug delivery routes; 4) nanofibers often possess a higher drug encapsulation efficiency than other nanotechnologies; 5) drug-loaded nanofibers not only have one dimension at the microscopic scale but another dimension in the macroscopic form, thus offering the advantages of conventional solid dosage forms such as easy processing, good drug stability, and ease of packaging and shipping.

This Special Issue of Pharmaceutics will attempt to cover the recent advancements in the fabrications and applications of these drug-loaded nanofibers.

Prof. Dr. Shih-Jung (Sean) Liu
Guest Editor

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Keywords

  • nanofibers
  • drug delivery
  • release characteristics
  • fabrication
  • applications

Published Papers (1 paper)

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11 pages, 19936 KiB  
Article
Doxycycline-Eluting Core-Shell Type Nanofiber-Covered Trachea Stent for Inhibition of Cellular Metalloproteinase and Its Related Fibrotic Stenosis
by Rengarajan Baskaran, Un-Jeong Ko, Enkhzaya Davaa, Ji Eun Park, Yixin Jiang, Junghan Lee and Su-Geun Yang
Pharmaceutics 2019, 11(8), 421; https://doi.org/10.3390/pharmaceutics11080421 - 19 Aug 2019
Cited by 5 | Viewed by 4079
Abstract
In this study, we fabricated a doxycycline (doxy)-eluting nanofiber-covered endotracheal stent for the prevention of stent intubation-related tissue fibrosis and re-stenosis. The nanofiber was deposited directly on the outer surface of the stent using a coaxial electrospinning method to form a doxy-eluting cover [...] Read more.
In this study, we fabricated a doxycycline (doxy)-eluting nanofiber-covered endotracheal stent for the prevention of stent intubation-related tissue fibrosis and re-stenosis. The nanofiber was deposited directly on the outer surface of the stent using a coaxial electrospinning method to form a doxy-eluting cover sleeve. Poly(d,l-lactide) was used as the shell-forming polymer and dedicated drug release-control membrane. Polyurethane was selected as the drug-loading core polymer. The compositional ratio of the core to shell was adjusted to 1:0, 1:2, and 1:4 by changing the electro-spray rate of each polymeric solution and microscopic observation of nanofibers using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the fluorescence microscopy proved core-shell structure of nanofibers. The in vitro release study suggested that the release of doxy could be controlled by increasing the compositional ratio of the shell. The growth of HT1080 fibrosarcoma cells was inhibited by the 10% doxy-containing nanofiber. The real-time polymerase chain reaction (PCR) in HT1080 cells and xenografted tissue models indicated that the doxy-releasing nanofiber inhibited mRNA expression of metalloproteinases (MT1-MMP, MMP-2, and MMP-9). Overall, our study demonstrates that a doxy-eluting core-shell nanofiber stent can be successfully fabricated using coaxial electrospinning and displays the potential to prevent fibrotic re-stenosis, which is the most problematic clinical complication of tracheal stent intubation. Full article
(This article belongs to the Special Issue Drug-Loaded Nanofibers: Controlled and Sustained Release)
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