Nanomesh drug delivery provides hope against global antibiotic resistance

Nanomesh drug delivery provides hope against global antibiotic resistance
Two antibiotics, Colistin and Vancomycin, were added together with gold nanoparticles to the mesh, before they were tested over a 14 day period by PHD student Melanie Fuller. Credit: Flinders University

The fight against global antibiotic resistance has taken a major step forward with scientists discovering a concept for fabricating nanomeshes as an effective drug delivery system for antibiotics.

Health experts are increasingly concerned about the rise in medication resistant bacteria. Now, Flinders University researchers and collaboraters in Japan have produced a nanomesh that is capable of delivering drug treatments.

In studying the effectiveness of the nanomesh, two , Colistin and Vancomycin, were added together with to the , before they were tested over a 14 day period by PHD student Melanie Fuller.

Flinders Institute for NanoScience and Technology Associate Professor Ingo Koeper says 20cm by 15cm pieces of mesh were produced which contain fibers 200 nm in diameter. These meshes are produced using a process called electrospinning with parameters being optimized to ensure the mesh material was consistent.

"In order to deliver the antibiotics to a specific area, the antibiotics were embedded into the mesh produced using a technique called electrospinning, which has gained considerable interest in the biomedical community as it offers promise in many applications including wound management, drug delivery and antibiotic coatings," says Assoc Prof. Koeper

"A is then applied between the needle connected to the syringe, and the collector plate which causes the polymer solution to form a cone as it leaves the syringe, at which point the electrostatic forces release a jet of liquid."

Nanomesh drug delivery provides hope against global antibiotic resistance
Process which achieved adding two antibiotics, Colistin and Vancomycin, were with gold nanoparticles to the mesh, before they were tested over a 14 day period. Credit: Flinders University

"Small charged altered the release of the antibiotics from the nanomesh. The addition of gold nanoparticles likely neutralized charge, causing the antibiotic to migrate toward the center of the fiber, prolonging its release."

The results also suggest dosages could be reduced when compared to traditional drugs which can also diminish potential side effects and complications.

"Although the dosage is reduced compared to an oral dosage, the concentration of antibiotics delivered to the infection site can still be higher, ensuring the bacteria cannot survive which will reduce instances of resistance."

"This research, as a proof of concept, suggests an opportunity for fabricating nanomeshes which contain gold nanoparticles as a treatment for antibiotics."

Working with Dr. Harriet Whiley, a Flinders environmental health scientists, the researchers studied how the release of the drugs affected the growth of E. Coli. The in vitro study confirmed Colistin with negatively charged gold nanoparticles produced the most efficient nanomesh, significantly affecting bacterial growth.

"Further investigation is needed to determine if other small charged particles affect the release of drugs and how it affects the release over time. As it is a pharmaceutical application, the stability of the mesh under different storage conditions as well as the toxicological properties also need to be evaluated."


Explore further

Better assessing bacteria sensitivity to antibiotics could change how drugs are prescribed

More information: Melanie A. Fuller et al. Nanoparticles in an antibiotic-loaded nanomesh for drug delivery, RSC Advances (2019). DOI: 10.1039/C9RA06398F
Citation: Nanomesh drug delivery provides hope against global antibiotic resistance (2019, October 16) retrieved 19 November 2019 from https://phys.org/news/2019-10-nanomesh-drug-delivery-global-antibiotic.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
122 shares

Feedback to editors

User comments