A Magnetically-Triggered Composite Membrane for On-Demand Drug Delivery

TL;DR

This paper presents a magnetically-triggered nanocomposite membrane that enables controlled, on-demand drug release with demonstrated biocompatibility and repeatability over multiple cycles and long-term implantation.

Contribution

The study introduces a novel composite membrane combining thermosensitive nanogels and magnetite nanoparticles for precise magnetic field-controlled drug delivery.

Findings

Successful on-off drug release over multiple magnetic cycles

Drug dose proportional to 'on' pulse duration

Membranes remained biocompatible and functional after 45 days

Abstract

Nanocomposite membranes based on thermosensitive, poly(N-isopropylacrylamide)-based nanogels and magnetite nanoparticles have been designed to achieve "on-demand" drug delivery upon the application of an oscillating magnetic field. On-off release of sodium fluorescein over multiple magnetic cycles has been successfully demonstrated using prototype membrane-based devices. The total drug dose delivered was directly proportional to the duration of the "on" pulse. The membranes were non-cytotoxic, biocompatible, and retained their switchable flux properties after 45 days of subcutaneous implantation.