title: Magnetically triggered nanocomposite membranes: a versatile platform for triggered drug release.
abstract: Drug delivery devices based on nanocomposite membranes containing thermoresponsive nanogels and superparamagnetic nanoparticles have been demonstrated to provide reversible, on-off drug release upon application (and removal) of an oscillating magnetic field. We show that the dose of drug delivered across the membrane can be tuned by engineering the phase transition temperature of the nanogel, the loading density of nanogels in the membrane, and the membrane thickness, allowing for on-state delivery of model drugs over at least 2 orders of magnitude (0.1-10 μg/h). The zero-order kinetics of drug release across the membranes permit drug doses from a specific device to be tuned according to the duration of the magnetic field. Drugs over a broad range of molecular weights (500-40000 Da) can be delivered by the same membrane device. Membrane-to-membrane and cycle-to-cycle reproducibility is demonstrated, suggesting the general utility of these membranes for drug delivery.
authors.affiliation: Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada.
authors.forename: Todd
authors.initials: T
authors.lastname: Hoare
authors.forename: Brian P
authors.initials: BP
authors.lastname: Timko
authors.forename: Jesus
authors.initials: J
authors.lastname: Santamaria
authors.forename: Gerardo F
authors.initials: GF
authors.lastname: Goya
authors.forename: Silvia
authors.initials: S
authors.lastname: Irusta
authors.forename: Samantha
authors.initials: S
authors.lastname: Lau
authors.forename: Cristina F
authors.initials: CF
authors.lastname: Stefanescu
authors.forename: Debora
authors.initials: D
authors.lastname: Lin
authors.forename: Robert
authors.initials: R
authors.lastname: Langer
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Kohane
mesh_terms: D008280:Magnetics; D008567:Membranes, Artificial; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D004364:Pharmaceutical Preparations / Q000008:administration & dosage*; D010599:Pharmacokinetics
chemical_list: D008567:Membranes, Artificial; D004364:Pharmaceutical Preparations