Controlled drug release under a low frequency magnetic field: effect of the citrate coating on magnetoliposomes stability
Journal article, 2011

The paper describes the effect of a low-frequency alternating magnetic field (LF-AMF) on the permeability and release properties of large (LUVs) and giant (GUVs) unilamellar vesicles loaded with citrate coated cobalt ferrite nanoparticles (NPs). The citrate shell allows a high loading of NPs in lipid vesicles without modifying their magnetic properties. The increase of magnetic LUVs permeability upon exposure to LF-AMF has been evaluated as the fluorescence self-quenching of carboxyfluorescein (CF) entrapped inside the liposome aqueous pool. Liposome leakage has been monitored as a function of field frequency, time exposure and concentration of the citrate coated NPs. Confocal Laser Scanning Microscopy (CLSM) experiments performed on magnetic GUVs labeled with the fluorescent probe DiIC18 and loaded with Alexa 488-C5-maleimide fluorescent dye provided insights on the release mechanism induced by LF-AMF. The results show that LF-AMF strongly affects vesicles permeability, suggesting the formation of pores in the lipid bilayer due to both hyperthermic effects and nanoparticle oscillations in the vesicles pool at the applied frequency. The behaviour of these magnetic vesicles in the presence of LF-AMF makes this system a good candidate for controlled drug delivery.

neutron-scattering

liposomes

modified superparamagnetic nanoparticles

intracellular uptake

fluid

cancer

glycol)

surelease

delivery systems

hpmc

Author

S. Nappini

CSGI

M. Bonini

CSGI

F. B. Bombelli

CSGI

F. Pineider

INSTM and Department of Chemistry U. Schiff

C. Sangregorio

Consiglo Nazionale Delle Richerche

P. Baglioni

CSGI

Bengt Nordén

Chalmers, Chemical and Biological Engineering, Physical Chemistry

Soft Matter

1744-683X (ISSN) 1744-6848 (eISSN)

Vol. 7 3 1025-1037

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Life Science Engineering (2010-2018)

Materials Science

Subject Categories

Physical Chemistry

DOI

10.1039/c0sm00789g

More information

Latest update

9/6/2018 1