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Issue 23, 2013
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Continuously manufactured magnetic polymersomes – a versatile tool (not only) for targeted cancer therapy

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Abstract

Micromixer technology was used to prepare polymeric vesicles (Pluronic® L-121) dual loaded with the anti-cancer drug camptothecin and magnetic nanoparticles. Successful incorporation of the magnetic nanoparticles was confirmed by transmission electron microscopy. Dynamic light scattering measurements showed a relatively narrow size distribution of the hybrid polymersomes. Camptothecin polymersomes reduced the cell viability of prostate cancer cells (PC-3) measured after 72 h significantly, while drug-free polymersomes showed no cytotoxic effects. Covalent attachment of a cancer targeting peptide (bombesin) as well as a fluorescent label (Alexa Fluor® 647) to the hybrid polymersomes was performed and specific cell binding and internalization were shown by flow cytometry and confocal microscopy. Relaxometry measurements clearly demonstrated the capacity of magnetic polymersomes to generate significant T2-weighted MRI contrast and potentially allow for direct monitoring of the biodistribution of the polymersomes. Micromixer technology as an easy, fast and efficient way to manufacture hybrid polymersomes as theranostic drug delivery devices is a further step from basic research to personalized medicine.

Graphical abstract: Continuously manufactured magnetic polymersomes – a versatile tool (not only) for targeted cancer therapy

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Article information


Submitted
30 Apr 2013
Accepted
18 Jun 2013
First published
19 Jun 2013

Nanoscale, 2013,5, 11385-11393
Article type
Paper

Continuously manufactured magnetic polymersomes – a versatile tool (not only) for targeted cancer therapy

R. Bleul, R. Thiermann, G. U. Marten, M. J. House, T. G. St. Pierre, U. O. Häfeli and M. Maskos, Nanoscale, 2013, 5, 11385
DOI: 10.1039/C3NR02190D

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