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  Characterization of magnetic nanoparticles from Magnetospirillum Gryphiswaldense as potential theranostics tools.

Orlando, T., Mannucci, S., Fantechi, E., Conti, G., Tambalo, S., Busato, A., et al. (2016). Characterization of magnetic nanoparticles from Magnetospirillum Gryphiswaldense as potential theranostics tools. Contrast Media and Molecular Imaging, 11(2), 139-145. doi:10.1002/cmmi.1673.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-5336-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-0954-3
Genre: Journal Article

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2281448.pdf (Publisher version), 310KB
 
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 Creators:
Orlando, T.1, Author              
Mannucci, S., Author
Fantechi, E., Author
Conti, G., Author
Tambalo, S., Author
Busato, A., Author
Innocenti, C., Author
Ghin, L., Author
Bassi, R., Author
Arosio, P., Author
Orsini, F., Author
Sangregorio, C., Author
Corti, M., Author
Casula, M. F., Author
Marzola, P., Author
Lascialfari, A., Author
Sbarbati, A., Author
Affiliations:
1Research Group of Electron Paramagnetic Resonance, MPI for Biophysical Chemistry, Max Planck Society, ou_578606              

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Free keywords: magnetosomes; relaxometry; contrast agent; MRI; hyperthermia; theranostics
 Abstract: We investigated the theranostic properties of magnetosomes (MNs) extracted from magnetotactic bacteria, promising for nanomedicine applications. Besides a physico-chemical characterization, their potentiality as mediators for magnetic fluid hyperthermia and contrast agents for magnetic resonance imaging, both in vitro and in vivo, are here singled out. The MNs, constituted by magnetite nanocrystals arranged in chains, show a superparamagnetic behaviour and a clear evidence of Verwey transition, as signature of magnetite presence. The phospholipid membrane provides a good protection against oxidation and the MNs oxidation state is stable over months. Using an alternate magnetic field, the specific absorption rate was measured, resulting among the highest reported in literature. The MRI contrast efficiency was evaluated by means of the acquisition of complete NMRD profiles. The transverse relaxivity resulted as high as the one of a former commercial contrast agent. The MNs were inoculated into an animal model of tumour and their presence was detected by magnetic resonance images two weeks after the injection in the tumour mass.

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Language(s): eng - English
 Dates: 2015-11-242016-04
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1002/cmmi.1673
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Title: Contrast Media and Molecular Imaging
Source Genre: Journal
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Pages: - Volume / Issue: 11 (2) Sequence Number: - Start / End Page: 139 - 145 Identifier: -