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PEGylated Magnetic Nano-Assemblies as Contrast Agents for Effective T2-Weighted MR Imaging

 Byunghoon Kang  ;  Jaewoo Lim  ;  Hye-young Son  ;  Yuna Choi  ;  Taejoon Kang  ;  Juyeon Jung  ;  Yong-Min Huh  ;  Seungjoo Haam  ;  Eun-Kyung Lim 
 Nanomaterials, Vol.9(3) : E410, 2019 
Journal Title
Issue Date
Magnetic resonance image ; PEGylated ; Poly(ethylene glycol)-poly(lactic acid) ; contrast agent
We designed a high-sensitivity magnetic resonance imaging contrast agent that could be used to diagnose diseases. First, magnetic nanocrystals were synthesized by a thermal decomposition method on an organic solvent to obtain a high magnetism and methoxy poly(ethylene glycol)-poly(lactic acid) as an amphiphilic polymer using the ring-opening polymerization method to stably disperse the magnetic nanocrystals in an aqueous phase. Subsequently, the magnetic nanoclusters simultaneously self-assembled with methoxy poly(ethylene glycol)-poly(lactic acid) using the nano-emulsion method to form magnetic nanoclusters. Because their shape was similar to a raspberry, they were named PEGylated magnetic nano-assemblies. The PEGylated magnetic nano-assemblies were dispersed stably in the aqueous phase with a uniform size of approximately 65⁻70 nm for an extended period (0 days: 68.8 ± 5.1 nm, 33 days: 69.2 ± 2.0 nm, and 44 days: 63.2 ± 5.6). They exhibited both enough of a magnetic resonance (MR) contrast effect and biocompatibility. In an in vivo study, the PEGylated magnetic nano-assemblies provided a high contrast effect for magnetic resonance images for a long time after one treatment, thereby improving the diagnostic visibility of the disease site.
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1. College of Medicine (의과대학) > BioMedical Science Institute (의생명과학부) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Son, Hye Yeong(손혜영) ORCID logo https://orcid.org/0000-0001-5977-6784
Huh, Yong Min(허용민) ORCID logo https://orcid.org/0000-0002-9831-4475
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