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美國布魯克海文儀器公司>技術(shù)文章>T1-Weighted MR/CT dual-modality imaging-guided photothermal therapy using gadolinium-functionalized

技術(shù)文章

T1-Weighted MR/CT dual-modality imaging-guided photothermal therapy using gadolinium-functionalized

閱讀:582          發(fā)布時間:2017-10-20
 作者 Wenfei Liua, Kai Liub, Ying Zhaoa, Shuang Zhaoa, Song Luoa, Ying Tiana, Zhaogang Teng*a, Shouju Wang*a and Guangming Lu*a

aDepartment of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China.

bNanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, P. R. China

 

摘要:Multifunctional nanoagents, in particular those that combine diverse diagnostic and therapeutic functions, have attracted great enthusiasm in oncotherapy. In this work, a triangular gold nanoprism decorated with gadopentetic acid (Gd–DTPA) (TGP–PEG–Gd) was constructed for use in cancer theranostics. TGP–PEG–Gd exhibits uniform morphology, excellent monodispersity and near infrared absorbance properties. The magnetic properties of gadolinium, together with the X-ray attenuation of gold, enable TGP–PEG–Gd to be employed for T1-weighted MR/CT dual-modality imaging. The longitudinal relaxivity (r1) of TGP–PEG–Gd was calculated to be 23.1 mM−1 s−1, and its X-ray absorption coefficient was 959.3 HU L g−1. In addition, TGP–PEG–Gd possesses effective photothermal conversion ability, which was utilized for successful photothermal therapy. Moreover, the excellent biocompatibility of TGP–PEG–Gd was proved both in vitro and in vivo. Biocompatible TGP–PEG–Gd may hold promise for the photothermal therapy of cancers guided by MR/CT dual-modality imaging.

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