Au nanoshell-coated superparamagnetic Fe3O4-silica composite nanoparticles with surface-modification of an activatable cell-penetrating peptide for tumor-targeted multimode bioimaging and photothermal therapy

作者：Jiang, Yunfang; Zhang, Qianyu; Liu, Xinghua; Chen, Yifu; Wang, Li; Fu, Jingwei; Duan, Hongquan; Wang, Yinsong; Yang, Xiaoying^*

来源：RSC Advances, 2016, 6(88): 85587-85594.

DOI：10.1039/c6ra07708k

• FACILE SYNTHESIS
• SHELLS
• AGENT

High-resolution imaging of molecules intrinsically involved in malignancy and metastasis would be of great value for clinical detection and staging of tumors. Based on the selective cell-penetrating ability in the tumor sites of the activatable cell-penetrating peptide (ACPP), the superparamagnetic Fe3O4-silica composite nanoparticles (SSCNs) coated with Au nanoshells (AuNSs) were prepared and subsequently surface-modified with polyethylene glycol (PEG) conjugated an ACPP to form SSCNs@AuNSs-PEG-ACPP nanoparticles for realizing tumor site-specific multimode bioimaging and photothermal therapy. SSCNs@AuNSs-PEG-ACPP nanoparticles showed high photothermal efficiency, X-ray attenuation property and T-2 relaxation rate, which were confirmed by a series of characterizations in vitro and in vivo. The enhanced accumulation of SSCNs@AuNSs-PEG-ACPP nanoparticles in the tumor was investigated by the in vivo X-ray computed tomography (CT) imaging and magnetic resonance (MR) imaging. SSCNs@AuNSs-PEG-ACPP nanoparticles will be likely to realize simultaneous CT/MR bioimaging and photothermal therapy on the tumor by the combination of superparamagnetization, X-ray attenuation property, near-infrared (NIR) absorption and tumor-selected accumulation.

• 出版日期2016
• 单位天津医科大学; 天津大学