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Theranostics 2017; 7(19):4862-4876. doi:10.7150/thno.19101 This issue Cite

Research Paper

A New Theranostic System Based on Endoglin Aptamer Conjugated Fluorescent Silica Nanoparticles

Juntao Tan^1,*, Nuo Yang^1,*, Liping Zhong^1,*, Jie Tan¹, Zixi Hu¹, Qing Zhao², Wenlin Gong¹, Zhenghua Zhang¹, Rong Zheng¹, Zongqiang Lai¹, Yanmei Li¹, Chaofan Zhou¹, Guoqing Zhang¹, Duo Zheng³, Ying Zhang¹, Siyu Wu¹, Xinglu Jiang¹, Jianhong Zhong⁴, Yong Huang^1,✉, Sufang Zhou^1,✉, Yongxiang Zhao^1,✉

1. National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021, China
2. Department of Theracic Surgery, Zhongshan Hospital, Xiamen University, Xiamen, Fujian 361004, China
3. Shenzhen Key Laboratory of Translational Medicine of Tumor, Department of Basic Medicine, School of Medicine, Shenzhen University, Shenzhen, Guangdong 518000, China
4. Department of Surgery Oncology, The Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi 530021, China
* These authors contributed equally to this work.

✉ Corresponding authors: Yongxiang Zhao, M.D., Ph.D., Professor, National Center for International Research of Biological Targeting Diagnosis and Therapy / Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research / Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021, China. Tel: (86) 771-5317 061; Fax: (86) 771-5317 061, E-mail: yongxiang_zhaocom; Sufang Zhou, Ph.D., Professor, National Center for International Research of Biological Targeting Diagnosis and Therapy / Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research / Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021, China. Tel: (86) 771-5317 061; Fax: (86) 771-5317 061, Email: zsf200000com and Yong Huang, Ph.D., Professor, National Center for International Research of Biological Targeting Diagnosis and Therapy / Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research / Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021, China. Tel: (86) 771-5317 061; Fax: (86) 771-5317 061, Email: huangyong503com More

Abstract

Background: Tumor vessels can potentially serve as diagnostic, prognostic and therapeutic targets for solid tumors. Fluorescent dyes are commonly used as biological indicators, while photobleaching seriously hinders their application. In this study, we aim to generate a fluorescent silica nanoparticles (FSiNPs) theranostic system marked by the mouse endgolin (mEND) aptamer, YQ26.

Methods: A highly specific YQ26 was selected by using gene-modified cell line-based SELEX technique. FSiNPs were prepared via the reverse microemulsion method. The YQ26-FSiNPs theranostic system was developed by combining YQ26 with the FSiNPs for in vivo tumor imaging, treatment and monitoring.

Results: Both in vitro experiments (i.e. cellular and tumor tissue targeting assays) and in vivo animal studies (i.e. in vivo imaging and antitumor efficacy of YQ26-FSiNPs) clearly demonstrated that YQ26-FSiNPs could achieve prominently high targeting efficiency and therapeutic effects via aptamer YQ26-mediated binding to endoglin (END) molecule.

Conclusion: This simple, sensitive, and specific YQ26-FSiNPs theranostic system has a great potential for clinical tumor targeting imaging and treatment.

Keywords: Endoglin, tumor neovasculature, aptamer, fluorescent silica nanoparticles.

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