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

Research Paper

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

Juntao Tan1,*, Nuo Yang1,*, Liping Zhong1,*, 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 Huang1,✉, Sufang Zhou1,✉, Yongxiang Zhao1,✉

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.


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.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license ( See for full terms and conditions.
How to cite this article:
Tan J, Yang N, Zhong L, Tan J, Hu Z, Zhao Q, Gong W, Zhang Z, Zheng R, Lai Z, Li Y, Zhou C, Zhang G, Zheng D, Zhang Y, Wu S, Jiang X, Zhong J, Huang Y, Zhou S, Zhao Y. A New Theranostic System Based on Endoglin Aptamer Conjugated Fluorescent Silica Nanoparticles. Theranostics 2017; 7(19):4862-4876. doi:10.7150/thno.19101. Available from