Layer-by-layer assembled PEI-based vector with the upconversion luminescence marker for gene delivery

作者：Wang, Yaqiong; Cao, Ping; Li, Shicui; Zhang, Xiaofeng; Hu, Jin; Yang, Mingyue; Yao, Sujuan; Gao, Feng; Xia, Ao^*; Shen, Jian^*; Huang, Xiaohua

来源：Biochemical and Biophysical Research Communications, 2018, 503(4): 2504-2509.

DOI：10.1016/j.bbrc.2018.07.007

• Gene delivery
• Gene vector
• Layer-by-layer assembly
• Upconversion nanoparticles

The upconversion luminescence (UCL) marker based on upconversion nanoparticles (UCNPs) shows unique advantages over traditional fluorescence markers, such as enhanced tissue penetration, better photostability, and less autofluorescence. Herein, we constructed a new UCL gene-delivery nonviral vector via layer-by-layer self-assembly of polyethylene imine) (PEI) with UCNPs. To reduce the cytotoxicity of PEI, citric acid (CA) was introduced for aqueous modification, and PEI assembly was introduced on the UCNP surface. Our data show that the nonviral vector for UCL gene-delivery demonstrates excellent photostability, low toxicity, and good stability under physiological or serum conditions and can strongly bind to DNA. Moreover, this UCL PEI-based vector could serve as a promising fluorescent gene delivery carrier for theranostic applications.

• 出版日期2018-9-18
• 单位南京师范大学