Beibei Wang1,2, Shujun Wang1,2, Yanfang Wang1,2, Yan Lv1,2, Hao Wu1,2, Xiaojun Ma1, Mingqian Tan3,4. 1. Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China. 2. University of the Chinese Academy of Sciences, Beijing, 100049, China. 3. Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China. mqtan@dicp.ac.cn. 4. Liaoning Key Laboratory of Food Biological Technology, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, 1 Qinggongyuan, Ganjingzi District, Dalian, 116034, China. mqtan@dicp.ac.cn.
Abstract
OBJECTIVES: To prepare fluorescent carbon dots for loading cationic anticancer drug through donor-quenched nanosurface energy transfer in visible sensing of drug release. RESULTS: Highly fluorescent carbon dots (CDs) were prepared by a facile hydrothermal approach from citric acid and o-phenylenediamine. The obtained CDs showed a high quantum yield of 46 % and exhibited good cytocompatibility even at 1 mg/ml. The cationic anticancer drug doxorubicin (DOX) can be loaded onto the negatively charged CDs through electrostatic interactions. Additionally, the fluorescent CDs feature reversible donor-quenched mode nanosurface energy transfer. When loading the energy receptor DOX, the donor CDs' fluorescence was switched "off", while it turned "on" again after DOX release from the surface through endocytic uptake. CONCLUSIONS: Most DOX molecules were released from the CDs after 6 h incubation and entered cell nuclear region after 8 h, suggesting the drug delivery system may have potential for visible sensing in drug release.
OBJECTIVES: To prepare fluorescent carbon dots for loading cationic anticancer drug through donor-quenched nanosurface energy transfer in visible sensing of drug release. RESULTS: Highly fluorescent carbon dots (CDs) were prepared by a facile hydrothermal approach from citric acid and o-phenylenediamine. The obtained CDs showed a high quantum yield of 46 % and exhibited good cytocompatibility even at 1 mg/ml. The cationic anticancer drug doxorubicin (DOX) can be loaded onto the negatively charged CDs through electrostatic interactions. Additionally, the fluorescent CDs feature reversible donor-quenched mode nanosurface energy transfer. When loading the energy receptor DOX, the donorCDs' fluorescence was switched "off", while it turned "on" again after DOX release from the surface through endocytic uptake. CONCLUSIONS: Most DOX molecules were released from the CDs after 6 h incubation and entered cell nuclear region after 8 h, suggesting the drug delivery system may have potential for visible sensing in drug release.
Entities:
Keywords:
Carbon dot; Doxorubicin; Drug delivery; Nanosurface energy transfer; Visible release