Volume 55, Issue 2 pp. 719-723
Communication

Dual-Targeting Nanovesicles for In Situ Intracellular Imaging of and Discrimination between Wild-type and Mutant p53

Ruocan Qian

Ruocan Qian

Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237 (P.R. China)

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Yue Cao

Yue Cao

Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237 (P.R. China)

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Prof. Yi-Tao Long

Corresponding Author

Prof. Yi-Tao Long

Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237 (P.R. China)

Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237 (P.R. China)Search for more papers by this author
First published: 27 November 2015
Citations: 37

Graphical Abstract

Wild and mutant imaging: Dual-targeting nanovesicles based on consensus DNA-functionalized plasmonic gold nanoparticles (AuNPs) are designed and used for the simultaneous plasmonic imaging of wild-type p53 and fluorescence imaging of mutant p53.

Abstract

p53 is a tumor-suppressor protein related to the cell cycle and programmed cell apoptosis. Herein, dual-targeting nanovesicles are designed for in situ imaging of intracellular wild-type p53 (WTp53) and mutant p53 (MUp53). Nanovesicle-encapsulated plasmonic gold nanoparticles (AuNPs) were functionalized with consensus DNA duplexes, and a fluorescein isothiocyanate (FITC)-marked anti-MUp53 antibody was conjugated to the nanovesicle surface. After entering the cytoplasm, the released AuNPs aggregated through recognition of WTp53 and the double-stranded DNA. The color changes of AuNPs were observed using dark-field microscopy, which showed the intracellular WTp53 distribution. The MUp53 location was detected though the immunological recognition between FITC-labeled anti-MUp53 and MUp53. Thus, a one-step incubation method for the in situ imaging of intracellular WTp53 and MUp53 was obtained; this was used to monitor the p53 level under a drug treatment.

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