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Wang J, Fu J, Chen H, Wang A, Ma Y, Yan H, Li Y, Yu D, Gao F, Li S. Trimer structures formed by target-triggered AuNPs self-assembly inducing electromagnetic hot spots for SERS-fluorescence dual-signal detection of intracellular miRNAs. Biosens Bioelectron 2023; 224:115051. [PMID: 36621084 DOI: 10.1016/j.bios.2022.115051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/10/2022] [Accepted: 12/28/2022] [Indexed: 01/05/2023]
Abstract
Accurate quantitative, in situ and temporal tracking imaging of tumor-associated miRNAs in living cells could provide a basis for cancer diagnosis and prognosis. In this strategy, a surface-enhanced Raman scattering (SERS)-fluorescence (FL) dual-spectral sensor (DSS) was constructed based on the nanoscale photophysical properties of AuNPs, mediated by functionalized DNA, to achieve rapid imaging of FL and accurate SERS quantification of intracellular miRNAs. The dual-spectrum sensor in the strategy is highly sensitive, specific and reproducibly stable. The LOD values of the dual spectra were 3.58 pM (SERS) as well as 11.8 pM (FL) with RSD values less than 2.69%. The bispectral sensor self-assembled into a trimer by the lapidation of Y-type DNA under the excitation of the target, generating a stable enhanced electric field coupling; and selected adenine located in the enhanced electric field as the reporter molecule, simplifying the labeling process and variables of the Raman reporter molecule, distinguishing it from other traditional methods. This strategy successfully achieved accurate tracking and quantification of miR-21 in cancer cells and showed good stability in the cells. The reported probes are potential tools for reliable monitoring of biomolecular dynamics in living cells.
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Affiliation(s)
- Jiwei Wang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China; Department of Blood Transfusion, Xuzhou Central Hospital, Jiangsu, 221004, Xuzhou, China
| | - Jingjing Fu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China; Jiangsu Provincial Xuzhou Pharmaceutical Vocational College, Jiangsu, 221116, Xuzhou, China
| | - Han Chen
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China; Department of Orthopedics, Affiliated Hospital of Xuzhou Medical University, Jiangsu, Xuzhou, 221004, China
| | - Ali Wang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China
| | - Yuting Ma
- Department of Blood Transfusion, Xuzhou Central Hospital, Jiangsu, 221004, Xuzhou, China
| | - Hanrong Yan
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China
| | - Yuting Li
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China
| | - Dehong Yu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China; The Affiliated Pizhou Hospital of Xuzhou Medical University, Xuzhou, 221399, China
| | - Fenglei Gao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China.
| | - Shibao Li
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Jiangsu, 221004, Xuzhou, China; Medical Laboratory Department, The Affiliated Hospital of Xuzhou Medical University, Jiangsu, 221002, Xuzhou, China.
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