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Li T, Sun M, Xia S, Huang T, Li RT, Li C, Dai Z, Chen JX, Chen J, Jia N. A binary system based DNA tetrahedron and fluorogenic RNA aptamers for highly specific and label-free mRNA imaging in living cells. Talanta 2024; 269:125465. [PMID: 38008022 DOI: 10.1016/j.talanta.2023.125465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/08/2023] [Accepted: 11/21/2023] [Indexed: 11/28/2023]
Abstract
Developing simple, rapid and specific mRNA imaging strategy plays an important role in the early diagnosis of cancer and the new drugs development. Herein, we have established a novel binary system based DNA tetrahedron and fluorogenic RNA aptamers for highly specific and label-free mRNA imaging in living cells. This developed system consisted of tetrahedron probe A (TPA) and tetrahedron probe B (TPB). TK1 mRNA was chosen as the study model. After TPA and TPB enter into the live cells, the TK1 mRNA induces TPA and TPB to approach and activate the fluorescent aptamer, resulting in enhanced fluorescent signal in the presence of small molecules of DFHBI-1T. By this design, the high specificity label-free detection of nucleic acids was achieved with a detection limit of 1.34 nM. Confocal fluorescence imaging experiments had proved that this strategy could effectively distinguish the TK1 mRNA expression level between normal cell and cancer cell. The developed method is expected to provide a new tool for early diagnosis of diseases and new drug development.
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Affiliation(s)
- Tong Li
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China
| | - Mengxu Sun
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China
| | - Suping Xia
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China
| | - Ting Huang
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China
| | - Rong-Tian Li
- Southern University of Science and Technology Hospital, Shenzhen, 518055, PR China
| | - Chunrong Li
- Qiannan Medical College for Nationalities, Duyun, 558000, PR China
| | - Zong Dai
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, Shenzhen, 518107, PR China
| | - Jin-Xiang Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China.
| | - Jun Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, PR China; Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Nuan Jia
- Southern University of Science and Technology Hospital, Shenzhen, 518055, PR China.
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Sensitive GlaI digestion and terminal transferase PCR for DNA methylation detection. Talanta 2022; 247:123616. [DOI: 10.1016/j.talanta.2022.123616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 11/30/2022]
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A novel methyl-dependent DNA endonuclease GlaI coupling with double cascaded strand displacement amplification and CRISPR/Cas12a for ultra-sensitive detection of DNA methylation. Anal Chim Acta 2022; 1212:339914. [DOI: 10.1016/j.aca.2022.339914] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 12/26/2022]
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