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Wang Q, Liu J, Zeng J, Yang Z, Ran F, Wu L, Yang G, Mei Q, Wang X, Chen Q. Determination of miRNA derived from exosomes of prostate cancer via toehold-aided cyclic amplification combined with HRP enzyme catalysis and magnetic nanoparticles. Anal Biochem 2021; 630:114336. [PMID: 34400146 DOI: 10.1016/j.ab.2021.114336] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/03/2021] [Accepted: 08/10/2021] [Indexed: 01/08/2023]
Abstract
MicroRNAs (miRNAs) play a significant role in tumorigenesis and tumor development. Exosomal microRNA-141 (miRNA-141, miR-141) has been reported to be overexpressed in prostate cancer (PCa) and has become a potential biomarker for the diagnosis of PCa. Herein, a novel fluorescent biosensor based on toehold-aided cyclic amplification combined with horseradish peroxidase (HRP) enzyme catalysis and magnetic nanoparticles (MNPs) was designed for determination of the exosomes-derived microRNA-141 (miRNA-141, miR-141). The synergy of HRP enzyme catalysis and toehold mediated strand display reaction (TSDR) increase the sensitivity of the method, and the good separation ability of MNPs ensures the specificity of the method. Therefore, under the optimized experimental conditions, the highly sensitive and specific detection of miRNA-141 can be realized, and the detection limit is as low as 10 fM. More importantly, the biosensor successfully determinates the exosomal miR-141 in the plasma of patients with PCa.
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Affiliation(s)
- Qinjun Wang
- Department of Urology, Shenzhen Longhua District Central Hospital, Shenzhen, 518110, China
| | - Jingjian Liu
- Sinopharm Dongfeng General Hospital, Hubei University of Medicine, Shiyan, 442008, China
| | - Jiantao Zeng
- Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, 518101, China
| | - Zhiming Yang
- Shenzhen Baoan Authentic TCM Therapy Hospital, Shenzhen, 518101, China
| | - Fengying Ran
- Sinopharm Dongfeng General Hospital, Hubei University of Medicine, Shiyan, 442008, China
| | - Lun Wu
- Sinopharm Dongfeng General Hospital, Hubei University of Medicine, Shiyan, 442008, China
| | - Guangyi Yang
- Shenzhen Baoan Authentic TCM Therapy Hospital, Shenzhen, 518101, China
| | - Quanxi Mei
- Shenzhen Baoan Authentic TCM Therapy Hospital, Shenzhen, 518101, China
| | - Xisheng Wang
- Department of Urology, Shenzhen Longhua District Central Hospital, Shenzhen, 518110, China.
| | - Qinhua Chen
- Shenzhen Baoan Authentic TCM Therapy Hospital, Shenzhen, 518101, China.
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