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Ding H, Zhang M, Wang X, He S, Wang X, Chen L. Colorimetric and fluorescent independent dual "signal on" biosensor for accurate detection of ochratoxin A based on aptamer-triggered biocatalytic reactions. Anal Chim Acta 2024; 1299:342440. [PMID: 38499428 DOI: 10.1016/j.aca.2024.342440] [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: 12/25/2023] [Revised: 02/26/2024] [Accepted: 02/29/2024] [Indexed: 03/20/2024]
Abstract
Ochratoxin A (OTA) is a hazardous food contaminant with significant health risks. Dual-channel OTA detection is noted for its cross-reference capability and high accuracy. Still, challenges in addressing in-system corrections and "signal off" related false positives and limited signal gains remain. Herein, we developed a dual-channel "signal on" aptasensor with one recognition process and two independent signal outputs for OTA analysis. The OTA aptamer binds to magnetic beads (MBs) and partially hybridizes with a complementary-trigger (cDNA-Trigger) sequence. Adding OTA disrupts the duplex sequence, leading to G-quadruplex (G4) formation and enrichment on the MBs, which then interacts with hemin to catalyze a color signal. Concurrently, the freed cDNA-Trigger catalyzes an enzyme-free DNA circuit, producing a fluorescence signal. The magnetic enrichment and signal amplification strategies make the proposed assay demonstrate excellent sensitivity toward OTA, with limits of detection (LOD) of 0.017 pM in the fluorescence channel and 48.1 pM in the colorimetric channel. Both channels have effectively detected OTA in grape juice and baijiu, demonstrating their applicability and reliability. Moreover, given the widespread use of smartphones globally, a mini-program with a self-correction function was designed to facilitate on-site colorimetric channel monitoring, making OTA detection more accessible and user-friendly.
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Affiliation(s)
- Hao Ding
- Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Mingdi Zhang
- Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Xiaochun Wang
- Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Shuai He
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, 2052, Australia
| | - Xiaokun Wang
- Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; School of Pharmacy, Binzhou Medical University, Yantai, 264003, China; College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
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Dai D, Zhang Y, Yang S, Kong W, Yang J, Zhang J. Recent Advances in Functional Materials for Optical Data Storage. Molecules 2024; 29:254. [PMID: 38202837 PMCID: PMC10780730 DOI: 10.3390/molecules29010254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/26/2023] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
In the current data age, the fundamental research related to optical applications has been rapidly developed. Countless new-born materials equipped with distinct optical properties have been widely explored, exhibiting tremendous values in practical applications. The optical data storage technique is one of the most significant topics of the optical applications, which is considered as the prominent solution for conquering the challenge of the explosive increase in mass data, to achieve the long-life, low-energy, and super high-capacity data storage. On this basis, our review outlines the representative reports for mainly introducing the functional systems based on the newly established materials applied in the optical storage field. According to the material categories, the representative functional systems are divided into rare-earth doped nanoparticles, graphene, and diarylethene. In terms of the difference of structural features and delicate properties among the three materials, the application in optical storage is comprehensively illustrated in the review. Meanwhile, the potential opportunities and critical challenges of optical storage are also discussed in detail.
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Affiliation(s)
- Dihua Dai
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Yong Zhang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Siwen Yang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Weicheng Kong
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
| | - Jie Yang
- School of Life Sciences, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jijun Zhang
- China Hualu Group Co., Ltd., 717 Huangpu Road, Dalian 116023, China; (D.D.); (Y.Z.); (S.Y.); (W.K.)
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