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Song L, Han Z, Lau WM. Optimization of mid-infrared noninvasive blood-glucose prediction model by support vector regression coupled with different spectral features. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124738. [PMID: 38945006 DOI: 10.1016/j.saa.2024.124738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 06/12/2024] [Accepted: 06/26/2024] [Indexed: 07/02/2024]
Abstract
Mid-infrared spectral analysis of glucose in subcutaneous interstitial fluid has been widely employed as a noninvasive alternative to the standard blood-glucose detection requiring blood-sampling via skin-puncturing, but improving the confidence level of such a replacement remains highly desirable. Here, we show that with an innovative metric of attributes in measurements and data-management, a high accuracy in correlating the test results of our improved spectral analysis to those of the standard detection is accomplished. First, our comparative laser speckle contrast imaging of subcutaneous interstitial fluid in fingertips, thenar and hypothenar reveal that spectral measurements from hypothenar, with an attenuated total reflection Fourier transform infrared spectrometer, give much stronger signals than the stereotype measurements from fingertips. Second, we demonstrate that discriminative selection of the spectral locations and ranges, to minimize spectral interference and maximize signal-to-noise, are critically important. The optimal band is pinned at that between 1000 ± 3 cm-1 and1040 ± 3 cm-1. Third, we propose an individual exclusive prediction model by adopting the support vector regression analysis of the spectral data from four subjects. The average predicted coefficient of determination, root mean square error and mean absolute error of four subjects are 0.97, 0.21 mmol/L, 0.17 mmol/L, respectively, and the average probability of being in Zone A of the Clark error grid is 100.00 %. Additionally, we demonstrate with the Bland and Altman plot that our proposed model has the highest consistency with portable blood glucose meter detection method.
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Affiliation(s)
- Liying Song
- Beijing Advanced Innovation Center for Materials Genome Engineering, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China; Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong 528399, China
| | - Zhiqiang Han
- Beijing Advanced Innovation Center for Materials Genome Engineering, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China; Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong 528399, China
| | - Woon-Ming Lau
- Beijing Advanced Innovation Center for Materials Genome Engineering, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China; Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong 528399, China; School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276000, China.
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Lu H, Wang X. Dual-mode detection of glucose based on pistol-like DNAzyme-mediated exonuclease-assisted signal cycle. Biotechniques 2024:1-9. [PMID: 39101584 DOI: 10.1080/07366205.2024.2381403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 07/09/2024] [Indexed: 08/06/2024] Open
Abstract
Detecting glucose accurately and sensitively from clinical samples like tears and saliva is still difficult. We have created a sensor that can detect glucose with high sensitivity and accuracy by combining the use of glucose oxidase (GOx) to catalyze glucose, a pistol-like DNAzyme (PLDz) to transform the signal, gold nanoparticles (AuNPs) to enhance the optical properties and the exonuclease-III (Exo-III) to amplify the signal. As a result, the proposed method exhibits a low detection limit of 7.5 pM and a wide detection range covering seven orders of magnitude. The suggested dual-mode strategy provides a sensitive, precise and specific detection method for glucose. Another advantage is that the dual-mode technique significantly improves the precision and consistency of the measurements, demonstrating its immense potential for use in biomedical research and clinical diagnostics.
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Affiliation(s)
- Huiying Lu
- Northwest Women's & Children's Hospital, Obstetrics & Gynecology Department, Xi'an City, Shaanxi Province, 710000, China
| | - Xiaofeng Wang
- Northwest Women's & Children's Hospital, Obstetrics & Gynecology Department, Xi'an City, Shaanxi Province, 710000, China
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Gao J, Wang D, Chen Y, Urujeni GI, Tang X, Lu Z, Wang Y, He H, Xiao D, Dramou P. Portable paper-based probe for on-site ratiometric fluorescence determination of total flavonol glycosides in plant extract using smartphone imaging. Mikrochim Acta 2024; 191:70. [PMID: 38165510 DOI: 10.1007/s00604-023-06166-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
A smartphone-assisted, paper-based ratio fluorescence probe is presented for the rapid, low-cost and on-site quantification of total flavonol glycosides in Ginkgo biloba extracts (GBE). The Al3+/Eu-MOF/paper-based probe utilizes lanthanide metal-organic framework (Ln-MOF) nanoparticles immobilized on Whatman filter paper along with Al3+ for detecting flavonols, which are the hydrolyzed products of flavonol glycosides. The color change of the paper-based fluorescence image from red to orange depends on the concentration of the target analyte in the sample solution. The smartphone equipped with a red, green, blue (RGB) color detector measured the fluorescence signal intensity on the paper substrate after adding flavonol. The analytical variables affecting the performance of the probe, including the addition sequence of the aluminum nitrate solution, its concentration, that of the Ln-MOF solution, the drying time of the paper probe, the reaction time and the sensitivity parameters of the mobile phone camera (ISO), were optimized. Under optimal conditions, the Al3+/Eu-MOF/paper-based probe has good linear response in the concentration range 7 ~ 80 µg mL- 1 and a lower detection limit of 2.07 µg mL- 1. The results obtained with the paper-based ratio fluorescence probe and smartphone combination were validated by comparing them with high-performance liquid chromatography (HPLC) measurements. This study provides a potential strategy for fabricating Al3+/Eu-MOF/paper-based probe used for total flavonol glycosides determination.
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Affiliation(s)
- Jie Gao
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Dan Wang
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Yue Chen
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Gisèle Ineza Urujeni
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Xue Tang
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Ziwei Lu
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Yaoyao Wang
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
| | - Hua He
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, 210009, China
- Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing, 211198, China
| | - Deli Xiao
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China.
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, 210009, China.
- Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing, 211198, China.
| | - Pierre Dramou
- Department of Analytical Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu Province, 211198, China.
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, 210009, China.
- Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing, 211198, China.
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Xu J, Liu Z, Zhang Z, Wu T. Unlocking the Full Potential of Cas12a: Exploring the Effects of Substrate and Reaction Conditions on Trans-Cleavage Activity. Anal Chem 2023. [PMID: 37392174 DOI: 10.1021/acs.analchem.3c01307] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
The trans-cleavage activity of Cas12a has been widely used with various applications. Here, we report that the trans-cleavage activity of Cas12a can be significantly affected by the fluorescent probe length and reaction buffer. The optimal probe length for Cas12a is found to be 15 nucleotides, and the optimal buffer is NEBuffer 4. Compared to the popularly used reaction conditions, the activity of Cas12a is improved by about 50-fold. In addition, the detection limit of Cas12a for DNA targets has been reduced by nearly three orders of magnitude. Our method provides a powerful tool for Cas12a trans-cleavage activity applications.
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Affiliation(s)
- Jie Xu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhujun Liu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhen Zhang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Tongbo Wu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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Liu FX, Cui JQ, Wu Z, Yao S. Recent progress in nucleic acid detection with CRISPR. LAB ON A CHIP 2023; 23:1467-1492. [PMID: 36723235 DOI: 10.1039/d2lc00928e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Recent advances in CRISPR-based biotechnologies have greatly expanded our capabilities to repurpose CRISPR for the development of molecular diagnostic systems. The key attribute that allows CRISPR to be widely utilized is its programmable and highly specific nature. In this review, we first illustrate the principle of the class 2 CRISPR nucleases for molecular diagnostics which originates from their immunologic defence systems. Next, we present the CRISPR-based schemes in the application of diagnostics with amplification-assisted or amplification-free strategies. By highlighting some of the recent advances we interpret how general bioengineering methodologies can be integrated with CRISPR. Finally, we discuss the challenges and exciting prospects for future CRISPR-based biosensing development. We hope that this review will guide the reader to systematically learn the start-of-the-art development of CRISPR-mediated nucleic acid detection and understand how to apply the CRISPR nucleases with different design concepts to more general applications in diagnostics and beyond.
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Affiliation(s)
- Frank X Liu
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | - Johnson Q Cui
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | - Zhihao Wu
- IIP-Advanced Materials, Interdisciplinary Program Office (IPO), Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Shuhuai Yao
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
- Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Cheng X, Li Y, Kou J, Liao D, Zhang W, Yin L, Man S, Ma L. Novel non-nucleic acid targets detection strategies based on CRISPR/Cas toolboxes: A review. Biosens Bioelectron 2022; 215:114559. [DOI: 10.1016/j.bios.2022.114559] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/20/2022] [Accepted: 07/07/2022] [Indexed: 12/26/2022]
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Fu Q, Zhou X, Wang M, Su X. Nanozyme-based sensitive ratiometric fluorescence detection platform for glucose. Anal Chim Acta 2022; 1216:339993. [DOI: 10.1016/j.aca.2022.339993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 01/06/2023]
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