1
|
Wu H, Bu T, Cao Y, Wang Y, Xi J, Li M, Li R, Jia P, Wang L. Double-Enzyme Active Vanadium Nanospheres-Mediated Ratiometric Multicolor Immunosensors for Sensitive Detection of the T-2 Toxin. Anal Chem 2023; 95:5275-5284. [PMID: 36898021 DOI: 10.1021/acs.analchem.2c05197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Owing to its high throughput, simplicity, and rapidity, enzyme-linked immunosorbent assay (ELISA) has attracted much attention in the field of immunoassays. However, the traditional ELISA usually affords a single signal readout and the labeling ability of the enzyme used is poor, resulting in low accuracy and a limited detection range. Herein, a vanadium nanospheres (VNSs)-mediated competitive ratio nanozymes-linked immunosorbent assay (VNSs-RNLISA) was created for the sensitive detection of the T-2 toxin (T-2). As the key to the biosensor, the VNSs with superoxide dismutase-like and peroxidase-like dual-enzyme mimetic activities were synthesized by a one-step hydrothermal method, which oxidized 1,1-diphenyl-2-picryl-hydrazyl fading and catalyzed 3,3',5,5'-tetramethylbenzidine (TMB) color development. Therefore, T-2 could not only be qualitatively measured with the naked eye but also be quantitatively evaluated by monitoring the ratio of absorbance at 450 and 517 nm wavelengths. Moreover, the characterization of a VNSs-labeled antibody probe showed strong dual-enzymatic activity, excellent stability, and high affinity with T-2 [the affinity constant (ka) was approximately 1.36 × 108 M-1], which can significantly improve the detection sensitivity. The limit of detection of VNSs-RNLISA was 0.021 ng/mL, which was approximately 27-fold more sensitive than the single signal nanozymes-linked immunosorbent assay (0.561 ng/mL). Besides, the change in the ratio of absorbance (Δ450/Δ517) decreased linearly in a range of 0.22-13.17 ng/mL, outperforming the detection range of a single-mode nano-enzyme-linked immunosorbent assay using TMB by a factor of 1.6 times. Furthermore, the VNSs-RNLISA was successfully used to identify T-2 in maize and oat samples, with recoveries ranging from 84.216 to 125.371%. Overall, this tactic offered a promising platform for the quick detection of T-2 in food and might broaden the application range of the enzyme-linked immunosorbent assay.
Collapse
Affiliation(s)
- Haiyu Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Tong Bu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Yuanyuan Cao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Ying Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Jia Xi
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Mingyan Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Ruixia Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Pei Jia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| | - Li Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.,Shenzhen Research Institute, Northwest A&F University, Shenzhen 518000, China
| |
Collapse
|
2
|
Hassan SS, Bedir EA, Hamza AEM, Ahmed AM, Ibrahim NM, Abd El‐Ghany MS, Khattab NN, Emeira BM, Salama MM, Mohamed EF, Fayed DB. The dual therapeutic effect of metformin nuclei‐based drugs modified with one of Tulbaghia violacea extract compounds. Appl Organomet Chem 2022; 36. [DOI: 10.1002/aoc.6804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/13/2022] [Indexed: 09/01/2023]
Abstract
Novel Schiff base was synthesized from the condensation reaction of metformin with [4‐(Diethylamino) benzaldehyde (NBM). Different metal complexes were prepared using Pd (II), Pt (II), Cu (II), and V (IV) metal ions. All complexes showed the nonelectrolytic behavior. So, the expected molecular formulas for complexes were [Pd (NBM)Cl2], [Pt (NBM)Cl2], [Cu (NBM)2Cl2] and [VO (NBM)2]. The cytotoxicity of (NBM) Schiff base and its metal complexes on human cancer cell line, MCF‐7, was investigated. V (IV) and Cu (II) complexes showed potential blood glucose lowering effect higher than the commercial metformin drug. VO (II) complex has superior antioxidant activity more than the other synthesized compounds and the standard ascorbic acid. Molecular docking investigation proved the presence of interesting interactions between all synthesized compounds with the active site amino acids of EGFR tyrosine kinase (anticancer activity). The molecular docking of metal complexes has observed effective inhibition for the specific mTOR protein that is expected to aid the growth of the COVID‐19 virus.
Collapse
Affiliation(s)
- Safaa S. Hassan
- Department of Chemistry, Faculty of Science Cairo University Giza Egypt
| | - Elaria A. Bedir
- Department of Biotechnology, Faculty of Science Cairo University Giza Egypt
| | | | - Ahmed M. Ahmed
- Department of Biotechnology, Faculty of Science Cairo University Giza Egypt
| | - Nouran M. Ibrahim
- Department of Biotechnology, Faculty of Science Cairo University Giza Egypt
| | | | - Nada N. Khattab
- Department of Biotechnology, Faculty of Science Cairo University Giza Egypt
| | - Bassant M. Emeira
- Department of Biotechnology, Faculty of Science Cairo University Giza Egypt
| | - Mabrook M. Salama
- Department of Chemistry, Faculty of Science University of Benghazi Benghazi Libya
| | - Eman F. Mohamed
- Department of Chemistry, Faculty of Science (Girls) Al‐Azhar University Nasr City Egypt
| | - Dalia B. Fayed
- Therapeutic Chemistry Department National Research Centre Cairo Egypt
| |
Collapse
|
4
|
Sun X, Zhang X, Li Y, Xu Y, Su H, Che W, He J, Zhang H, Liu M, Zhou W, Cheng W, Liu Q. In Situ Construction of Flexible VNi Redox Centers over Ni-Based MOF Nanosheet Arrays for Electrochemical Water Oxidation. SMALL METHODS 2021; 5:e2100573. [PMID: 34927938 DOI: 10.1002/smtd.202100573] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/24/2021] [Indexed: 06/14/2023]
Abstract
Atomic-level design and construction of synergistic active centers are central to develop advanced oxygen electrocatalysts toward efficient energy conversion. Herein, an in situ construction strategy to introduce flexible redox sites of VNi centers onto Ni-based metal-organic framework (MOF) nanosheet arrays (NiV-MOF NAs) as a promising oxygen electrocatalyst is developed. The abundant redox VNi centers with flexible metal valence states of V+3/+4/+5 and Ni+3/+2 enable NiV-MOF NAs excellent oxygen evolution reaction (OER) activity and a long-term stability under high current densities, achieving current densities of 10 and 100 mA cm-2 at recorded overpotentials of 189 and 290 mV, respectively, and showing ignorable decay of initial activity at 100 mA cm-2 after 100 h OER operation. Operando synchrotron radiation Fourier transform infrared combined with quasi in situ X-ray absorption fine structure spectroscopies reveal at atomic level that the flexible V sites can continuously accept electrons from adjacent active Ni sites to accelerate OER kinetics for NiV-MOF NAs during the reaction process, accompanied by a self-optimized structural distortion of VO6 octahedron for promoting the electrochemical stability.
Collapse
Affiliation(s)
- Xuan Sun
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Xiuxiu Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Yuanli Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Yanzhi Xu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Hui Su
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wei Che
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Jingfu He
- School of Materials, Sun Yat-sen University, Guangzhou, Guangdong, 510275, P. R. China
| | - Hui Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Meihuan Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wanlin Zhou
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Weiren Cheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| |
Collapse
|
5
|
Akl MA, El-gharkawy ESR, El-mahdy NA, El-Sheikh SM, Sheta SM. A novel nano copper complex: potentiometry, DFT and application as a cancer prostatic biomarker for the ultrasensitive detection of human PSA. Dalton Trans 2020; 49:15769-15778. [DOI: 10.1039/d0dt03318a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel analytical approach for cancer prostatic biomarker by PSA detection using nano-Cu(II)-complex.
Collapse
Affiliation(s)
- Magda A. Akl
- Chemistry Department
- Faculty of Science
- Mansoura University
- Mansoura
- Egypt
| | | | - Nora A. El-mahdy
- Chemistry Department
- Faculty of Science
- Mansoura University
- Mansoura
- Egypt
| | - Said M. El-Sheikh
- Nanomaterials and Nanotechnology Department
- Central Metallurgical R & D Institute
- Cairo
- Egypt
| | - Sheta M. Sheta
- Inorganic Chemistry Department
- National Research Centre
- Egypt
| |
Collapse
|