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Berthou M, Clarot I, Gouyon J, Steyer D, Monat MA, Boudier A, Pallotta A. Thiol sensing: From current methods to nanoscale contribution. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li R, He X, Javed R, Cai J, Cao H, Liu X, Chen Q, Ye D, Zhao H. Switching on-off-on colorimetric sensor based on Fe-N/S-C single-atom nanozyme for ultrasensitive and multimodal detection of Hg 2. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155428. [PMID: 35469883 DOI: 10.1016/j.scitotenv.2022.155428] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/28/2022] [Accepted: 04/17/2022] [Indexed: 05/15/2023]
Abstract
Single-atom nanozymes (SAzymes) as a new class of efficient nanozymes have attracted extensive research interest due to their high catalytic activity and specificity. However, it is challenging to develop a novel nanoenzyme with high activity, good stability and reproducibility. In this paper, the nitrogen and sulfur coordinated Fe-N/S-C SAzymes were synthesized using peanuts shells as carbon, nitrogen and sulfur source. It shows high oxidase-like activities due to the doping of S induced geometric and electronic effects, which is further confirmed by density functional theory calculations. The prepared Fe-N/S-C SAzymes with the remarkable oxidase-mimicking activity could oxidize TMB to blue oxTMB, but the GSH can inhibit the oxidation of TMB resulting in blue fading. However, when Hg2+ is added into above system, Hg2+-SH complexes are generated attributed to a high affinity between GSH and Hg2+, ultimately leading to blue recovery. Based on this phenomenon, we constructed a novel "on-off-on" colorimetric sensor for the simultaneous detection of GSH (off) and Hg2+ (on), and the signal is acquired by various modes such as naked eye, UV-Vis spectrometer and smartphone. The colorimetric detection mode based on a smartphone showed a good linear response from 10 to 80 μM for GSH with a detection limit of 3.92 μM, and for Hg2+ with a linear range of 1 nM-10 μM and LOD of 0.17 nM, which is more suitable for routine laboratory applications. More importantly, the proposed colorimetric sensor has been successfully applied to the detection of GSH and Hg2+ in real samples with good analytical performance. This work not only provides a simple and cost-effective method to detect GSH and Hg2+ but also makes a certain contribution to environmental protection.
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Affiliation(s)
- Rui Li
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Xiaoting He
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Rida Javed
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Jian Cai
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Hongmei Cao
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China; Key Laboratory of Food Nutrition and Functional Food of Hainan Province, 58 Renmin Avenue, Haikou 570228, China.
| | - Xing Liu
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Qi Chen
- College of Food Science and Engineering, Key Laboratory of Tropical and Vegetables Quality and Safety for State Market Regulation, Hainan University, Haikou 570228, China
| | - Daixin Ye
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Hongbin Zhao
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China.
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Chen J, Li HF, Zhao G, Lin JM, He X. Matrix-assisted laser desorption ionization mass spectrometry based quantitative analysis of cordycepin from Cordyceps militaris. J Pharm Anal 2021; 11:499-504. [PMID: 34513126 PMCID: PMC8424359 DOI: 10.1016/j.jpha.2021.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/29/2021] [Accepted: 05/27/2021] [Indexed: 11/20/2022] Open
Abstract
Cordycepin, which has great immunomodulatory activities such as anticancer, antifungal, antivirus, antileukemia and lipid-lowering ones, is the secondary metabolite of Cordyceps militaris (C. militaris). Liquid submerged fermentation is the common cultivation process to produce cordycepin. To optimize the fermentation process and improve production, monitoring the cordycepin secretion in the fermentation is essential. The measurement based on chromatography-mass spectrometry methods is generally involved in the complex sample pretreatments and time-consuming separation, so more rapid and convenient methods are required. Matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) is more attractive for faster and direct detection. Therefore, MALDI-MS detection combined with isotope-labeled internal standard was applied to the measurement of cordycepin content in the fermentation broth and mycelium. This method made accurate quantification of cordycepin in the range of 5–400 μg/mL with a relative standard deviation of 5.6%. The recovery rates of fermentation samples after the 1, 13, and 25 days were 90.15%, 94.27%, and 95.06%, respectively. The contents of cordycepin in the mycelium and fermentation broth were 136 mg/g and 148.39 mg/mL on the 20th culture day, respectively. The cordycepin secretion curve of the liquid fermentation of C. militaris was real-time traced over 25 days. A rapid quantification method of cordycepin based on MALDI-MS is proposed. The quantification relies on the stable isotope standard method. Rapid determination of the cordycepin content in the liquid fermentation broth of Cordyceps militaris without pre-treatment. Monitoring the fermentation state of C. militaris fermentation broth is benefit to improve the yield of cordycepin.
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Affiliation(s)
- Jian Chen
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Science and Technology, Beijing Forestry University, Beijing, 100083, China.,Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Hai-Fang Li
- Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Guozhu Zhao
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Science and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Jin-Ming Lin
- Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Xiangwei He
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Science and Technology, Beijing Forestry University, Beijing, 100083, China
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Arabi M, Ostovan A, Bagheri AR, Guo X, Wang L, Li J, Wang X, Li B, Chen L. Strategies of molecular imprinting-based solid-phase extraction prior to chromatographic analysis. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115923] [Citation(s) in RCA: 197] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Niu T, Yin G, Yu T, Gan Y, Zhang C, Chen J, Wu W, Chen H, Li H, Yin P. A novel fluorescent probe for detection of Glutathione dynamics during ROS-induced redox imbalance. Anal Chim Acta 2020; 1115:52-60. [DOI: 10.1016/j.aca.2020.02.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/19/2020] [Accepted: 02/26/2020] [Indexed: 12/21/2022]
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Mass spectrometric investigation of concentration-dependent effect of curcumin and oxidative stress on intracellular glutathione levels. Anal Bioanal Chem 2020; 412:2873-2880. [PMID: 32112130 DOI: 10.1007/s00216-020-02524-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 02/05/2020] [Accepted: 02/14/2020] [Indexed: 10/24/2022]
Abstract
Herein, we investigated the correlation between curcumin and glutathione (GSH) levels in mammalian cells using gold nanoparticles (AuNPs) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). GSH exists in high concentration in the cytosol and acts as a major antioxidant and reducing agent in organisms. Previous studies showed that curcumin, a well-known antioxidant with anti-inflammatory, anti-proliferative, and anti-carcinogenic activities, affects GSH levels in mammalian cells. However, the correlation between their levels remains controversial and has not yet been completely elucidated. This study used our recent strategy of GSH quantification, where GSH in cell lysate is captured on maleimide groups of AuNPs and analyzed using MALDI-TOF MS with isotopomer GSH (GSH*)-conjugated AuNPs as an internal standard. The comparison between GSH and GSH* relative intensities allows the quantitation of GSH in cells. In this way, GSH levels in mammalian cells were investigated after incubation with curcumin at various concentrations with or without oxidative stress. We observed that intracellular GSH levels were affected by curcumin in a concentration-dependent manner with oxidative stress; GSH levels decrease at a lower curcumin concentration, which can be recovered at increased curcumin concentrations. We also found that the GSH level increased at all curcumin concentrations after a certain incubation time. We believe our strategy can be commonly used to determine GSH levels in cells that are treated differently with various exogenous stimulants like reactive oxygen species, biofunctional natural products, and drug candidates. Graphical abstract.
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Jiang HL, Li N, Cui L, Wang X, Zhao RS. Recent application of magnetic solid phase extraction for food safety analysis. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115632] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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