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Zhang JY, Zhang Y, Zou Y, Xu ZLB, Zhang B, Ren W. Physicochemically modulated fluorescence-scattering ratiometric sensor for selective and visual detection of levodopa. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 308:123746. [PMID: 38091648 DOI: 10.1016/j.saa.2023.123746] [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: 10/07/2023] [Revised: 11/08/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024]
Abstract
In this study, a facile fluorescence-scattering ratiometric sensor was designed for visual and selective detection of levodopa (LD) via a clever physicochemical modulation scheme. The alkalized products of LD can rapidly react with polyethyleneimine (PEI) to exhibit an intense blue fluorescence and decrease the second-order scattering (SOS) signal of PEI. As the concentration of LD increased, the fluorescence intensity at 420 nm increased and the SOS intensity at 675 nm decreased synchronously. Thus the fluorescence-scattering ratiometric sensor was constructed by virtue of the two simultaneously changed signals. Furthermore, red light-emitting Au nanoclusters (AuNCs) were added into the above mixture solution to enlarge the SOS signal and provide a stable red background fluorescence. The intensity ratio of fluorescence to SOS (F/(S/Sblank)) is linear dependent on CLD in the wide range of 50.0---30000.0 nM, and LD as low as 50.0 nM can be identified with the naked eye via change of fluorescence color. The developed ratiometric sensor is smart, simple and efficient, and has been applied to the convenient assay of LD in real samples. The proposed physicochemical modulation strategy provides a new and facile path for selectively and visually identifying the target from its analogues.
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Affiliation(s)
- Jin Yuan Zhang
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Ying Zhang
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
| | - Yu Zou
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Ze Li Bo Xu
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China
| | - Bo Zhang
- Clinical Lab, Zigong Maternal and Child Health Hospital, Zigong 643000, PR China
| | - Wang Ren
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China.
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Buyuktuncel E. Microchip Electrophoresis and Bioanalytical Applications. CURR PHARM ANAL 2019. [DOI: 10.2174/1573412914666180831100533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microanalytical systems have aroused great interest because they can analyze extremely
small sample volumes, improve the rate and throughput of chemical and biochemical analysis in a way
that reduces costs. Microchip Electrophoresis (ME) represents an effective separation technique to perform
quick analytical separations of complex samples. It offers high resolution and significant peak
capacity. ME is used in many areas, including biology, chemistry, engineering, and medicine. It is established
the same working principles as Capillary Electrophoresis (CE). It is possible to perform electrophoresis
in a more direct and convenient way in a microchip. Since the electric field is the driving
force of the electrodes, there is no need for high pressure as in chromatography. The amount of the voltage
that is applied in some electrophoresis modes, e.g. Micelle Electrokinetic Chromatography (MEKC)
and Capillary Zone Electrophoresis (CZE), mainly determines separation efficiency. Therefore, it is
possible to apply a higher electric field along a considerably shorter separation channel, hence it is possible
to carry out ME much quicker.
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Affiliation(s)
- Ebru Buyuktuncel
- Faculty of Pharmacy, Department of Analytical Chemistry, Inonu University, 44280, Malatya, Turkey
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Fernandez-Pastor I, Luque-Muñoz A, Rivas F, Medina-O'Donnell M, Martinez A, Gonzalez-Maldonado R, Haidour A, Parra A. Quantitative NMR analysis of L-Dopa in seeds from two varieties of Mucuna pruriens. PHYTOCHEMICAL ANALYSIS : PCA 2019; 30:89-94. [PMID: 30216583 DOI: 10.1002/pca.2793] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/25/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION L-Dopa, a key neurotransmitter used to treat neural disorders such as Parkinson's disease, is found in the seeds of the genus Mucuna at a sufficient concentration for possible commercial use. OBJECTIVE To develop a simple and reliable method to extract L-Dopa from M. pruriens seeds in an aqueous medium and then quantitate this compound using a 1 H qNMR method (internal standard); and also to evaluate the accuracy and reproducibility of this method with an NMR calibration curve. METHODOLOGY The extraction method of L-Dopa from M. pruriens was optimized. The quantitation with single point quantitative NMR (qNMR) and NMR calibration curve was based on the resonance properties of the main functional groups of the L-Dopa molecule, in particular the signals of the three aromatic protons, which were compared with the signal of an internal standard such as syringic acid. The accuracy (precision and trueness) and reproducibility of both NMR techniques were evaluated. RESULTS The methods of single point qNMR and NMR calibration curve, applied to the seeds of two M. pruriens varieties, gave very similar L-Dopa contents: 3.0-3.2% and 3.0-3.1%, respectively. CONCLUSION The statistical analysis confirmed the accuracy and reproducibility of this single point qNMR method (internal standard) for determining L-Dopa, as well as other commercial preparations of this species, without performing an NMR calibration curve.
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Affiliation(s)
- Ignacio Fernandez-Pastor
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Antonio Luque-Muñoz
- Unidad de Resonancia Magnetica Nuclear, Centro de Instrumentacion Cientifica, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Francisco Rivas
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Marta Medina-O'Donnell
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Antonio Martinez
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | | | - Ali Haidour
- Unidad de Resonancia Magnetica Nuclear, Centro de Instrumentacion Cientifica, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
| | - Andres Parra
- Departamento de Quimica Organica, Facultad de Ciencias, Universidad de Granada, Fuentenueva s/n, E-18071, Granada, Spain
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Li J, Sun Y, Chen J. Identification of Critical Genes and miRNAs Associated with the Development of Parkinson's Disease. J Mol Neurosci 2018; 65:527-535. [PMID: 30083784 DOI: 10.1007/s12031-018-1129-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 07/18/2018] [Indexed: 01/18/2023]
Abstract
The purpose of this study was to explore the key mechanism involved in the pathogenesis of Parkinson's disease (PD) based on microarray analysis. The expression profile data of GSE7621, which contained 9 substantia nigra tissues isolated from normals and 16 substantia nigra tissues isolated from PD patients, was obtained from Gene Expression Omnibus. The differentially expressed genes (DEGs) were screened, followed by functional enrichment analysis and protein-protein interaction (PPI) network construction. After the miRNAs regulating the DEGs were predicted, the miRNA-DEG regulatory network was then constructed. Besides, the 6-hydroxydopamine rat model of PD was established and the expression of key DEGs and miRNA was detected. A total of 388 DEGs were identified, including 218 upregulated genes and 170 downregulated ones. Tyrosine hydroxylase (TH) and solute carrier family 6 member 3 (SLC6A3) were significantly related to the functional terms of catecholamine biosynthetic process and dopamine biosynthetic process. TH and SLC6A3 were hub nodes in the PPI network. EBF3 could be targeted by miR-218. Moreover, TH and SLC6A3 were found downregulated in the 6-OHDA rat model of PD, while miR-218 was markedly upregulated. Our results reveal that SLC6A3, TH, and EBF3 targeted by miR-218 could be involved in PD. These molecules might provide a new insight into the development of therapeutic strategies for PD.
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Affiliation(s)
- Jia Li
- Department of Neurology, China-Japan Union Hospital of Jilin University, Xiantai Road, Erdao District, Changchun, 130033, Jilin, China
| | - Yajuan Sun
- Department of Neurology, China-Japan Union Hospital of Jilin University, Xiantai Road, Erdao District, Changchun, 130033, Jilin, China
| | - Jiajun Chen
- Department of Neurology, China-Japan Union Hospital of Jilin University, Xiantai Road, Erdao District, Changchun, 130033, Jilin, China.
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Yang Y, Liu F, Wan Y. Simultaneous determination of 4-hydroxyphenyl lactic acid, 4-hydroxyphenyl acetic acid, and 3,4-hydroxyphenyl propionic acid in human urine by ultra-high performance liquid chromatography with fluorescence detection. J Sep Sci 2017; 40:2117-2122. [DOI: 10.1002/jssc.201700014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/10/2017] [Accepted: 03/13/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Yongli Yang
- College of Chemistry; Nanchang University; Nanchang Jiangxi P. R. China
| | - Fan Liu
- Center of Analysis and Testing; Nanchang University; Nanchang Jiangxi P. R. China
| | - Yiqun Wan
- College of Chemistry; Nanchang University; Nanchang Jiangxi P. R. China
- Center of Analysis and Testing; Nanchang University; Nanchang Jiangxi P. R. China
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Denoroy L, Parrot S. Analysis of Amino Acids and Related Compounds by Capillary Electrophoresis. SEPARATION AND PURIFICATION REVIEWS 2016. [DOI: 10.1080/15422119.2016.1212378] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Wu Y, Zhao W, Zhu X, Wang F, Zhang M, Fan X, Yuan Y, Hu C, Deng X, Adams E. Improved liquid chromatography combined with pulsed electrochemical detection for the analysis of etimicin sulfate. J Sep Sci 2016; 39:1471-9. [DOI: 10.1002/jssc.201501317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 02/07/2016] [Accepted: 02/15/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Yuning Wu
- Jiangsu Institute for Food and Drug Control; Nanjing China
- China Pharmaceutical University; Nanjing China
| | - Wei Zhao
- Jiangsu Institute for Food and Drug Control; Nanjing China
| | - Xiaoyue Zhu
- Jiangsu Institute for Food and Drug Control; Nanjing China
| | - Fang Wang
- China Pharmaceutical University; Nanjing China
| | - Mei Zhang
- Jiangsu Institute for Food and Drug Control; Nanjing China
| | - Xialei Fan
- Jiangsu Institute for Food and Drug Control; Nanjing China
| | - Yaozuo Yuan
- Jiangsu Institute for Food and Drug Control; Nanjing China
| | - Changqin Hu
- National Institute for Food and Drug Control; Beijing China
| | - Xiaolan Deng
- Department of Pharmaceutical Analysis; School of Pharmacy, China Medical University; Shenyang China
| | - Erwin Adams
- Department of Pharmaceutical & Pharmacological Sciences, Pharmaceutical Analysis, KU Leuven; University of Leuven; Belgium
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Recent applications of microchip electrophoresis to biomedical analysis. J Pharm Biomed Anal 2015; 113:72-96. [DOI: 10.1016/j.jpba.2015.03.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/28/2015] [Accepted: 03/03/2015] [Indexed: 11/22/2022]
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Lucca BG, Lunte SM, Tomazelli Coltro WK, Ferreira VS. Separation of natural antioxidants using PDMS electrophoresis microchips coupled with amperometric detection and reverse polarity. Electrophoresis 2014; 35:3363-70. [PMID: 25224541 DOI: 10.1002/elps.201400359] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 12/12/2022]
Abstract
This report describes the use of PDMS ME coupled with amperometric detection for rapid separation of ascorbic, gallic , ferulic, p-coumaric acids using reverse polarity. ME devices were fabricated in PDMS by soft lithography and detection was accomplished using an integrated carbon fiber working electrode aligned in the end-channel configuration. Separation and detection parameters were investigated and the best conditions were obtained using a run buffer consisting of 5 mM phosphate buffer (pH 6.9) and a detection voltage of 1.0 V versus Ag/AgCl reference electrode. All compounds were separated within 70 s using gated injection mode with baseline resolution and separation efficiencies between 1200 and 9000 plates. Calibration curves exhibited good linearity and the LODs achieved ranged from 1.7 to 9.7 μM. The precision for migration time and peak height provided maximum values of 4% for the intrachip studies. Lastly, the analytical method was successfully applied for the analysis of ascorbic and gallic acids in commercial beverage samples. The results achieved using ME coupled with amperometric detection were in good agreement with the values provided by the supplier. Based on the data reported here, the proposed method shows suitability to be applied for the routine analysis of beverage samples.
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Affiliation(s)
- Bruno Gabriel Lucca
- Instituto de Química, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
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A comparative study of different microchips for capillary electrophoresis with electrochemical detection. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0764-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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