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Kimoto H, Takahashi M, Masuko M, Sato K, Hirahara Y, Iiyama M, Suzuki Y, Hashimoto T, Hayashita T. High-Throughput Analysis of Bacterial Toxic Lipopolysaccharide in Water by Dual-Wavelength Monitoring Using a Ratiometric Fluorescent Chemosensor. Anal Chem 2023; 95:12349-12357. [PMID: 37524054 PMCID: PMC10448884 DOI: 10.1021/acs.analchem.3c01870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/20/2023] [Indexed: 08/02/2023]
Abstract
Lipopolysaccharide (LPS) is a bacterial toxin that causes fever in humans. Our small-molecule chemosensor named Zn-dpa-C2OPy shows rapid ratiometric fluorescence response to LPS in water with a detection limit of 11 pM, which is lower than that of our previously reported sensor. Spectroscopic measurements (fluorescence, absorbance, 1H NMR, and fluorescence lifetime), dynamic light scattering measurements, and transmission electron microscopy observations revealed that the fluorescence response was induced by the changes in the aggregation state via multi-point recognition of LPS through hydrophobic and electrostatic interactions, in addition to the coordination between the zinc(II)-dipicolylamine moiety of the chemosensor and the phosphate group of LPS. The proposed Zn-dpa-C2OPy chemosensor was applied to an original flow injection analysis (FIA) system with a self-developed dual-wavelength fluorophotometer, and a high throughput of 36 samples per hour was achieved. These results demonstrate the feasibility of this unique methodology combining a ratiometric fluorescent chemosensor and FIA for continuous online monitoring of LPS in water.
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Affiliation(s)
- Hiroshi Kimoto
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Moeka Takahashi
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Masakage Masuko
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
| | - Kai Sato
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
| | - Yuya Hirahara
- Graduate
School of Science and Technology, Sophia
University, Tokyo 102-8554, Japan
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Masamitsu Iiyama
- Technical
Development Division, Nomura Micro Science
Co., Ltd., Atsugi, Kanagawa 243-0021, Japan
| | - Yota Suzuki
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
- Graduate
School of Science and Engineering, Saitama
University, Saitama 338-8570, Japan
| | - Takeshi Hashimoto
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
| | - Takashi Hayashita
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, Japan
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2
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Gotti R, Fiori J, Furlanetto S, Orlandini S, Candela M, Franzellitti S. Assessment of bioaccumulation of glyphosate and aminomethylphosphonic acid in marine mussels using capillary electrophoresis with light‐emitting diode‐induced fluorescence detection. J Chromatogr A 2022; 1681:463452. [DOI: 10.1016/j.chroma.2022.463452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 10/15/2022]
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3
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Shen BB, Yuan JJ, Qian C, Gao H, Fang WJ. Investigation of an artifact during non-reduced capillary electrophoresis with sodium dodecyl sulfate analysis utilizing N-ethylmaleimide as an alkylation reagent. Anal Biochem 2022; 655:114833. [PMID: 35961398 DOI: 10.1016/j.ab.2022.114833] [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: 06/11/2022] [Accepted: 07/21/2022] [Indexed: 11/18/2022]
Abstract
This manuscript describes the formation of an artifact shoulder peak with a slightly larger retention time than the main peak under the standard non-reduced capillary electrophoresis with sodium dodecyl sulfate (nrCE-SDS) analysis of a therapeutic recombinant protein X, and clarifies the formation mechanism of the artifact caused by N-ethylmaleimide (NEM) during the sample preparation procedure. A design of experiment (DoE) approach was used to investigate the impact of the factors on the formation of the impurity. Additionally, orthogonal analytical experiments were performed to study the root cause of this phenomenon. The results consistently suggested that the Michael addition reaction between NEM and lysine residues in protein X, and decreased electrophoretic mobility due to increased molecular weight, was the root cause for the artifact, which could be partially inhibited by modifications of incubation conditions. Thus, before performing the nrCE-SDS method, the effects of alkylation reagents and sample preparation procedure on analytical results need to be considered seriously.
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Affiliation(s)
- Bin-Bin Shen
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Jun-Jie Yuan
- Zhejiang Bioray Biopharmaceutical Co., Ltd, Taizhou, 318000, China
| | - Ci Qian
- Zhejiang Bioray Biopharmaceutical Co., Ltd, Taizhou, 318000, China
| | - Han Gao
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Wei-Jie Fang
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou, 310016, China.
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4
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Mukunda DC, Joshi VK, Chandra S, Siddaramaiah M, Rodrigues J, Gadag S, Nayak UY, Mazumder N, Satyamoorthy K, Mahato KK. Probing nonenzymatic glycation of proteins by deep ultraviolet light emitting diode induced autofluorescence. Int J Biol Macromol 2022; 213:279-296. [DOI: 10.1016/j.ijbiomac.2022.05.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 03/25/2022] [Accepted: 05/22/2022] [Indexed: 01/03/2023]
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5
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Shirkavand A, Mohajerani E, Farivar S, Ataie-Fashtami L, Ghazimoradi MH. Quantitative Autofluorescence Imaging of A375 Human Melanoma Cell Samples: A Pilot Study. J Lasers Med Sci 2021; 12:e4. [PMID: 34084730 DOI: 10.34172/jlms.2021.04] [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] [Indexed: 12/13/2022]
Abstract
Introduction: Skin cancer is one of the most common types of malignancy worldwide. Human skin naturally contains several endogenous fluorophores, as potential sources can emit inherent fluorescence, called intrinsic autofluorescence (AF). The melanin endogenous fluorophore in the basal cell layer of the epidermis seems to have a strong autofluorescence signal among other ones in the skin. This pilot study aimed to investigate the feasibility of the detection of autofluorescence signals in the A375 human melanoma cell line in the cell culture stage using the FluoVision optical imaging system. Methods: The human skin melanoma cell line (A375) donated as a gift from Switzerland (University Hospital Basel) was cultured. For the imaging of the A375 human melanoma cell sample in this pilot study, the FluoVision optical imaging device (Tajhiz Afarinan Noori Parseh Co) was applied. The proposed clustering image processing code was developed based on the K-mean segmentation method, using MATLAB software (version 16). Results: The quantification of color pixels in the color bar along with the intensity score of the autofluorescence signal ranged between 0 and 70 was written in the image processing code execution and a threshold higher than 40%, proportional to the ratio of autofluorescent cells. The percentage of the signal of A375 autofluorescent melanoma cells in the 3 studied cell samples was calculated as 3.11%±0.6. Conclusion: This imaging method has the advantage of no need for fluorophore labels over the existing fluorescence imaging methods, and it can be regarded as one of the important choices of label-free imaging for this A375 melanoma cell line containing the intrinsic endogenous fluorophore in cell studies.
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Affiliation(s)
- Afshan Shirkavand
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran; Department of Medical Laser, Medical Laser Research Center, Yara Institute, ACECR, Tehran, Iran
| | - Ezeddin Mohajerani
- Professor of Photonics, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Shirin Farivar
- Associate Professor of Genetics, Stem Cells, Department of Cell and Molecular Biology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Leila Ataie-Fashtami
- Assistant Professor of Dermatology, Department of Regenerative Medicine, Royan Institute for Stem Cell Biology & Technology, ACECR, Tehran, Iran
| | - Mohammad Hossein Ghazimoradi
- Research Assistant of Genetics, Department of Cell and Molecular Biology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
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6
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Ta HY, Perquis L, Sarazin C, Guiard B, Meang VO, Collin F, Couderc F. 3-(4-Carboxybenzoyl)quinoline-2-carboxaldehyde labeling for direct analysis of amino acids in plasma is not suitable for simultaneous quantification of tryptophan, tyrosine, valine, and isoleucine by CE/fluorescence. Electrophoresis 2021; 42:1108-1114. [PMID: 33469939 DOI: 10.1002/elps.202000263] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 02/06/2023]
Abstract
Capillary electrophoresis coupled to LED-induced fluorescence detection is a robust and sensitive technique used for amino acids (AA) analysis in biological media, after labeling with 3-(4-carboxybenzoyl)quinoline-2-carboxaldehyde (CBQCA). We wanted to quantitate in plasma tryptophan (Trp), tyrosine (Tyr), valine (Val), and isoleucine (Ile). Among the different labeled AA-CBQCA, Trp has the lowest fluorescence yield, which makes its detection and quantification very difficult in biological samples such as plasma. We tried to improve Trp analysis by CE/LED-induced fluorescence detection to its maximal sensitivity by using large volume sample stacking as a preconcentration step in our analytical protocol. At pH 9.5, this step caused a drop in resolution during the separation of the four AAs and it was therefore necessary to work at pH 10. We have found that Tyr, Val, Ile, and Trp are detected and well separated from the other AAs, but Trp cannot be quantified in plasma samples, mainly because of the low fluorescence yield of the Trp-CBQCA derivative. The recorded LOD is 0.18 μM for Trp-CBQCA in standard solution with a resolution between Trp and Tyr of 1.2, while the LOD is 6 μM in plasma with the same resolution. Trp, Tyr, Val, and Ile are, however, efficiently quantified when using a 3 M acetic acid electrolyte and CE associated with capacitively coupled contactless conductivity detection, which also has the advantage of not requiring derivatization or large volume sample stacking. This article demonstrates, for the CE user, that quantitative analysis of these four AA in mouse plasma can be performed by CE-fluorescence after CBQCA labeling, with the exception of Trp. It can be advantageously replaced by CE/capacitively coupled contactless conductivity detection, the only efficient one for Trp, Tyr, Val, and Ile quantification. In this case, the LOD for Trp is 2 μM. The four AAs are separated with resolution with neighbors above 1.5.
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Affiliation(s)
- Hai Yen Ta
- Laboratoire des IMRCP, UMR 5623, Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
| | - Lucie Perquis
- Laboratoire des IMRCP, UMR 5623, Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
| | | | - Bruno Guiard
- CRCA, UMR 5169-Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
| | - Varravaddheay Ong Meang
- Laboratoire des IMRCP, UMR 5623, Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
| | - Fabrice Collin
- Laboratoire des IMRCP, UMR 5623, Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
| | - François Couderc
- Laboratoire des IMRCP, UMR 5623, Université Toulouse III Paul Sabatier, Université de Toulouse, Toulouse, France
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7
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Sohrabi S, Kassir N, Keshavarz Moraveji M. Droplet microfluidics: fundamentals and its advanced applications. RSC Adv 2020; 10:27560-27574. [PMID: 35516933 PMCID: PMC9055587 DOI: 10.1039/d0ra04566g] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/03/2020] [Accepted: 07/09/2020] [Indexed: 01/09/2023] Open
Abstract
Droplet-based microfluidic systems have been shown to be compatible with many chemical and biological reagents and capable of performing a variety of operations that can be rendered programmable and reconfigurable. This platform has dimensional scaling benefits that have enabled controlled and rapid mixing of fluids in the droplet reactors, resulting in decreased reaction times. This, coupled with the precise generation and repeatability of droplet operations, has made the droplet-based microfluidic system a potent high throughput platform for biomedical research and applications. In addition to being used as micro-reactors ranging from the nano- to femtoliter (10-15 liters) range; droplet-based systems have also been used to directly synthesize particles and encapsulate many biological entities for biomedicine and biotechnology applications. For this, in the following article we will focus on the various droplet operations, as well as the numerous applications of the system and its future in many advanced scientific fields. Due to advantages of droplet-based systems, this technology has the potential to offer solutions to today's biomedical engineering challenges for advanced diagnostics and therapeutics.
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Affiliation(s)
- Somayeh Sohrabi
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran Polytechnic Iran
| | - Nour Kassir
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran Polytechnic Iran
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8
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Le N, Subhash HM, Kilpatrick-Liverman L, Wang RK. Noninvasive multimodal imaging by integrating optical coherence tomography with autofluorescence imaging for dental applications. JOURNAL OF BIOPHOTONICS 2020; 13:e202000026. [PMID: 32191393 DOI: 10.1002/jbio.202000026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/09/2020] [Accepted: 03/16/2020] [Indexed: 05/25/2023]
Abstract
We report the development of an integrated multifunctional imaging system capable of providing anatomical (optical coherence tomography, OCT), functional (OCT angiography, OCTA) and molecular imaging (light-induced autofluorescence, LIAF) for in vivo dental applications. Blue excitation light (405 nm) was used for LIAF imaging, while the OCT was powered by a 1310 nm swept laser source. A red-green-blue digital camera, with a 450 nm cut-on broadband optical filter, was used for LIAF detection. The exciting light source and camera were integrated directly with the OCT scanning probe. The integrated system used two noninvasive imaging modalities to improve the speed of in vivo OCT data collection and to better target the regions of interest. The newly designed system maintained the ability to detect differences between healthy and hypomineralized teeth, identify dental biofilm and visualize the microvasculature of gingival tissue. The development of the integrated OCT-LIAF system provides an opportunity to conduct clinical studies more efficiently, examining changes in oral conditions over time.
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Affiliation(s)
- Nhan Le
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Hrebesh M Subhash
- Clinical Method Development - Oral Care, Colgate-Palmolive Company, Piscataway, NJ, USA
| | | | - Ruikang K Wang
- Department of Bioengineering, University of Washington, Seattle, WA, USA
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9
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Shi M, Geng X, Wang C, Guan Y. Quantification of Low Copy Number Proteins in Single Cells. Anal Chem 2019; 91:11493-11496. [PMID: 31476854 DOI: 10.1021/acs.analchem.9b02989] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We have developed an ultrasensitive and highly selective method to quantify low copy number intracellular proteins in a single cell using a low-cost laser-induced fluorescence (LIF) detector and a BV605 fluorescent probe. Active caspase3 proteins in cells were labeled by corresponding antibody-BV605 fluorescent binding, and a cell was injected into a 20 cm × 50 μm i.d. capillary column, followed by in situ lysis and capillary electrophoresis (CE)-LIF analysis. About seven active caspase3 protein molecules in a detection volume of 91 pL could be detected. In our method, cross-bounding proteins other than active caspase3 could be separated and distinguished by differences of retention time. By using Si photodiode assembly as a fluorescent detector instead of PMT, the dynamic range of the LIF is over 4 orders of magnitude. In this experiment, we found that the number of active caspase3 molecules in 98 single Jurkat cells were from 629 to 12171, reflecting significant heterogeneity among the cells although they were from the same batch. For extended application, it could also be applied to quantify other types of low copy number proteins in a single cell as long as the corresponding antibodies are provided. This high-sensitive method could also be a promising tool for earlier cancer diagnosis and related disease pathway research which is relevant to low copy number proteins. In addition, this low-cost system could also be easily expanded to an array system for high-throughput quantitation of low copy proteins in single cells.
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Affiliation(s)
- Meng Shi
- Department of Instrumentation & Analytical Chemistry, CAS Key Laboratory of Separation Sciences for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China.,University of Chinese Academy of Sciences , Beijing 100049 , P.R. China
| | - Xuhui Geng
- Department of Instrumentation & Analytical Chemistry, CAS Key Laboratory of Separation Sciences for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
| | - Chengye Wang
- Department of Thoracic Surgery , The Second Hospital of Dalian Medical University , No. 467, Zhongshan Road , Dalian , Liaoning 116023 , China
| | - Yafeng Guan
- Department of Instrumentation & Analytical Chemistry, CAS Key Laboratory of Separation Sciences for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , China
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10
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A facile and high sensitive micro fluorimeter based on light emitting diode and photodiode. Talanta 2017; 175:183-188. [DOI: 10.1016/j.talanta.2017.07.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 07/03/2017] [Accepted: 07/05/2017] [Indexed: 11/23/2022]
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11
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Cationic gemini pyrrolidinium surfactants based sweeping-micellar electrokinetic chromatography for simultaneous detection of nine organic pollutants in environmental water. J Chromatogr A 2016; 1475:95-101. [DOI: 10.1016/j.chroma.2016.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/23/2016] [Accepted: 11/01/2016] [Indexed: 11/20/2022]
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12
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Capillary electrophoresis hyphenated with UV-native-laser induced fluorescence detection (CE/UV-native-LIF). Electrophoresis 2016; 38:135-149. [DOI: 10.1002/elps.201600248] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/11/2016] [Accepted: 07/12/2016] [Indexed: 01/01/2023]
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13
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Štěpánová S, Kašička V. Recent applications of capillary electromigration methods to separation and analysis of proteins. Anal Chim Acta 2016; 933:23-42. [DOI: 10.1016/j.aca.2016.06.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 05/10/2016] [Accepted: 06/03/2016] [Indexed: 10/21/2022]
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14
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Oukacine F, Quirino JP, Mesbah K, Taverna M. Capillary electrophoretic focusing of covalently derivatized protein induced by surfactant. Electrophoresis 2016; 37:1151-4. [DOI: 10.1002/elps.201600030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 01/10/2023]
Affiliation(s)
- Farid Oukacine
- Université Grenoble Alpes; DPM UMR 5063; CNRS Grenoble France
| | - Joselito P. Quirino
- Australian Centre for Research on Separation Science, School of Physical Sciences-Chemistry; University of Tasmania; Hobart Tasmania Australia
| | - Kiarach Mesbah
- Inst Galien Paris Sud; Fac Pharm; 5 Rue JB Clement, F-92290 Chatenay Malabry France
| | - Myriam Taverna
- Inst Galien Paris Sud; Fac Pharm; 5 Rue JB Clement, F-92290 Chatenay Malabry France
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15
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Le Potier I, Boutonnet A, Ecochard V, Couderc F. Chemical and Instrumental Approaches for Capillary Electrophoresis (CE)-Fluorescence Analysis of Proteins. Methods Mol Biol 2016; 1466:1-10. [PMID: 27473477 DOI: 10.1007/978-1-4939-4014-1_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Capillary electrophoresis (CE) coupled to fluorescence detection is an invaluable technique for the quantitative analysis of proteins of interest in the field of clinical diagnosis and quality control of novel biotechnology products. The various chemical and instrumental approaches that have been reported to carry out such sensitive analysis are described in this paper. To illustrate the contribution of CE to the analysis of therapeutic proteins, a detailed protocol for impurities profiling of a recombinant antibody sample using CE-LEDIF is given.
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Affiliation(s)
- Isabelle Le Potier
- Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Université Paris-Saclay, 5 rue Jean Baptiste Clément, Châtenay-Malabry, 92290, France
| | - Audrey Boutonnet
- Picometrics Technologies, 478 rue de la Découverte, Labège, 31670, France
| | - Vincent Ecochard
- IPBS, Université Paul Sabatier, Université de Toulouse, 205 Route de Narbonne, Toulouse, 31062, France
| | - François Couderc
- Laboratoire des IMRCP, Université Paul Sabatier, Université de Toulouse, 118 Route de Narbonne, Toulouse, 31062, France.
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16
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Macka M, Piasecki T, Dasgupta PK. Light-emitting diodes for analytical chemistry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2014; 7:183-207. [PMID: 24818811 DOI: 10.1146/annurev-anchem-071213-020059] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Light-emitting diodes (LEDs) are playing increasingly important roles in analytical chemistry, from the final analysis stage to photoreactors for analyte conversion to actual fabrication of and incorporation in microdevices for analytical use. The extremely fast turn-on/off rates of LEDs have made possible simple approaches to fluorescence lifetime measurement. Although they are increasingly being used as detectors, their wavelength selectivity as detectors has rarely been exploited. From their first proposed use for absorbance measurement in 1970, LEDs have been used in analytical chemistry in too many ways to make a comprehensive review possible. Hence, we critically review here the more recent literature on their use in optical detection and measurement systems. Cloudy as our crystal ball may be, we express our views on the future applications of LEDs in analytical chemistry: The horizon will certainly become wider as LEDs in the deep UV with sufficient intensity become available.
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Affiliation(s)
- Mirek Macka
- Australian Center for Research on Separation Science and School of Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
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17
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Abstract
Diffuse optical imaging is highly versatile and has a very broad range of applications in biology and medicine. It covers diffuse optical tomography, fluorescence diffuse optical tomography, bioluminescence, and a number of other new imaging methods. These methods of diffuse optical imaging have diversified instrument configurations but share the same core physical principle – light propagation in highly diffusive media, i.e., the biological tissue. In this review, the author summarizes the latest development in instrumentation and methodology available to diffuse optical imaging in terms of system architecture, light source, photo-detection, spectral separation, signal modulation, and lastly imaging contrast.
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18
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Poinsot V, Ong-Meang V, Gavard P, Couderc F. Recent advances in amino acid analysis by capillary electromigration methods, 2011-2013. Electrophoresis 2013; 35:50-68. [DOI: 10.1002/elps.201300306] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 09/11/2013] [Accepted: 09/11/2013] [Indexed: 12/28/2022]
Affiliation(s)
- Véréna Poinsot
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
| | | | - Pierre Gavard
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
| | - François Couderc
- Laboratoire des IMRCP; Université Paul Sabatier; Toulouse France
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19
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Xiong XJ, Guo XF, Ge XX, Wang H, Zhang HS. Determination of neurotransmitter amino acids in mouse central nervous system by CE-LIF. J Sep Sci 2013; 36:3264-9. [PMID: 23894032 DOI: 10.1002/jssc.201300464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/02/2013] [Accepted: 07/08/2013] [Indexed: 12/28/2022]
Abstract
An MEKC method with LIF detection has been developed for the determination of seven neurotransmitter amino acids (NAAs) using 1,3,5,7-tetramethyl-8-(N-hydroxysuccinimidyl butyric ester)difluoroboradiaza-S-indacene as the labeling reagent. After derivatization at room temperature for 30 min, the seven target NAAs including glycine, alanine, γ-aminobutyric acid, taurine, glutamine, glutamic acid, and aspartic acid were separated in running buffer, which consisted of 70 mM pH 4.00 H3 PO4 /Na3 PO4 buffer, 5.5 mM cetyltrimethyl ammonium bromide and 20% v/v acetonitrile within 17 min. The LODs were 2 ~ 14 × 10(-10) M without interference from other coexisting amino acids. The proposed method has been applied to the analysis of NAAs in the central nervous systems of healthy mice and those with Alzheimer's disease with recoveries of 92-104%.
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Affiliation(s)
- Xu-Jie Xiong
- Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University, Huangzhou, China
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Mesbah K, Oukacine F, Lehnert S, Otto M, Taverna M. On-line capillary electrophoresis derivatization method for high sensitivity analysis of ubiquitin in filtered cerebrospinal fluid. Electrophoresis 2013; 34:2733-9. [DOI: 10.1002/elps.201300155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/20/2013] [Accepted: 06/20/2013] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Stefan Lehnert
- Department of Neurology; University of Ulm; Ulm; Germany
| | - Markus Otto
- Department of Neurology; University of Ulm; Ulm; Germany
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Enzonga J, Ong-Meang V, Couderc F, Boutonnet A, Poinsot V, Tsieri MM, Silou T, Bouajila J. Determination of free amino acids in African gourd seed milks by capillary electrophoresis with light-emitting diode induced fluorescence and laser-induced fluorescence detection. Electrophoresis 2013; 34:2632-8. [DOI: 10.1002/elps.201300136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 06/13/2013] [Accepted: 06/28/2013] [Indexed: 02/05/2023]
Affiliation(s)
| | - Varravaddheay Ong-Meang
- Laboratoire des Interactions, Moléculaires et Réactivité Chimique et Photochimique UMR CNRS 5623; Université de Toulouse; Université Paul-Sabatier; Toulouse; France
| | - François Couderc
- Laboratoire des Interactions, Moléculaires et Réactivité Chimique et Photochimique UMR CNRS 5623; Université de Toulouse; Université Paul-Sabatier; Toulouse; France
| | | | - Véréna Poinsot
- Laboratoire des Interactions, Moléculaires et Réactivité Chimique et Photochimique UMR CNRS 5623; Université de Toulouse; Université Paul-Sabatier; Toulouse; France
| | | | - Thomas Silou
- Equipe pluridisciplaire en Alimentation et Nutrition; Faculté de Sciences; Université Marien Ngouabi; Brazzaville; Congo
| | - Jalloul Bouajila
- Laboratoire des Interactions, Moléculaires et Réactivité Chimique et Photochimique UMR CNRS 5623; Université de Toulouse; Université Paul-Sabatier; Toulouse; France
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Ji H, Li M, Guo L, Yuan H, Wang C, Xiao D. Design and evaluation of capillary coupled with optical fiber light-emitting diode induced fluorescence detection for capillary electrophoresis. Electrophoresis 2013; 34:2546-52. [DOI: 10.1002/elps.201300125] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Revised: 05/06/2013] [Accepted: 05/30/2013] [Indexed: 12/17/2022]
Affiliation(s)
- Hongyun Ji
- College of Chemistry; Sichuan University; Chengdu P. R. China
| | - Meng Li
- College of Chemistry; Sichuan University; Chengdu P. R. China
| | - Lihong Guo
- College of Chemistry; Sichuan University; Chengdu P. R. China
| | - Hongyan Yuan
- College of Chemical Engineering; Sichuan University; Chengdu P. R. China
| | - Chunling Wang
- College of Chemical Engineering; Sichuan University; Chengdu P. R. China
| | - Dan Xiao
- College of Chemistry; Sichuan University; Chengdu P. R. China
- College of Chemical Engineering; Sichuan University; Chengdu P. R. China
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Liu K, Wang L. Enantioseparations of amino acids by capillary array electrophoresis with 532nm laser induced fluorescence detection. J Chromatogr A 2013; 1295:142-6. [DOI: 10.1016/j.chroma.2013.04.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 03/25/2013] [Accepted: 04/17/2013] [Indexed: 02/06/2023]
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