1
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Somnin C, Chamieh J, Saetear P, Cottet H. Taylor dispersion analysis using capacitively coupled contactless conductivity detector. Talanta 2024; 272:125815. [PMID: 38402737 DOI: 10.1016/j.talanta.2024.125815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/17/2024] [Accepted: 02/18/2024] [Indexed: 02/27/2024]
Abstract
Taylor dispersion analysis (TDA) is a simple and absolute method to determine the hydrodynamic radius of solutes that respond to UV or fluorescence detections. To broaden the application range of TDA, it is necessary to develop new detection modes. This study aims to study capacitively coupled contactless conductivity detector (C4D) for the analysis of charged macromolecules. The detection sensitivities and hydrodynamic radii were compared for a C4D detector and a UV detector on positively or negatively charged polymers responding both to UV and C4D (poly-L-lysine and poly(acrylamide-co-2-acrylamido-1-methyl-propanesulfonate). The influence of the composition of the background electrolyte on the detection sensitivity has been studied and optimized for C4D detection. The influence of the molar mass and of the polymer chemical charge density on the C4D and UV sensitivities of detection have been investigated based on well-characterized copolymers samples of different molar masses and charge densities. The advantages and disadvantages compared to UV detection, as well as the range of applicability of C4D detection in TDA were identified. C4D detection can be an alternative method for sizing charged polymers of reasonable molar mass (typically below 105 g mol-1) that do not absorb in UV. A decline in the sensitivity of detection in C4D was observed for higher molar masses.
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Affiliation(s)
| | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Ratchathewi District, Bangkok, 10110, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi District, Bangkok, 10400, Thailand.
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France.
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2
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Prakobdi C, Baldo TA, Aryal P, Link J, Saetear P, Henry CS. Non-invasive iron deficiency diagnosis: a saliva-based approach using capillary flow microfluidics. Anal Methods 2024; 16:2489-2495. [PMID: 38502566 DOI: 10.1039/d3ay01933k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Iron deficiency anemia (IDA) is a condition characterized by lower-than-average iron (Fe) levels in the body, affecting a substantial number of young children and pregnant women globally. Existing diagnostic methods for IDA rely on invasive analysis of stored Fe in ferritin from blood samples, posing challenges, especially for toddlers and young children. To address this issue, saliva has been proposed as a non-invasive sample matrix for IDA diagnosis. However, conventional Fe analysis techniques often necessitate complex and costly instrumentation. This study presents the first non-invasive, saliva-based preliminary screening test for IDA using a nitrocellulose lateral flow system. In this study, we introduce a novel approach using the ferroin reaction with bathophenanthroline (Bphen) and ferrous (Fe2+) ions to quantify Fe levels in saliva. Our methodology involves a capillary flow-driven microfluidic device integrated into a lateral flow system utilizing nitrocellulose membranes. Here, we present the first instance of saliva on a nitrocellulose substrate to detect salivary Fe levels. The optimized system yielded a linear response over the 1-200 ppm range in buffer solution, with a limit of detection (LoD) of 5.6 ppm. Furthermore, the system demonstrated a linear response in pooled saliva samples across the 1-1000 ppm range, with a LoD of 55.1 ppm. These results underscore the potential of our capillary flow-driven microfluidic device as a viable non-invasive diagnostic tool for IDA, particularly in remote and resource-limited settings.
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Affiliation(s)
- Chirapha Prakobdi
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Thaisa A Baldo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
| | - Prakash Aryal
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
| | - Jeremy Link
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
| | - Phoonthawee Saetear
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Charles S Henry
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
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3
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Prakobdi C, Nacapricha D, Bunchuay T, Saetear P. Exploitations of Schiff's test and iodoform test for an effective quality assessment of alcohol-based hand sanitizers. Spectrochim Acta A Mol Biomol Spectrosc 2023; 302:123076. [PMID: 37392537 PMCID: PMC10299952 DOI: 10.1016/j.saa.2023.123076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/22/2023] [Accepted: 06/24/2023] [Indexed: 07/03/2023]
Abstract
In the period of the corona virus disease 2019 (COVID-19) outbreak, an alcohol-based hand sanitizer is one of the most in-demand products for disinfection purposes. Two major concerns are adulteration of methanol, which causes toxicity to human health, and the concentration of legal alcohol in hand sanitizers due to their effect on antivirus. In this work, the first report of the entire quality assessment of alcohol-based hand sanitizers in terms of detection of methanol adulteration and quantification of ethanol is presented. Detection of adulterated methanol is carried out based on Schiff's reagent after the oxidation of methanol to formaldehyde, giving a bluish-purple solution to detect at 591 nm. In cases where a colorless solution is observed, an iodoform reaction with turbidimetric detection is then performed for quantitative analysis of legal alcohol (ethanol or isopropanol). To comply with the regulation of quality assessment of alcohol-based hand sanitizers, a regulation chart with four safety zones is also presented, employing a combination of two developed tests. The coordinates of a point (x, y) obtained from the two tests are extrapolated to the safety zone in the regulation chart. The regulation chart also showed consistency of analytical results as compared with the gas chromatography-flame ionization detector.
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Affiliation(s)
- Chirapha Prakobdi
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Thanthapatra Bunchuay
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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4
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Teerasong S, Boonyaratsewee P, Aunruan P, Saard W, Saetear P. A rapid cotton swab for on-site screening of coloring curcumin on durian skin: food safety aspects. ANAL SCI 2023:10.1007/s44211-023-00349-x. [PMID: 37101098 DOI: 10.1007/s44211-023-00349-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023]
Abstract
Exported durians from Thailand are sometimes immersed in curcumin to give the fruits a good appearance. Curcumin is regarded as non-toxic additive, however some importing countries prohibited use of any additive to fresh fruits and vegetables. This work aims to develop a rapid, low cost and convenient cotton swab device for curcumin detection. The detection principle involves a colorimetric acid-base characteristic of curcumin. Curcumin in an acidic/neutral solution presents a bright yellow color, while it displays an intense orange-red color in basic solution. A cotton swab acted for both sample collection and as a sensing platform. A pre-moistened swab was used to wipe a durian surface. Afterward, a NaOH solution was dropped onto the swab. A distinct orange-red color appearing on the swab indicates the presence of curcumin. The cotton swab was applied for qualitative analysis of curcumin contaminated on durian husks via visual detection. The developed device provided good reliability, 93.75% (36 samples). Furthermore, the device was demonstrated for quantitative determination using camera detection. Two linear calibrations were obtained in ranges of 10-75 and 75-250 mg L-1, with a detection limit of 3.2 mg L-1. The method was also successfully applied to quantification of curcumin in durians (three samples) and dietary supplements (two samples). The test can be done in a few minutes. The developed device was established as an useful tool for food safety and control of contamination by curcumin in an on-site application.
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Affiliation(s)
- Saowapak Teerasong
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand.
- Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Bangkok, Thailand.
| | - Phanaporn Boonyaratsewee
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
| | - Panuwat Aunruan
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
| | - Worawan Saard
- Department of Chemistry and Applied Analytical Chemistry Research Unit, School of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Bangkok, Thailand
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
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5
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Danchana K, Iwasaki H, Thayawutthikun Y, Saetear P, Kaneta T. Development of Pipetteless Paper-Based Analytical Devices with a Volume Gauge. ACS Omega 2023; 8:11213-11219. [PMID: 37008150 PMCID: PMC10061644 DOI: 10.1021/acsomega.2c08138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/06/2023] [Indexed: 06/19/2023]
Abstract
In this work, we propose a new design for paper-based analytical devices (PADs) that eliminate the need to use a micropipette for sample introduction. With this design, a PAD is equipped with a distance-based detection channel that is connected to a storage channel that indicates the volume of a sample introduced into the PAD. The analyte in the sample solution reacts with a colorimetric reagent deposited into the distance-based detection channel as the sample solution flows into the storage channel where the volume is measured. The ratio of the lengths of the detection channel and that of the storage channel (D/S ratio) are constant for a sample containing a certain concentration, which is independent of the introduced volume. Therefore, the PADs permit volume-independent quantification using a dropper instead of a micropipette because the length of the storage channel plays the role of a volume gauge to estimate the introduced sample volume. In this study, the D/S ratios obtained with a dropper were comparable to those obtained with a micropipette, which confirmed that precise volume control is unnecessary for this PAD system. The proposed PADs were applied to the determinations of iron and bovine serum albumin using bathophenanthroline and tetrabromophenol blue as colorimetric reagents, respectively. The calibration curves showed good linear relationships with coefficients of 0.989 for iron and 0.994 for bovine serum albumin, respectively.
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Affiliation(s)
- Kaewta Danchana
- Department
of Chemistry, Okayama University, Okayama 700-8530, Japan
| | - Hiroshi Iwasaki
- Department
of Chemistry, Okayama University, Okayama 700-8530, Japan
| | - Yada Thayawutthikun
- Flow
Innovation-Research for Science and Technology Laboratories (FIRST
Labs), Mahidol University, Bangkok 10400, Thailand
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Flow
Innovation-Research for Science and Technology Laboratories (FIRST
Labs), Mahidol University, Bangkok 10400, Thailand
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok 10400, Thailand
| | - Takashi Kaneta
- Department
of Chemistry, Okayama University, Okayama 700-8530, Japan
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6
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Nantapon T, Naweephattana P, Surawatanawong P, Saetear P, Chantarojsiri T, Ruangsupapichat N. Amino-coumarin-based colorimetric and fluorescent chemosensors capable of discriminating Co 2+, Ni 2+, and Cu 2+ ions in solution and potential utilization as a paper-based device. Spectrochim Acta A Mol Biomol Spectrosc 2022; 282:121662. [PMID: 35905612 DOI: 10.1016/j.saa.2022.121662] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/08/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
New chemosensors, L1-L3, based on the coumarin Schiff base scaffold with substituent modifications, have been designed and synthesized. The chemosensors L1-L3 exhibited the absorbance and fluorescence spectral changes that can discriminate Co2+, Ni2+, and Cu2+ ions. Sensor L1 demonstrated the ability to respond to Co2+, Ni2+, and Cu2+ ions. Remarkably, the slight modification of substituent on L2 has been observed to cause selective binding to Ni2+ and Cu2+ ions while L3 can specifically detect Cu2+ ions. The in-situ formation of metal and ligand complexes was determined by Job's plot analysis. The limit of detection and the sensing ability of all probes are estimated to be within the range of safe drinking water. Incorporation of the sensing compounds into a paper-based detection system using a laminated paper-based analytical device (LPAD) was demonstrated and found to be consistent to those obtained from the batchwise solution measurements.
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Affiliation(s)
- Thanayada Nantapon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Phiphob Naweephattana
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand
| | - Teera Chantarojsiri
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Nopporn Ruangsupapichat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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7
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Sirivibulkovit K, Wilairat P, Nacapricha D, Wichit S, Saetear P. A simple cost-effective paper-based electrochemical device for detection of adulterated sibutramine in slimming products. Anal Methods 2022; 14:2461-2470. [PMID: 35713109 DOI: 10.1039/d2ay00585a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This work presents the first paper-based electrochemical device, or ePAD, for direct detection of adulterated sibutramine in slimming products. The ePAD was fabricated using a screen-printing technique for defining the hydrophilic area for sample loading and for the working, reference and counter electrodes. The ePAD gave reproducible responses comparable to both conventional rod electrodes and commercial screen-printed electrodes (SPEs). Use of paper to fabricate the ePAD device provides advantages over the conventional SPE platforms (e.g. glass, ceramics and polymers) in terms of biocompatibility, strong capillary action and environmental friendliness. To detect sibutramine, square wave voltammetry was employed after sample loading on the circular hydrophilic area. The linear range is 2.51 to 83.7 mg L-1 sibutramine, with a precision of 6 %RSD (n = 3) and an instrumental limit of detection (3SD of intercept/slope) of 2.46 mg L-1 sibutramine. Recovery of spiked samples ranged from 83 to 116%. The samples were capsules, slimming coffee powders and nutraceutical beverages. The samples were appropriately diluted to give concentrations within the linear calibration range. Filtration of undissolved solids found with the capsules and coffee powder samples was not required, demonstrating that the method is not susceptible to solid particles. The ePAD is cost-effective (<US$1 per device) and suitable for on-site analysis.
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Affiliation(s)
- Kitima Sirivibulkovit
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs), Thailand.
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Prapin Wilairat
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs), Thailand.
- Analytical Sciences and National Doping Test Institute, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs), Thailand.
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Sineewanlaya Wichit
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs), Thailand.
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok, 10400, Thailand
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8
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Prasertying P, Ninlapath T, Jantawong N, Wongpakdee T, Sonsa-Ard T, Uraisin K, Saetear P, Wilairat P, Nacapricha D. Disposable Microchamber with a Microfluidic Paper-Based Lid for Generation and Membrane Separation of SO 2 Gas Employing an In Situ Electrochemical Gas Sensor for Quantifying Sulfite in Wine. Anal Chem 2022; 94:7892-7900. [PMID: 35609256 DOI: 10.1021/acs.analchem.2c00496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work presents a fully disposable microchamber for gas generation of a sample solution. The microchamber consists of a cylindrical well-reactor and a paper-based microfluidic lid (μFluidic lid), which also serves as the reagent loading and dispensing unit. The base of the reactor consists of a hydrophobic membrane covering an in-house graphene electrochemical gas sensor. Fabrication of the gas sensor and the three-layer μFluidic lid is described. The μFluidic lid is designed to provide a steady addition of the acid reagent into the sample solution instead of liquid drops from a disposable syringe. There are three steps in the procedure: (i) acidification of the sample in the reactor to generate SO2 gas by the slow dispensing of the acid reagent from the μFluidic lid, (ii) diffusion of the liberated SO2 gas through the hydrophobic membrane at the base of the reactor, and (iii) in situ detection of SO2 by cathodic reduction at the graphene electrode. The device was demonstrated for quantitation of the sulfite preservative in wine without heating or stirring. The selectivity of the analysis is ensured by the combination of the gas-diffusion membrane and the selectivity of the electrochemical sensor. The linear working range is 2-60 mg L-1 SO2, with a limit of detection (3SD of intercept/slope) of 1.5 mg L-1 SO2. This in situ method has the shortest analysis time (8 min per sample) among all voltammetric methods that detect SO2(g) via membrane gas diffusion.
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Affiliation(s)
- Paithoon Prasertying
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Thita Ninlapath
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Nanthatchaphon Jantawong
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Thinnapong Wongpakdee
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Thitaporn Sonsa-Ard
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Kanchana Uraisin
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Prapin Wilairat
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
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9
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Pananusorn P, Ruengsuk A, Docker A, Khamphaijun K, Sirivibulkovit K, Sukwattanasinitt M, Tantirungrotechai J, Saetear P, Limpanuparb T, Bunchuay T. Selective Extraction, Recovery, and Sensing of Hydroquinone Mediated by a Supramolecular Pillar[5]quinone Quinhydrone Charge-Transfer Complex. ACS Appl Mater Interfaces 2022; 14:6810-6817. [PMID: 35094511 DOI: 10.1021/acsami.1c22583] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Intermolecular interactions between an electron-rich aromatic hydroquinone (HQ) with its electron deficient counterpart, benzoquinone (BQ), result in the formation of a quinhydrone charge-transfer complex. Herein, we report a novel quinhydrone-type complex between pillar[5]quinone (P[5]Q) and HQ. Characterized by a suite of spectroscopic techniques including 1H NMR, UV-visible, and FTIR together with PXRD, SEM, BET, CV, and DFT modeling studies, the stability of the complex is determined to be due to an electron-proton transfer reaction coupled with a complementary donor-acceptor interaction. The selectivity of P[5]Q toward HQ over other dihydroxybenzene isomers allows for not only the naked-eye detection of HQ but also its selective liquid-liquid extraction and recovery from aqueous media.
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Affiliation(s)
- Puttipong Pananusorn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Araya Ruengsuk
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Andrew Docker
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Korawit Khamphaijun
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Kitima Sirivibulkovit
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | | | - Jonggol Tantirungrotechai
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Taweetham Limpanuparb
- Science Division, Mahidol University International College, Mahidol University, Salaya 73170, Thailand
| | - Thanthapatra Bunchuay
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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10
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Wongpakdee T, Buking S, Ratanawimarnwong N, Saetear P, Uraisin K, Wilairat P, Tiyapongpattana W, Nacapricha D. Simple gunshot residue analyses for estimating firing distance: Investigation with four types of fabrics. Forensic Sci Int 2021; 329:111084. [PMID: 34752997 DOI: 10.1016/j.forsciint.2021.111084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/23/2021] [Accepted: 10/25/2021] [Indexed: 10/20/2022]
Abstract
This work presents two simple methods for estimating the firing distance from the gunshot residues (GSRs) on fabric targets. Four types of fabric targets, namely twill weave denim cotton-polyester (80/20), jersey knitting 100% cotton, plain weave cotton-polyester (80/20) and plain weave cotton-polyester (60/40), were employed. The firing tests were carried out using these white fabrics as targets at distances of 5-100 cm, respectively. In the first method, digital images of the black GSRs on fabric materials were recorded inside an illuminated box and the inverted gray intensity values were plotted against the firing distances. Since the plots of all fabrics are not significantly different, the estimation of firing distance employs the same exponential curve for all test fabrics. Although simple, the imaging method is not suitable for dark-colored materials. A chemical-based method was therefore developed as an alternative method. In the second method, a small disposable microfluidic paper-based analytical device (μPAD) was employed for detecting Pb(II) extracted from the GSRs. The μPAD method uses the measurement of the length of a narrow band of a pink color resulting from reaction between rhodizonate reagent and the Pb(II) extract. The plots indicated that the data of thick denim material are significantly different to other test fabrics which are much thinner. These three fabrics share the same estimation curve. However, it is recommended that the separate estimation curve for denim materials must be used. Both methods are suitable for short range firing distance, no further than 60 cm, since at greater distances the inverted gray intensity and the 'band-length' methods are unable to detect the GSRs.
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Affiliation(s)
- Thinnapong Wongpakdee
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Supatana Buking
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Office of Police Forensic Science, Bangkok 10330, Thailand
| | - Nuanlaor Ratanawimarnwong
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumvit 23, Bangkok 10110, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Kanchana Uraisin
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Prapin Wilairat
- Analytical Sciences and National Doping Test Institute, Mahidol University, Rama VI Rd., Bangkok 10400, Thailand
| | - Warawut Tiyapongpattana
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani 12121, Thailand.
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.
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11
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Noirahaeng N, Uraisin K, Wattanasin P, Saetear P. Simplified Fabrication of Laminated Paper-Based Analytical Device (LPAD) with Color-Palette Mobile App for Analysis of Salicylic Acid in Pharmaceutical Products. ANAL SCI 2021; 38:533-540. [PMID: 35359271 DOI: 10.2116/analsci.21p231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 10/14/2021] [Indexed: 11/23/2022]
Abstract
In this work, we present for the first time, a simplified fabrication of a laminated paper-based analytical device (LPAD) with a free-mobile app, Palette Cam, for image analysis. A filter paper is cut in a rectangular shape (9 × 3 cm) and placed between a top laminating sheet with punched holes and a bottom laminating sheet. The holes allow accessibility of liquid on the paper. Thermal lamination is then employed to complete the fabrication of LPAD. Our simplified design reduces a tedious alignment of small pieces of paper to the holes. We demonstrated the LPAD with an analysis of salicylic acid in pharmaceutical products. Each 4 μL of ferric reagent and sample was dispensed on the LPAD. Smartphone was used to capture images. The RGB (red green blue) color intensity from the Palette Cam was converted into a logarithm color ratio. Our LPAD is simplified, cost-effective and able to be a portable device.
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Affiliation(s)
- Nakarin Noirahaeng
- Flow-Innovation Research for Science and Technology Laboratories (Firstlabs).,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University
| | - Kanchana Uraisin
- Flow-Innovation Research for Science and Technology Laboratories (Firstlabs).,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University
| | - Panwadee Wattanasin
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University.,Division of Physical Science, Faculty of Science, Prince of Songkla University
| | - Phoonthawee Saetear
- Flow-Innovation Research for Science and Technology Laboratories (Firstlabs).,Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University
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12
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Ayuning Tyas A, Sonsa-ard T, Uraisin K, Nacapricha D, Saetear P. Simple Flow-Based System with an In-Line Membrane Gas-liquid Separation Unit and a Contactless Conductivity Detector for the Direct Determination of Sulfite in Clear and Turbid Food Samples. Membranes (Basel) 2020; 10:membranes10050104. [PMID: 32443480 PMCID: PMC7281478 DOI: 10.3390/membranes10050104] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/11/2020] [Accepted: 05/14/2020] [Indexed: 11/17/2022]
Abstract
This study presents a simple flow-based system for the determination of the preservative agent sulfite in food and beverages. The standard method of conversion of sulfite ions into SO2 gas by acidification is employed to separate the sulfite from sample matrices. The sample is aspirated into a donor stream of sulfuric acid. A membrane gas–liquid separation unit, also called a ‘gas-diffusion (GD)’ unit, incorporating a polytetrafluoroethylene (PTFE) hydrophobic membrane allows the generated gas to diffuse into a stream of deionized water in the acceptor line. The dissolution of the SO2 gas leads to a change in the conductivity of water which is monitored by an in-line capacitively coupled contactless conductivity detector (C4D). The conductivity change is proportional to the concentration of sulfite in the sample. In this work, both clear (wine) and turbid (fruit juice and extracts of dried fruit) were selected to demonstrate the versatility of the developed method. The method can tolerate turbidity up to 60 Nephelometric Turbidity Units (NTUs). The linear range is 5–25 mg L−1 SO32− with precision <2% RSD. The flow system employs a peristaltic pump for propelling all liquid lines. Quantitative results of sulfite were statistically comparable to those obtained from iodimetric titration for the wine samples.
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13
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Wichit S, Hamel R, Yainoy S, Gumpangseth N, Panich S, Phuadraksa T, Saetear P, Monteil A, Morales Vargas R, Missé D. Interferon-inducible protein (IFI) 16 regulates Chikungunya and Zika virus infection in human skin fibroblasts. EXCLI J 2019; 18:467-476. [PMID: 31423125 PMCID: PMC6694701 DOI: 10.17179/excli2019-1271] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/25/2019] [Indexed: 12/12/2022]
Abstract
Chikungunya virus (CHIKV), a re-emerging infectious arbovirus, causes Chikungunya fever that is characterized by fever, skin rash, joint pain, arthralgia and occasionally death. Despite it has been described for 66 years already, neither potential vaccine nor a specific drug is available yet. During CHIKV infection, interferon type I signaling pathway is stimulated and releases hundreds of interferon stimulated genes (ISGs). Our previous study reported that IFI16, a member of ISGs, is up-regulated during CHIKV virus infection and the suppression of the gene resulted in increased virus replication. Furthermore, our group also found that inflammasome activation can inhibit CHIKV infection in human foreskin cells (HFF1). Concomitantly, it has been reported that IFI16 activates the inflammasome to suppress virus infection. Therefore, we have hypothesized that IFI16 could be involved in CHIKV infection. In this study, we confirmed the expression level of IFI16 by Western blotting analysis and found that IFI16 was up-regulated following CHIKV infection in both HFF1 and human embryonic kidney cells. We next investigated its antiviral activity and found that forced expression of IFI16 completely restricted CHIKV infection while endogenous silencing of the gene markedly increased virus replication. Furthermore, we have discovered that IFI16 inhibited CHIKV replication, at least, in cell-to-cell transmission as well as the diffusion step. Interestingly, IFI16 also exerted its antiviral activity against Zika virus (ZIKV) infection, the global threat re-emerging virus can cause microcephaly in humans. Taken together, this study provides the first evidence of an antivirus activity of IFI16 during in vitro arbovirus infection, thus expanding its antiviral spectrum that paves the way to further development of antiviral drugs and vaccines.
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Affiliation(s)
- Sineewanlaya Wichit
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Rodolphe Hamel
- Laboratoire MIVEGEC, IRD-CNRS-University of Montpellier, 34000, Montpellier, France.,Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Sakda Yainoy
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Nuttamonpat Gumpangseth
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Suchawadee Panich
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Thanawat Phuadraksa
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Phoonthawee Saetear
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Arnaud Monteil
- Plateforme de Vectorologie, BioCampus, Univ. Montpellier, CNRS, INSERM, 34094, Montpellier, France
| | - Ronald Morales Vargas
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Dorothée Missé
- Laboratoire MIVEGEC, IRD-CNRS-University of Montpellier, 34000, Montpellier, France
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14
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Leclercq L, Saetear P, Rolland-Sabaté A, Biron JP, Chamieh J, Cipelletti L, Bornhop DJ, Cottet H. Size-Based Characterization of Polysaccharides by Taylor Dispersion Analysis with Photochemical Oxidation or Backscattering Interferometry Detections. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00605] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Laurent Leclercq
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Phoonthawee Saetear
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
- Department of Chemistry and the Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok 10400, Thailand
| | - Agnès Rolland-Sabaté
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
- UMR0408 Sécurité et Qualité des Produits d’Origine Végétale, INRA, Université Avignon, F-84000 Avignon, France
| | | | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Luca Cipelletti
- L2C, Université de Montpellier, CNRS, Montpellier 34095, France
| | | | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
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15
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Suwanrut J, Chantipmanee N, Kamsong W, Buking S, Mantim T, Saetear P, Nacapricha D. Temperature-dependent schlieren effect in liquid flow for chemical analysis. Talanta 2018; 188:74-80. [PMID: 30029441 DOI: 10.1016/j.talanta.2018.05.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 05/10/2018] [Accepted: 05/16/2018] [Indexed: 11/17/2022]
Abstract
In flow analysis, such as flow injection analysis, liquid lens is formed at the boundary between two adjacent liquid media which have different refractive indices. Light refraction at the liquid interface gives the so-called 'schlieren signal'. Schlieren effect is both concentration-dependent and temperature-dependent. In this work, the schlieren signal from temperature difference was quantitatively investigated for application in enthalpimetric measurement. The schlieren phenomena was then exploited for chemical analysis. A thermal insulated single flow line manifold was constructed using deionized water at 23 °C as the carrier. Deionized water at various temperatures in the range of 5-85 °C was injected into the carrier flow. A correlation between the schlieren signal and sample temperature was observed. A heat exchanger unit (HEU), consisting of a small volume glass-reaction chamber with a surrounding water jacket, was constructed. The unit was thermally insulated in a double layer cylindrical PVC unit. For demonstrating the applicability of temperature-dependent schlieren effect in chemical analysis, the exothermic oxidation reaction between acid dichromate and ethanol or ascorbic acid was employed with heat transferring to the surrounding water layer. When an aliquot of water from the HEU is injected into the constant temperature flow line the observed schlieren signal was dependent on the analyte concentration. Linear calibration (r2 > 0.99) were obtained covering the concentration range of ethanol and ascorbic acid as found in samples. The developed flow system provides good precision (RSD < 5%) with sample throughput of 4 sample h-1. The system were applied to the determination of ethanol in Thai white spirit and ascorbic acid in vitamin C tablets, respectively. The quantitative results obtained from the schlieren method were in agreement with the comparative methods.
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Affiliation(s)
- Jintana Suwanrut
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand.
| | - Nattapong Chantipmanee
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Wichayaporn Kamsong
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Supatana Buking
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Thitirat Mantim
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (FIRSTLabs), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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16
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Retzlaff CL, Kussrow A, Schorkopf T, Saetear P, Bornhop DJ, Hardaway JA, Sturgeon SM, Wright J, Blakely RD. Metallo-β-lactamase Domain-Containing Protein 1 (MBLAC1) Is a Specific, High-Affinity Target for the Glutamate Transporter Inducer Ceftriaxone. ACS Chem Neurosci 2017; 8:2132-2138. [PMID: 28783953 DOI: 10.1021/acschemneuro.7b00232] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Ceftriaxone, a β-lactam antibiotic, has been reported to act independently of its antimicrobial actions to normalize perturbed central nervous system glutamate levels, principally by elevating expression of glial glutamate transporters. Identification of a specific, high-affinity target for ceftriaxone could significantly impact therapeutic development for multiple brain disorders, ranging from neurodegenerative disorders to addiction. Recently, we identified a glial-expressed Caenorhabditis elegans gene, swip-10, that encodes a metallo-β-lactamase domain-containing protein, and limits glutamate-dependent changes in dopamine neuron excitability. Bioinformatic analyses identified MBLAC1 as the likely mammalian orthologue of swip-10. Using cyanogen bromide immobilized ceftriaxone for affinity capture experiments and backscattering interferometry to monitor MBLAC1 binding of unmodified ceftriaxone, we obtained evidence for specific, high affinity (KD = 2.2 μM) binding of ceftriaxone to MBLAC1. We discuss our findings with respect to MBLAC1 as a potentially exclusive, high-affinity binding partner of ceftriaxone in the CNS, and the path forward in the development of novel, MBLAC1-based therapeutics.
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Affiliation(s)
- Cassandra L. Retzlaff
- Department
of Biomedical Science and Brain Institute, Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, Florida 33458, United States
| | | | | | | | | | | | | | | | - Randy D. Blakely
- Department
of Biomedical Science and Brain Institute, Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, Florida 33458, United States
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17
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Saetear P, Chamieh J, Kammer MN, Manuel TJ, Biron JP, Bornhop DJ, Cottet H. Taylor Dispersion Analysis of Polysaccharides Using Backscattering Interferometry. Anal Chem 2017; 89:6710-6718. [DOI: 10.1021/acs.analchem.7b00946] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | - Joseph Chamieh
- IBMM, Univ. Montpellier,
CNRS, ENSCM, Montpellier, France
| | - Michael N. Kammer
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- The
Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Thomas J. Manuel
- Department
of Agricultural and Biological Engineering, Mississippi State University, Starkville, Mississippi 39762, United States
| | | | - Darryl J. Bornhop
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- The
Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Hervé Cottet
- IBMM, Univ. Montpellier,
CNRS, ENSCM, Montpellier, France
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18
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Saetear P, Perrin AJ, Bartholdson SJ, Wanaguru M, Kussrow A, Bornhop DJ, Wright GJ. Quantification of Plasmodium-host protein interactions on intact, unmodified erythrocytes by back-scattering interferometry. Malar J 2015; 14:88. [PMID: 25889240 PMCID: PMC4349660 DOI: 10.1186/s12936-015-0553-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 01/06/2015] [Indexed: 11/17/2022] Open
Abstract
Background Invasion of host erythrocytes by Plasmodium falciparum is central to the pathogenesis of malaria. Invasion involves recognition events between erythrocyte receptors and ligands on the merozoite, the invasive blood form of the parasite. Identifying and characterizing host-parasite interactions is impeded by the biochemical challenges of working with membrane-embedded glycoprotein receptors. For example, the interaction between P. falciparum erythrocyte binding antigen 175 (PfEBA175) and glycophorin A (GYPA) depends on post-translational modifications that are not easily added in recombinant expression systems, and the use of native GYPA is limited by the hydrophobic transmembrane region, making it difficult to biochemically manipulate. It would, therefore, be desirable to perform quantitative binding assays with receptors embedded within the membranes of intact human erythrocytes. Methods The extracellular region of GYPA was over-expressed as a soluble protein in HEK293E cells. This protein was characterized, sialylated and evaluated for binding to the PfEBA175 protein. The label-free and free-solution assay, backscattering interferometry (BSI), was used to perform binding assays of two well-characterized P. falciparum invasion ligands to intact unmodified human erythrocytes. Results Findings indicate that the post-translational modifications present on native GYPA are required for it to bind recombinant PfEBA175 and that these modifications cannot be recapitulated in vitro using mammalian overexpression methods. Here, BSI was used to obtain quantitative, high fidelity interaction determinations on intact, unmodified erythrocytes. Using BSI and purified recombinant proteins constituting the entire ectodomains of the P. falciparum merozoite ligands PfEBA175 and PfRH5, KDs of 1.1 μM and 50 nM were measured for the PfRH5-BSG and PfEBA175-GYPA interactions, respectively, in good agreement with previous biophysical measurements of these interactions. Conclusions These results demonstrate that BSI can be used to detect and quantify the interactions of two merozoite invasion ligands with their receptors on intact human erythrocytes. BSI assays were performed on unlabelled, free-solution proteins in their native environment, requiring only nanomoles of recombinant protein. This study suggests that BSI can be used to investigate host-parasite protein interactions without the limitations of other assay platforms, and therefore represents a valuable new method to investigate the molecular mechanisms involved in erythrocyte invasion by P. falciparum.
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Affiliation(s)
- Phoonthawee Saetear
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand.
| | - Abigail J Perrin
- Cell Surface Signalling Laboratory and Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK.
| | - S Josefin Bartholdson
- Cell Surface Signalling Laboratory and Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK.
| | - Madushi Wanaguru
- Cell Surface Signalling Laboratory and Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK.
| | - Amanda Kussrow
- Department of Chemistry and the Vanderbilt Institute for Chemical Biology, Vanderbilt University, 4226 Stevenson Center, Nashville, Tennessee, 37235, USA.
| | - Darryl J Bornhop
- Department of Chemistry and the Vanderbilt Institute for Chemical Biology, Vanderbilt University, 4226 Stevenson Center, Nashville, Tennessee, 37235, USA.
| | - Gavin J Wright
- Cell Surface Signalling Laboratory and Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, UK.
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Wattanasin P, Saetear P, Wilairat P, Nacapricha D, Teerasong S. Zone fluidics for measurement of octanol-water partition coefficient of drugs. Anal Chim Acta 2014; 860:1-7. [PMID: 25682240 DOI: 10.1016/j.aca.2014.08.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/08/2014] [Accepted: 08/12/2014] [Indexed: 11/30/2022]
Abstract
A novel zone fluidics (ZF) system for the determination of the octanol-water partition coefficient (Pow) of drugs was developed. The ZF system consisted of a syringe pump with a selection valve, a holding column, a silica capillary flow-cell and an in-line spectrophotometer. Exact microliter volumes of solvents (octanol and phosphate buffer saline) and a solution of the drug, sandwiched between air segments, were sequentially loaded into the vertically aligned holding column. Distribution of the drug between the aqueous and octanol phases occurred by the oscillation movement of the syringe pump piston. Phase separation occurred due to the difference in densities. The liquid zones were then pushed into the detection flow cell. In this method, absorbance measurements in only one of the phase (octanol or aqueous) were employed, which together with the volumes of the solvents and pure drug sample, allowed the calculation of the Pow. The developed system was applied to the determination of the Pow of some common drugs. The log (Pow) values agreed well with a batch method (R(2)=0.999) and literature (R(2)=0.997). Standard deviations for intra- and inter-day analyses were both less than 0.1log unit. This ZF system provides a robust and automated method for screening of Pow values in the drug discovery process.
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Affiliation(s)
- Panwadee Wattanasin
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs.), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs.), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Prapin Wilairat
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs.), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; National Doping Control Centre, Mahidol University, Bangkok 10400, Thailand
| | - Duangjai Nacapricha
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs.), Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Saowapak Teerasong
- Flow Innovation-Research for Science and Technology Laboratories (FIRST labs.), Thailand; Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
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20
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Sereenonchai K, Teerasong S, Chan-Eam S, Saetear P, Choengchan N, Uraisin K, Amornthammarong N, Motomizu S, Nacapricha D. A low-cost method for determination of calcium carbonate in cement by membraneless vaporization with capacitively coupled contactless conductivity detection. Talanta 2010; 81:1040-4. [DOI: 10.1016/j.talanta.2010.01.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Revised: 01/25/2010] [Accepted: 01/27/2010] [Indexed: 11/26/2022]
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21
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Sereenonchai K, Saetear P, Amornthammarong N, Uraisin K, Wilairat P, Motomizu S, Nacapricha D. Membraneless vaporization unit for direct analysis of solid sample. Anal Chim Acta 2007; 597:157-62. [PMID: 17658326 DOI: 10.1016/j.aca.2007.06.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 06/06/2007] [Accepted: 06/08/2007] [Indexed: 11/15/2022]
Abstract
A new apparatus, called 'membraneless vaporization' (MBL-VP) unit was designed and developed for direct analysis of solid samples. Solid analyte was converted into a gaseous form which then reacts with an indicator reagent. Change in absorbance was used to quantitate the analyte. Stirring with a magnetic bar was employed to facilitate the evaporation of the gas. Unlike the pervaporation technique, hydrophobic membrane was not required for this MBL-VP technique. Application of the membraneless technique for direct determination of calcium carbonate in calcium supplements, has shown to be very precise (R.S.D.=2.5% for 0.16 mmol CO3(2-)), with detection limit of 0.5 mg CaCO3. Results by this method agreed well with flame atomic absorption spectrometric method. Sample throughput was 20 samples h(-1).
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Affiliation(s)
- K Sereenonchai
- Flow Innovation-Research for Science and Technology Laboratories (First Labs), Department of Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
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