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Ni J, Zhang Q, Zhang X, Sun Z, Bao D. Detection Method and Common Characteristics of Waste Solvent from Semiconductor Industry. Molecules 2023; 28:5992. [PMID: 37630244 PMCID: PMC10458026 DOI: 10.3390/molecules28165992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
The recycling of organic solvents is a widely discussed topic. The waste organic solvents from thin-film-transistor liquid-crystal display (TFT-LCD) production is characterized by large quantities, multiple types, and complex compositions. Thus, the unified and compatible component analysis method is important for studying the recovery of waste organic solvents. In our work, based on the study of existing analytical methods, we designed a compatible method for the analysis of moisture using Karl Fischer analysis, for the analysis of organic compounds using gas chromatography, and for the analysis of the photoresist and other solids by evaporation. These were specific methods for analyzing the components of near-total formulation thin-film-transistor liquid-crystal display waste organic solvent. The organic matter content was analyzed via gas chromatography with a CP-Sil8CB column and flame ionization detector. The initial temperature of the column was 90 °C and the holding time was 1 min. The heating rate was 30 °C/min. The temperature was raised to 270 °C for 7 min. The internal standard method and the external standard method were used to determine the content of the main components of organic compounds. The relative standard deviation of the analytical results was 1.14~2.93%, 1.21~4.74% and 0.61%, respectively. The analytical results had good accuracy, but the external standard method was better; the recoveries were 99.76~107.60%, 95.86~107.70%, and 95.23~96.88%, respectively. Based on the composition analysis, the composition rule of the waste organic solvent was summarized. Through the exploration of the effect of the waste solvent, the common characteristics of the waste solvent were obtained. This study provides a good strategy and an optimized method for improving the efficiency of organic solvent recovery.
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Affiliation(s)
- Jinjuan Ni
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; (J.N.); (Z.S.); (D.B.)
| | - Qing Zhang
- CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
- School of Resource and Environmental Engineering, Anhui Water Resources Hydropower Technical College, Hefei 231603, China
| | - Xianglin Zhang
- School of Resource and Environmental Engineering, Anhui Water Resources Hydropower Technical College, Hefei 231603, China
| | - Zhilong Sun
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; (J.N.); (Z.S.); (D.B.)
| | - Dali Bao
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; (J.N.); (Z.S.); (D.B.)
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2
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Feng S, Xiang C, He Y, Li Z, Zhao Z, Liu B, Yin Z, He Q, Yang Y, Huang Z, Lin T, Li W, Duan Y. Assessment of an exhaled breath test using ultraviolet photoionization time-of-flight mass spectrometry for the monitoring of kidney transplant recipients. MOLECULAR BIOMEDICINE 2023; 4:19. [PMID: 37353649 DOI: 10.1186/s43556-023-00130-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 05/04/2023] [Indexed: 06/25/2023] Open
Abstract
Continuous monitoring for immunosuppressive status, infection and complications are a must for kidney transplantation (KTx) recipients. Traditional monitoring including blood sampling and kidney biopsy, which caused tremendous medical cost and trauma. Therefore, a cheaper and less invasive approach was urgently needed. We thought that a breath test has the potential to become a feasible tool for KTx monitoring. A prospective-specimen collection, retrospective-blinded assessment strategy was used in this study. Exhaled breath samples from 175 KTx recipients were collected in West China Hospital and tested by online ultraviolet photoionization time-of-flight mass spectrometry (UVP-TOF-MS). The classification models based on breath test performed well in classifying normal and abnormal values of creatinine, estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN) and tacrolimus, with AUC values of 0.889, 0.850, 0.849 and 0.889, respectively. Regression analysis also demonstrated the predictive ability of breath test for clinical creatinine, eGFR, BUN, tacrolimus level, as the predicted values obtained from the regression model correlated well with the clinical true values (p < 0.05). The findings of this investigation implied that a breath test by using UVP-TOF-MS for KTx recipient monitoring is possible and accurate, which might be useful for future clinical screenings.
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Affiliation(s)
- Shijian Feng
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Chengfang Xiang
- College of Chemistry, Sichuan University, Chengdu, 610064, People's Republic of China
| | - Yushi He
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Zhuoya Li
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Zhongjun Zhao
- School of Mechanical Engineering, Sichuan University, Chengdu, 610064, People's Republic of China
| | - Bohan Liu
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Zhaofa Yin
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Qiyu He
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Yanting Yang
- School of Mechanical Engineering, Sichuan University, Chengdu, 610064, People's Republic of China
| | - Zhongli Huang
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Tao Lin
- Department of Urology and Institute of Urology, Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Organ Transplantation Center, Chengdu, People's Republic of China
| | - Wenwen Li
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, People's Republic of China.
| | - Yixiang Duan
- School of Mechanical Engineering, Sichuan University, Chengdu, 610064, People's Republic of China.
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Bhadra S, Chan A, Hendry-Hofer TB, Boss GR, Bebarta VS, Logue BA. Analysis of bisaminotetrazole cobinamide, a next-generation antidote for cyanide, hydrogen sulfide and methanethiol poisoning, in swine plasma by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1208:123392. [PMID: 35952445 DOI: 10.1016/j.jchromb.2022.123392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 07/07/2022] [Accepted: 07/24/2022] [Indexed: 11/29/2022]
Abstract
Cyanide, hydrogen sulfide, and methanethiol are common toxic inhalation agents that inhibit mitochondrial cytochrome c oxidase and result in cellular hypoxia, cytotoxic anoxia, apnea, respiratory failure, cardiovascular collapse, seizure and potentially death. While all are occupational gas exposure hazards that have the potential to cause mass casualties from industrial accidents or acts of terrorism, only cyanide has approved antidotes, and each of these has major limitations, including difficult administration in mass-casualty settings. While bisaminotetrazole cobinamide (Cbi(AT)2) has recently gained attention because of its efficacy in treating these metabolic poisons, there is no method available for the analysis of Cbi(AT)2 in any biological matrix. Hence, in this study, a simple and rapid liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed and validated for the analysis of Cbi(AT)2 in swine plasma. The method is extremely simple, consisting of protein precipitation, separation and drying of the supernatant, reconstitution in an aqueous solvent, and LC-MS/MS analysis. The method produced an LOD of 0.3 μM with a wide dynamic range (2 - 500 μM). Inter- and intraassay accuracies (100 ± 12 % and 100 ± 19 %, respectively) were acceptable and the precision (<12 % and < 9 % relative standard deviation, respectively) was good. The developed method was used to analyze Cbi(AT)2 from treated swine and the preliminary pharmacokinetic parameters showed impressive antidotal behavior, most notably a long estimated elimination half-life (t1/2 = 37.5 h). This simple and rapid method can be used to facilitate the development of Cbi(AT)2 as a therapeutic against toxic cyanide, hydrogen sulfide and methanethiol exposure.
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Affiliation(s)
- Subrata Bhadra
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA
| | - Adriano Chan
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Tara B Hendry-Hofer
- Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Gerry R Boss
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Vikhyat S Bebarta
- Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Brian A Logue
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA.
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A highly selective optical sensor for the detection of cyanide ions in aqueous solution and living cells. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113651] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Donkor AB, White CW, Nick HJ, Logue BA. Analysis of sodium 2-mercaptoethane sulfonate in rat plasma using high performance liquid chromatography tandem-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1189:123088. [PMID: 34974317 PMCID: PMC8792353 DOI: 10.1016/j.jchromb.2021.123088] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 01/17/2023]
Abstract
Sodium 2-mercaptoethane sulfonate (MESNA) is a thiol-containing compound that has proven to be effective in inactivating acrolein, the toxic metabolite of some anti-cancer drugs (e.g., cyclophosphamide and ifosphamide). Also, it scavenges free radicals which cause numerous disorders by attacking biological molecules. Current methods available to analyze MESNA in biological matrices include colorimetry and high-performance liquid chromatography (HPLC) with ultraviolet, fluorescence, or electrochemical detection. These methods have several limitations including low sensitivity, poor selectivity, a high degree of difficulty, and long analysis times. Hence, a rapid, simple, and sensitive HPLC tandem mass spectrometry (MS/MS) method was developed and validated to quantify MESNA in rat plasma following IP administration. The analysis of MESNA was accomplished via plasma protein precipitation, centrifugation, supernatant evaporation, reconstitution, and HPLC-MS/MS analysis. The method showcases an outstanding limit of detection (20 nM), excellent linearity (R2 = 0.999, and percent residual accuracy >90%) and a wide linear range (0.05-200 μM). The method also produced good accuracy and precision (100 ± 10% and <10% relative standard deviation, respectively). The validated method was successfully used to analyze MESNA from treated animals and will allow easier development of MESNA for therapeutic purposes.
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Affiliation(s)
- Abigail B. Donkor
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, South Dakota, 57007, USA
| | - Carl W. White
- Pediatrics-Pulmonary Medicine, University of Colorado-Denver, Denver, CO, 80045, USA
| | - Heidi J. Nick
- Pediatrics-Pulmonary Medicine, University of Colorado-Denver, Denver, CO, 80045, USA
| | - Brian A. Logue
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, South Dakota, 57007, USA,Author to whom all correspondence and reprint requests should be addressed.
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Zhou J, Zhu X, Dong Y, Yang B, Lu R, Xing G, Wang S, Li F. Type 2 diabetes mellitus potentiates acute acrylonitrile toxicity: Potentiation reduction by phenethyl isothiocyanate. Toxicol Ind Health 2021; 37:695-704. [PMID: 34643460 DOI: 10.1177/07482337211048583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Acrylonitrile (AN) is a known animal carcinogen and suspected human carcinogen. Recently, occupational exposure to AN has considerably increased. Previously, we demonstrated that streptozotocin-induced diabetes potentiates AN-induced acute toxicity in rats and that the induced cytochrome P450 2E1 (CYP2E1) is responsible for this effect. In the present study, we examined whether induction of CYP2E1 is also the underlying mechanism for the potentiation of AN-induced acute toxicity in type 2 diabetes in db/db mice. The effect of phenethyl isothiocyanate (PEITC) in reducing potentiation was also investigated. The mice were randomly divided into the normal control, diabetic control, AN, diabetes + AN, PEITC + AN, and diabetes + PEITC + AN groups. PEITC (40 mg/kg) was orally administered to rats for 3 days, and 1 h after the last PEITC gavage, 45 mg/kg AN was intraperitoneally injected. Time to death was observed. The CYP2E1 level and enzymatic activity, cytochrome c oxidase (CCO) activity, and reactive oxygen species (ROS) levels were measured. The survival rate was decreased in AN-treated db/db mice compared with that in AN-treated wild-type mice. The hepatic CYP2E1 level and enzymatic activity remained unaltered in db/db mice. Phenethyl isothiocyanate alleviated AN-induced acute toxicity in db/db mice as evident in the increased survival rate, restored CCO activity, and decreased ROS level in both the liver and brain. The study results suggested that CYP2E1 may not be responsible for the sensitivity to AN-induced acute toxicity in db/db mice and that PEITC reduced the potentiation of AN-induced acute toxicity in db/db mice.
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Affiliation(s)
- Jie Zhou
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xueyu Zhu
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Ying Dong
- Department of Clinical Laboratory, Rugao Municipal People's Hospital, Rugao, Jiangsu, China
| | - Bobo Yang
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Rongzhu Lu
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Guangwei Xing
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Suhua Wang
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
| | - Fang Li
- School of Medicine, 12676Jiangsu University, Zhenjiang, Jiangsu, China
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Low Quantity but Critical Contribution to Flavor: Review of The Current Understanding of Volatile Sulfur-containing Compounds in Baijiu. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.104079] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Lippner DS, Hildenberger DM, Rhoomes MO, Winborn JN, Dixon H, McDonough J, Rockwood GA. A novel aqueous dimethyl trisulfide formulation is effective at low doses against cyanide toxicity in non-anesthetized mice and rats. Clin Toxicol (Phila) 2021; 60:83-94. [PMID: 34219566 DOI: 10.1080/15563650.2021.1935991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Cyanide (CN) is a metabolic poison that is capable of intoxicating individuals through accidental or intentional means. With high concentration exposures, death can occur in minutes. In cases of mass casualty exposures, there is a need for a rapid-acting countermeasure capable of being administered in a short period of time in a pre-hospital setting to treat victims. OBJECTIVE These studies evaluate the safety and efficacy of a novel aqueous formulation of dimethyl trisulfide (DMTS) as an intramuscular (IM) CN countermeasure using non-anesthetized rodent models. METHODS Non-anesthetized rodents (mice and rats) were exposed to hydrogen cyanide (HCN) or potassium cyanide (KCN) along with immediate IM 10% DMTS treatment or vehicle treatment. Survival and other parameters, such as the time to recovery and assessment of clinical toxic signs (e.g., gasping, loss of righting reflex, convulsions, etc.), were quantified to determine the effectiveness of 10% DMTS treatment (12.5, 25, 75 mg/kg IM) compared to vehicle control treatment. A rat KCN delayed-treatment model with a 15-minute treatment delay was also utilized to simulate a real-life exposure/treatment scenario with 10% DMTS treatment. The stability of the 10% DMTS formulation was also assessed. RESULTS A 25 mg/kg IM dose of 10% DMTS exhibits potent efficacy against subcutaneous (SC) KCN challenge in both mice and rats and inhalational HCN exposure in mice. 10% DMTS treatment also shortens the time to recovery in rats using a delayed-treatment model. CONCLUSION IM treatment with 10% DMTS improves survival and clinical outcomes in non-anesthetized rodent models of acute CN toxicity. Additionally, the use of an SC KCN delayed-treatment model in rats is advised to assess the performance of a candidate CN countermeasure in a more realistic exposure/treatment scenario.
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Affiliation(s)
- D S Lippner
- Medical Toxicology Research Division, Biochemistry and Physiology Department, US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
| | - D M Hildenberger
- Medical Toxicology Research Division, Biochemistry and Physiology Department, US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
| | - M O Rhoomes
- Medical Toxicology Research Division, Biochemistry and Physiology Department, US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
| | - J N Winborn
- Medical Toxicology Research Division, Biochemistry and Physiology Department, US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
| | - H Dixon
- Southwest Research Institute, San Antonio, TX, USA
| | - J McDonough
- Southwest Research Institute, San Antonio, TX, USA
| | - G A Rockwood
- Medical Toxicology Research Division, Biochemistry and Physiology Department, US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD, USA
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Analysis of the Soil Fumigant, Dimethyl Disulfide, in Swine Blood by Dynamic Headspace Gas Chromatography-Mass Spectroscopy. J Chromatogr A 2020; 1638:461856. [PMID: 33485031 DOI: 10.1016/j.chroma.2020.461856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 02/03/2023]
Abstract
Plant parasites and soilborne pathogens directly reduce the overall yield of crops, vegetables, and fruits, negatively impacting the market demand for these products and their net profitability. While preplant soil fumigation helps maintain the consistent production quality of high-value cash crops, most soil fumigants are toxic to off-target species, including humans. Dimethyl disulfide (DMDS) has recently been introduced as a relatively low toxicity soil fumigant. Although DMDS exhibits low toxicity compared to other soil fumigants, it is volatile and exposure can cause eye, nasal, and upper respiratory tract irritation, skin irritation, nausea, dizziness, headache, and fatigue. While there is one analysis method available for DMDS from biological matrices, it has significant disadvantages. Hence, in this study, a dynamic headspace gas chromatography-mass spectroscopy (DHS-GC-MS) method was developed for the analysis of DMDS in swine whole blood. This method is highly sensitive and requires only three steps: 1) acid denaturation, 2) addition of internal standard, and 3) DHS-GC-MS analysis. The method produced a wide linear range from 0.1 - 200 µM with an excellent limit of detection of 30 nM. Intra- and interassay accuracy (100±14% and 100±11%, respectively) and precision (<5% and <6% relative standard deviation, respectively) were also excellent. The method worked well to quantify the DMDS levels in the blood of dimethyl trisulfide (DMTS)-treated swine (i.e., DMDS is a byproduct of DMTS treatment) with no interfering substances at or around the retention time of DMDS (i.e., 2.7 min). This simple, rapid, and extremely sensitive method can be used for the quantification of DMDS levels in blood to verify exposure to DMDS or to monitor levels of DMDS following DMTS treatment (e.g., for cyanide poisoning).
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Erny M, Lundqvist M, Rasmussen JH, Ludemann-Hombourger O, Bihel F, Pawlas J. Minimizing HCN in DIC/Oxyma-Mediated Amide Bond-Forming Reactions. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00227] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Marion Erny
- PolyPeptide Group, 7 rue de Boulogne, 67100 Strasbourg, France
- Faculty of Pharmacy, Laboratoire d’Innovation Thérapeutique, Université de Strasbourg, UMR7200, CNRS, 74 Route du Rhin, 67401 Illkirch-Graffenstaden, France
| | - Marika Lundqvist
- PolyPeptide Group, Limhamnsvägen 108, PO Box 30089, 20061 Limhamn, Sweden
| | - Jon H. Rasmussen
- PolyPeptide Group, Limhamnsvägen 108, PO Box 30089, 20061 Limhamn, Sweden
| | | | - Frédéric Bihel
- Faculty of Pharmacy, Laboratoire d’Innovation Thérapeutique, Université de Strasbourg, UMR7200, CNRS, 74 Route du Rhin, 67401 Illkirch-Graffenstaden, France
| | - Jan Pawlas
- PolyPeptide Group, Limhamnsvägen 108, PO Box 30089, 20061 Limhamn, Sweden
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Gyamfi OA, Bortey-Sam N, Donkor AB, White CW, Logue BA. Analysis of TRPA1 antagonist, A-967079, in plasma using high-performance liquid chromatography tandem mass-spectrometry. J Pharm Anal 2020; 10:157-163. [PMID: 32373387 PMCID: PMC7192962 DOI: 10.1016/j.jpha.2019.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 02/06/2023] Open
Abstract
The noxious effects from exposure to toxic inhalation hazards (TIHs, such as isocyanates, chlorine, etc.) are known to be triggered by the activation of transient receptor potential ankyrin 1 (TRPA1) ion channel. Antagonists of TRPA1 have shown near complete attenuation of the noxious effects from TIH exposure. One of the TRPA1 antagonists, (1E,3E)-1-(4-fluorophenyl)-2-methyl-1-pentene-3-one oxime (A-967079), has shown impressive efficacy, high selectivity, high potency, and oral bioavailability. Although a validated method to quantify A-967079 in biological matrices is vital for the further development of A-967079 as a therapeutic agent, no method for its analysis from any matrix is currently available. Hence, a rapid and simple HPLC-MS/MS method was developed and validated to quantify A-967079 in rabbit plasma. The method presented here features an excellent LOD of 25 nM and a wide linear range (0.05-200 μM), with good accuracy and precision (100 ± 10.5% and <14.2% relative standard deviation, respectively). The stability of A-967079 in plasma was excellent for most of the storage conditions evaluated. The method was successfully applied to determine A-967079 from treated animals and it may facilitate the development of this TRPA1 antagonist as a therapeutic agent against the noxious effects of TIH exposure.
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Affiliation(s)
- Obed A. Gyamfi
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, SD, 57007, USA
| | - Nesta Bortey-Sam
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, SD, 57007, USA
| | - Abigail B. Donkor
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, SD, 57007, USA
| | - Carl W. White
- Pediatrics-Pulmonary Medicine, University of Colorado-Denver, Denver, CO, 80045, USA
| | - Brian A. Logue
- Department of Chemistry and Biochemistry, South Dakota State University, Box 2202, Brookings, SD, 57007, USA
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