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Raoof GFA, El-Anssary AA, Younis EA, Aly HF. Metabolomic Analysis and in Vitro Investigation of the Biological Properties of a By-Product Derived from Vicia faba. Chem Biodivers 2023; 20:e202301095. [PMID: 37878681 DOI: 10.1002/cbdv.202301095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/21/2023] [Accepted: 10/24/2023] [Indexed: 10/27/2023]
Abstract
By-products from plant sources are recently regarded as a valuable source of bioactive compounds. In this regard, the present study aims to assess the bioactivities of the 70 % MeOH extract obtained from Vicia faba peels and analyze its metabolomic profile. Acetylcholinesterase and carbohydrate metabolizing enzymes inhibitory activities of the plant extract were assayed using quantitative colorimetric tests. Antioxidant activity was estimated by DPPH assay, and cytotoxic activity was evaluated against normal fibroblast skin cells (1-BJ1). Ninety-one metabolites were tentatively identified using ultra-high-performance liquid chromatography (UHPLC) hyphenated with quadrupole-time-of-flight tandem mass spectrometry (QTOF-MS). Most of these compounds were described for the first time in the plant. In addition, catechin, rutin, quercitrin, and rhamnetin were isolated from the plant extract. The plant extract and the isolated compounds possessed no cytotoxic activity on (1-BJ1), while they exhibited anticholinesterase with the highest activity for 70 % MeOH extract (IC50 =120.11 mg/L), antioxidant potential with the highest activity for rutin (90.54±0.73 %), and carbohydrate metabolizing inhibitory activities with the highest activity for rutin. These discoveries imply that V. faba peels might serve as an efficient antioxidant, exhibit anticholinesterase properties, and have the potential for use in managing diabetes, all while avoiding cytotoxicity in normal cells.
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Affiliation(s)
- Gehan F Abdel Raoof
- Pharmacognosy Department, Pharmaceutical and Drug Research Industries Institute, National Research Centre, Dokki, Giza, 12622, Egypt
| | - Amira A El-Anssary
- Pharmacognosy Department, Pharmaceutical and Drug Research Industries Institute, National Research Centre, Dokki, Giza, 12622, Egypt
| | - Eman A Younis
- Department of Therapeutic Chemistry, National Research Centre, Dokki, P.O. 12622, Giza, Egypt
| | - Hanan F Aly
- Department of Therapeutic Chemistry, National Research Centre, Dokki, P.O. 12622, Giza, Egypt
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2
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Goda MS, El-Kattan N, Abdel-Azeem MA, Allam KAM, Badr JM, Nassar NA, Almalki AJ, Alharbi M, Elhady SS, Eltamany EE. Antimicrobial Potential of Different Isolates of Chaetomium globosum Combined with Liquid Chromatography Tandem Mass Spectrometry Chemical Profiling. Biomolecules 2023; 13:1683. [PMID: 38136556 PMCID: PMC10742071 DOI: 10.3390/biom13121683] [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: 09/29/2023] [Revised: 10/28/2023] [Accepted: 11/09/2023] [Indexed: 12/24/2023] Open
Abstract
The antimicrobial resistance of pathogenic microorganisms against commercial drugs has become a major problem worldwide. This study is the first of its kind to be carried out in Egypt to produce antimicrobial pharmaceuticals from isolated native taxa of the fungal Chaetomium, followed by a chemical investigation of the existing bioactive metabolites. Here, of the 155 clinical specimens in total, 100 pathogenic microbial isolates were found to be multi-drug resistant (MDR) bacteria. The Chaetomium isolates were recovered from different soil samples, and wild host plants collected from Egypt showed strong inhibitory activity against MDR isolates. Chaetomium isolates displayed broad-spectrum antimicrobial activity against C. albicans, Gram-positive, and Gram-negative bacteria, with inhibition zones of 11.3 to 25.6 mm, 10.4 to 26.0 mm, and 10.5 to 26.5 mm, respectively. As a consecutive result, the minimum inhibitory concentration (MIC) values of Chaetomium isolates ranged from 3.9 to 62.5 µg/mL. Liquid chromatography combined with tandem mass spectrometry (LC-MS/MS) analysis was performed for selected Chaetomium isolates with the most promising antimicrobial potential against MDR bacteria. The LC-MS/MS analysis of Chaetomium species isolated from cultivated soil at Assuit Governate, Upper Egypt (3), and the host plant Zygophyllum album grown in Wadi El-Arbaein, Saint Katherine, South Sinai (5), revealed the presence of alkaloids as the predominant bioactive metabolites. Most detected bioactive metabolites previously displayed antimicrobial activity, confirming the antibacterial potential of selected isolates. Therefore, the Chaetomium isolates recovered from harsh habitats in Egypt are rich sources of antimicrobial metabolites, which will be a possible solution to the multi-drug resistant bacteria tragedy.
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Affiliation(s)
- Marwa S. Goda
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (M.S.G.); (J.M.B.)
| | - Noura El-Kattan
- Department of Microbiology, Research Institute of Medical Entomology, General Organization for Teaching Hospitals and Institutes, Giza 11562, Egypt;
| | - Mohamed A. Abdel-Azeem
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Industries, Sinai University, Al-Arish, North Sinai 45511, Egypt;
| | - Kamilia A. M. Allam
- Department of Epidemiology, Research Institute of Medical Entomology, General Organization for Teaching Hospitals and Institutes, Giza 11562, Egypt;
| | - Jihan M. Badr
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (M.S.G.); (J.M.B.)
| | | | - Ahmad J. Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.J.A.); (M.A.)
| | - Majed Alharbi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (A.J.A.); (M.A.)
| | - Sameh S. Elhady
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Enas E. Eltamany
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt; (M.S.G.); (J.M.B.)
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3
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Eom JS, Lee SJ, Kim HS, Choi Y, Jo SU, Lee SS, Kim ET, Lee SS. Metabolic profiling of serum and urine in lactating dairy cows
affected by subclinical ketosis using proton nuclear magnetic resonance
spectroscopy. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2022; 64:247-261. [PMID: 35530404 PMCID: PMC9039949 DOI: 10.5187/jast.2022.e14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 11/20/2022]
Abstract
Ketosis is associated with high milk yield during lactating or insufficient feed
intake in lactating dairy cows. However, few studies have been conducted on the
metabolomics of ketosis in Korean lactating dairy cows. The present study aimed
to investigate the serum and urine metabolites profiling of lactating dairy cows
through proton nuclear magnetic resonance (1H-NMR) spectroscopy and
comparing those between healthy (CON) and subclinical ketosis (SCK) groups. Six
lactating dairy cows were categorized into CON and SCK groups. All experimental
Holstein cows were fed total mixed ration. Serum and urine samples were
collected from the jugular vein of the neck and by hand sweeping the perineum,
respectively. The metabolites in the serum and urine were determined using
1H-NMR spectroscopy. Identification and quantification of
metabolites was performed by Chenomx NMR Suite 8.4 software. Metabolites
statistical analysis was performed by Metaboanalyst version 5.0 program. In the
serum, the acetoacetate level was significantly (p <
0.05) higher in the SCK group than in the CON group, and whereas acetate,
galactose and pyruvate levels tended to be higher. CON group had significantly
(p < 0.05) higher levels of 5-aminolevulinate and
betaine. Indole-3-acetate, theophylline, p-cresol, 3-hydroxymandelate,
gentisate, N-acetylglucosamine,
N-nitrosodimethylamine, xanthine and pyridoxine levels were
significantly (p < 0.05) higher in the urine of the SCK
group than that in the CON group, which had higher levels of homogentisate,
ribose, gluconate, ethylene glycol, maltose, 3-methyl-2-oxovalerate and
glycocholate. Some significantly (p < 0.05) different
metabolites in the serum and urine were associated with ketosis diseases,
inflammation, energy balance and body weight. This study will be contributed
useful a future ketosis metabolomics studies in Korea.
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Affiliation(s)
- Jun Sik Eom
- Institute of Agriculture and Life Science,
Gyeongsang National University, Jinju 52828, Korea
| | - Shin Ja Lee
- Institute of Agriculture and Life Science,
Gyeongsang National University, Jinju 52828, Korea
- University Centered Labs, Gyeongsang
National University, Jinju 52828, Korea
| | - Hyun Sang Kim
- Institute of Agriculture and Life Science,
Gyeongsang National University, Jinju 52828, Korea
| | - Youyoung Choi
- Division of Applied Life Science (BK21),
Gyeongsang National Universitiy, Jinju 52828, Korea
| | - Seong Uk Jo
- Division of Applied Life Science (BK21),
Gyeongsang National Universitiy, Jinju 52828, Korea
| | - Sang Suk Lee
- Ruminant Nutrition and Anaerobe
Laboratory, Department of Animal Science and Technology, Sunchon National
University, Suncheon 57922, Korea
| | - Eun Tae Kim
- Dairy Science Division, National Institute
of Animal Science, Rural Development Administration, Cheonan
31000, Korea
| | - Sung Sill Lee
- Institute of Agriculture and Life Science,
Gyeongsang National University, Jinju 52828, Korea
- University Centered Labs, Gyeongsang
National University, Jinju 52828, Korea
- Division of Applied Life Science (BK21),
Gyeongsang National Universitiy, Jinju 52828, Korea
- Corresponding author: Sung Sill Lee, Division of
Applied Life Science (BK21) & Institute of Agriculture and Life Science,
Gyeongsang National University, Jinju 52828, Korea. Tel: +82-55-772-1883,
E-mail:
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4
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Lu Z, Du X, Sun M, Zhang Y, Li Y, Wang X, Wang Y, Du H, Yin H, Rao H. Novel dual-template molecular imprinted electrochemical sensor for simultaneous detection of CA and TPH based on peanut twin-like NiFe 2O 4/CoFe 2O 4/NCDs nanospheres: Fabrication, application and DFT theoretical study. Biosens Bioelectron 2021; 190:113408. [PMID: 34126330 DOI: 10.1016/j.bios.2021.113408] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 05/09/2021] [Accepted: 06/02/2021] [Indexed: 11/29/2022]
Abstract
Hollow peanut-shaped NiFe2O4/CoFe2O4 twinned nano-spherical shell composite materials have interconnected electron channels and excellent electrochemical performance, which prompted the use of this unique spatial structure to fabricate efficient electrochemical sensors. In this work, N-doped carbon dots (NCDs) incorporated into magnetic NiFe2O4/CoFe2O4 nanoparticle shell (NiFe2O4/CoFe2O4/NCDs) modified glassy carbon electrode (GCE) was applied to construct a dual-template molecularly imprinted polymer (MIP) based electrochemistry sensor (NiFe2O4/CoFe2O4/NCDs/MIP/GCE) for the simultaneous detection of catechin (CA) and theophylline (TPH). MIP was fabricated by an in-situ electrochemical polymerization strategy based on the theoretical exploration and density functional theory (DFT) computer directional simulation to screen out the optimal functional monomer (L-arginine) and the optimal ratio between the dual template molecules (CA and TPH) and functional monomer. The materials were characterized by SEM, TEM, XRD, XPS, and TGA. Besides, electron binding energy, binding constant, and imprinting factor were investigated. With the optimal conditions, the proposed electrochemical dual detection system showed outstanding analytical performance for the simultaneous sensing of CA and TPH, with an ultralow detection limit (LOD, S/N = 3) of 1.3 nM for CA in 0.01-1 μM (R2 = 0.9956) and 1-50 μM (R2 = 0.9928), as well as a LOD of 20.0 nM for TPH in the linear range of 0.1-100 μM (R2 = 0.9939), respectively. Also, the selectivity and anti-interference performances of the fabricated sensor were performed by differential pulse voltammetry and chronoamperometry, and successfully detected the analyte from tea drinks and human urine samples with the recovery rates ranging from 98.22% to 104.76% and relative standard deviations (RSD) were 1.19%-3.81%, demonstrated the sensor has excellent stability, repeatability, and reproducibility, which paves the way for other platforms to use this nanomaterial for the detection of antioxidant in the filed food safety.
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Affiliation(s)
- Zhiwei Lu
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China.
| | - Xin Du
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Mengmeng Sun
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Yan Zhang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Yifan Li
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Xianxiang Wang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Yanying Wang
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China
| | - Haijun Du
- School of Chemical Engineering, Guizhou Minzu University, Guiyang, 550025, PR China
| | - Huadong Yin
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China.
| | - Hanbing Rao
- College of Science, Sichuan Agricultural University, Xin Kang Road, Yucheng District, Ya'an, 625014, PR China.
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5
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Rezvani SA, Soleymanpour A. Application of a sensitive electrochemical sensor modified with WO3 nanoparticles for the trace determination of theophylline. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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Salajegheh M, Ansari M, Foroghi MM, Kazemipour M. Computational design as a green approach for facile preparation of molecularly imprinted polyarginine-sodium alginate-multiwalled carbon nanotubes composite film on glassy carbon electrode for theophylline sensing. J Pharm Biomed Anal 2019; 162:215-224. [DOI: 10.1016/j.jpba.2018.09.032] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 09/14/2018] [Accepted: 09/15/2018] [Indexed: 11/16/2022]
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7
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Lopez-Sanchez RDC, Lara-Diaz VJ, Aranda-Gutierrez A, Martinez-Cardona JA, Hernandez JA. HPLC Method for Quantification of Caffeine and Its Three Major Metabolites in Human Plasma Using Fetal Bovine Serum Matrix to Evaluate Prenatal Drug Exposure. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2018; 2018:2085059. [PMID: 30186659 PMCID: PMC6109507 DOI: 10.1155/2018/2085059] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
Caffeine is recognized as the first-line therapeutic agent for apnea of prematurity. The dosage regimen is 10 mg/kg loading dose and 2.5 mg/kg maintenance dose. However, the plasma concentration achieved, not always, is therapeutically useful. It makes necessary to increase the doses to reach plasma concentration up to 30 or 35 μg/mL or even higher to attain therapeutic effect. To study why neonates have these differences, and whether these effects are linked to prenatal caffeine exposure, we had to develop an analytical method for an accurate measurement of caffeine and metabolites concentration. The analysis was carried out using fetal bovine serum (FBS) as biological matrix in a high-performance liquid chromatography with an ultraviolet detector method. This method allows acceptable chromatographic resolution between analytes in 15 minutes. It was validated and proved to be linear in the 0.1-40 µg/mL range for caffeine, paraxanthine, theobromine, and theophylline in the same chromatographic analysis. Accuracy for quality control samples for intra- and interday assays was ranged from 96.5 to 105.2% and 97.1 to 106.2%. Precision had CV no more than 10% in all concentration levels for all analytes. No differences were observed between quantification in human and FBS. This method was applied to quantify plasma drug concentration in mothers and their newborns in a Mexican northeast population. In our study, we confirmed self-reported caffeine maternal intake in 85.2% (n=23); meanwhile, in their newborn's plasma, it was detected only in 78% (n=21). Caffeine plasma concentrations in mother and newborn had a linear relationship, and no differences were observed between groups (mothers versus children). These results suggest that our analytical method and substitution of biological matrix was linear, precise, and accurate for caffeine quantification and could be used for measuring prenatal exposure and let us to study, in the future, concentration differences observed during apnea clinical treatment.
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Affiliation(s)
- Rosa del Carmen Lopez-Sanchez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL, Mexico
| | - Victor Javier Lara-Diaz
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL, Mexico
| | - Alejandro Aranda-Gutierrez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL, Mexico
| | - Jorge A. Martinez-Cardona
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL, Mexico
| | - Jose A. Hernandez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ave. Morones Prieto 3000, 64710 Monterrey, NL, Mexico
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8
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Kertys M, Urbanova A, Mokry J. Quantification of Theophylline in Guinea Pig Plasma by LC-MS/MS Using Hydrophilic Interaction Liquid Chromatography Stationary Phase: Method Development, Validation, and Application in Study. ACTA MEDICA MARTINIANA 2017. [DOI: 10.1515/acm-2017-0012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Theophylline has been used in the treatment of bronchial asthma and chronic obstructive pulmonary disease (COPD) for over 70 years. In order to maximize the effectiveness and safety of theophylline therapy it is important to individualize the dosage of the drug. In our study we focused on determination of theophylline concentrations in guinea pig plasma. A rapid, specific, and reliable LC-MS/MS-based method was developed and validated according to European Medicine Agency (EMA) guidelines. A hydrophilic interaction liquid chromatography (HILIC) separation mode for reduction time of sample preparation was used. The analysed sample was quantified in a positive ionization mode. Multiple reaction monitoring (MRM) using transition m/z 181.06→124.06 and m/z 187.17→127.06 was performed to quantify theophylline with deuterated internal standard ([2H6]-theophylline), respectively. Modification of collision energies was performed in parallel with chromatographic separation to further eliminate interference from the matrix. The method was validated for a range of 0.5 to 30 μg/mL of plasma sample. The intra-day and inter-day precision and accuracy of the quality control samples at low, me dium, and high concentration levels exhibited relative standard deviations (RSD) of less than 10 %. The method was successfully applied for the quantitation of theophylline in guinea pig plasma for better understanding its effects in a model of ovalbumin-induced allergic inflammation.
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Affiliation(s)
- M Kertys
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
| | - A Urbanova
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
| | - J Mokry
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin , Comenius University in Bratislava , Slovakia
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9
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Bulut İ. Simultaneous square-wave voltammetric determination of acetazolamide and theophylline in pharmaceutical formulations. RUSS J ELECTROCHEM+ 2016. [DOI: 10.1134/s1023193516050025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Quantification of caffeine in human saliva by Nuclear Magnetic Resonance as an alternative method for cytochrome CYP1A2 phenotyping. Talanta 2015; 140:36-41. [DOI: 10.1016/j.talanta.2015.03.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/27/2015] [Accepted: 03/02/2015] [Indexed: 11/21/2022]
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11
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Płonka J. Methods of biological fluids sample preparation - biogenic amines, methylxanthines, water-soluble vitamins. Biomed Chromatogr 2014; 29:1-20. [DOI: 10.1002/bmc.3353] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/22/2014] [Accepted: 09/02/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Joanna Płonka
- Silesian University of Technology; Faculty of Chemistry, Department of Inorganic, Analytical Chemistry and Electrochemistry; Strzody 7 Str. 44-100 Gliwice Poland
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12
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Panda SS, Kumar BVVR, Mohanta G. Stability-indicating RP-HPLC method for simultaneous estimation of levosalbutamol sulfate and theophylline in combined dosage form. BRAZ J PHARM SCI 2013. [DOI: 10.1590/s1984-82502013000300009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A novel, simple, accurate and precise RP-HPLC method for simultaneous determination of levosalbutamol sulfate and theophylline has been developed and validated. Separation was achieved on a Phenomenex; C18 column (250 mm × 4.6 mm i.d., 5 µm) using methanol: 10 mM TBAHS(tetrabutyl ammonium hydrogen sulfate) (50:50, v/v) as mobile phase at flow rate of 1.0 mL.min-1. The UV detection wavelength was 274 nm. The linearity is obeyed over a concentration range of 0.5-150 µg.mL-1 with correlation coefficient of 0.999 for both the drugs. The proposed method was validated by determining accuracy, precision, stability and system suitability parameters. The method was found to be robust. Specificity of the method was determined by subjecting the drugs to various stress conditions like acid, alkali, oxidation, thermal and photolytic degradation. The method was used successfully for the simultaneous determination of levosalbutamol sulfate and theophylline in syrup dosage form.
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13
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Sun W, Hu J. Voltammetric determination of theophylline in pharmaceutical formulations using aligned carbon nanotubes (ACNTs) film modified electrode. JOURNAL OF ANALYTICAL CHEMISTRY 2013. [DOI: 10.1134/s1061934813080121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Dmitrienko SG, Andreeva EY, Tolmacheva VV, Terent’eva EA. Sorption of methylxanthines by different sorbents. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2013. [DOI: 10.1134/s0036024413050051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Time-course measurements of caffeine and its metabolites extracted from fingertips after coffee intake: a preliminary study for the detection of drugs from fingerprints. Anal Bioanal Chem 2012. [DOI: 10.1007/s00216-012-6569-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Application of ionic liquid for extraction and separation of bioactive compounds from plants. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 904:1-21. [DOI: 10.1016/j.jchromb.2012.07.020] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 07/06/2012] [Accepted: 07/16/2012] [Indexed: 12/17/2022]
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17
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Sato Y, Zhang Y, Nishizawa S, Seino T, Nakamura K, Li M, Teramae N. Competitive assay for theophylline based on an abasic site-containing DNA duplex aptamer and a fluorescent ligand. Chemistry 2012; 18:12719-24. [PMID: 22915350 DOI: 10.1002/chem.201201298] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Indexed: 11/10/2022]
Abstract
A fluorescence assay for theophylline, one of the common drugs for acute and chronic asthmatic conditions, has been developed based on an abasic site-containing DNA duplex aptamer (AP aptamer) in combination with an abasic site-binding fluorescent ligand, riboflavin. The assay is based on the competitive binding of theophylline and riboflavin at the abasic (AP) site of the AP aptamer. In the absence of theophylline, riboflavin binds to the receptor nucleotide opposite the AP site, which leads to fluorescence quenching of the riboflavin. Upon addition of theophylline, competitive binding occurs between theophylline and riboflavin, which results in an effective fluorescence restoration due to release of riboflavin from the AP site. From an examination of the optimization of the AP aptamers, the complex of riboflavin with a 23-mer AP aptamer (5'-TCT GCG TCC AGX GCA ACG CAC AC-3'/5'-GTG TGC GTT GCC CTG GAC GCA GA-3'; X: the AP site (Spacer C3, a propylene residue)) possessing cytosine as a receptor nucleotide was found to show a selective and effective fluorescence response to theophylline; the limit of detection for theophylline was 1.1 μM. Furthermore, fluorescence detection of theophylline was successfully demonstrated with high selectivity in serum samples by using the optimized AP aptamer and riboflavin.
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Affiliation(s)
- Yusuke Sato
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Japan
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18
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Ogawa T, Hattori H, Iwai M, Ito K, Iwakura K, Ishii A, Suzuki O, Seno H. A rapid and simultaneous analysis of theophylline and its metabolites in human whole blood by ultra-performance liquid chromatography-tandem mass spectrometry. Forensic Toxicol 2012. [DOI: 10.1007/s11419-012-0133-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Chae JW, Kim DH, Lee BY, Kim EJ, Kwon KI. Development and validation of a sensitive LC–MS/MS method for the simultaneous quantitation of theophylline and its metabolites in rat plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 889-890:44-9. [DOI: 10.1016/j.jchromb.2012.01.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 01/20/2012] [Accepted: 01/25/2012] [Indexed: 11/26/2022]
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20
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Locatelli M, Governatori L, Carlucci G, Genovese S, Mollica A, Epifano F. Recent application of analytical methods to phase I and phase II drugs development: a review. Biomed Chromatogr 2011; 26:283-300. [DOI: 10.1002/bmc.1674] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Marcello Locatelli
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Luciana Governatori
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Giuseppe Carlucci
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Salvatore Genovese
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Adriano Mollica
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Francesco Epifano
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
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21
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Korany MA, Fahmy OT, Mahgoub H, Maher HM. High performance liquid chromatographic determination of some guaiphenesin-containing cough-cold preparations. J Adv Res 2011. [DOI: 10.1016/j.jare.2010.09.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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22
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Santos PMP, Silva SAG, Justino GC, Vieira AJSC. Demethylation of theophylline (1,3-dimethylxanthine) to 1-methylxanthine: the first step of an antioxidising cascade. Redox Rep 2010; 15:138-44. [PMID: 20594417 DOI: 10.1179/174329210x12650506623726] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The reaction of theophylline with HO(*) radical, produced by photolytic methods at pH 7, was studied in aqueous solution and the products characterised by HPLC and GC-MS. In addition to the expected 1,3-dimethyluric acid, the formation of 1-methylxanthine and, to a lesser extent, of 3-methylxanthine was observed. Theoretical calculations confirmed the preferred formation of the former compound. Both demethylated products were also observed upon reaction of theophylline with O(*-) radical anion at pH approximately 13, and 1-methylxanthine was consumed faster than 3-methylxanthine after its formation. Molecular oxygen had no significant effect on the formation of the mono-methylxanthine derivatives. A reaction mechanism for the demethylation of theophylline by oxidising radicals is proposed. This demethylation reaction can play an important role in the protection of biological targets against oxidative stress as the first step of an antioxidising cascade.
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Affiliation(s)
- Pedro M P Santos
- REQUIMTE/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
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23
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Molecular imprinting polymer electrosensor based on gold nanoparticles for theophylline recognition and determination. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0455-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Zhu T, Row KH. Simultaneous Determination of Caffeine and Theophylline in Human Plasma with a Weak Cation Monolithic SPE-column. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Zhu T, Bi W, Row KH. A new ionic liquids-based monolithic column for determination of caffeine and theophylline. J Appl Polym Sci 2010. [DOI: 10.1002/app.32684] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Bianco G, Abate S, Labella C, Cataldi TRI. Identification and fragmentation pathways of caffeine metabolites in urine samples via liquid chromatography with positive electrospray ionization coupled to a hybrid quadrupole linear ion trap (LTQ) and Fourier transform ion cyclotron resonance mass spectrometry and tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2009; 23:1065-1074. [PMID: 19260028 DOI: 10.1002/rcm.3969] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Liquid chromatography (LC) with positive ion electrospray ionization (ESI+) coupled to a hybrid quadrupole linear ion trap (LTQ) and Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS) was employed for the simultaneous determination of caffeine and its metabolites in human urine within a single chromatographic run. LC/ESI-FTICRMS led to the unambiguous determination of the molecular masses of the studied compounds without interference from other biomolecules. A systematic and comprehensive study of the mass spectral behaviour of caffeine and its fourteen metabolites by tandem mass spectrometry (MS/MS) was performed, through in-source ion trap collision-induced dissociation (CID) of the protonated molecules, [M+H](+). A retro-Diels-Alder (RDA) process along with ring-contraction reactions were the major fragmentation pathways observed during CID. The base peak of xanthine precursors originates from the loss of methyl isocyanate (CH(3)NCO, 57 Da) or isocyanic acid (HNCO, 43 Da), which in turn lose a CO unit. Also uric acid derivatives shared a RDA rearrangement as a common fragmentation process and a successive loss of CO(2) or CO. The uracil derivatives showed a loss of a ketene unit (CH(2)CO, 42 Da) from the protonated molecule along with the loss of H(2)O or CO. To assess the potential of the present method three established metabolite ratios to measure P450 CYP1A2, N-acetyltransferase and xanthine oxidase activities were evaluated by a number of identified metabolites from healthy human urine samples after caffeine intake.
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Affiliation(s)
- Giuliana Bianco
- Dipartimento di Chimica, Università degli Studi della Basilicata, Via N. Sauro 85, 85100 Potenza, Italy
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27
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Zhu T, Row KH. A Weak Cation-Exchange Monolithic SPE Column for Extraction and Analysis of Caffeine and Theophylline in Human Urine. Chromatographia 2009. [DOI: 10.1365/s10337-009-1076-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Yang G, Wang K, Xu J, Chen H. Determination of Theophylline in Drugs and Tea on Nanosized Cobalt Phthalocyanine Particles Modified Carbon Paste Electrode. ANAL LETT 2007. [DOI: 10.1081/al-120029740] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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29
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Nirogi RVS, Kandikere VN, Shukla M, Mudigonda K, Ajjala DR. A simple and rapid HPLC/UV method for the simultaneous quantification of theophylline and etofylline in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 848:271-6. [PMID: 17110179 DOI: 10.1016/j.jchromb.2006.10.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2006] [Revised: 10/12/2006] [Accepted: 10/20/2006] [Indexed: 11/19/2022]
Abstract
A simple, sensitive and selective high performance liquid chromatography (HPLC) method with ultraviolet detection (272 nm) was developed and validated for the simultaneous quantification of theophylline and etofylline in human plasma. Following rapid sample preparation, the analytes and internal standard (hydrochlorothiazide) were separated using an isocratic mobile phase on a reverse phase C18 column. The lower limit of quantification was 100 ng/mL for both theophylline and etofylline with a relative standard deviation of less than 6%. A linear dynamic range of 100-10,000 ng/mL for both theophylline and etofylline was established. This HPLC method was validated with between-batch precision of 2.2-6.0 and 1.4-3.7% for theophylline and etofylline, respectively. The between-batch accuracy was 94.3-98.0 and 95.4-98.2%, respectively. Stability of theophylline and etofylline in plasma was excellent, with no evidence of degradation during sample processing (autosampler) and 30 days storage in a freezer. This validated method is simple and rugged enough to be used in pharmacokinetic studies.
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Affiliation(s)
- Ramakrishna V S Nirogi
- Biopharmaceutical Research, Suven Life Sciences Ltd., Serene Chambers, Road #7, Banjara Hills, Hyderabad 500034, India.
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30
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Saka K, Uemura K, Shintani-Ishida K, Yoshida KI. Acetic acid improves the sensitivity of theophylline analysis by gas chromatography–mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 846:240-4. [PMID: 17011247 DOI: 10.1016/j.jchromb.2006.09.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2006] [Revised: 08/29/2006] [Accepted: 09/06/2006] [Indexed: 11/16/2022]
Abstract
In the analysis of theophylline by gas chromatography-mass spectrometry (GC-MS), we found that the addition of acetic acid to the solvent (ethyl acetate) decreased the adsorption of theophylline to the glass wool packed into the inlet liner. The addition of acetic acid to ethyl acetate improved the sensitivity for theophylline (optimum concentration of 3%). This simple and sensitive method without derivatization can be applied to the quantification of theophylline in serum samples in clinical and toxicological practice.
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Affiliation(s)
- Kanju Saka
- Department of Forensic Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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31
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Hori Y, Fujisawa M, Shimada K, Hirose Y, Yoshioka T. Method for Screening and Quantitative Determination of Serum Levels of Salicylic Acid, Acetaminophen, Theophylline, Phenobarbital, Bromvalerylurea, Pentobarbital, and Amobarbital Using Liquid Chromatography/Electrospray Mass Spectrometry. Biol Pharm Bull 2006; 29:7-13. [PMID: 16394500 DOI: 10.1248/bpb.29.7] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated a method for the simultaneous screening, identification, and quantitative determination of salicylic acid, acetaminophen, theophylline, barbiturates, and bromvalerylurea, drugs that frequently cause acute poisoning in Japan and therefore require rapid analysis for effective treatment in the clinical setting. The method employs liquid chromatography/electrospray mass spectrometry (LC/MS) of solid-phase extracted serum samples. For LC/MS ionization, the electrospray-ionization method was used, with acetaminophen in the positive-ion mode, and salicylic acid, theophylline, phenobarbital, bromvalerylurea, pentobarbital, amobarbital, and o-acetamidophenol (internal standard) in the negative-ion mode, the base ions were used in each case for quantitative analysis. Quantitation was possible for the following sample concentration ranges: salicylic acid and acetaminophen, 100 to 5 microg/ml; theophylline, 100 to 0.5 microg/ml; and phenobarbital, bromvalerylurea, pentobarbital, and amobarbital, 100 to 1 microg/ml. Using full-scan mass spectrometry, the lower detection limits of 1 microg/ml for salicylic acid and acetaminophen, 0.1 microg/ml for theophylline, and 0.5 microg/ml for phenobarbital, bromvalerylurea, pentobarbital, and amobarbital were adequate for identifying acute poisoning. When each compound was added to serum to a final concentration of 5 microg/ml and solid-phase extraction was performed using Oasis HLB 1-cc (30-mg), the mean recovery rate of each compound was 89.2 to 96.1% (n=5), and the coefficients of variation of the intraday and interday assays were 3.55 to 6.05% (n=5) and 3.68 to 6.38% (n=5), respectively, which are acceptable. When this method of analysis was applied in testing the sera of a female patient who had consumed a large amount of an unknown commercial drug, salicylic acid and bromvalerylurea were identified, and the treatment strategy could be determined in accordance with the serum concentration of those drugs.
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Affiliation(s)
- Yasushi Hori
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences.
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32
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Zhu YH, Zhang ZL, Pang DW. Electrochemical oxidation of theophylline at multi-wall carbon nanotube modified glassy carbon electrodes. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2005.05.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Riahi S, Mousavi MF, Bathaie SZ, Shamsipur M. A novel potentiometric sensor for selective determination of theophylline: Theoretical and practical investigations. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.05.074] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Peri-Okonny UL, Wang SX, Stubbs RJ, Guzman NA. Determination of caffeine and its metabolites in urine by capillary electrophoresis-mass spectrometry. Electrophoresis 2005; 26:2652-63. [PMID: 15948212 DOI: 10.1002/elps.200500231] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The caffeine content of foods and beverages varies considerably, interfering with our ability to obtain valid interpretations in many human studies with regard to the mechanism of action(s) of caffeine and/or its metabolites. The rate of metabolism of caffeine and other xanthine drugs also varies greatly from one individual to another. Therefore, it is extremely important to develop accurate, reliable analytical methods to quantify caffeine and its metabolites in simple and complex matrixes. A simple method is described for the separation and characterization of caffeine and its major metabolites employing capillary electrophoresis (CE) coupled to ultraviolet-absorption and mass spectrometry (MS) detection. After optimization of the electrophoresis separation conditions, a reliable separation of caffeine and 11 of its major metabolites was achieved in 50 mM ammonium carbonate buffer, pH 11.0. The volatile aqueous electrolyte system used with a normal electroosmotic flow polarity also provided an optimal separation condition for the characterization of the analytes by MS. The CE method achieved baseline resolution for all 12 compounds in less than 30 min. The CE-MS method is suitable for use as a routine procedure for the rapid separation and characterization of caffeine and its metabolites. The usefulness of this method was demonstrated by the extraction, separation, and identification of caffeine and its 11 metabolites from normal urine samples. The urine specimens were first acidified to obtain optimum binding efficiency to the sorbents of the off-line, solid-phase extraction procedure employed here, and an acidified eluent solvent was employed for the desorption step to maximize the recovery of the bound analytes.
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Affiliation(s)
- Unita L Peri-Okonny
- Bioanalytical Drug Metabolism, Johnson and Johnson Pharmaceutical Research and Development, Raritan, NJ 08869, USA
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35
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Martinavarro-Domínguez A, Boseb D, Durgbanshi A, Gil-Agustí M, Capella-Peiró ME, Broch SC, Esteve-Romero J. Monitoring bronchodilators with direct injection. J Chromatogr A 2005; 1073:309-15. [PMID: 15909535 DOI: 10.1016/j.chroma.2004.10.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A procedure was developed for the determination of caffeine and theophylline using a C18 column (5 microm, 250 mm x 4.6 mm) and micellar liquid chromatography using hybrid mobile phases containing sodium dodecyl sulfate (SDS) and propanol, butanol or pentanol as modifiers. Detection was performed with a variable wavelength UV-vis detector at 272 nm. After the application of an interpretative strategy for the selection of the optimimum mobile phase, caffeine and theophylline can be resolved and determined in serum samples by direct injection, using a mobile phase made up of 50 mM SDS-2.5% (v/v) propanol-10 mM KH2PO4, pH 7, with an analysis time below 5 min. Calibration was linear in the range 0.05 to 50 microg mL(-1) with r > 0.999. The statistical evaluation of the method was examined by performing intra-day (n = 6) and inter-day calibration (n = 7) and was found to be satisfactory, with highly accurate and precise results. The proposed method was suitably validated and applied to the determination of caffeine and theophylline in serum samples of patients treated with bronchodilators.
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36
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Beaudry F, Lavoie JP, Vachon P. Development of an electrospray ionization mass spectrometric method for the quantification of theophylline in horse serum. Biomed Chromatogr 2005; 19:643-8. [PMID: 15791690 DOI: 10.1002/bmc.490] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A rapid and selective method has been developed for the determination of theophylline in horse serum by LC-ESI/MS/MS. The analytical method includes a protein precipitation extraction for sample preparation, liquid chromatography separation technique and ionspray tandem mass spectrometry. The drug was extracted from serum using a protein precipitation with acetonitrile and the supernatants were analyzed using an LC-ESI/MS/MS instrument. The chromatography was performed using a 50 x 2.1 mm C(8) analytical column and an isocratic mobile phase composes of 60:40 acetonitrile-0.5% formic acid in water with a flow rate fixed at 350 microL/min. A linear (weighted 1/concentration) relationship was used to perform the calibration over an analytical range of 0.1-20 ppm. The intra-batch precision and accuracy at LLOQ, medium and high concentration were 11.7, 6.9 and 5.4% and 95.8, 107.8 and 95.8%, respectively, and the inter-batch precision and accuracy at LLOQ, medium and high concentration were 10.4, 7.9 and 7.3% and 97.3, 105.2 and 95.9%, respectively. This LC-ESI/MS/MS method for the determination of theophylline in horse serum has been proved to within generally accepted criteria used for bioanalytical assay and was used successfully during clinical investigation.
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Affiliation(s)
- Francis Beaudry
- Department of Veterinary Biomedicine, Faculty of Veterinary Medicine, University of Montreal, St-Hyacinthe, QC, Canada.
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37
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Song J, Park KU, Park HD, Yoon Y, Kim JQ. High-throughput liquid chromatography-tandem mass spectrometry assay for plasma theophylline and its metabolites. Clin Chem 2004; 50:2176-9. [PMID: 15502093 DOI: 10.1373/clinchem.2004.035337] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Junghan Song
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea
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38
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Tsai TH, Liu MC. Determination of unbound theophylline in rat blood and brain by microdialysis and liquid chromatography. J Chromatogr A 2004; 1032:97-101. [PMID: 15065783 DOI: 10.1016/j.chroma.2003.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
To investigate the mechanism by which theophylline crosses the blood-brain barrier (BBB) and its disposition, we determined unbound theophylline in rat blood and brain using microbore liquid chromatography coupled with microdialysis. Microdialysis probes were inserted into the jugular vein and the brain striatum of male Sprague-Dawley rats. Then theophylline at dosage of 10 or 30 mg/kg was administered through the femoral vein. Theophylline and dialysates were separated using a microbore phenyl-hexyl column (150 mm x 1 mm, 5 microm). The mobile phase comprised of acetonitrile-methanol-10 mM monosodium phosphate (pH 3.0) (10:20:70, v/v/v). The UV wavelength was set at 270 nm. The concentration-response relationship was linear over a concentration range of 0.05-50 microg/ml; intra-assay and inter-assay precision and accuracy of theophylline fell within 10%. Average in vivo recoveries were 0.74 +/- 0.06 in blood and 0.27 +/- 0.07 in brain with theophylline at concentrations 1, 2 and 5 microg/ml. This biological sampling method thereby allowed the determination of theophylline levels in blood and brain tissues. The disposition of theophylline in the blood and brain tissue suggests that there was rapid exchange and equilibration between the blood and brain system. The drug-drug interaction results indicate that theophylline was able to cross BBB, but that it might not be regulated by p-glycoprotein to the pharmacokinetics of theophylline.
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Affiliation(s)
- Tung-Hu Tsai
- National Research Institute of Chinese Medicine, 155-1, Li-Nong Street Section 2, Shih-Pai, Taipei 112, Taiwan.
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39
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Kanazawa H, Okada A, Igarashi E, Higaki M, Miyabe T, Sano T, Nishimura R. Determination of midazolam and its metabolite as a probe for cytochrome P450 3A4 phenotype by liquid chromatography–mass spectrometry. J Chromatogr A 2004; 1031:213-8. [PMID: 15058585 DOI: 10.1016/j.chroma.2003.12.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study demonstrated the analysis of midazolam and its metabolites by liquid chromatography-mass spectrometry (LC-MS) with a sonic spray ionization (SSI) interface. The analytical column was a YMC-Pak Pro C18 (50 mm x 2.0 mm i.d.) using 10 mM ammonium acetate (pH 4.8)-methanol (1:1) at a flow rate of 0.2 ml min(-1). The drift voltage was 100 V. The sampling aperture was heated at 110 degrees C and the shield temperature was 230 degrees C. The lower limits for the detection of midazolam and 1'-hydroxymidazolam were 26.3 and 112.76 pg injected, respectively. The calibration curves for midazolam and 1'-hydroxymidazolam were linear in the range of 0.1-5 microg ml(-1). Within-day relative standard deviations was less than 7%. The method was applied to the determination of midazolam in monkey plasma, and the analysis of midazolam and its metabolites in an in vitro study with recombinant cytochrome P450 (CYP) 3A4. This method is sufficiently sensitive and useful to elucidate the kinetics of midazolam metabolite formation. We also investigated the effect of propofol on the metabolism of midazolam using recombinant CYP3A4. Propofol competitively inhibited the metabolism of midazolam to 1'-hydroxymidazolam by CYP3A4.
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Affiliation(s)
- Hideko Kanazawa
- Department of Physical Chemistry, Kyoritsu College of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan.
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40
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Caubet MS, Comte B, Brazier JL. Determination of urinary 13C-caffeine metabolites by liquid chromatography–mass spectrometry: the use of metabolic ratios to assess CYP1A2 activity. J Pharm Biomed Anal 2004; 34:379-89. [PMID: 15013152 DOI: 10.1016/s0731-7085(03)00528-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2002] [Revised: 07/25/2003] [Accepted: 09/04/2003] [Indexed: 10/26/2022]
Abstract
A method using liquid chromatography coupled with mass spectrometry with an atmospheric pressure electrospray source was developed for analysis of labelled caffeine and fourteen of its metabolites in urine. Caffeine metabolic ratios were determined after an oral bolus of labelled caffeine in 20 healthy subjects with different characteristic CYP1A2 activity, relative to smoking habit and oral contraceptive intake. The use of labelled caffeine for the calculation of metabolic ratios avoided taking into account the important background of endogenous caffeine metabolites, very difficult to eliminate even after a specific diet. The selectivity and high sensitivity of mass spectrometry detection allowed urine collections for only a 3h period. Comparison between characteristic groups showed that labelled caffeine metabolic ratios were sensitive markers of changes in CYP1A2 activity.
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Affiliation(s)
- Marie-Sophie Caubet
- Faculté de Pharmacie, University of Montreal, Montreal, Que., Canada H3C 3J7
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41
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Schneider H, Ma L, Glatt H. Extractionless method for the determination of urinary caffeine metabolites using high-performance liquid chromatography coupled with tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 789:227-37. [PMID: 12742114 DOI: 10.1016/s1570-0232(03)00065-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Caffeine is metabolised in humans primarily by cytochromes P450 1A2 and 2A6, xanthine dehydrogenase/oxidase, and N-acetyltransferase 2. The activities of these enzymes show a large variation due to genetic polymorphisms and/or induction by xenobiotics. Ratios of different caffeine metabolites in urine or other body fluids are frequently used to characterise the individual/actual activity of these enzymes. The common analytical method involves extensive sample preparation, followed by HPLC-UV. The presence of numerous other UV-absorbing chemicals in body fluids affects the sensitivity and selectivity of this method. We have developed an HPLC-electrospray-MS-MS method for the determination of 11 caffeine metabolites and two internal standards after a simple, extractionless preparation. Blank urine, obtained after 5 days on a methylxanthine-free diet, contained small amounts of some caffeine metabolites, but no other components producing any confounding signals. Eleven metabolites and internal standards were recovered at 90 to 110% after addition to the blank urine (0.1 to 2.5 micro M in the final sample involving a 20-fold dilution of urine) in the 0.1-2.5 micro M concentration range. Other metabolites, 5-acetylamino-6-amino-3-methyluracil (AAMU) and 5-acetylamino-6-formylamino-3-methyluracil (AFMU), were detected with similar recovery and precision, but required higher concentrations (3 to 30 micro M). AFMU was completely converted into AAMU by a short alkalisation of urine. The method was explored in six healthy individuals after consuming coffee (4 mg caffeine per kg body mass). These experiments demonstrated the simplicity, high sensitivity and selectivity of the method under conditions used for phenotyping.
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Affiliation(s)
- Heiko Schneider
- Deutsches Institut für Ernährungsforschung, Abteilung Ernährungstoxikologie, Arthur-Scheunert-Allee 114-116, D-14558, Potsdam-Rehbrücke, Germany.
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42
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Wang P, Qi M, Zhong D, Fang L. Pharmacokinetics of a new sustained-release formulation of theophylline sodium glycerinate in healthy subjects with a new asymmetric dosage regimen. Biomed Chromatogr 2003; 17:58-61. [PMID: 12583008 DOI: 10.1002/bmc.214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Pharmacokinetics of a new sustained-release formulation of theophylline sodium glycerinate in healthy subjects was studied. In this study, a new asymmetric dosage regimen was presented to achieve a better accordance with the chronotherapy of asthma. Each of 10 subjects was administered one tablet (equivalent to 0.1 g anhydrous theophylline) in the morning and four tablets in the evening for a consecutive 6 days and blood samples were collected at the predetermined time and analyzed by a validated HPLC method. This new regimen produced a steady and effective level of theophylline in plasma for the whole day, especially in the evening. A lower dose in the morning could reach the effective level (C(min)4.97 +/- 1.60 microg/mL and C(max)10.68 +/- 1.80 micro g/mL over the a.m. dosing interval) and a higher dose in the evening did not result in toxic levels but led to a reasonable concentration range (C(max)9.72 +/- 1.56 microg/mL over p.m. dosing interval), which could maintain a higher plasma theophylline concentration without the risk of serious adverse events and control asthmatic symptoms probably occurring during the night or early in the morning. The results suggested that the proposed asymmetric regimen was necessary, practicable and safe for twice daily sustained-release tablets of theophylline sodium glycerinate and also provides the basis for the clinical dosage regimen of other theophylline formulated products.
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Affiliation(s)
- P Wang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110015, Liaoning, People's Republic of China
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43
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Gardinali PR, Zhao X. Trace determination of caffeine in surface water samples by liquid chromatography--atmospheric pressure chemical ionization--mass spectrometry (LC-APCI-MS). ENVIRONMENT INTERNATIONAL 2002; 28:521-528. [PMID: 12503918 DOI: 10.1016/s0160-4120(02)00080-6] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new method based on liquid-liquid extraction (LLE) coupled to reverse phase liquid chromatography and atmospheric pressure chemical ionization mass spectrometry (LC-APCI-MS) has been applied to determine trace amounts of caffeine (1,3,7-trimethylxanthine) in surface water samples from a near coastal ecosystem such as Biscayne Bay, Florida. The rational behind the development of such method will be to evaluate the use of unmetabolized caffeine as a potential dissolved phase tracer of human waste contamination. The method allows for the determination of caffeine at levels as low as 4.0 ng/l (ppt) in both salt and freshwater by extracting and concentrating a 1-1 water sample to a final volume of 500 microl and using HPLC separation coupled to an atmospheric pressure chemical ionization mass spectrometry (APCI-MS) system operated in selected ion monitoring (SIM) for the protonated molecular ions (M + H(+)). Samples from different portions of Biscayne Bay and the Miami River, one of its major tributaries, were analyzed and caffeine was detected in those areas previously identified for consistently exceeding the water quality criteria for fecal coliform bacteria contamination. The caffeine concentration in the samples with positive detection was generally low at levels equal or lower than 41 ng/l. However, there is a marked difference between samples collected in open bay areas and those collected from the Miami River.
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Affiliation(s)
- Piero R Gardinali
- Southeast Environmental Research Center, Florida International University, University Park Campus, CP-313, Miami, Florida 33199, USA.
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44
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Kanazawa H, Okada A, Matsushima Y, Yokota H, Okubo S, Mashige F, Nakahara K. Determination of omeprazole and its metabolites in human plasma by liquid chromatography-mass spectrometry. J Chromatogr A 2002; 949:1-9. [PMID: 11999727 DOI: 10.1016/s0021-9673(01)01508-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Omeprazole is a benzimidazole compound that acts as a proton-pump inhibitor. Because the metabolism of omeprazole is mainly catalyzed by cytochrome P-450 (CYP) 3A4 and CYP2C19. the genetic polymorphism of CYP2C19 could be of clinical concern in the treatment of acid-related diseases with omeprazole. Therefore, a reliable method for omeprazole phenotyping is desirable in clinical situations. This study has demonstrated the determination of omeprazole and its metabolites in human plasma by liquid chromatography-three-dimensional quadrupole mass spectrometry with a sonic spray ionization interface. The analytical column was YMC-Pack Pro C18(50x2.0 mm I.D.) using acetonitrile-50 mM ammonium acetate (pH 7.25) (1:4) at a flow-rate of 0.2 ml/min. The drift voltage was 30 V. The sampling aperture was heated at 110 degrees C and Shield temperature was 230 degrees C. In the mass spectrum, the molecular ions of omeprazole, hydroxyomeprazole and omeprazole sulfone were clearly observed as base peaks. This method is sufficiently sensitive and accurate for pharmacokinetic studies of omeprazol.
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