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Finšgar M. Surface and Subsurface Mass Spectrometric Analysis of Dexamethasone in Solid Pharmaceutical Dosage Forms. JOURNAL OF MASS SPECTROMETRY : JMS 2025; 60:e5147. [PMID: 40383988 PMCID: PMC12086350 DOI: 10.1002/jms.5147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2025] [Revised: 05/08/2025] [Accepted: 05/13/2025] [Indexed: 05/20/2025]
Abstract
This study presents an in-depth mass spectrometric investigation of dexamethasone (DEX) distribution within pharmaceutical tablets using time-of-flight secondary ion mass spectrometry (ToF-SIMS) combined with gas cluster ion beam (GCIB) sputtering. Fragmentation mechanism of DEX was identified, which enabled the determination of three-dimensional chemical imaging of the active ingredient in both surface and subsurface regions. The data reveal that a 4-mg DEX formulation exhibits a continuous and extended distribution of the drug into the tablet matrix, while a 0.5-mg formulation shows DEX localized in distinct, isolated domains. Topographical features and the overall composition of the surface were confirmed by complementary analyses employing atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). These results demonstrate how molecule distribution patterns can be linked to formulation heterogeneity using advanced mass spectrometric techniques, opening new possibilities for pharmaceutical manufacturing quality control and optimization.
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Affiliation(s)
- Matjaž Finšgar
- Faculty of Chemistry and Chemical EngineeringUniversity of MariborMariborSlovenia
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2
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Batool HM, Jalees MI, Batool M. Evaluating quackery formulations: LC-MS/MS based method for detecting glucocorticoid content. Toxicol Rep 2024; 13:101763. [PMID: 39497759 PMCID: PMC11533094 DOI: 10.1016/j.toxrep.2024.101763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2024] [Revised: 10/05/2024] [Accepted: 10/08/2024] [Indexed: 11/07/2024] Open
Abstract
Glucocorticoids are widely used as highly effective drugs for treating inflammatory diseases. In this study, a method was developed and validated using liquid chromatography-tandem mass spectrometry (LC-MS/MS) to simultaneously determine four glucocorticoids, including betamethasone, dexamethasone, hydrocortisone, and prednisolone in unauthorized or unregulated medicinal powders often associated with quackery formulations. Commercially available standards were used for method development and glucocorticoid detection. Glucocorticoids were extracted from the samples with methanol, which were then chromatographically separated using two mobile phases (0.1 % formic acid in water and 0.1 % formic acid in acetonitrile) in an isocratic flow on an Agilent Poroshel 120 C18 column (2.1 mm x 75 mm x 2.7 m). The validated analytical measuring range (AMR) of betamethasone and dexamethasone was 7.8-500 ng/mL, whereas, for hydrocortisone and prednisolone, AMR was 7.8-1000 ng/mL. The method showed an excellent coefficient of determination (r2) >0.990 for betamethasone, hydrocortisone, and prednisolone, while for dexamethasone 0.986. Accuracy and precision (intra/inter days) of these glucocorticoids showed a bias of 6-15 % (<20 %) and a coefficient of variation (CV) of <15 %. For each dilution factor, the integrity of samples was maintained after dilution. The developed method is sensitive and valuable for detecting, quantifying, and confirming the selected glucocorticoids in various quackery formulation powders commonly used in Pakistani setups.
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Affiliation(s)
| | - Muhammad Irfan Jalees
- Institute of Environmental Engineering and Research, University of Engineering and Technology, Lahore 54890, Pakistan
| | - Madeeha Batool
- School of Chemistry, University of the Punjab, Lahore 54590, Pakistan
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3
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Ma Y, Wei X, Xu J, Ji S, Yang F, Zeng A, Li Y, Cao J, Zhang J, Luo Z, Fu Q. Development of double-layer poly (amino acid) modified electrochemical sensor for sensitive and direct detection of betamethasone in cosmetics. Talanta 2024; 273:125855. [PMID: 38461643 DOI: 10.1016/j.talanta.2024.125855] [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: 10/08/2023] [Revised: 12/25/2023] [Accepted: 02/28/2024] [Indexed: 03/12/2024]
Abstract
Screening for illegal use of glucocorticoids (GCs) in cosmetics by electrochemical methods is extremely challenging due to the poor electrochemical activity of GCs. In this study, poly-L-Serine/poly-Taurine modified electrode (P(Tau)/P(L-Ser)/GCE) was prepared for sensitive and direct determination of betamethasone in cosmetics by a simple two-step in situ electropolymerization reaction. The relevant parameters of preparation and electroanalytical conditions were respectively studied, including the concentration of polymerization solution, the number of scanning circles and the scanning rate. The SEM and EDS mapping demonstrated successful preparation of P(Tau)/P(L-Ser)/GCE. The electro-catalytic properties of the obtained electrodes were investigated using cyclic voltammetry and differential pulse voltammetry methods, showing a remarkable improvement of sensitivity for the detection of betamethasone due to the synergic effect of both P(L-Ser) and P(Tau). In addition, we investigated the electrochemical reduction of betamethasone on the surface of modified electrode. It was found that the process was controlled by diffusion effect and involved the transfer of two electrons and two protons. Then the electrochemical sensor method based on P(Tau)/P(L-Ser)/GCE was established and delivered a linear response to betamethasone concentration from 0.5 to 20 μg mL-1 with a limit of detection of 32.2 ng mL-1, with excellent recoveries (98.1%-106.8%) and relative standard deviations (<4.8%). Furthermore, the established electrochemical sensor method was compared with conventional HPLC method. The results showed that both of them were comparable. Moreover, the established electrochemical sensor method was with the merits of short analysis time, environmentally friendly, low cost and easy to achieve in-site detection.
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Affiliation(s)
- Yirong Ma
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Xinran Wei
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Jiameng Xu
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Shuhua Ji
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Fan Yang
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Aiguo Zeng
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Yunzhe Li
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Jiliang Cao
- Department of Pharmaceutical Analysis, College of Pharmacy, Shenzhen Technology University, Shenzhen, 518118, China
| | - Jia Zhang
- Shaanxi Hanjiang Pharmaceutical Group Co., Ltd, Hanzhong, 723000, China
| | - Zhimin Luo
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China.
| | - Qiang Fu
- Department of Pharmaceutical Analysis, School of Pharmacy, Xi'an Jiaotong University, Xi'an, 710061, China; Department of Pharmaceutical Analysis, College of Pharmacy, Shenzhen Technology University, Shenzhen, 518118, China.
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4
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Chen W, Cheng X, Ma Y, Chen N. Foodborne doping and supervision in sports. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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5
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Determination of 27 Glucocorticoids in Urine by Ultra-High-Performance Liquid Chromatography-Tandem Mass Spectrometry Using UniSprayTM Source. SEPARATIONS 2023. [DOI: 10.3390/separations10030155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
Glucocorticoids (GCs) are a group of the most important and commonly used anti-inflammatory, antiallergenic, and immunosuppressive drugs. Like narcotics, they can be addictive if taken at increasing doses to achieve greater analgesic effects. The purpose of the study was to develop initial and confirmation testing analytical methods that would allow for the identification of glucocorticoid class substances in human urine to be used for routine analyses for the purposes of prosecution in the case of abuse, for clinical toxicology, medical jurisprudence, as well as for routine testing of athletes for the presence of prohibited substances in sports by means of ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) using a new generation ionization source UniSprayTM (U.S). This new method allows for the simultaneous detection of 27 glucocorticoids in human urine using LC-MS/MS. The tests conducted yielded relatively low LOD and LOQ values, ranging from 0.06 ng/mL to 0.14 ng/mL and 0.75 ng/mL for LOD and LOQ, respectively.
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6
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Bioanalytical LC-MS/MS method for simultaneous estimation of atorvastatin, its major active metabolites and ezetimibe. Bioanalysis 2022; 14:1349-1363. [PMID: 36621870 DOI: 10.4155/bio-2022-0203] [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: 01/10/2023] Open
Abstract
Background: Hyperlipidemia is one of the most common chronic diseases encountered globally, and atorvastatin (ATV) is mainly metabolized into two major active metabolites. Methodology: Hence, we aimed to estimate ATV and ezetimibe (EZE) simultaneously in the presence of ATV major and active metabolites using a validated LC-MS/MS method. Conclusion: The proposed method was linear (r2 >0.99), accurate (92.02-109.94%) and precise (CV% ≤14) over the concentration range of 0.50-120 ng/ml, 0.20-48 ng/ml, 0.50-120 ng/ml and 0.20-48 ng/ml for ATV, EZE, 2-hydroxy ATV and 4-hydroxy ATV, respectively. The applied liquid-liquid extraction gave rise to reliable extraction recoveries of 84.91 ± 1.14%, 85.20 ± 1.62%, 85.46 ± 0.41% and 105.46 ± 2.35% for ATV, EZE, 2-hydroxy ATV and 4-hydroxy ATV, respectively.
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7
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Investigation of fragmentation behaviors of steroidal drugs with Li+, Na+, K+ adducts by tandem mass spectrometry aided with computational analysis. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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8
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Xue Y, Sheng Y, Wang J, Huang Q, Zhang F, Wen Y, Liu S, Jiang Y. Fast Screening and Identification of Illegal Adulterated Glucocorticoids in Dietary Supplements and Herbal Products Using UHPLC-QTOF-MS With All-Ion Fragmentation Acquisition Combined With Characteristic Fragment Ion List Classification. Front Chem 2021; 9:785475. [PMID: 34957047 PMCID: PMC8702623 DOI: 10.3389/fchem.2021.785475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/16/2021] [Indexed: 11/13/2022] Open
Abstract
Ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS) with all-ion fragmentation (AIF) acquisition was established for an identification and quantification of illegal adulterated glucocorticoids in dietary supplements and herbal products. Next, a novel method called characteristic fragment ion list classification (CFILC) was developed for a fast screening of adulterated compounds. CFILC could provide the characteristic ions comprehensively and completely through direct extract from the MS2 library instead of finding them manually. This is time-saving and provides fast screening results with a high confidence level by filtering of a pre-calculated threshold of similarity scores for illegal adulterants that are not included in the library as well as for new emerging structural analogs. The obtained results demonstrated the great qualitative and quantitative strength of this approach, providing a promising and powerful method for a routine fast screening of illegal adulterated glucocorticoids.
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Affiliation(s)
- Ying Xue
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
| | - Yanghao Sheng
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
| | - Jue Wang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
| | - Qi Huang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
| | - Fengyu Zhang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China
| | - Ying Wen
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China
| | - Shao Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
| | - Yueping Jiang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Institute for Rational and Safe Medication Practices, Xiangya Hospital, Central South University, Changsha, China
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9
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Khan MS, Ravi PR, Mullapudi TVR. Dose identification of triamcinolone acetonide for noninvasive pre-corneal administration in the treatment of posterior uveitis using a rapid, sensitive HPLC method with photodiode-array detector. Biomed Chromatogr 2021; 36:e5264. [PMID: 34653273 DOI: 10.1002/bmc.5264] [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: 08/05/2021] [Revised: 10/03/2021] [Accepted: 10/05/2021] [Indexed: 11/07/2022]
Abstract
Triamcinolone acetonide (TAA) is the drug of choice in the management of ocular inflammations due to its anti-inflammatory and immuno-suppressant activity. Available marketed formulations (Triesence, Trivaris, Kenalog) are in the suspension form recommended to be administered via intravitreal injection, which has many major complications. In the present study, we have designed and evaluated Hydroxypropyl-β-cyclodextrin (HP-β-CD),) based conventional formulations of TAA (aqueous suspensions) with different dose strengths to identify the dose strength required for achieving the effective concentrations in vitreous humor following pre-corneal administration of the formulations. Ocular pharmacokinetic studies of conventional formulations of triamcinolone acetonide (TAA) with different dose strengths (1 mg/30µL, 2 mg/30µL, 4 mg/30µL) were performed to identify the dose strength required to produce effective concentrations of TAA in the aqueous and vitreous humor. A rapid, sensitive, selective, accurate and precise bioanalytical method utilizing a small sampling volume (<45 µL) was developed and validated for quantification of TAA in the samples obtained from the ocular pharmacokinetic studies. Aqueous suspensions of TAA with 20% HP-β-CD produced time course profiles in the aqueous humor at all the dose strengths. However, measurable concentrations and time course of TAA in vitreous humor were achieved only with 4 mg/30µL dose strength.
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Affiliation(s)
| | - Punna Rao Ravi
- Department of Pharmacy, BITS-Pilani Hyderabad Campus, Hyderabad, India
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10
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Jian L, Yuan X, Han J, Zheng R, Peng X, Wang K. Screening for illegal addition of glucocorticoids in adulterated cosmetic products using ultra-performance liquid chromatography/tandem mass spectrometry with precursor ion scanning. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2021; 35:e8999. [PMID: 33140453 DOI: 10.1002/rcm.8999] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 10/27/2020] [Accepted: 11/01/2020] [Indexed: 05/15/2023]
Abstract
RATIONALE The screening for illegal adulteration of glucocorticoids (GCs) in cosmetics is challenging due to the vast variety of potential GCs that are present to improve the declared effects. An effective analytical method to screen illegally added GCs in cosmetics is vital to protect consumers. METHODS An ultra-performance liquid chromatography/tandem mass spectrometry (UPLC/MS/MS) method using precursor ion scanning (PIS) acquisition mode was developed to screen GCs in cosmetics. Forty-seven GCs were investigated to identify their common product ions formed by collision-induced dissociation. Cosmetic samples spiked with GCs were extracted using solid-phase extraction. RESULTS Four common positive product ions, m/z 121, 135, 147, and 171, were selected for PIS analysis. Limits of detection (LODs) were established for all 47 GCs. The method was validated on spiked samples to ensure its effectiveness in terms of sensitivity and selectivity. Sixty samples were analyzed. Seven GCs were detected in six samples. CONCLUSIONS An effective screening method using UPLC/MS/MS with PIS acquisition mode was developed and successfully applied to screen for targeted and untargeted GCs in cosmetic samples.
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Affiliation(s)
- Longhai Jian
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
| | - Xiaoqian Yuan
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
| | - Jing Han
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
| | - Rong Zheng
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
| | - Xingsheng Peng
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
| | - Ke Wang
- National Medical Products Administration Key Laboratory for Monitoring and Evaluation of Cosmetics, Shanghai Institute for Food and Drug Control, Shanghai, 201203, China
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11
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Chiral Analysis of Amphetamine and Methamphetamine in Urine by Liquid Chromatography-Tandem Mass Spectrometry Applying Mosher Derivatization. Chromatographia 2020. [DOI: 10.1007/s10337-020-03984-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Bressan C, Ayala-Cabrera JF, Santos FJ, Cuadras S, Garrostas L, Monfort N, Alechaga É, Moyano E, Ventura R. Analysis of hydroxylated phenylalkylamine stimulants in urine by GC-APPI-HRMS. Anal Bioanal Chem 2020; 412:7837-7850. [PMID: 32954468 DOI: 10.1007/s00216-020-02913-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/04/2020] [Accepted: 08/24/2020] [Indexed: 11/27/2022]
Abstract
A gas chromatography-atmospheric pressure photoionization-high-resolution mass spectrometry (GC-APPI-HRMS) method was developed for the determination of eight phenylalkylamine stimulants in urine samples. Spiked urine samples were hydrolyzed, processed by solid-phase extraction, and derivatized before analysis. Two derivatization reactions were studied: the formation of trimethylsilyl (TMS) derivatives with N-methyl-N-trimethylsilyl trifluoroacetamide (MSTFA) and trimethylsilyl/trifluoroacetyl (TMS/TFA) derivatives with MSTFA and N-methyl-bis (trifluoroacetamide) (MBTFA) as derivatization reagents. Gas chromatography of both derivatives was performed with a 100% dimethylsiloxane column and a good separation of all isomeric compounds was achieved. To maximize the signal of the protonated molecule [M+H]+, the APPI most critical parameters were optimized. Three solvents were tested as dopant agents, with acetone yielding the lower in-source collision-induced dissociation (CID) fragmentation. The acquisition was performed in full scan and product ion scan (parallel reaction monitoring, PRM) using a quadrupole-Orbitrap mass analyzer (35,000 FWHM at m/z 200) in positive ion detection mode. At the optimal working conditions, the full scan method was evaluated for the fulfillment of identification requirements in doping analysis. Selectivity, limits of detection, matrix effect, and precision were estimated to validate the method for confirmation purposes and its applicability was tested by the analysis of spiked samples as well as by the analysis of samples obtained after the administration of some of the compounds to healthy volunteers. Results were compared with those obtained by GC-electron ionization-MS, demonstrating that the GC-APPI-HRMS method improved selectivity and sensibility, achieving lower limits of detection and satisfactory reproducibility.
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Affiliation(s)
- Claudia Bressan
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Juan F Ayala-Cabrera
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, 08028, Barcelona, Spain
| | - Francisco Javier Santos
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, 08028, Barcelona, Spain
| | - Susana Cuadras
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Lorena Garrostas
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Núria Monfort
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Élida Alechaga
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain
| | - Encarnación Moyano
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, 08028, Barcelona, Spain
| | - Rosa Ventura
- Catalonian Antidoping Laboratory, Doping Control Research Group, IMIM (Hospital del Mar Medical Research Institute), Doctor Aiguader 88, 08003, Barcelona, Spain.
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Finšgar M, Perva-Uzunalić A, Behr H, Ledinek N, Knez Ž, Novak Z. An Improved Reversed-Phase High-Performance Liquid Chromatography Method for the Analysis of Related Substances of Prednisolone in Active Ingredient. ACS OMEGA 2020; 5:7987-8000. [PMID: 32309709 PMCID: PMC7161046 DOI: 10.1021/acsomega.0c00037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/19/2020] [Indexed: 05/22/2023]
Abstract
Prednisolone, an important active pharmaceutical ingredient, is a synthetic glucocorticoid used for the preparation of various pharmaceutical products with anti-inflammatory and immunosuppressive properties. It is a challenge in high-performance liquid chromatography (HPLC) to separate the prednisolone peak and its structurally related substance (hydrocortisone), which only differs in a double bond at the C-1 position. Successful application of the HPLC method according to the European Pharmacopoeia monograph for related substances of prednisolone is very often limited to the chromatographic system available. This is due to the nonbaseline separation of the prednisolone and hydrocortisone peaks, which is strongly influenced by the instrument parameters and the chosen C18 column. First, an adjusted European Pharmacopoeia method for related substances of prednisolone was developed within the allowable adjustments. Next, an improved stability-indicating reversed-phase HPLC method for related substances of prednisolone was developed and validated for use in quality control laboratories for routine analysis. The optimized separation was performed on a Phenomenex Gemini C18 column (150 mm × 4.6 mm, 3 μm) using a gradient mobile-phase system consisting of acetonitrile/tetrahydrofuran/water (15:10:75 v/v/v), acetonitrile/water (80:20 v/v), and ultraviolet detection at 254 nm. A baseline separation was achieved, and stability indicating capability was demonstrated by a forced degradation study. A full validation procedure was performed in accordance with International Conference on Harmonization of Technical Requirements for Registration of Pharmaceuticals for Human Use guidelines.
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Affiliation(s)
- Matjaž Finšgar
- Faculty of Chemistry
and Chemical Engineering, University of
Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Amra Perva-Uzunalić
- Faculty of Chemistry
and Chemical Engineering, University of
Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Heiko Behr
- Phenomenex, Ltd., Zeppelinstrasse 5, 63741 Aschaffenburg, Germany
| | - Nina Ledinek
- Faculty of Chemistry
and Chemical Engineering, University of
Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Željko Knez
- Faculty of Chemistry
and Chemical Engineering, University of
Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
- Faculty of Medicine, University
of Maribor, Taborska
ulica 8, 2000 Maribor, Slovenia
| | - Zoran Novak
- Faculty of Chemistry
and Chemical Engineering, University of
Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
- . Phone: +386 2 2294 405
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14
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Mansur AH, Hassan M, Duffy J, Webster C. Development and Clinical Application of a Prednisolone/Cortisol Assay to Determine Adherence to Maintenance Oral Prednisolone in Severe Asthma. Chest 2020; 158:901-912. [PMID: 32298734 DOI: 10.1016/j.chest.2020.03.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 03/09/2020] [Accepted: 03/19/2020] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Nonadherence to oral prednisolone is an important driver of poor control in severe asthma, and its detection is warranted to guide management. RESEARCH QUESTION The goal of this study was to evaluate the utility of liquid chromatography and tandem mass spectrometry (LC-MS/MS) in determining the adherence status to oral prednisolone in severe asthma. STUDY DESIGN AND METHODS Timeline serum levels of prednisolone, cortisol, and metabolites were measured by using a validated LC-MS/MS assay following observed intake of prednisolone in patients receiving maintenance oral prednisolone. Patterns of adherence and nonadherence were determined from analysis of peak blood levels. The performance of a spot test for adherence (detectable prednisolone and suppressed cortisol) was assessed in a second cohort of patients receiving maintenance prednisolone and a control group. RESULTS In the prednisolone absorption test, 27 patients (mean age, 38.6 years; age range, 17-63 years; 83% female) were included. We identified adherence in 13 (48%), nonadherence in 13 (48%), and malabsorption in one (3.7%). The median [interquartile range] peak serum assays of the adherent group compared with the nonadherent group were: cortisol, 36 [39.5] vs 295 [153] nmol/L; and prednisolone, 1,810 [590] vs 1,730 [727] nmol/L. The spot test cohort included 111 patients (67 on maintenance prednisolone and 44 control subjects); the mean age was 42.4 years, and 79% were female. Nonadherence was detected in 40.3% of patients; comparison of the adherent vs nonadherent groups revealed median [interquartile range] levels for cortisol of 27 [48] nmol/L vs 211 [130] nmol/L and for prednisolone of 259 [622] nmol/L vs < 20 nmol/L, respectively. Adherent patients had higher mean BMI (38.4 ± 8.7 vs 32 ± 7.5 kg/m2; P = .03), lower median blood eosinophils (0.09 [0.31] vs 0.51 [0.53] × 109/L; P < .001), and a trend toward reduced mean annual severe exacerbations (3.0 ± 2.6 vs 4.3 ± 2.4; P = .3) than nonadherent patients. INTERPRETATION Nonadherence to oral prednisolone is common in severe asthma and can be reliably detected in the clinic by using the LC-MS/MS assay.
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Affiliation(s)
- Adel H Mansur
- Birmingham Regional Severe Asthma Service, Heartlands Hospital, University Hospitals Birmingham, Birmingham, England; Institute of inflammation and Ageing, University of Birmingham, Birmingham, England.
| | - Maged Hassan
- Birmingham Regional Severe Asthma Service, Heartlands Hospital, University Hospitals Birmingham, Birmingham, England
| | - Joanne Duffy
- Biochemistry Department, Heartlands Hospital, University Hospitals Birmingham, Birmingham, England
| | - Craig Webster
- Biochemistry Department, Heartlands Hospital, University Hospitals Birmingham, Birmingham, England
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Hill M, Hána V, Velíková M, Pařízek A, Kolátorová L, Vítků J, Škodová T, Šimková M, Šimják P, Kancheva R, Koucký M, Kokrdová Z, Adamcová K, Černý A, Hájek Z, Dušková M, Bulant J, Stárka L. A method for determination of one hundred endogenous steroids in human serum by gas chromatography-tandem mass spectrometry. Physiol Res 2019; 68:179-207. [PMID: 31037947 DOI: 10.33549/physiolres.934124] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Steroid profiling helps various pathologies to be rapidly diagnosed. Results from analyses investigating steroidogenic pathways may be used as a tool for uncovering pathology causations and proposals of new therapeutic approaches. The purpose of this study was to address still underutilized application of the advanced GC-MS/MS platform for the multicomponent quantification of endogenous steroids. We developed and validated a GC-MS/MS method for the quantification of 58 unconjugated steroids and 42 polar conjugates of steroids (after hydrolysis) in human blood. The present method was validated not only for blood of men and non-pregnant women but also for blood of pregnant women and for mixed umbilical cord blood. The spectrum of analytes includes common hormones operating via nuclear receptors as well as other bioactive substances like immunomodulatory and neuroactive steroids. Our present results are comparable with those from our previously published GC-MS method as well as the results of others. The present method was extended for corticoids and 17alpha-hydroxylated 5alpha/ß-reduced pregnanes, which are useful for the investigation of alternative "backdoor" pathway. When comparing the analytical characteristics of the present and previous method, the first exhibit by far higher selectivity, and generally higher sensitivity and better precision particularly for 17alpha-hydroxysteroids.
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Affiliation(s)
- M Hill
- Department of Steroid Hormones and Proteohormones, Institute of Endocrinology, Národní 8, 116 94, Prague, Czech Republic.
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16
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Śniegocki T, Sell B, Posyniak A. The Usefulness of MS 3 to Confirm Poisoning on the Example of Dog Poisoning with Strychnine. Molecules 2019; 24:molecules24203765. [PMID: 31635042 PMCID: PMC6832480 DOI: 10.3390/molecules24203765] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 12/17/2022] Open
Abstract
Strychnine is an alkaloid with strong toxic properties. Poisoning results in muscular contractions and death through asphyxiation. Intentional or accidental poisonings with strychnine occur mainly in small animals, especially dogs and occasionally cats. Strychnine can be detected in the liver or stomach contents. Unfortunately, the determination of strychnine in these matrices, especially in postmortem examination, is subject to a significant matrix effect that makes it difficult to confirm the presence of the substance being determined. Therefore, we developed a new liquid chromatography method combined with mass spectrometry. One-gram homogenized samples were extracted and partitioned after adding acetonitrile and 5-mol solution of ammonium acetate. After extraction, the samples were analyzed using high-pressure liquid chromatography-MS/MS/MS. The results of validation fulfil the requirement of the confirmatory criteria according to SANTE/11945/2015 regarding apparent recoveries (98.97% to 104.0%), repeatability (2.9%-4.1%), and within-laboratory reproducibility (3.3%-4.6%). The method can be successfully applied to confirm strychnine poisoning cases.
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Affiliation(s)
- Tomasz Śniegocki
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, 24-100 Pulawy, Poland.
| | - Bartosz Sell
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, 24-100 Pulawy, Poland.
| | - Andrzej Posyniak
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, 24-100 Pulawy, Poland.
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Xu Q. Incorporating solid-phase extraction into compendial procedures for the determination of dexamethasone and impurities in low-dose drug products. J Pharm Biomed Anal 2019; 175:112773. [DOI: 10.1016/j.jpba.2019.07.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/11/2019] [Accepted: 07/12/2019] [Indexed: 11/25/2022]
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18
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Alcántara Guardado A, Cooper G, Weightman A, Spiess R, Baker ADL. Dilution and microfiltration of particulate corticosteroids for spinal epidural injections: impact on drug concentration and agglomerate formation. Anaesthesia 2019; 74:1551-1557. [PMID: 31228255 DOI: 10.1111/anae.14733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2019] [Indexed: 02/04/2023]
Abstract
Particulate corticosteroids have been described to lead to greater pain improvement compared with their non-particulate counterparts when used in epidural injections. It is hypothesised that filtering may significantly impact their concentration and long-term efficacy. We investigated if passing particulate suspensions through different commonly-used filters affects drug dosage. Two particulate corticosteroid formulations, triamcinolone acetonide and methylprednisolone acetate, were mixed at different concentrations with either bupivacaine hydrochloride or 0.9% sodium chloride. Solutions were passed through a 5-μm and a 0.2-μm filter. Mass spectroscopy results indicated a complete loss of corticosteroid from the solutions using both filters, and light microscopy imaging demonstrated agglomerate formation, suggesting that filtering interferes with drug dosage. The choice of diluents must also be considered to reduce large agglomerate formation. Clinicians should be aware of the consequences of filtering particulate suspensions and carefully consider the selection of diluent when considering treatment plans.
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Affiliation(s)
- A Alcántara Guardado
- School of Mechanical, Aerospace & Civil Engineering, University of Manchester, UK
| | - G Cooper
- School of Mechanical, Aerospace & Civil Engineering, University of Manchester, UK
| | - A Weightman
- School of Mechanical, Aerospace & Civil Engineering, University of Manchester, UK
| | - R Spiess
- Experimental Officer, Manchester Institute of Biotechnology, University of Manchester, UK
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19
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Brunacci N, Neffe AT, Wischke C, Naolou T, Nöchel U, Lendlein A. Oligodepsipeptide (nano)carriers: Computational design and analysis of enhanced drug loading. J Control Release 2019; 301:146-156. [DOI: 10.1016/j.jconrel.2019.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 10/27/2022]
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20
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Kotłowska A, Szefer P. Recent Advances and Challenges in Steroid Metabolomics for Biomarker Discovery. Curr Med Chem 2019; 26:29-45. [PMID: 29141530 DOI: 10.2174/0929867324666171113120810] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 03/01/2017] [Accepted: 03/20/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND Steroid hormones belong to a group of low-molecular weight compounds which are responsible for maintenance of various body functions, thus, their accurate assessment is crucial for evaluation of biosynthetic defects. The development of reliable methods allowing disease diagnosis is essential to improve early detection of various disorders connected with altered steroidogenesis. Currently, the field of metabolomics offers several improvements in terms of sensitivity and specificity of the diagnostic methods when opposed to classical diagnostic approaches. The combination of hyphenated techniques and pattern recognition methods allows to carry out a comprehensive assessment of the slightest alterations in steroid metabolic pathways and can be applied as a tool for biomarker discovery. METHODS We have performed an extensive literature search applying various bibliographic databases for peer-reviewed articles concentrating on the applications of hyphenated techniques and pattern recognition methods incorporated into the steroid metabolomic approach for biomarker discovery. RESULTS The review discusses strengths, challenges and recent developments in steroidbased metabolomics. We present methods of sample collection and preparation, methods of separation and detection of steroid hormones in biological material, data analysis, and interpretation as well as examples of applications of steroid metabolomics for biomarker discovery (cancer, mental and central nervous system disorders, endocrine diseases, monitoring of drug therapy and doping control). CONCLUSION Information presented in this review will be valuable to anyone interested in the application of metabolomics for biomarker discovery with a special emphasis on disorders of steroid hormone synthesis and metabolism.
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Affiliation(s)
- Alicja Kotłowska
- Department of Food Sciences, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdansk, Poland
| | - Piotr Szefer
- Department of Food Sciences, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdansk, Poland
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21
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Esposito MC, Santos ALA, Bonfilio R, de Araújo MB. A Critical Review of Analytical Methods in Pharmaceutical Matrices for Determination of Corticosteroids. Crit Rev Anal Chem 2019; 50:111-124. [PMID: 30869528 DOI: 10.1080/10408347.2019.1581050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Corticosteroids are a class of hormones released by the adrenal cortex, which includes glucocorticoids and mineralocorticoids. Glucocorticoids have an important role in the metabolism of carbohydrates, proteins and calcium and effective anti-inflammatory and immunosuppressive activity. Due to their intense immunomodulatory and anti-inflammatory activity, glucocorticoids are used in the treatment of various inflammatory, malignant, allergic conditions such as rhinitis, asthma, dermatological, rheumatic, ophthalmic and neurological diseases, as well as after organ transplants. They are the most widely prescribed drugs in the world. The objective of this review is to provide an overview of the analytical methods in pharmaceutical matrices for determination of corticosteroids. In this study, the predominance of liquid chromatography methods for the analysis of corticosteroids from pharmaceutical products is evident for both liquid and semisolid dosage forms as well as for solids. The same can be said for topical, oral and parenteral formulations. Methods such as spectrophotometry are also used, but given the advantages of chromatographic methods such as better selectivity and sensitivity, they have become the choice for analysis of these drugs, however, most methods still do not meet the credentials of "green chemistry."
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Affiliation(s)
- Milena Carla Esposito
- Department of Food and Drug Administration, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | | | - Rudy Bonfilio
- Department of Food and Drug Administration, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
| | - Magali Benjamim de Araújo
- Department of Food and Drug Administration, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil
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22
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Trace analysis of corticosteroids (CSs) in environmental waters by liquid chromatography-tandem mass spectrometry. Talanta 2018; 195:830-840. [PMID: 30625625 DOI: 10.1016/j.talanta.2018.11.113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 11/20/2022]
Abstract
Natural and synthetic corticosteroids (CSs) are a class of steroid hormones which could potentially disturb the corticosteroid signaling pathways in wildlife and humans. In this study, a sensitive and robust analytical method using solid phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for simultaneous analysis of sub-ng/L concentrations of 26 CSs in highly complex natural water matrices. The method performance was validated for WWTP influent, effluent, surface water and finished drinking water. Low practical quantification levels (PQLs) were achieved as 0.008-0.16 ng/L in finished drinking water, 0.019-0.50 ng/L in surface water, 0.047-1.5 ng/L in WWTP effluent, and 0.10-3.1 ng/L in WWTP influent, respectively, with the recoveries ranging from 70% to 130%. The cleanup performance and matrix interferences were also evaluated. This method was then applied to the analysis of target CSs in WWTP influent and effluent samples collected from a local WWTP, as well as surface water downstream of the WWTP outfall, detecting an average summed CS concentration of 744 ng/L in influent, 23.4 ng/L in effluent and 10.9 ng/L in surface water. Four synthetic CSs (triamcinolone acetonide, fluocinolone acetonide, clobetasol propionate, and fluticasone propionate) were found poorly removed in the WWTP. The developed method provides a tool to obtain occurrence data of corticosteroids in environmental waters, which will permit assessing their risk to environmental organisms.
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23
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Handling of highly coeluted chromatographic peaks by multivariate curve resolution for a complex bioanalytical problem: Quantitation of selected corticosteroids and mycophenolic acid in human plasma. Talanta 2018; 187:1-12. [DOI: 10.1016/j.talanta.2018.04.089] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/22/2018] [Accepted: 04/27/2018] [Indexed: 02/03/2023]
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24
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Sun W, Ho S, Fang XR, O’Shea T, Liu H. Simultaneous determination of triamcinolone hexacetonide and triamcinolone acetonide in rabbit plasma using a highly sensitive and selective UPLC–MS/MS method. J Pharm Biomed Anal 2018; 153:267-273. [DOI: 10.1016/j.jpba.2018.02.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/19/2018] [Accepted: 02/22/2018] [Indexed: 10/18/2022]
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25
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Kumar BR. Application of HPLC and ESI-MS techniques in the analysis of phenolic acids and flavonoids from green leafy vegetables (GLVs). J Pharm Anal 2017; 7:349-364. [PMID: 29404060 PMCID: PMC5790745 DOI: 10.1016/j.jpha.2017.06.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 06/12/2017] [Accepted: 06/15/2017] [Indexed: 01/27/2023] Open
Abstract
Diets containing high proportions of fruits and vegetables reduce the risk of onset of chronic diseases. The role of herbal medicines in improving human health is gaining popularity over the years, which also increases the need for safety and efficiency of these products. Green leafy vegetables (GLVs) are the richest source of phenolic compounds with excellent antioxidant properties. Increased consumption of diets containing phenolic compounds may give positive and better results to human health and significantly improves the immune system. Highly selective, susceptible and versatile analytical techniques are necessary for extraction, identification, and quantification of phenolic compounds from plant extracts, which helps to utilize their important biological properties. Recent advances in the pre-treatment procedures, separation techniques and spectrometry methods are used for qualitative and quantitative analysis of phenolic compounds. The online coupling of liquid chromatography with mass spectrometry (LC-MS) has become a useful tool in the metabolic profiling of plant samples. In this review, the separation and identification of phenolic acids and flavonoids from GLVs by LC-MS have been discussed along with the general extraction procedures and other sources of mass spectrometer used. The review is devoted to the understanding of the structural configuration, nature and accumulation pattern of phenolic acids and flavonoids in plants and to highlighting the recent developments in the chemical investigation of these compounds by chromatographic and spectroscopic techniques. It concludes with the advantages of the combination of these two methods and prospects.
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26
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Li H, Ai L, Fan S, Wang Y, Sun D. Rapid determination of 18 glucocorticoids in serum using reusable on-line SPE polymeric monolithic column coupled with LC-quadrupole/orbitrap high-resolution mass spectrometer. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1065-1066:79-86. [DOI: 10.1016/j.jchromb.2017.09.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 05/25/2017] [Accepted: 09/17/2017] [Indexed: 12/15/2022]
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27
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Liquid Chromatography Tandem Mass Spectrometry and Nuclear Magnetic Resonance Spectroscopy of Magnesium (II) Gluconate Solution. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-017-0613-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Nicoli R, Guillarme D, Leuenberger N, Baume N, Robinson N, Saugy M, Veuthey JL. Analytical Strategies for Doping Control Purposes: Needs, Challenges, and Perspectives. Anal Chem 2015; 88:508-23. [DOI: 10.1021/acs.analchem.5b03994] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Raul Nicoli
- Swiss
Laboratory for Doping Analyses, University Center of Legal Medicine,
Lausanne-Geneva, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Chemin des Croisettes 22, 1066 Epalinges, Switzerland
| | - Davy Guillarme
- School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Boulevard d’Yvoy 20, 1211 Geneva 4, Switzerland
| | - Nicolas Leuenberger
- Swiss
Laboratory for Doping Analyses, University Center of Legal Medicine,
Lausanne-Geneva, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Chemin des Croisettes 22, 1066 Epalinges, Switzerland
| | - Norbert Baume
- Swiss
Laboratory for Doping Analyses, University Center of Legal Medicine,
Lausanne-Geneva, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Chemin des Croisettes 22, 1066 Epalinges, Switzerland
| | - Neil Robinson
- Swiss
Laboratory for Doping Analyses, University Center of Legal Medicine,
Lausanne-Geneva, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Chemin des Croisettes 22, 1066 Epalinges, Switzerland
| | - Martial Saugy
- Swiss
Laboratory for Doping Analyses, University Center of Legal Medicine,
Lausanne-Geneva, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Chemin des Croisettes 22, 1066 Epalinges, Switzerland
| | - Jean-Luc Veuthey
- School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Boulevard d’Yvoy 20, 1211 Geneva 4, Switzerland
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Current status and recent advantages in derivatization procedures in human doping control. Bioanalysis 2015; 7:2537-56. [DOI: 10.4155/bio.15.172] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Derivatization is one of the most important steps during sample preparation in doping control analysis. Its main purpose is the enhancement of chromatographic separation and mass spectrometric detection of analytes in the full range of laboratory doping control activities. Its application is shown to broaden the detectable range of compounds, even in LC–MS analysis, where derivatization is not a prerequisite. The impact of derivatization initiates from the stage of the metabolic studies of doping agents up to the discovery of doping markers, by inclusion of the screening and confirmation procedures of prohibited substances in athlete's urine samples. Derivatization renders an unlimited number of opportunities to advanced analyte detection.
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30
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Selvi A, Das D, Das N. Potentiality of yeast Candida sp. SMN04 for degradation of cefdinir, a cephalosporin antibiotic: kinetics, enzyme analysis and biodegradation pathway. ENVIRONMENTAL TECHNOLOGY 2015; 36:3112-3124. [PMID: 26000889 DOI: 10.1080/09593330.2015.1054318] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 05/19/2015] [Indexed: 06/04/2023]
Abstract
A new yeast strain isolated from the pharmaceutical wastewater was capable of utilizing cefdinir as a sole carbon source for their growth in mineral medium. The yeast was identified and named as Candida sp. SMN04 based on morphology and 18S-ITS-D1/D2/D3 rRNA sequence analysis. The interaction between factors pH (3.0-9.0), inoculum dosage (1-7%), time (1-11 day) and cefdinir concentration (50-450 mg/L) was studied using a Box-Behnken design. The factors were studied as a result of their effect on cell dry weight (R1; g/L), extended spectrum β-lactamase (ESBL) assay (R2; mm), P450 activity (R3; U/mL) and degradation (R4; %). Maximum values of R1, R2, R3 and R4 were obtained at central values of all the parameters. The isolated yeast strain efficiently degraded 84% of 250 mg L⁻¹ of cefdinir within 6 days with a half-life of 2.97 days and degradation rate constant of 0.2335 per day. Pseudo-first-order model efficiently described the process. Among the various enzymes tested, the order of activity at the end of Day 4 was noted to be: cytochrome P450 (1.76 ± 0.03) > NADPH reductase (1.51 ± 0.20) > manganese peroxidase and amylase (0.66 ± 0.15; 0.66 ± 0.70). Intermediates were successfully characterized by liquid chromatography-mass spectrometry. The opening of the β-lactam ring involving ESBL activity was considered as one of the major steps in the cefdinir degradation process. Fourier transform-infrared spectroscopy analysis showed the absence of spectral vibrations between 1766 and 1519 cm⁻¹ confirming the complete removal of lactam ring during cefdinir degradation. The results of the present study are promising for the use of isolated yeast Candida sp. SMN04 as a potential bioremediation agent.
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Affiliation(s)
- A Selvi
- a School of Bio Sciences and Technology , VIT University , Vellore 632014 , Tamil Nadu , India
| | - Devlina Das
- a School of Bio Sciences and Technology , VIT University , Vellore 632014 , Tamil Nadu , India
| | - Nilanjana Das
- a School of Bio Sciences and Technology , VIT University , Vellore 632014 , Tamil Nadu , India
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31
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Banda J, Lakshmanan R, Vvs SP, Gudla SP, Prudhivi R. A highly sensitive method for the quantification of fludrocortisone in human plasma using ultra-high-performance liquid chromatography tandem mass spectrometry and its pharmacokinetic application. Biomed Chromatogr 2015; 29:1213-9. [PMID: 25611194 DOI: 10.1002/bmc.3410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 11/14/2014] [Accepted: 11/18/2014] [Indexed: 11/12/2022]
Abstract
A simple and high sensitive ultra-high-performance liquid chromatography tandem mass spectrometry method for the determination of fludrocortisone in human plasma was developed and validated as per guidelines. The analyte and internal standard (IS), fludrocortisone-d5 , were extracted from human plasma via liquid-liquid extraction using tert-butyl methyl ether. The chromatographic separation was achieved on a Chromolith RP18e column using a mixture of acetonitrile and 2 mm ammonium formate (70:30, v/v) as the mobile phase at a flow rate of 0.7 mL/min. Quantitation was performed on a triple quadrupole mass spectrometer employing electrospray ionization technique, operating in multiple reaction monitoring and positive ion mode. The precursors to product ion transitions monitored for fludrocortisone and IS were m/z 381.2 → 343.2 and 386.2 → 348.4, respectively. The assay was validated with linear range of 40-3000 pg/mL. The intra- and inter-day precisions (relative standard deviation) were within 0.49-7.13 and 0.83-5.87%, respectively. The proposed method was successfully applied to pharmacokinetic studies in humans.
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Affiliation(s)
- Jagadeesh Banda
- Bioanalytical Department, QPS Bioserve India Pvt. Ltd, Balanagar, Hyderabad-, 500 037, India
| | - Ramalingam Lakshmanan
- Bioanalytical Department, QPS Bioserve India Pvt. Ltd, Balanagar, Hyderabad-, 500 037, India
| | - Shiva Prasad Vvs
- Bioanalytical Department, QPS Bioserve India Pvt. Ltd, Balanagar, Hyderabad-, 500 037, India
| | - Srinibas Patro Gudla
- Bioanalytical Department, QPS Bioserve India Pvt. Ltd, Balanagar, Hyderabad-, 500 037, India
| | - Rosaiah Prudhivi
- Bioanalytical Department, QPS Bioserve India Pvt. Ltd, Balanagar, Hyderabad-, 500 037, India
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