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Sanches AM, C. Prete M, Matos R, Tarley CRT, Medeiros RA. Flow Injection Analysis System Coupled to Chronoamperometry and Boron-Doped Diamond Electrode for Determination of Synthetic Hormones 17α-Ethinylestradiol and Cyproterone Acetate. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2089677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Aline M. Sanches
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brasil
| | - Maiyara C. Prete
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brasil
| | - Roberto Matos
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brasil
| | - César R. Teixeira Tarley
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brasil
- Instituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica, Departamento de Química Analítica, Universidade Estadual de Campinas (UNICAMP), Instituto de Química, Campinas, Brasil
| | - Roberta A. Medeiros
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Londrina, Brasil
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2
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Ibrahim H, Temerk Y. A novel disposable electrochemical sensor based on modifying graphite pencil lead electrode surface with nanoacetylene black for simultaneous determination of antiandrogens flutamide and cyproterone acetate. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113836] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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3
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Desai N, Senta R. Simultaneous Rp-HPLC determination of salicylamide, salicylic acid and deferasirox in the bulk API dosages forms. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2014.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- N.C. Desai
- Division of Medicinal Chemistry, Department of Chemistry (UGC NON-SAP & DST-FIST Sponsored), Maharaja Krishnakumarsinhji Bhavnagar University, Mahatma Gandhi CampusBhavnagar 364 002India
| | - R.D. Senta
- Division of Medicinal Chemistry, Department of Chemistry (UGC NON-SAP & DST-FIST Sponsored), Maharaja Krishnakumarsinhji Bhavnagar University, Mahatma Gandhi CampusBhavnagar 364 002India
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Yan J, Xia Q, Webb P, Warbritton AR, Wamer WG, Howard PC, Boudreau M, Fu PP. Levels of retinyl palmitate and retinol in stratum corneum, epidermis and dermis of SKH-1 mice. Toxicol Ind Health 2016; 22:103-12. [PMID: 16716039 DOI: 10.1191/0748233706th252oa] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Vitamin A (retinol) regulates many biological functions, including epidermal cell growth. Retinyl palmitate (RP) is the major esterified form of retinol and the predominant component of retinoids in the skin; however, how endogenous levels of RP and retinol in the skin are affected by the age of the animal remains unknown. Furthermore, the levels of retinol and RP in the various skin layers- the stratum corneum, epidermis and dermis of skin- have not been reported. In this paper, we report the development of a convenient method for separation of the skin from SKH-1 female mice into the stratum corneum, epidermis, and dermis and the determination of the levels of RP and retinol in the three fractions by HPLC analysis. The total quantities of RP and retinol from the stratum corneum, epidermis, and dermis are comparable to those extracted from the same amount of intact skin from the same mouse. There was an age-related effect on the levels of RP and retinol in the skin and liver of female mice. An age-related effect was also observed in the stratum corneum, epidermis, and dermis. The levels of RP and retinol were highest in the epidermis of 20-week-old mice, and decreased when the age increased to 60- and 68-weeks. The total amount of RP at 20 weeks of age was found to be 1.52 ng/mg skin, and decreased about 4-fold at 60- and 68-weeks of age. A similar trend was found for the effects of age on the levels of retinol.
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Affiliation(s)
- Jian Yan
- National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR 72079, USA
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5
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Ruiz-Angel M, García-Alvarez-Coque M, Berthod A, Carda-Broch S. Are analysts doing method validation in liquid chromatography? J Chromatogr A 2014; 1353:2-9. [DOI: 10.1016/j.chroma.2014.05.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/16/2014] [Accepted: 05/19/2014] [Indexed: 01/05/2023]
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6
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Wright EP, Partridge MA, Padula MP, Gauci VJ, Malladi CS, Coorssen JR. Top-down proteomics: enhancing 2D gel electrophoresis from tissue processing to high-sensitivity protein detection. Proteomics 2014; 14:872-89. [PMID: 24452924 DOI: 10.1002/pmic.201300424] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 12/01/2013] [Accepted: 12/16/2013] [Indexed: 02/04/2023]
Abstract
The large-scale resolution and detection of proteins from complex native mixtures is fundamental to quantitative proteomic analyses. Comprehensive analyses depend on careful tissue handling and quantitative protein extraction and assessment. To most effectively link these analyses with an understanding of underlying molecular mechanisms, it is critical that all protein types - isoforms, splice variants and those with functionally important PTMs - are quantitatively extracted with high reproducibility. Methodological details concerning protein extraction and resolution using 2DE are discussed with reference to current in-gel protein detection limits. We confirm a significant increase in total protein, and establish that extraction, resolution and detection of phospho- and glycoproteins are improved following automated frozen disruption relative to manual homogenisation. The quality of 2DE protein resolution is established using third-dimension separations and 'deep imaging'; substantially more proteins/protein species than previously realised are actually resolved by 2DE. Thus, the key issue for effective proteome analyses is most likely to be detection, not resolution. Thus, these systematic methodological and technical advances further solidify the role of 2DE in top-down proteomics. By routinely assessing as much proteomic data from a sample as possible, 2DE enables more detailed and critical insights into molecular mechanisms underlying different physiological states.
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Affiliation(s)
- Elise P Wright
- Department of Molecular Physiology, Molecular Medicine Research Group, School of Medicine, University of Western Sydney, Penrith, NSW, Australia
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7
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Bouabidi A, Talbi M, Bourichi H, Bouklouze A, El Karbane M, Boulanger B, Brik Y, Hubert P, Rozet E. Flexibility and applicability of β-expectation tolerance interval approach to assess the fitness of purpose of pharmaceutical analytical methods. Drug Test Anal 2012; 4:1014-27. [PMID: 22615163 DOI: 10.1002/dta.1345] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/06/2012] [Accepted: 02/27/2012] [Indexed: 11/10/2022]
Abstract
An innovative versatile strategy using Total Error has been proposed to decide about the method's validity that controls the risk of accepting an unsuitable assay together with the ability to predict the reliability of future results. This strategy is based on the simultaneous combination of systematic (bias) and random (imprecision) error of analytical methods. Using validation standards, both types of error are combined through the use of a prediction interval or β-expectation tolerance interval. Finally, an accuracy profile is built by connecting, on one hand all the upper tolerance limits, and on the other hand all the lower tolerance limits. This profile combined with pre-specified acceptance limits allows the evaluation of the validity of any quantitative analytical method and thus their fitness for their intended purpose. In this work, the approach of accuracy profile was evaluated on several types of analytical methods encountered in the pharmaceutical industrial field and also covering different pharmaceutical matrices. The four studied examples depicted the flexibility and applicability of this approach for different matrices ranging from tablets to syrups, different techniques such as liquid chromatography, or UV spectrophotometry, and for different categories of assays commonly encountered in the pharmaceutical industry i.e. content assays, dissolution assays, and quantitative impurity assays. The accuracy profile approach assesses the fitness of purpose of these methods for their future routine application. It also allows the selection of the most suitable calibration curve, the adequate evaluation of a potential matrix effect and propose efficient solution and the correct definition of the limits of quantification of the studied analytical procedures.
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Affiliation(s)
- A Bouabidi
- Analytical Chemistry Laboratory, CIRM, Institute of Pharmacy, University of Liège, Belgium
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8
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Simultaneous online SPE-LC-MS/MS quantification of six widely used synthetic progestins in human plasma. Anal Bioanal Chem 2011; 403:961-72. [DOI: 10.1007/s00216-011-5612-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/22/2011] [Accepted: 11/24/2011] [Indexed: 12/11/2022]
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9
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Shou M, Galinada WA, Wei YC, Tang Q, Markovich RJ, Rustum AM. Development and validation of a stability-indicating HPLC method for simultaneous determination of salicylic acid, betamethasone dipropionate and their related compounds in Diprosalic Lotion®. J Pharm Biomed Anal 2009; 50:356-61. [DOI: 10.1016/j.jpba.2009.05.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 05/06/2009] [Accepted: 05/14/2009] [Indexed: 11/24/2022]
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10
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Hubert P, Nguyen-Huu JJ, Boulanger B, Chapuzet E, Cohen N, Compagnon PA, Dewé W, Feinberg M, Laurentie M, Mercier N, Muzard G, Valat L, Rozet E. Harmonization of strategies for the validation of quantitative analytical procedures: a SFSTP proposal part IV. Examples of application. J Pharm Biomed Anal 2008; 48:760-71. [PMID: 18768284 DOI: 10.1016/j.jpba.2008.07.018] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Accepted: 07/21/2008] [Indexed: 11/27/2022]
Abstract
A harmonized approach for the validation of analytical methods based on accuracy profile was introduced by a SFSTP commission on the validation of analytical procedure. This fourth and last document aims at illustrating this methodology and the statistics used. Therefore the validation of real case methods are proposed such as methods for the quality control of drugs, for the quantitation of impurities in drug substances, for bioanalysis or for the determination of nutriments. Furthermore, different types of analytical methods are used in order to demonstrate the applicability of the proposed approach to a wide range of methods such as liquid chromatography (LC-UV, LC-MS), spectrophotometry or ELISA.
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Affiliation(s)
- Ph Hubert
- Laboratory of Analytical Chemistry, Bioanalytical Chemistry Research Unit, Institute of Pharmacy, University of Liège, CHU, B36, B-4000 Liège, Belgium.
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11
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Butt RH, Pfeifer TA, Delaney A, Grigliatti TA, Tetzlaff WG, Coorssen JR. Enabling Coupled Quantitative Genomics and Proteomics Analyses from Rat Spinal Cord Samples. Mol Cell Proteomics 2007; 6:1574-88. [PMID: 17510048 DOI: 10.1074/mcp.m700083-mcp200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Translational research is progressing toward combined genomics and proteomics analyses of small and precious samples. In our analyses of spinal cord material, we systematically evaluated disruption and extraction techniques to determine an optimum process for the coupled analysis of RNA and protein from a single 5-mm segment of tissue. Analyses of these distinct molecular species were performed using microarrays and high resolution two-dimensional gels, respectively. Comparison of standard homogenization with automated frozen disruption (AFD) identified negligible differences in the relative abundance of genes (44) with all genes identified by either process. Analysis on either the Affymetrix or Applied Biosystems Inc. gene array platforms provided good correlations between the extraction techniques. In contrast, the AFD technique enabled identification of more unique proteins from spinal cord tissue than did standard homogenization. Furthermore use of an optimized CHAPS/urea extraction provided better protein recovery, as shown by quantitative two-dimensional gel analyses, than did solvent precipitation during TRIzol-based RNA extraction. Thus, AFD of tissue samples followed by protein and RNA isolation from separate aliquots of the frozen powdered sample is the most effective route to ensure full, quantitative analyses of both molecular entities.
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Affiliation(s)
- R Hussain Butt
- Department of Physiology and Biophysics, Hotchkiss Brain Institute, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada
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12
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Chéneau E, Henri J, Pirotais Y, Abjean JP, Roudaut B, Sanders P, Laurentie M. Liquid chromatography–electrospray tandem mass spectrometric method for quantification of monensin in plasma and edible tissues of chicken used in pharmacokinetic studies: Applying a total error approach. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 850:15-23. [PMID: 17141581 DOI: 10.1016/j.jchromb.2006.10.072] [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: 04/14/2006] [Revised: 07/17/2006] [Accepted: 10/31/2006] [Indexed: 11/24/2022]
Abstract
A liquid chromatography-tandem mass spectrometric (LC-MS/MS) method was developed and validated for use in pharmacokinetic studies in order to determine the concentrations of monensin in plasma and edible tissues of chicken. Two sample preparations were performed, one for determining monensin concentrations in plasma using acetonitrile for protein precipitation and another one for determining monensin concentrations in muscle, liver, and fat using methanol-water followed by a clean up on a solid-phase extraction cartridge. Sample extracts were injected into the LC-MS/MS system, and a gradient elution was performed on a C18 column. Narasin was used as internal standard. The LC-MS/MS method was validated using an approach based on accuracy profiles, and applicability of the method was demonstrated for the determination of monensin in chicken plasma, muscle, liver, and fat in a pharmacokinetic study.
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Affiliation(s)
- Estelle Chéneau
- Veterinary Drug Residues Unit, Laboratory for the Research and Investigation of Veterinary Drugs and Disinfectants, AFSSA Fougères, BP 90203, La Haute Marche, 35133 Javené, France.
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13
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De Beer TRM, Baeyens WRG, Vermeire A, Broes D, Remon JP, Vervaet C. Raman spectroscopic method for the determination of medroxyprogesterone acetate in a pharmaceutical suspension: validation of quantifying abilities, uncertainty assessment and comparison with the high performance liquid chromatography reference method. Anal Chim Acta 2007; 589:192-9. [PMID: 17418181 DOI: 10.1016/j.aca.2007.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Revised: 02/27/2007] [Accepted: 03/01/2007] [Indexed: 10/23/2022]
Abstract
An alternative fast and non-destructive validated Raman spectroscopic analytical procedure, requiring no sample preparation, was compared with the industrially applied HPLC reference method (Pfizer Manufacturing Belgium) for the quantitative determination of medroxyprogesterone acetate (MPA) in DepoProvera suspensions (150 mg mL(-1), Pfizer). The Raman calibration model was developed by plotting the peak intensity of the baseline-corrected and normalized spectral band (corrected by external standard measurements) between 1595 and 1620 cm(-1) against known MPA concentrations in standards. At this band, no spectral interferences from the suspension medium are observed. The most suitable model for the calibration data (straight line or higher order polynomial) was determined by evaluating the fit and predictive properties of the models. In a second step, the developed Raman spectroscopic analytical method was validated by calculating the accuracy profile on the basis of the analysis results of validation samples. Furthermore, based on the data of the accuracy profile, the measurement uncertainty was determined. Finally, as the aim of the alternative method is to replace the destructive, time-consuming HPLC method, requiring sample preparation, it needs to be demonstrated that the new Raman method performs at least as good as the HPLC method. Therefore, the performance (precision and bias) of both methods was compared. A second order polynomial calibration curve through the calibration data supplies the best predictive properties and gives an acceptable fit. From the accuracy profile, it was concluded that at the target concentration (150 mg mL(-1)), 95 out 100 future routine measurements will be included within the acceptance limits (5%). Comparison of the alternative method with the reference method at the target concentration indicates that the Raman method performs at least as good as the HPLC method for precision (repeatability and intermediate precision) and bias. The fast and non-destructive Raman method hence provides an alternative for the destructive and time-consuming HPLC procedure.
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Affiliation(s)
- T R M De Beer
- Laboratory of Drug Quality Control, Department of Pharmaceutical Analysis, Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
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14
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González AG, Herrador MA. Accuracy profiles from uncertainty measurements. Talanta 2006; 70:896-901. [PMID: 18970856 DOI: 10.1016/j.talanta.2006.02.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2005] [Revised: 12/29/2005] [Accepted: 02/08/2006] [Indexed: 11/17/2022]
Abstract
Accuracy profiles of chemical assays are introduced and derived from the uncertainty of the analytical result. The calculation of accuracy profiles is based on the estimation of the measurement uncertainty of the analytical assay from validation data. For the sake of illustration, a case study dealing with the spectrofluorimetric determination of quinine in tonic water is explained in detail.
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