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Atta NF, Galal A, El-Gohary AR. Novel designed electrochemical sensor for simultaneous determination of linezolid and meropenem pneumonia drugs. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115814] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Koosha E, Shamsipur M, Salimi F, Ramezani M. A microextraction method based on precipitation for the simultaneous separation and preconcentration of cadmium and lead before their determination by FAAS: experimental design methodology. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1788597] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Elnaz Koosha
- Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, Arak, Iran
| | | | - Fatemeh Salimi
- Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, Arak, Iran
| | - Majid Ramezani
- Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, Arak, Iran
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3
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Zhang Z, Zhang BS, Li KL, An Y, Liu C, Gou XY, Liang YM. Palladium-Catalyzed Amination/Dearomatization Reaction of Indoles and Benzofurans. J Org Chem 2020; 85:7817-7839. [PMID: 32441518 DOI: 10.1021/acs.joc.0c00475] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This report describes a palladium-catalyzed dearomatization and amination tandem reaction of 2,3-disubstituted indoles and benzofurans via the Catellani strategy. This reaction provides a new method for the construction of amino-substituted indoline-fused cyclic and benzofuran spiro compounds in good yields. The reaction has broad functional group compatibility and substrate scope.
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Affiliation(s)
- Zhe Zhang
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Bo-Sheng Zhang
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Kai-Li Li
- Lanzhou University Second Clinical Medical College, Lanzhou 730000, China
| | - Yang An
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Ce Liu
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xue-Ya Gou
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yong-Min Liang
- State key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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4
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Sharma MK, Dhakne P, Nn S, Reddy PA, Sengupta P. Paradigm Shift in the Arena of Sample Preparation and Bioanalytical Approaches Involving Liquid Chromatography Mass Spectroscopic Technique. ANAL SCI 2019; 35:1069-1082. [PMID: 31105088 DOI: 10.2116/analsci.19r003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Sample preparation is a highly important and integral part of bioanalysis for cleaning up the complex biological matrices and thereby minimizing matrix effect. Matrix effect can jeopardize the precise quantification and adversely affect the reliability of liquid chromatography-mass spectrometry-based analytical results by alteration of analyte ionization. Matrix components result in suppression or enhancement of the intensity of analyte response. In spite of the high specificity and selectivity of tandem mass spectrometry, a relatively higher concentration of coeluted matrix elements present in biofluids may alter the efficiency of quantification of a bioanalytical method. Numerous literature reports different types of sample preparation techniques employed in bioanalysis. In this review, the strategies for selection of the appropriate sample clean-up technique in bioanalysis are discussed extensively. A paradigm shift in the arena of sample preparation and bioanalytical approaches involving the liquid chromatography-mass spectroscopic technique has been scrutinized. Current trends and possible future advancements in the field of biological sample extraction methods, including instrumental techniques are analyzed in detail.
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Affiliation(s)
- Manish Kumar Sharma
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Ahmedabad
| | - Pooja Dhakne
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Ahmedabad
| | - Sidhartha Nn
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Ahmedabad
| | - P Ajitha Reddy
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Ahmedabad
| | - Pinaki Sengupta
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research-Ahmedabad
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5
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Wiraagni IA, Mohd MA, bin Abd Rashid R, Haron DEBM. Validation of a simple extraction procedure for bisphenol A identification from human plasma. PLoS One 2019; 14:e0221774. [PMID: 31581189 PMCID: PMC6776257 DOI: 10.1371/journal.pone.0221774] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 08/14/2019] [Indexed: 12/16/2022] Open
Abstract
The general population is exposed to bisphenol A (BPA) orally, parenterally, transdermally, and environmentally as a result of the use of BPA in food packaging, plastics, and personal care products. The majority of the population nowadays (91-99%) has detectable levels of BPA inside their body. In this study, we successfully performed an inexpensive, rapid, and simple protein precipitation procedure for extraction of BPA from human plasma, followed by analysis by LC-MS/MS. This method was specifically developed for handling large numbers of samples with minimum cost and volume of sample. The developed method was accurate, precise, and reproducible for quantification of BPA from human plasma samples in the concentration range of 10-2000 ng/mL. The method was performed on samples from 150 healthy volunteers who were enrolled in the study. The mean of observed BPA level was 2.22 ± 9.91 ng/mL. Higher BPA levels were observed for females compare to that of males (p-value = 0.002), the BPA levels were higher in participants 33 years of age and older compared to those less than 33 years of age (p-value = 0.000), then the BPA levels higher in subjects with tap water as source of drinking (p-value = 0.005). This method may be valuable for general risk assessment of BPA for a large and varied population because of its efficiency and economical aspects.
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Affiliation(s)
- Idha Arfianti Wiraagni
- Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- Department of Forensic Medicine and Medicolegal, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Mustafa Ali Mohd
- Shimadzu‐UM Center for Xenobiotics Studies (SUCXeS), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Rusdi bin Abd Rashid
- Department of Psychological Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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6
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Kokilambigai KS, Lakshmi KS, Sai Susmitha A, Seetharaman R, Kavitha J. Linezolid-A Review of Analytical Methods in Pharmaceuticals and Biological Matrices. Crit Rev Anal Chem 2019; 50:179-188. [PMID: 30957518 DOI: 10.1080/10408347.2019.1599709] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bacterial resistance to antibiotics is a growing phenomenon in the world. Considering the relevance of antimicrobials for population and the reduction in the registration of new antimicrobials by regulatory agencies, proper quality control is required to minimize the spread of bacterial resistance and ensure the effectiveness of a treatment, as well as safety for the patient. The recent addition to the antimicrobial world is the oxazolidinone classes of antibiotics, especially useful to treat infections caused by Gram-positive bacteria. Eperezolid and linezolid (LIN) are the two members of the oxazolidinone class of antibiotics. LIN was the first oxazolidinone approved by the Food and Drug Administration. The present review focuses on the analytical methods for the assessment of LIN in pharmaceuticals and biological matrices. The critical validation parameters like the linearity, limit of detection, limit of quantification are discussed for the individual method. Also the critical quality attributes like the sensitivity and the sample preparation techniques for bioanalytical methods are also discussed. Furthermore, some future trends that can be incorporated in the determination of similar drugs are also suggested.
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Affiliation(s)
- K S Kokilambigai
- Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM Institute of Science and Technology, Kancheepuram, Tamil Nadu, India
| | - K S Lakshmi
- Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM Institute of Science and Technology, Kancheepuram, Tamil Nadu, India
| | - A Sai Susmitha
- Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM Institute of Science and Technology, Kancheepuram, Tamil Nadu, India
| | - R Seetharaman
- Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM Institute of Science and Technology, Kancheepuram, Tamil Nadu, India
| | - J Kavitha
- Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM Institute of Science and Technology, Kancheepuram, Tamil Nadu, India
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Attia AK, Al-Ghobashy MA, El-Sayed GM, Kamal SM. Voltammetric monitoring of linezolid, meropenem and theophylline in plasma. Anal Biochem 2018; 545:54-64. [PMID: 29407178 DOI: 10.1016/j.ab.2018.01.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 01/01/2018] [Accepted: 01/12/2018] [Indexed: 01/23/2023]
Abstract
Treatment of healthcare associated Pneumonia (HCAP) caused by Methicillin-resistant Staphylococcus aureus (MRSA) requires therapeutic protocols formed of linezolid (LIN) either alone or in combination with meropenem (MERO) and theophylline (THEO). The inter-individual pharmacokinetic variations require the development of reliable therapeutic drug monitoring (TDM) tools especially in immunocompromised patients. A sensitive square wave voltammetric sensor using multiwalled carbon nanotubes (MWCNTs) modified carbon paste electrode in Britton-Robinson buffer was developed and validated. Experimental parameters such as pH, percentage of MWCNTs, and pre-concentration time were optimized. The sensor was employed at pH 11.0 for the determination of LIN in plasma within a concentration range of 2.5 × 10-8 - 8.0 × 10-6 mol L-1without interference from co-administered medications. On the other hand, simultaneous monitoring of LIN, MERO and THEO in plasma was feasible at pH 3.0 over concentration ranges of 4.0 × 10-7- 9.0 × 10-5, 8.0 × 10-7- 9.0 × 10-5 and 8.0 × 10-7 - 9.0 × 10-5 mol L-1, respectively. The performance of the proposed sensor was validated and the applicability for TDM has been demonstrated in plasma of healthy volunteers.
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Affiliation(s)
- Ali K Attia
- National Organization for Drug Control and Research, Cairo, Egypt.
| | - Medhat A Al-Ghobashy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt; Bioanalysis Research Group, School of Pharmacy, New Giza University, Egypt
| | - Ghada M El-Sayed
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Samah M Kamal
- National Organization for Drug Control and Research, Cairo, Egypt
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Development of a Robust UPLC Method for Simultaneous Determination of a Novel Combination of Sofosbuvir and Daclatasvir in Human Plasma: Clinical Application to Therapeutic Drug Monitoring. Int J Anal Chem 2018; 2018:6535816. [PMID: 30420886 PMCID: PMC6215565 DOI: 10.1155/2018/6535816] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 10/02/2018] [Indexed: 12/29/2022] Open
Abstract
A rapid and selective UPLC-DAD method was developed and validated for simultaneous analysis of the novel two-drug combination Darvoni® for the treatment of HCV: Sofosbuvir (SF)/Daclatasvir (DC) in human plasma using Ledipasvir as internal standard (IS) where the extraction process was conducted using automated SPE. Although the analysis of the combination after concomitant oral intake of two tablets of SF and DC individually was reported in literature, yet simultaneous analysis of this new combination in human plasma after a single oral dose was not previously reported. The adopted chromatographic separation was achieved on Waters® Acquity UPLC BEH C18 column (2.1 × 50 mm, 1.7 µm) as a stationary phase using isocratic elution using a mobile phase system of ammonium formate (pH 3.5; 5 mM) and acetonitrile (60:40 v/v) pumped at a flow rate of 0.2 mL.min−1. The UV detection was carried out at 261 nm for SF and 318 nm for DC and IS. SF was eluted at 1.123 min while DC was eluted at 3.179 min. The proposed chromatographic method was validated in accordance with guidelines of FDA for bioanalytical method validation. A linear range was achieved in the range of 25-6400 and 50-12800 ng.mL−1 for SF and DC, respectively. The proposed UPLC-DAD method was found to be accurate with % bias ranging between -10.0-7.2 for SF and -6.9-8.0 for DC. Also it was proved to be precise with % CV for intraday precision ranging between 3.8-9.6 for SF and 2.8-9.2 for DC whereas interday precision ranged between 5.1-9.3 for SF and 3.7-9.1 for DC. Moreover, % extraction recovery ranged between 90.0-107.2 for SF and 93.1-108.0 for DC using the suggested method. The adopted chromatographic method was successfully applied to the therapeutic drug monitoring of SF and DC in healthy volunteers after the oral intake of one Darvoni® tablet.
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Fonseca Pego AM, Franco de Oliveira SCWDSE, Franco de Oliveira T, Leyton V, Miziara I, Yonamine M. Cocaine toxicological findings in cases of violent death in Sao Paulo city - Brazil. J Forensic Leg Med 2018; 60:3-8. [PMID: 30189409 DOI: 10.1016/j.jflm.2018.08.005] [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: 06/04/2018] [Revised: 08/21/2018] [Accepted: 08/23/2018] [Indexed: 11/24/2022]
Abstract
Violence is a dreadful phenomenon spread throughout the world, resulting in unfortunate events that can ultimately cause death. It is known that some countries play a much worrying role in this scenario than others. Brazil is one of them. The present work has focused on identifying the use of cocaine in 105 postmortem cases arriving at the Institute of Legal Medicine of Sao Paulo (IML-SP), the largest Brazilian city. Both blood and hair samples have been analyzed through ultra-performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry (UPLC-ESI-MS/MS) in order to distinguish between recent or chronic cocaine use. The purpose of this work was to evaluate the proportion of cocaine use amongst violent individuals whose violence has ultimately led to their death. In order to do so, two previous methods, validated in-house, based on methanolic extraction for hair and protein precipitation for blood, have been used for this purpose and the final residue was analyzed through UPLC-ESI-MS/MS system. When looking at the demographics from the 105 postmortem cases analyzed, the results have shown the most critical age range to be between 18 and 25 years old and the least frequent between 37 and 45 years old. Gender wise, a rather extreme difference was found as 97 of the individuals were men and finally, considering the manner of death, the four-category criteria established appear to be fairly similar with 34 cases related to general violence and risk behavior, 26 to drug abuse suspicion, 23 to homicide resulting from opposition to police intervention and 22 to possible suicide.
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Affiliation(s)
- Ana Miguel Fonseca Pego
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
| | | | | | - Vilma Leyton
- Department of Legal Medicine, Ethics and Occupational Health, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Ivan Miziara
- Department of Legal Medicine, Ethics and Occupational Health, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil; Technical-Scientific Police Superintendency of the State of Sao Paulo, Sao Paulo, Brazil
| | - Mauricio Yonamine
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
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Liquid-liquid extraction pretreatment samples method used for pharmacokinetic study of rhubarb in rats after oral administrated. JOURNAL OF TRADITIONAL CHINESE MEDICAL SCIENCES 2018. [DOI: 10.1016/j.jtcms.2018.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Yang M, Luo J, Li K, Hu S, Ding T, Liu H, Sheng P, Yang M. Determination and pharmacokinetic study of guaiol in rat plasma by gas chromatography–mass spectrometry with selected ion monitoring. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1085:30-35. [DOI: 10.1016/j.jchromb.2018.03.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 01/10/2018] [Accepted: 03/25/2018] [Indexed: 10/17/2022]
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