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Kumar H, Obrai S. Ratiometric fluorescent sensing of melatonin based on inner filter effect and smartphone established detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123309. [PMID: 37716042 DOI: 10.1016/j.saa.2023.123309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/25/2023] [Accepted: 08/27/2023] [Indexed: 09/18/2023]
Abstract
Melatonin (MLT) is a crucial neurohormone having inhibitory effects over various types of cancer. In this work, 3,6-Diaminocarbazole (DAC), a fluorescent probe is utilized to detect MLT in a highly sensitive, selective and facile way. The unique feature of present work is that MLT is sensed by ratiometric fluorescent technique based on the inner filter effect (IFE) using DAC at an emission wavelength of 310 nm. As a result, a noticeable change in color from red to cyan is observed and the quantitative analysis of fluorescence signals at these wavelengths are used to detect MLT observing a linear relationship between the ratio of emission intensities and the concentration of MLT over a linear range of 0 to 78 μM. DAC can accurately measure the detailed quantity of MLT with a limit of detection of 30 nM and has proved to be an efficient sensing probe due to its excellent molar absorptivity and high photoluminescence quantum yield (PLQY). Sensing characterization was carried out UV-Vis, steady-state, and time- resolved fluorescence spectroscopic techniques. The smartphone app "RGB colour detector" value has been successfully linked with the considerable detectable color changes of DAC on addition of MLT. HOMO-LUMO have been calculated using DFT with B3LYP/6-31G(d,p) level and band gaps of 3.77 eV and 4.91 eV were found for DAC and MLT, respectively. Electrons are not allowed energetically to transfer from MLT to DAC, as is evident from their band gaps. Therefore, IFE can be considered the foremost method in fluorescence quenching of present investigation. The developed sensor was verified by spiking of MLT in human serum.
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Affiliation(s)
- Himanshu Kumar
- Department of Chemistry, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab 144011, India
| | - Sangeeta Obrai
- Department of Chemistry, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab 144011, India.
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2
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Evaluation of different internal standardization approaches for the quantification of melatonin in cell culture samples by multiple heart-cutting two dimensional liquid chromatography tandem mass spectrometry. J Chromatogr A 2021; 1663:462752. [PMID: 34954534 DOI: 10.1016/j.chroma.2021.462752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/04/2021] [Accepted: 12/14/2021] [Indexed: 11/23/2022]
Abstract
We evaluate here different analytical strategies for the chromatographic separation and determination of N-acetyl-5-methoxytryptamine (MEL) and its oxidative metabolites N1-acetyl-N2-formyl-5-methoxykynuramine (AFMK), N1-acetyl-5-methoxykynuramine (AMK) and cyclic 3-hydroxymelatonin (c3OHM) in cell culture samples. Two dimensional liquid chromatography (2D-LC) in the multiple heart-cutting mode was compared with regular 1D chromatographic separations of MEL and its oxidative metabolites. Our results showed that the use of trifluoroacetic acid (TFA) as mobile phase modifier was required to obtain a satisfactory resolution and peak shapes particularly for c3OHM. As TFA is not compatible with ESI ionization the application of the MHC mode was mandatory for a proper chromatographic separation. We evaluate also different internal standardization approaches based on the combined use of a surrogate standard (5-methoxytryptophol) and an internal standard (6-methoxytryptamine) for MEL quantification in cell culture samples obtaining unsatisfactory results both by 1D- and 2D-LC-ESI-MS/MS (from 9 ± 2 to 186 ± 38%). We demonstrate that only the application of isotope dilution Mass Spectrometry through the use of an in house synthesized 13C isotopically labelled analogue provided quantitative MEL recoveries both by using 1D- and 2D-LC-ESI-MS/MS (99±1 and 98±1. Respectively) in androgen-insensitive human prostate carcinoma PC3 cells.
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3
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Alessa H, Saber AL, Althakafy JT. Up-to-date studies regarding the determination of melatonin by chromatographic methods. Arch Pharm (Weinheim) 2021; 355:e2100378. [PMID: 34842297 DOI: 10.1002/ardp.202100378] [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: 09/28/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 11/09/2022]
Abstract
Melatonin is an indolic compound that has been reported in the literature to exist in human-based samples, vertebrates, vegetables, fruits, and pharmaceutical products. Melatonin is considered a dietary supplement and can regulate circadian rhythms, although it has not been classified as a drug by the US Food and Drug Administration. Several analytical methods have been used for its detection. This study aimed to summarize the recent outcomes of the chromatographic methods such as electrophoretic methods, gas chromatography, and liquid chromatography, which have been used for the determination of melatonin in the last three decades, with the focus on gas chromatography and high-performance liquid chromatography methods.
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Affiliation(s)
- Hussain Alessa
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Amr L Saber
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia.,Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Jalal T Althakafy
- Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
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4
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Mikhail IE, Tehranirokh M, Gooley AA, Guijt RM, Breadmore MC. Hyphenated sample preparation-electrospray and nano-electrospray ionization mass spectrometry for biofluid analysis. J Chromatogr A 2021; 1646:462086. [PMID: 33892255 DOI: 10.1016/j.chroma.2021.462086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 10/21/2022]
Abstract
Stand-alone electrospray ionization mass spectrometry (ESI-MS) has been advancing through enhancements in throughput, selectivity and sensitivity of mass spectrometers. Unlike traditional MS techniques which usually require extensive offline sample preparation and chromatographic separation, many sample preparation techniques are now directly coupled with stand-alone MS to enable outstanding throughput for bioanalysis. In this review, we summarize the different sample clean-up and/or analyte enrichment strategies that can be directly coupled with ESI-MS and nano-ESI-MS for the analysis of biological fluids. The overview covers the hyphenation of different sample preparation techniques including solid phase extraction (SPE), solid phase micro-extraction (SPME), slug flow micro-extraction/nano-extraction (SFME/SFNE), liquid extraction surface analysis (LESA), extraction electrospray, extraction using digital microfluidics (DMF), and electrokinetic extraction (EkE) with ESI-MS and nano-ESI-MS.
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Affiliation(s)
- Ibraam E Mikhail
- ARC Training Centre for Portable Analytical Separation Technologies (ASTech), Australia; Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia; Department of Analytical Chemistry, Faculty of Pharmacy, Mansoura University, 35516, Egypt
| | - Masoomeh Tehranirokh
- ARC Training Centre for Portable Analytical Separation Technologies (ASTech), Australia; Trajan Scientific and Medical, Ringwood, VIC, 3134, Australia
| | - Andrew A Gooley
- ARC Training Centre for Portable Analytical Separation Technologies (ASTech), Australia; Trajan Scientific and Medical, Ringwood, VIC, 3134, Australia
| | - Rosanne M Guijt
- ARC Training Centre for Portable Analytical Separation Technologies (ASTech), Australia; Centre for Regional and Rural Futures, Deakin University, Geelong, VIC, 3220, Australia
| | - Michael C Breadmore
- ARC Training Centre for Portable Analytical Separation Technologies (ASTech), Australia; Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
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5
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Danilovich ME, Alberto MR, Juárez Tomás MS. Microbial production of beneficial indoleamines (serotonin and melatonin) with potential application to biotechnological products for human health. J Appl Microbiol 2021; 131:1668-1682. [PMID: 33484616 DOI: 10.1111/jam.15012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 01/08/2021] [Accepted: 01/19/2021] [Indexed: 12/20/2022]
Abstract
Micro-organisms have showed the ability to produce biologically active compounds associated with neurotransmission in higher organisms. In particular, serotonin- and melatonin-producing microbes are valuable sources for the development of eco-friendly bioproducts. Serotonin and melatonin are indoleamines that have received special attention due to their positive effects on human health. These biomolecules exert a critical role in several physiological or pathological processes, including some mental and neurological disorders. This article includes a review of the microbial production of serotonin and melatonin, their functions in micro-organisms and their potential uses as therapeutic and/or preventive agents to improve human health. A description of the quantification methods employed to detect indoleamines and the evidence found concerning their microbial production at laboratory and industrial scale-for application in biotechnological products-is also provided. The microbial ability to synthesize beneficial indoleamines should be further studied and harnessed, to allow the development of sustainable bioprocesses to produce foods and pharmaceuticals for human health.
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Affiliation(s)
- M E Danilovich
- Instituto de Biotecnología Farmacéutica y Alimentaria (INBIOFAL)-CONICET, Tucumán, Argentina
| | - M R Alberto
- Instituto de Biotecnología Farmacéutica y Alimentaria (INBIOFAL)-CONICET, Tucumán, Argentina
| | - M S Juárez Tomás
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI)-CONICET, Tucumán, Argentina
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6
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Fanciulli G, Ruggeri RM, Grossrubatscher E, Calzo FL, Wood TD, Faggiano A, Isidori A, Colao A. Serotonin pathway in carcinoid syndrome: Clinical, diagnostic, prognostic and therapeutic implications. Rev Endocr Metab Disord 2020; 21:599-612. [PMID: 32152781 DOI: 10.1007/s11154-020-09547-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Carcinoid syndrome represents the most common functional syndrome that affects patients with neuroendocrine neoplasms. Its clinical presentation is really heterogeneous, ranging from mild and often misdiagnosed symptoms to severe manifestations, that significantly worsen the patient's quality of life, such as difficult-to-control diarrhoea and fibrotic complications. Serotonin pathway alteration plays a central role in the pathophysiology of carcinoid syndrome, accounting for most clinical manifestations and providing diagnostic tools. Serotonin pathway is complex, resulting in production of biologically active molecules such as serotonin and melatonin, as well as of different intermediate molecules and final metabolites. These activities require site- and tissue-specific catalytic enzymes. Variable expression and activities of these enzymes result in different clinical pictures, according to primary site of origin of the tumour. At the same time, the biochemical diagnosis of carcinoid syndrome could be difficult even in case of typical symptoms. Therefore, the accuracy of the diagnostic methods of assessment should be improved, also attenuating the impact of confounding factors and maybe considering new serotonin precursors or metabolites as diagnostic markers. Finally, the prognostic role of serotonin markers has been only evaluated for its metabolite 5-hydroxyindole acetic acid but, due to heterogeneous and biased study designs, no definitive conclusions have been achieved. The most recent progress is represented by the new therapeutic agent telotristat, an inhibitor of the enzyme tryptophan hydroxylase, which blocks the conversion of tryptophan in 5-hydroxy-tryptophan. The present review investigates the clinical significance of serotonin pathway in carcinoid syndrome, considering its role in the pathogenesis, diagnosis, prognosis and therapy.
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Affiliation(s)
- Giuseppe Fanciulli
- Department of Medical, Surgical and Experimental Sciences, University of Sassari - Endocrine Unit, AOU Sassari, Sassari, Italy
| | - Rosaria M Ruggeri
- Department of Clinical and Experimental Medicine, Unit of Endocrinology, University of Messina, Messina, Italy
| | | | - Fabio Lo Calzo
- Department of Clinical Medicine and Surgery, Endocrinology Unit, University Federico II, Naples, Italy
| | - Troy D Wood
- Department of Chemistry, University at Buffalo, Buffalo, NY, USA
| | | | - Andrea Isidori
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Annamaria Colao
- Department of Clinical Medicine and Surgery, Endocrinology Unit, University Federico II, Naples, Italy
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Socaciu AI, Ionuţ R, Socaciu MA, Ungur AP, Bârsan M, Chiorean A, Socaciu C, Râjnoveanu AG. Melatonin, an ubiquitous metabolic regulator: functions, mechanisms and effects on circadian disruption and degenerative diseases. Rev Endocr Metab Disord 2020; 21:465-478. [PMID: 32691289 DOI: 10.1007/s11154-020-09570-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The last four decades, we assist to an increasing scientific interest on melatonin, a circadian hormone, a metabolic regulator which influences not only plants' metabolism and their defense against pathogens but mostly the animals and humans' metabolic pathways, their response to circadian disruption, stress and burnout syndrome. In humans, as a hormonal regulator, produced in the pineal grand as well in mitochondria, melatonin is involved in different, complex intracellular signaling pathways, with antioxidant and immune stimulating effects, proving to act as a circadian synchronizer, as a preventive and therapeutic agent in many degenerative diseases, and especially in hormone-dependent cancers. Preclinical or clinical studies showed recently the mechanisms involved in regulating the cellular activity, its role in aging and circadian disturbances and impact on degenerative diseases. Melatonin proved to have an anti-inflammatory, antiapoptotic and powerful antioxidant effect by subtle mechanisms in mitochondrial metabolic pathways. This overview includes recent and relevant literature data related to the impact of endogenous and exogeneous melatonin on the prevention of cancer progression and treatment of various degenerative diseases. Metabolomics, an emerging new omics' technology, based on high performance liquid chromatography coupled with mass spectrometry is presented as an encouraging technique to fingerprint and realize a precise evaluation and monitoring of the turnover of melatonin and its metabolites in different pathological circumstances.
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Affiliation(s)
- Andreea Iulia Socaciu
- Department of Occupational Health, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Răzvan Ionuţ
- Department of Occupational Health, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Mihai Adrian Socaciu
- Department of Medical Imaging, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Andreea Petra Ungur
- Department of Occupational Health, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Maria Bârsan
- Department of Occupational Health, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Angelica Chiorean
- Department of Radiology, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
| | - Carmen Socaciu
- Department of Biochemistry, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Cluj-Napoca, Romania.
| | - Armand Gabriel Râjnoveanu
- Department of Occupational Health, University of Medicine and Pharmacy "Iuliu Haţieganu", Cluj-Napoca, Romania
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8
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Morcillo-Parra MÁ, Beltran G, Mas A, Torija MJ. Determination of melatonin by a whole cell bioassay in fermented beverages. Sci Rep 2019; 9:9120. [PMID: 31235891 PMCID: PMC6591416 DOI: 10.1038/s41598-019-45645-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 06/12/2019] [Indexed: 11/09/2022] Open
Abstract
Melatonin is a bioactive compound that is present in fermented beverages, such as wine and beer, at concentrations ranging from picograms to nanograms per mL of product. The purpose of this study was to optimize a novel fluorescent bioassay for detecting melatonin based on a cell line that contains the human melatonin receptor 1B gene and to compare these results with LC-MS/MS as a reference method. Conditions that could affect cell growth and detection (cell number per well, stimulation time, presence or absence of fetal bovine serum and adhesion of cells) were tested in the TANGO® cell line. Food matrices (wine and grape must) could not be directly used for the cell line due to low response. Therefore, for the determination of melatonin in food samples, an extraction procedure was required before conducting the assay. We demonstrated an improvement in melatonin determination by the cell-based bioassay due to increased sensitivity and specificity and improved quantification in complex matrices. Therefore, this method is a good alternative to determine melatonin content in some food samples, especially for those containing very low melatonin levels.
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Affiliation(s)
| | - Gemma Beltran
- Departament de Bioquimica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - Albert Mas
- Departament de Bioquimica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - María-Jesús Torija
- Departament de Bioquimica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i Virgili, Tarragona, Spain.
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9
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Muñiz-Calvo S, Guillamón JM, Domínguez I, Doménech-Carbó A. Detecting and Monitoring the Production of Melatonin and Other Related Indole Compounds in Different Saccharomyces Strains by Solid-State Electrochemical Techniques. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0699-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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10
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Rapid and sensitive analysis of melatonin by LC-MS/MS and its application to pharmacokinetic study in dogs. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2015.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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11
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Escrivá L, Manyes L, Barberà M, Martínez-Torres D, Meca G. Determination of melatonin in Acyrthosiphon pisum aphids by liquid chromatography-tandem mass spectrometry. JOURNAL OF INSECT PHYSIOLOGY 2016; 86:48-53. [PMID: 26778054 DOI: 10.1016/j.jinsphys.2016.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 01/11/2016] [Accepted: 01/13/2016] [Indexed: 06/05/2023]
Abstract
Melatonin is a hormone mainly involved in the regulation of circadian and seasonal rhythms in both invertebrates and vertebrates. Despite the identification of melatonin in many insects, its involvement in the insect seasonal response remains unclear. A liquid chromatography tandem mass spectrometry (LC-MS/MS) method has been developed for melatonin analysis in aphids (Acyrthosiphon pisum) for the first time. After comparing two different procedures and five extraction solvents, a sample preparation procedure with a mixture of methanol/water (50:50) was selected for melatonin extraction. The method was validated by analyzing melatonin recovery at three spiked concentrations (5, 50 and 100 pg/mg) and showed satisfactory recoveries (75-110%), and good repeatability, expressed as relative standard deviation (<10%). Limits of detection (LOD) and quantitation (LOQ) were 1 pg/mg and 5 pg/mg, respectively. Eight concentration levels were used for constructing the calibration curves which showed good linearity between LOQ and 200 times LOQ. The validated method was successfully applied to 26 aphid samples demonstrating its usefulness for melatonin determination in insects. This is -to our knowledge- the first identification of melatonin in aphids by LC-MS/MS.
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Affiliation(s)
- Laura Escrivá
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain.
| | - Lara Manyes
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
| | - Miquel Barberà
- Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Valencia, Spain
| | - David Martínez-Torres
- Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Valencia, Spain
| | - Guiseppe Meca
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
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Keijzer H, Smits MG, Duffy JF, Curfs LMG. Why the dim light melatonin onset (DLMO) should be measured before treatment of patients with circadian rhythm sleep disorders. Sleep Med Rev 2013; 18:333-9. [PMID: 24388969 DOI: 10.1016/j.smrv.2013.12.001] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 12/02/2013] [Accepted: 12/02/2013] [Indexed: 11/16/2022]
Abstract
Treatment of circadian rhythm sleep disorders (CRSD) may include light therapy, chronotherapy and melatonin. Exogenous melatonin is increasingly being used in patients with insomnia or CRSD. Although pharmacopoeias and the European food safety authority (EFSA) recommend administering melatonin 1-2 h before desired bedtime, several studies have shown that melatonin is not always effective if administered according to that recommendation. Crucial for optimal treatment of CRSD, melatonin and other treatments should be administered at a time related to individual circadian timing (typically assessed using the dim light melatonin onset (DLMO)). If not administered according to the individual patient's circadian timing, melatonin and other treatments may not only be ineffective, they may even result in contrary effects. Endogenous melatonin levels can be measured reliably in saliva collected at the patient's home. A clinically reliably DLMO can be calculated using a fixed threshold. Diary and polysomnographic sleep-onset time do not reliably predict DLMO or circadian timing in patients with CRSD. Knowing the patient's individual circadian timing by assessing DLMO can improve diagnosis and treatment of CRSD with melatonin as well as other therapies such as light or chronotherapy, and optimizing treatment timing will shorten the time required to achieve results.
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Affiliation(s)
- Henry Keijzer
- Department of Clinical Chemistry and Hematology, Rijnstate Hospital, Arnhem, The Netherlands; Governor Kremers Centre, University Maastricht, The Netherlands.
| | - Marcel G Smits
- Governor Kremers Centre, University Maastricht, The Netherlands; Centre for Sleep-Wake Disturbances and Chronobiology, Gelderse Vallei Hospital, Ede, The Netherlands
| | - Jeanne F Duffy
- Division of Sleep Medicine, Brigham & Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Leopold M G Curfs
- Governor Kremers Centre, University Maastricht, The Netherlands; Department of Clinical Genetics, Maastricht University Medical Centre, Maastricht, The Netherlands
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Roopin M, Yacobi YZ, Levy O. Occurrence, diel patterns, and the influence of melatonin on the photosynthetic performance of cultured Symbiodinium. J Pineal Res 2013; 55:89-100. [PMID: 23496383 DOI: 10.1111/jpi.12046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 01/25/2013] [Indexed: 12/20/2022]
Abstract
Dinoflagellata is the earliest phylum in which true circadian regulation of melatonin rhythms has been convincingly demonstrated. Here, diel profiling of melatonin in a cultured member of this phylum belonging to the genus Symbiodinium indicated that melatonin levels oscillate with significant nocturnal peaks. However, unlike in other previously studied dinoflagellate species, the diel rhythmicity of melatonin in Symbiodinium did not persist under constant dark conditions. Thus, the oscillating pattern of melatonin in Symbiodinium is presumed not to be driven by endogenous circadian control of melatonin production, but rather by changes in the daily photocycle, most likely through a mechanism involving the enhanced photo-consumption of melatonin by free radicals. Although direct interactions of melatonin with detrimental radicals have been previously studied in several basal species, including dinoflagellates, none of these investigations addressed the effects that this molecule may have on photosynthesis, a major source of radical species in unicellular algae. In the present work, real-time monitoring of oxygen evolution in Symbiodinium cultures indicated a significant decrease in photosynthesis rates upon treatment with various doses of melatonin. Analyses of chlorophyll a fluorescence and xanthophyll cycle activity confirmed this effect and further revealed that this slowdown may occur through an enhanced engagement of photoprotective mechanisms in melatonin-treated cells. These findings are of great importance as they demonstrate that in certain photoautotroph species, the interactions of elevated melatonin levels with photosynthesis may extend beyond the general purpose of antioxidant protection.
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Affiliation(s)
- Modi Roopin
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
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Roopin M, Levy O. Melatonin distribution reveals clues to its biological significance in basal metazoans. PLoS One 2012; 7:e52266. [PMID: 23300630 PMCID: PMC3530593 DOI: 10.1371/journal.pone.0052266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 11/12/2012] [Indexed: 12/25/2022] Open
Abstract
Although nearly ubiquitous in nature, the precise biological significance of endogenous melatonin is poorly understood in phylogenetically basal taxa. In the present work, we describe insights into the functional role of melatonin at the most “basal” level of metazoan evolution. Hitherto unknown morphological determinants of melatonin distribution were evaluated in Nematostella vectensis by detecting melatonin immunoreactivity and examining the spatial gene expression patterns of putative melatonin biosynthetic and receptor elements that are located at opposing ends of the melatonin signaling pathway. Immuno-melatonin profiling indicated an elaborate interaction with reproductive tissues, reinforcing previous conjectures of a melatonin-responsive component in anthozoan reproduction. In situ hybridization (ISH) to putative melatonin receptor elements highlighted the possibility that the bioregulatory effects of melatonin in anthozoan reproduction may be mediated by interactions with membrane receptors, as in higher vertebrates. Another intriguing finding of the present study pertains to the prevalence of melatonin in centralized nervous structures. This pattern may be of great significance given that it 1) identifies an ancestral association between melatonin and key neuronal components and 2) potentially implies that certain effects of melatonin in basal species may be spread widely by regionalized nerve centers.
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Affiliation(s)
- Modi Roopin
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
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15
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The Application and Validation of HybridSPE-Precipitation Cartridge Technology for the Rapid Clean-up of Serum Matrices (from Phospholipids) for the Clinical Analysis of Serotonin, Dopamine and Melatonin. Chromatographia 2012. [DOI: 10.1007/s10337-012-2330-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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High-performance liquid chromatography with fluorescence detection and ultra-performance liquid chromatography with electrospray tandem mass spectrometry method for the determination of indoleamine neurotransmitters and their metabolites in sea lamprey plasma. Anal Chim Acta 2012; 721:147-53. [DOI: 10.1016/j.aca.2012.01.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 01/13/2012] [Accepted: 01/15/2012] [Indexed: 11/18/2022]
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17
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Quantification of monoamine neurotransmitters and melatonin in sea lamprey brain tissues by high performance liquid chromatography–electrospray ionization tandem mass spectrometry. Talanta 2012; 89:383-90. [DOI: 10.1016/j.talanta.2011.12.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 12/15/2011] [Accepted: 12/16/2011] [Indexed: 11/23/2022]
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Wang AQ, Wei BP, Zhang Y, Wang YJ, Xu L, Lan K. An ultra-high sensitive bioanalytical method for plasma melatonin by liquid chromatography-tandem mass spectrometry using water as calibration matrix. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:2259-64. [PMID: 21727044 DOI: 10.1016/j.jchromb.2011.06.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 05/31/2011] [Accepted: 06/04/2011] [Indexed: 11/24/2022]
Abstract
For the endogenous substances with an ultra-low level in biological fluids, such as melatonin, the blank biological matrix is obviously not "blank". This problem leads to a serious issue of the bioanalytical methods development and validation by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). This work developed and validated an ultra-high sensitive bioanalytical method for plasma melatonin by LC-MS/MS using water as calibration matrix. The lower limit of quantitation of the method was verified to be 1.0 pg/mL and the method exhibited a linear range of 1-5000 pg/mL. Potential matrix effects, accuracy and precision were fully monitored and validated by two complementary quality control approaches respectively using water and the pooled plasma as matrix. The intra-run and inter-run precisions were less than 11.5% and 12.2%, respectively, and the relative error was below ± 13.8% for all of 5 quality control levels. The method was successfully applied to investigate the daytime (8:00 AM-8:00 PM) baseline level of endogenous plasma melatonin, as well as the pharmacokinetic profiles of exogenous melatonin after oral administration in beagle dogs.
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Affiliation(s)
- An-Qi Wang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, China
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de Almeida EA, Di Mascio P, Harumi T, Warren Spence D, Moscovitch A, Hardeland R, Cardinali DP, Brown GM, Pandi-Perumal SR. Measurement of melatonin in body fluids: standards, protocols and procedures. Childs Nerv Syst 2011; 27:879-91. [PMID: 21104186 PMCID: PMC3128751 DOI: 10.1007/s00381-010-1278-8] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 09/07/2010] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND PURPOSE The circadian rhythm of melatonin in saliva or plasma, or of the melatonin metabolite 6-sulfatoxymelatonin (a6MTs) in urine, is a defining feature of suprachiasmatic nucleus (SCN) function, the body's endogenous oscillatory pacemaker. The primary objective of this review is to ascertain the clinical benefits and limitations of current methodologies employed for detection and quantification of melatonin in biological fluids and tissues. DATA IDENTIFICATION A search of the English-language literature (Medline) and a systematic review of published articles were carried out. STUDY SELECTION Articles that specified both the methodology for quantifying melatonin and indicated the clinical purpose were chosen for inclusion in the review. DATA EXTRACTION The authors critically evaluated the methodological issues associated with various tools and techniques (e.g. standards, protocols, and procedures). RESULTS OF DATA SYNTHESIS Melatonin measurements are useful for evaluating problems related to the onset or offset of sleep and for assessing phase delays or advances of rhythms in entrained individuals. They have also become an important tool for psychiatric diagnosis, their use being recommended for phase typing in patients suffering from sleep and mood disorders. Additionally, there has been a continuous interest in the use of melatonin as a marker for neoplasms of the pineal region. Melatonin decreases such as found with aging are or post pinealectomy can cause alterations in the sleep/wake cycle. The development of sensitive and selective methods for the precise detection of melatonin in tissues and fluids has increasingly been shown to have direct relevance for clinical decision making. CONCLUSIONS Due to melatonin's low concentration, as well as the coexistence of numerous other compounds in the blood, the routine determination of melatonin has been an analytical challenge. The available evidence indicates however that these challenges can be overcome and consequently that evaluation of melatonin's presence and activity can be an accessible and useful tool for clinical diagnosis.
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Affiliation(s)
- Eduardo Alves de Almeida
- Departamento de Química e Ciências Ambientais, IBILCE, UNESP, Rua Cristóvão Colombo 2265, CEP 15054-000 São José do Rio Preto, SP Brazil
| | - Paolo Di Mascio
- Departamento de Bioquímica, Instituto de Química, USP Av. Prof. Lineu Prestes, 748, CEP 05513-970 São Paulo, SP Brazil
| | - Tatsuo Harumi
- Department of Anatomy, Asahikawa Medical College, Nishikagura, Asahikawa Japan
| | | | - Adam Moscovitch
- Sleep and Fatigue Institute, 106 Codsell Ave, Toronto, ON Canada M3H 3W1
| | - Rüdiger Hardeland
- Johann Friedrich Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Daniel P. Cardinali
- Departamento de Docencia e Investigación, Facultad de Ciencias Médicas, Pontificia Universidad Católica Argentina, 1107 Buenos Aires, Argentina
| | - Gregory M. Brown
- Centre for Addiction and Mental Health, 250 College Street, Toronto, ON Canada M5T 1R8
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Rodriguez-Naranjo MI, Gil-Izquierdo A, Troncoso AM, Cantos E, Garcia-Parrilla MC. Melatonin: A new bioactive compound in wine. J Food Compost Anal 2011. [DOI: 10.1016/j.jfca.2010.12.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Figueiredo EC, Sparrapan R, Sanvido GB, Santos MG, Zezzi Arruda MA, Eberlin MN. Quantitation of drugs via molecularly imprinted polymer solid phase extraction and electrospray ionization mass spectrometry: benzodiazepines in human plasma. Analyst 2011; 136:3753-7. [DOI: 10.1039/c1an15198c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Bonnefont-Rousselot D, Collin F. Melatonin: Action as antioxidant and potential applications in human disease and aging. Toxicology 2010; 278:55-67. [DOI: 10.1016/j.tox.2010.04.008] [Citation(s) in RCA: 222] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2010] [Revised: 04/09/2010] [Accepted: 04/16/2010] [Indexed: 12/14/2022]
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Römsing S, Bökman F, Bergqvist Y. Determination of melatonin in saliva using automated solid‐phase extraction, high‐performance liquid chromatography and fluorescence detection. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 66:181-90. [PMID: 16714247 DOI: 10.1080/00365510600548777] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
A sensitive bioanalytical method for the determination of melatonin in saliva by solid-phase extraction (SPE), high-performance liquid chromatography (HPLC) and fluorescence detection has been developed and validated. Saliva was collected with a Salivette sampling device (Sarstedt) and a mixed-mode SPE column was used for the extraction of melatonin and internal standard (N-acetyl-6-methoxytryptamine) from the saliva. Chromatographic separation was performed using a HyPurity C18 LC column (150 x 2.1 mm) with mobile phase acetonitrile-ammonium hydrogen carbonate buffer, 0.015 M, pH 6.8 (23:77, v/v). Excitation and emission wavelengths were set to 285 nm and 345 nm, respectively. The within-day precision for the method at 50 pmol/L was 7.9 % and the between-day precision was 10.5 %. The limit of quantification was 50 pmol/L.
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Affiliation(s)
- S Römsing
- Department of Clinical Chemistry, Falun Central Hospital, Falun, Sweden.
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25
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Arnao MB, Hernández-Ruiz J. Melatonin in Plants: More Studies are Necessary. PLANT SIGNALING & BEHAVIOR 2007; 2:381-2. [PMID: 19704606 PMCID: PMC2634219 DOI: 10.4161/psb.2.5.4260] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Accepted: 04/12/2007] [Indexed: 05/07/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine) is a biogenic indoleamine structurally related with other important substances such as tryptophan, serotonin, indole-3-acetic acid (IAA). In mammals, birds, reptiles and fish melatonin is a biological modulator of several timing (circadian) processes such as mood, sleep, sexual behavior, immunological status, etc. Since its discovery in plants in 1995 several physiological roles, including a possible role in flowering, circadian rhythms and photoperiodicity and as growth-regulator have been postulated. Recently, a possible role in rhizogenesis in lupin has also been proposed. Here, these actions of melatonin in plant development are commented on and some other interesting recent data concerning melatonin in plants are also discussed. The need for more investigation into melatonin and plants is presented as an obvious conclusion.
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Affiliation(s)
- Marino B Arnao
- Department of Plant Biology; University of Murcia; Murcia, Spain
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26
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Arnao MB, Hernández-Ruiz J. Melatonin promotes adventitious- and lateral root regeneration in etiolated hypocotyls of Lupinus albus L. J Pineal Res 2007; 42:147-52. [PMID: 17286746 DOI: 10.1111/j.1600-079x.2006.00396.x] [Citation(s) in RCA: 214] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Melatonin is a well-known animal substance, which has recently been detected in plant tissues. However, there are only a few studies concerning its possible physiological role in plants. In this paper, we investigate the possible effect of melatonin on the regeneration of lateral and adventious roots in etiolated hypocotyls of Lupinus albus L. compared with the effect of indole-3-acetic acid. We performed this study by measuring both molecules in roots. Six-day-old derooted lupin hypocotyls immersed in several melatonin or indole-3-acetic acid concentrations were used to induce roots. A macro- and microscopic study of the histological origin of the adventitious and lateral roots was made, while melatonin and indole-3-acetic acid in the roots were quantified using liquid chromatography with fluorescence detection. The data show that both melatonin and indole-3-acetic acid induced the appearance of root primordia from pericicle cells, modifying the pattern of distribution of adventitious or lateral roots, the time-course, the number and length of adventitious roots, and the number of lateral roots. Melatonin and indole-3-acetic acid were detected and quantified in lupin primary roots, where both molecules were present in similar concentrations. The physiological effect of exogenous melatonin as root promoter was demonstrated, its action being similar to that of indole-3-acetic acid.
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Affiliation(s)
- Marino B Arnao
- Department of Plant Biology (Plant Physiology), Faculty of Biology, University of Murcia, Murcia, Spain.
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27
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Arnao MB, Hernández-Ruiz J. The physiological function of melatonin in plants. PLANT SIGNALING & BEHAVIOR 2006; 1:89-95. [PMID: 19521488 PMCID: PMC2635004 DOI: 10.4161/psb.1.3.2640] [Citation(s) in RCA: 157] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2005] [Accepted: 03/15/2006] [Indexed: 05/20/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), a well-known animal hormone, was discovered in plants in 1995 but very little research into it has been carried out since. It is present in different parts of all the plant species studied, including leaves, stems, roots, fruits and seeds. This brief review will attempt to provide an overview of melatonin (its discovery, presence and functions in different organisms, biosynthetic route, etc.) and to compile a practically complete bibliography on this compound in plants. The common biosynthetic pathways shared by the auxin, indole-3-acetic, and melatonin suggest a possible coordinated regulation in plants. More specifically, our knowledge to date of the role of melatonin in the vegetative and reproductive physiology of plants is presented in detail. The most interesting aspects for future physiological studies are presented.
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Affiliation(s)
- Marino B Arnao
- Department of Plant Physiology; University of Murcia; Murcia, Spain
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28
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Abstract
In a recent study melatonin (N-acetyl-5-methoxytryptamine), a well-investigated animal molecule but minimally studied in plants, was seen to have a physiological role as growth-promoting molecule in lupin hypocotyls. In the present study, the role of melatonin as a growth promoter is extended to coleoptiles of canary grass, wheat, barley and oat, in which it shows a relative auxinic activity [with respect to indole-3-acetic acid (IAA), the main auxin in plants] of between 10 and 55%. In addition, melatonin is seen to have an important inhibitory growth effect on roots similar to that played by auxin. The quantitation by liquid chromatography with electrochemical detection and identification by tandem mass spectrometry of melatonin and IAA in etiolated coleoptiles of the monocots assayed showed that both compounds are present in similar levels in these tissues. These results point to the co-existence of auxin and melatonin in tissues and raises the possibility of their co-participation in some physiological actions as auxinic hormones in plants.
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29
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Kobayashi H, Kromminga A, Dunlop TW, Tychsen B, Conrad F, Suzuki N, Memezawa A, Bettermann A, Aiba S, Carlberg C, Paus R. A role of melatonin in neuroectodermal-mesodermal interactions: the hair follicle synthesizes melatonin and expresses functional melatonin receptors. FASEB J 2005; 19:1710-2. [PMID: 16030176 DOI: 10.1096/fj.04-2293fje] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Since mammalian skin expresses the enzymatic apparatus for melatonin synthesis, it may be an extrapineal site of melatonin synthesis. However, evidence is still lacking that this is really the case in situ. Here, we demonstrate melatonin-like immunoreactivity (IR) in the outer root sheath (ORS) of mouse and human hair follicles (HFs), which corresponds to melatonin, as shown by radioimmunoassay and liquid chromatography/tandem mass spectrometry (LC/MS/MS). The melatonin concentration in organ-cultured mouse skin, mouse vibrissae follicles, and human scalp HFs far exceeds the respective melatonin serum level and is significantly increased ex vivo by stimulation with norepinephrine (NE), the key stimulus for pineal melatonin synthesis. By real-time PCR, transcripts for the melatonin membrane receptor MT2 and for the nuclear mediator of melatonin signaling, retinoid orphan receptor alpha (ROR)alpha, are detectable in murine back skin. Transcript levels for these receptors fluctuate in a hair cycle-dependent manner, and are maximal during apoptosis-driven HF regression (catagen). Melatonin may play a role in hair cycle regulation, since its receptors (MT2 and RORalpha) are expressed in murine skin in a hair cycle-dependent manner, and because it inhibits keratinocyte apoptosis and down-regulates ERalpha expression. Therefore, the HF is both, a prominent extrapineal melatonin source, and an important peripheral melatonin target tissue. Regulated intrafollicular melatonin synthesis and signaling may play a previously unrecognized role in the endogenous controls of hair growth, for example, by modulating keratinocyte apoptosis during catagen and by desensitizing the HF to estrogen signaling. As a prototypic neuroectodermal-mesodermal interaction model, the HF can be exploited for dissecting the obscure role of melatonin in such interactions in peripheral tissues.
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Affiliation(s)
- Hiromi Kobayashi
- Department of Dermatology, University Hospital Schleswig-Holstein, Campus Lübeck, University of Lübeck, Lübeck, Germany
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30
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Hernández-Ruiz J, Cano A, Arnao MB. Melatonin: a growth-stimulating compound present in lupin tissues. PLANTA 2004; 220:140-4. [PMID: 15232696 DOI: 10.1007/s00425-004-1317-3] [Citation(s) in RCA: 152] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2004] [Accepted: 05/19/2004] [Indexed: 05/19/2023]
Abstract
Melatonin (N-acetyl-5-methoxi-tryptamine), a well-known animal hormone synthetised by the pineal gland, plays a key role in the circadian rhythm of vertebrates. An exhaustive bibliographical revision of studies on melatonin in plants published since 1990 points to very few studies (around 20), of which only 8 have a clear plant physiological focus. The data presented in this study demonstrate that melatonin plays a physiological role in plant tissues. Melatonin is seen to be a molecule that promotes vegetative growth in etiolated Lupinus albus L. hypocotyls, in a similar way to IAA. The measurements of melatonin and IAA in lupin hypocotyls by high-performance liquid chromatography with electrochemical detection, and their identification by tandem mass spectrometry, point to a different distribution of these molecules in etiolated hypocotyls.
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Grozav AG, Hutson TE, Zhou X, Bukowski RM, Ganapathi R, Xu Y. Rapid analysis of docetaxel in human plasma by tandem mass spectrometry with on-line sample extraction. J Pharm Biomed Anal 2004; 36:125-31. [PMID: 15351056 DOI: 10.1016/j.jpba.2004.05.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2004] [Revised: 05/09/2004] [Accepted: 05/14/2004] [Indexed: 10/26/2022]
Abstract
A simple, rapid, and sensitive analytical method for the measurement of docetaxel in human plasma was developed and validated. The method is based on positive electrospray ionization tandem mass spectrometry (ESI+-MS-MS) with on-line sample extraction. It uses paclitaxel as internal standard for calibration. The on-line sample extraction minimizes sample handling and is readily adopted for automation. Quantitation of plasma docetaxel was done by the multiple reaction monitoring (MRM) mode. The method had a linear calibration range of 1.00-3000 ng/mL with a correlation coefficient >0.9999. The limit of quantitation (LOQ) for docetaxel in plasma was 1.00 ng/mL. The on-line extraction recovery of docetaxel was between 86.1-94.7%, with %CV < or = 6.1%. This method has high accuracy (90.1-96.3%), and excellent intra-assay (0.6-3.8%) and inter-assay (2.0-5.7%) precision. Its applicability to clinical samples was demonstrated by measuring patient plasma samples after treatment of weekly docetaxel at 25 mg/m2 as 60-min infusion.
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Affiliation(s)
- Adrian G Grozav
- Department of Chemistry, Cleveland State University, 2399 Euclid Avenue, Cleveland, OH 44115, USA
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Yang S, Liu L, Gerson SL, Xu Y. Measurement of anti-cancer agent methoxyamine in plasma by tandem mass spectrometry with on-line sample extraction. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 795:295-307. [PMID: 14522034 DOI: 10.1016/s1570-0232(03)00594-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this work, we present the development and validation of a tandem mass spectrometry method for the quantitative determination of methoxyamine (CH3ONH2), a potential new chemotherapeutic agent, in human and mouse plasma. Methoxyamine together with the internal standard (I.S.) methoxyl-D3-amine was directly derivatized in plasma sample with a novel chemical agent 4-(N,N-diethylamino)benzaldehyde. The product solution was injected into an on-line Oasis HLB extraction column (2.1 mm x 20 mm) for analyte extraction. After the elution of extractives, the derivatized analytes were monitored by the positive-electrospray-ionization mass spectrometry (ESI-MS-MS). The structures of derivatized analytes were elucidated by fragmentation. Quantitation of plasma methoxyamine was carried out by the multiple reaction monitoring (MRM) mode. This method had a linear calibration range of 1.00-1000 ng/ml with a correlation coefficient of 0.9999 for methoxyamine in both human and mouse plasma. The limit of detection (LOD) and limit of quantification (LOQ) for methoxyamine in plasma were 0.150 and 0.500 ng/ml, respectively. It was demonstrated that the method had high recovery and accuracy (90.1-94.7 and 90.1-96.3%), as well as excellent intra- and inter-assay precision (2.2 and 3.7%), at three concentration levels (5.00, 50.0, 500 ng/ml). This method has been used to analyze the plasma levels of methoxyamine in samples obtained from male CD1 mice after bolus intraperitoneal injection of 2, 5 and 20mg methoxyamine hydrochloride (CH3ONH2.HCl) per kilogram mouse.
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Affiliation(s)
- Shuming Yang
- Department of Chemistry, Cleveland State University, Cleveland, OH 44115-2406, USA
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Souverain S, Rudaz S, Veuthey JL. Restricted access materials and large particle supports for on-line sample preparation: an attractive approach for biological fluids analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 801:141-56. [PMID: 14751782 DOI: 10.1016/j.jchromb.2003.11.043] [Citation(s) in RCA: 213] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An analytical process generally involves four main steps: (1) sample preparation; (2) analytical separation; (3) detection; and (4) data handling. In the bioanalytical field, sample preparation is often considered as the time-limiting step. Indeed, the extraction techniques commonly used for biological matrices such as liquid-liquid extraction (LLE) and solid-phase extraction (SPE) are achieved in the off-line mode. In order to perform a high throughput analysis, efforts have been engaged in developing a faster sample purification process. Among different strategies, the introduction of special extraction sorbents, such as the restricted access media (RAM) and large particle supports (LPS), allowing the direct and repetitive injection of complex biological matrices, represents a very attractive approach. Integrated in a liquid chromatography (LC) system, these extraction supports lead to the automation, simplification and speeding up of the sample preparation process. In this paper, RAM and LPS are reviewed and particular attention is given to commercially available supports. Applications of these extraction supports, are presented in single column and column-switching configurations, for the direct analysis of compounds in various biological fluids.
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Affiliation(s)
- S Souverain
- Laboratory of Pharmaceutical Analytical Chemistry, School of Pharmacy, University of Geneva, 20 Bd. d'Yvoy, 12114 Geneva, Switzerland
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Current literature in journal of mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2003; 38:347-356. [PMID: 12644999 DOI: 10.1002/jms.418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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35
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Souverain S, Eap C, Veuthey JL, Rudaz S. Automated LC-MS Method for the Fast Stereoselective Determination of Methadone in Plasma. Clin Chem Lab Med 2003; 41:1615-21. [PMID: 14708886 DOI: 10.1515/cclm.2003.245] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Methadone (MTD) is a chiral drug widely used for the treatment of opioid dependence for which a rapid analytical method for the determination of each enantiomer would be advantageous. In order to improve method sensitivity and to automate the entire analytical process, a column-switching configuration has been developed. An online extraction system coupled to a cellulose-based chiral stationary phase (CSP), namely Chiralcel OJ-R, was used and detection was performed by mass spectrometry. Fifty microl of plasma were injected into the liquid chromatography-mass spectrometry (LC-MS) system after addition of acetonitrile (ACN) containing methadone deuterated D9 (MTD-D9) (internal standard) and centrifugation. For the rapid extraction step, a large particle size support was selected. A baseline separation of MTD enantiomers was obtained in less than 12 min. Trueness and precision were evaluated with control samples at 500 ng/ml of (R,S)-methadone. Trueness values were 106.6% and 103.0% for (R)-MTD and (S)-MTD, respectively, with a coefficient of variation inferior to 2.5% for both compounds. Finally, a good concordance was found using this method for analysis of plasma samples from patients in maintenance treatment as compared to a previously described HPLC-UV method after liquid-liquid extraction.
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Affiliation(s)
- Sandrine Souverain
- Laboratory of Analytical Pharmaceutical Chemistry, School of Pharmacy, University of Geneva, Geneva, Switzerland
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