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Nestor L, De Bundel D, Vander Heyden Y, Smolders I, Van Eeckhaut A. Unravelling the brain metabolome: A review of liquid chromatography - mass spectrometry strategies for extracellular brain metabolomics. J Chromatogr A 2023; 1712:464479. [PMID: 37952387 DOI: 10.1016/j.chroma.2023.464479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/27/2023] [Accepted: 10/29/2023] [Indexed: 11/14/2023]
Abstract
The analysis of the brain extracellular metabolome is of interest for numerous subdomains within neuroscience. Not only does it provide information about normal physiological functions, it is even more of interest for biomarker discovery and target discovery in disease. The extracellular analysis of the brain is particularly interesting as it provides information about the release of mediators in the brain extracellular fluid to look at cellular signaling and metabolic pathways through the release, diffusion and re-uptake of neurochemicals. In vivo samples are obtained through microdialysis, cerebral open-flow microperfusion or solid-phase microextraction. The analytes of potential interest are typically low in concentration and can have a wide range of physicochemical properties. Liquid chromatography coupled to mass spectrometry has proven its usefulness in brain metabolomics. It allows sensitive and specific analysis of low sample volumes, obtained through different approaches. Several strategies for the analysis of the extracellular fluid have been proposed. The most widely used approaches apply sample derivatization, specific stationary phases and/or hydrophilic interaction liquid chromatography. Miniaturization of these methods allows an even higher sensitivity. The development of chiral metabolomics is indispensable, as it allows to compare the enantiomeric ratio of compounds and provides even more challenges. Some limitations continue to exist for the previously developed methods and the development of new, more sensitive methods remains needed. This review provides an overview of the methods developed for sampling and liquid chromatography-mass spectrometry analysis of the extracellular metabolome.
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Affiliation(s)
- Liam Nestor
- Research group Experimental Pharmacology (EFAR), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Dimitri De Bundel
- Research group Experimental Pharmacology (EFAR), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Yvan Vander Heyden
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling (FABI), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Ilse Smolders
- Research group Experimental Pharmacology (EFAR), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Ann Van Eeckhaut
- Research group Experimental Pharmacology (EFAR), Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium.
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Gniazdowska E, Goch W, Giebułtowicz J, Rudzki PJ. Replicates Number for Drug Stability Testing during Bioanalytical Method Validation-An Experimental and Retrospective Approach. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020457. [PMID: 35056772 PMCID: PMC8779260 DOI: 10.3390/molecules27020457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/07/2022] [Accepted: 01/07/2022] [Indexed: 11/27/2022]
Abstract
Background: The stability of a drug or metabolites in biological matrices is an essential part of bioanalytical method validation, but the justification of its sample size (replicates number) is insufficient. The international guidelines differ in recommended sample size to study stability from no recommendation to at least three quality control samples. Testing of three samples may lead to results biased by a single outlier. We aimed to evaluate the optimal sample size for stability testing based on 90% confidence intervals. Methods: We conducted the experimental, retrospective (264 confidence intervals for the stability of nine drugs during regulatory bioanalytical method validation), and theoretical (mathematical) studies. We generated experimental stability data (40 confidence intervals) for two analytes—tramadol and its major metabolite (O-desmethyl-tramadol)—in two concentrations, two storage conditions, and in five sample sizes (n = 3, 4, 5, 6, or 8). Results: The 90% confidence intervals were wider for low than for high concentrations in 18 out of 20 cases. For n = 5 each stability test passed, and the width of the confidence intervals was below 20%. The results of the retrospective study and the theoretical analysis supported the experimental observations that five or six repetitions ensure that confidence intervals fall within 85–115% acceptance criteria. Conclusions: Five repetitions are optimal for the assessment of analyte stability. We hope to initiate discussion and stimulate further research on the sample size for stability testing.
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Affiliation(s)
- Elżbieta Gniazdowska
- Łukasiewicz Research Network, Industrial Chemistry Institute, 8 Rydygiera, 01-793 Warsaw, Poland; or
- Department of Bioanalysis and Drugs Analysis, Doctoral School, Medical University of Warsaw, 61 Żwirki i Wigury, 02-091 Warsaw, Poland
| | - Wojciech Goch
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha, 02-097 Warsaw, Poland;
| | - Joanna Giebułtowicz
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha, 02-097 Warsaw, Poland;
| | - Piotr J. Rudzki
- Celon Pharma S.A., Bioanalytical Laboratory, 15 Marymoncka, 05-152 Kazuń Nowy, Poland
- Correspondence:
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Histamine in the Crosstalk Between Innate Immune Cells and Neurons: Relevance for Brain Homeostasis and Disease. Curr Top Behav Neurosci 2021; 59:261-288. [PMID: 34432259 DOI: 10.1007/7854_2021_235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Histamine is a biogenic amine playing a central role in allergy and peripheral inflammatory reactions and acts as a neurotransmitter and neuromodulator in the brain. In the adult, histamine is produced mainly by mast cells and hypothalamic neurons, which project their axons throughout the brain. Thus, histamine exerts a range of functions, including wakefulness control, learning and memory, neurogenesis, and regulation of glial activity. Histamine is also known to modulate innate immune responses induced by brain-resident microglia cells and peripheral circulating monocytes, and monocyte-derived cells (macrophages and dendritic cells). In physiological conditions, histamine per se causes mainly a pro-inflammatory phenotype while counteracting lipopolysaccharide-induced inflammation both in microglia, monocytes, and monocyte-derived cells. In turn, the activation of the innate immune system can profoundly affect neuronal survival and function, which plays a critical role in the onset and development of brain disorders. Therefore, the dual role of histamine/antihistamines in microglia and monocytes/macrophages is relevant for identifying novel putative therapeutic strategies for brain diseases. This review focuses on the effects of histamine in innate immune responses and the impact on neuronal survival, function, and differentiation/maturation, both in physiological and acute (ischemic stroke) and chronic neurodegenerative conditions (Parkinson's disease).
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Stand out from matrix: Ultra-sensitive LC-MS/MS method for determination of histamine in complex biological samples using derivatization and solid phase extraction. Talanta 2020; 225:122056. [PMID: 33592777 DOI: 10.1016/j.talanta.2020.122056] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/09/2020] [Accepted: 12/23/2020] [Indexed: 11/22/2022]
Abstract
The determination of low abundant endogenous components is a challenge for the clinical samples. Histamine, a crucial endogenous component, fulfils various regulatory and mediatory functions in human, and the change of content is a critical index for the diagnosis of some diseases, especially allergy, asthma, and anaphylactic shock. However, it is challenging to detect histamine because of the low stability and concentration in complex biological samples. Here we developed an ultra-sensitive and accurate LC-MS/MS quantification method based on derivatization, isotope dilution, and solid phase extraction. The derivatization of histamine with diisopropyl phosphite (DIPP) not only enhanced the retention on the LC column but also improved the ionization efficiency. Next, solid phase extraction was applied to remove the interference, which finally resulted in standing out of the trace histamine from the high contents of the matrix. The lowest limit of quantification (LLOQ) was 0.1 pg/mL that is enough low to determine the histamine in one cell and low nano-liter of serum. This approach was successfully applied for the quantification of histamine in clinical serum samples of asthma patients and mast cell treated with chemicals modulating histamine release.
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Nelis M, Decraecker L, Boeckxstaens G, Augustijns P, Cabooter D. Development of a HILIC-MS/MS method for the quantification of histamine and its main metabolites in human urine samples. Talanta 2020; 220:121328. [PMID: 32928382 DOI: 10.1016/j.talanta.2020.121328] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 02/08/2023]
Abstract
An LC-MS/MS method was developed enabling the separation and quantification of histamine and its main metabolites (imidazole acetaldehyde, imidazole acetic acid, methyl imidazole acetic acid, methyl histamine, acetyl histamine) in urine samples. A fast separation was achieved in 10 min on two HILIC columns connected in series by adopting a linear gradient followed by an isocratic hold. The sample preparation consisted of a simple dilution step wherein 10 μL of urine was diluted with acetonitrile (ACN) to a final volume comprising 95% ACN. For methyl imidazole acetic acid, an additional dilution step was incorporated due to its high natural levels. Hereafter, the samples were stored at -20 °C and centrifuged prior to injection. Matrix matched calibrators were unavailable due to the endogenous occurrence of the compounds of interest. The occurrence of matrix effects and the lack of labeled internal standards prompted the use of the standard addition method as a viable alternative to solvent calibration. The validation of the method entailed matrix effects, accuracy and precision and was performed in compliance with the recent guidelines on endogenous compounds issued by the International Conference of Harmonization (ICH). The method was then adopted for the quantification of histamine and its metabolites in human urine samples collected from healthy volunteers and patients suffering from gastrointestinal discomfort.
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Affiliation(s)
- Maxim Nelis
- KU Leuven, Laboratory for Pharmaceutical Analysis, Herestraat 49, 3000, Leuven, Belgium
| | - Lisse Decraecker
- KU Leuven, Translational Research in GastroIntestinal Disorders (TARGID), Herestraat 49, 3000, Leuven, Belgium
| | - Guy Boeckxstaens
- KU Leuven, Translational Research in GastroIntestinal Disorders (TARGID), Herestraat 49, 3000, Leuven, Belgium
| | - Patrick Augustijns
- KU Leuven, Drug Delivery and Disposition, Herestraat 49, 3000, Leuven, Belgium
| | - Deirdre Cabooter
- KU Leuven, Laboratory for Pharmaceutical Analysis, Herestraat 49, 3000, Leuven, Belgium.
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Liu F, Ruze A, Liu W, Xiong K, Yiming A. Metabonomic profiling of blood plasma from erectile dysfunction patients using 1H nuclear magnetic resonance spectroscopy. Acta Biochim Biophys Sin (Shanghai) 2020; 52:332-335. [PMID: 32072181 DOI: 10.1093/abbs/gmz170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 11/09/2018] [Accepted: 12/05/2018] [Indexed: 11/12/2022] Open
Affiliation(s)
- Fengxia Liu
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Urumqi 830011, China
| | - Abudureyimujiang Ruze
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Urumqi 830011, China
| | - Wenjuan Liu
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Urumqi 830011, China
| | - Kun Xiong
- Department of Human Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha 410013, China
| | - Adilijiang Yiming
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Urumqi 830011, China
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7
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Parrot S, Pavón Vergés M, Perrot-Minnot MJ, Denoroy L. External Influences on Invertebrate Brain Histamine and Related Compounds via an Automated Derivatization Method for Capillary Electrophoresis. ACS Chem Neurosci 2017; 8:1839-1846. [PMID: 28617575 DOI: 10.1021/acschemneuro.7b00025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Histamine has been shown to modulate visual system and photic behavior in arthropods. However, few methods are available for the direct quantification of histamine and its precursor and metabolites in arthropod brain. In this work, a method for the separation of histamine, its precursor histidine, and its metabolite N-methyl-histamine from brain extracts of a freshwater crustacean has been developed using capillary electrophoresis with laser-induced fluorescence detection. Molecules were tagged on their primary amine function with naphthalene-2,3-dicarboxaldehyde, but derivatized histamine and N-methyl-histamine exhibited poor stability in contrast to derivatized histidine. To overcome this limitation, an automated derivatization performed within the capillary electrophoresis instrument was optimized and quantitatively validated. The limits of detection were 50, 30, and 60 nmol/L for histidine, histamine, and N-methyl-histamine, respectively. This study reports, for the first time, the amounts of histamine and its related compounds in brain extracts from populations of the freshwater amphipod Gammarus fossarum, and shows that these amounts vary mainly according to population and season, but are not affected by an experimental electrical shock.
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Affiliation(s)
- Sandrine Parrot
- INSERM U1028;
CNRS UMR 5292; Université Lyon 1; Lyon Neuroscience Research
Center, NeuroDialyTics Unit, Lyon F-69000, France
| | - Mónica Pavón Vergés
- INSERM U1028;
CNRS UMR 5292; Université Lyon 1; Lyon Neuroscience Research
Center, NeuroDialyTics Unit, Lyon F-69000, France
| | | | - Luc Denoroy
- INSERM U1028;
CNRS UMR 5292; Université Lyon 1; Lyon Neuroscience Research
Center, NeuroDialyTics Unit, Lyon F-69000, France
- CNRS UMR5292; INSERM
U1028; Université Lyon 1; Lyon Neuroscience Research Center,
BioRaN, Lyon, F-69000, France
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8
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Chen J, Hou W, Han B, Liu G, Gong J, Li Y, Zhong D, Liao Q, Xie Z. Target-based metabolomics for the quantitative measurement of 37 pathway metabolites in rat brain and serum using hydrophilic interaction ultra-high-performance liquid chromatography-tandem mass spectrometry. Anal Bioanal Chem 2016; 408:2527-42. [PMID: 26873199 DOI: 10.1007/s00216-016-9352-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/14/2016] [Accepted: 01/20/2016] [Indexed: 11/28/2022]
Abstract
Amino acids, neurotransmitters, purines, and pyrimidines are bioactive molecules that play fundamental roles in maintaining various physiological functions. Their metabolism is closely related to the health, growth, development, reproduction, and homeostasis of organisms. Most recently, comprehensive measurements of these metabolites have shown their potential as innovative approaches in disease surveillance or drug intervention. However, simultaneous measurement of these metabolites presents great difficulties. Here, we report a novel quantitative method that uses hydrophilic interaction ultra-high-performance liquid chromatography-tandem mass spectrometry (HILIC-UPLC-MS/MS), which is highly selective, high throughput, and exhibits better chromatographic behavior than existing methods. The developed method enabled the rapid quantification of 37 metabolites, spanning amino acids, neurotransmitters, purines, and pyrimidines pathways, within 6.5 min. The compounds were separated on an ACQUITY UPLC® BEH Amide column. Serum and brain homogenate were extracted by protein precipitation. The intra- and interday precision of all of the analytes was less than 11.34 %, and the accuracy was between -11.74 and 11.51 % for all quality control (QC) levels. The extraction recoveries of serum ranged from 84.58 % to 116.43 % and those of brain samples from 80.80 % to 119.39 %, while the RSD was 14.61 % or less for all recoveries. This method was used to successfully characterize alterations in the rat brain and, in particular, their dynamics in serum. The following study was performed to simultaneously test global changes of these metabolites in a serotonin antagonist p-chlorophenylalanine (PCPA)-induced anxiety and insomnia rat model to understand the effect and mechanism of PCPA. Taken together, these results show that the method is able to simultaneously monitor a large panel of metabolites and that this protocol may represent a metabolomic method to diagnose toxicological and pathophysiological states.
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Affiliation(s)
- Jiahui Chen
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510407, China
| | - Waner Hou
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510407, China
| | - Bo Han
- School of Pharmacy, Shihezi University, Shihezi, 832000, China
| | - Guanghui Liu
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510407, China
| | - Jin Gong
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510407, China
| | - Yemeng Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Danmin Zhong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Qiongfeng Liao
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510407, China.
| | - Zhiyong Xie
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China. .,Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, 421001, China.
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Chen R, Deng Y, Yang L, Wang J, Xu F. Determination of Histamine by High-Performance Liquid Chromatography After Precolumn Derivatization with o-Phthalaldehyde-Sulfite. J Chromatogr Sci 2015; 54:547-53. [PMID: 26688564 DOI: 10.1093/chromsci/bmv185] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Indexed: 02/07/2023]
Abstract
A fast and sensitive method was developed for in vivo determination of histamine in the brain microdialysate by reverse ion pair chromatography with electrochemical detection. The microdialysates were derivatized with o-phthalaldehyde and sodium sulfite, and separation was achieved using isocratic elution within 10 min. The separation was performed in an Agilent Eclipse Plus C18 column (3.0 × 150 mm, particle size 3.5 μm), and the mobile phase consisted of 100 mM monosodium phosphate (pH 6.0), 500 mg L(-1) OSA and 20% methanol (v/v). The linearity (R(2)) was found to be >0.999, with a range from 2 to 50 nM and excellent repeatability (relative standard deviation, 2.29-6.04%), and the limit of detection was 0.4 nM. This method was successfully applied to analyze the extracellular concentration of histamine in the hypothalamus of rats, with probe recovery calculated in vivo.
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Affiliation(s)
- Rongxiang Chen
- Research Center for Medicine and Biology, Zunyi Medical University, Zunyi, Guizhou, 563003, P. R. China Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, Hubei 430071, P. R. China
| | - Yinghua Deng
- Department of Chemistry and Life Science, Hubei University of Education, Wuhan, Hubei 430205, P. R. China
| | - Liu Yang
- Department of Chemistry and Life Science, Hubei University of Education, Wuhan, Hubei 430205, P. R. China
| | - Jie Wang
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, Hubei 430071, P. R. China
| | - Fuqiang Xu
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, Hubei 430071, P. R. China Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei 430074, P. R. China
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Abstract
Sensitive and reliable analysis of endogenous compounds is critically important for many physiological and pathological studies. Methods based on LC–MS have progressed to become the method of choice for analyzing endogenous compounds. However, the analysis can be challenging due to various factors, including inherent low concentrations in biological samples, low ionization efficiency, undesirable chromatographic behavior and interferences of complex biological. The integration of chemical derivatization with LC–MS could enhance its capabilities in sensitivity and selectivity, and extend its application to a wider range of analytes. In this article, we will review the derivatization strategies in the LC–MS analysis of various endogenous compounds, and provide applications highlighting the impact of these important techniques in the evaluation of pathological events.
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Chimalakonda KC, Pang E, Weaver JL, Howard KE, Patel V, Boyne MT. Development and validation of a liquid-chromatography tandem mass spectrometry method to determine in vitro and in vivo histamine release. J Pharm Biomed Anal 2015; 102:494-9. [DOI: 10.1016/j.jpba.2014.10.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 10/12/2014] [Accepted: 10/14/2014] [Indexed: 02/02/2023]
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Eiriz MF, Valero J, Malva JO, Bernardino L. New insights into the role of histamine in subventricular zone-olfactory bulb neurogenesis. Front Neurosci 2014; 8:142. [PMID: 24982610 PMCID: PMC4058902 DOI: 10.3389/fnins.2014.00142] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 05/21/2014] [Indexed: 11/21/2022] Open
Abstract
The subventricular zone (SVZ) contains neural stem cells (NSCs) that generate new neurons throughout life. Many brain diseases stimulate NSCs proliferation, neuronal differentiation and homing of these newborns cells into damaged regions. However, complete cell replacement has never been fully achieved. Hence, the identification of proneurogenic factors crucial for stem cell-based therapies will have an impact in brain repair. Histamine, a neurotransmitter and immune mediator, has been recently described to modulate proliferation and commitment of NSCs. Histamine levels are increased in the brain parenchyma and at the cerebrospinal fluid (CSF) upon inflammation and brain injury, thus being able to modulate neurogenesis. Herein, we add new data showing that in vivo administration of histamine in the lateral ventricles has a potent proneurogenic effect, increasing the production of new neuroblasts in the SVZ that ultimately reach the olfactory bulb (OB). This report emphasizes the multidimensional effects of histamine in the modulation of NSCs dynamics and sheds light into the promising therapeutic role of histamine for brain regenerative medicine.
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Affiliation(s)
- Maria F Eiriz
- Center for Neuroscience and Cell Biology of Coimbra, University of Coimbra (CNC-UC) Coimbra, Portugal
| | - Jorge Valero
- Center for Neuroscience and Cell Biology of Coimbra, University of Coimbra (CNC-UC) Coimbra, Portugal
| | - João O Malva
- Faculty of Medicine, Institute of Biomedical Imaging and Life Sciences (IBILI), University of Coimbra Coimbra, Portugal
| | - Liliana Bernardino
- Faculty of Health Sciences, Health Sciences Research Center, University of Beira Interior Covilhã, Portugal
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Pan Y, Li J, Li X, Chen J, Bai G. Determination of Free Amino Acids in Isatidis Radix By HILIC-UPLC-MS/MS. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.1.197] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Benitex Y, McNaney CA, Luchetti D, Schaeffer E, Olah TV, Morgan DG, Drexler DM. Addressing the need for biomarker liquid chromatography/mass spectrometry assays: a protocol for effective method development for the bioanalysis of endogenous compounds in cerebrospinal fluid. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2013; 27:1882-1886. [PMID: 23857934 DOI: 10.1002/rcm.6639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 05/24/2013] [Accepted: 05/27/2013] [Indexed: 06/02/2023]
Abstract
RATIONALE Research on disorders of the central nervous system (CNS) has shown that an imbalance in the levels of specific endogenous neurotransmitters may underlie certain CNS diseases. These alterations in neurotransmitter levels may provide insight into pathophysiology, but can also serve as disease and pharmacodynamic biomarkers. To measure these potential biomarkers in vivo, the relevant sample matrix is cerebrospinal fluid (CSF), which is in equilibrium with the brain's interstitial fluid and circulates through the ventricular system of the brain and spinal cord. Accurate analysis of these potential biomarkers can be challenging due to low CSF sample volume, low analyte levels, and potential interferences from other endogenous compounds. METHODS A protocol has been established for effective method development of bioanalytical assays for endogenous compounds in CSF. Database searches and standard-addition experiments are employed to qualify sample preparation and specificity of the detection thus evaluating accuracy and precision. RESULTS This protocol was applied to the study of the histaminergic neurotransmitter system and the analysis of histamine and its metabolite 1-methylhistamine in rat CSF. CONCLUSIONS The protocol resulted in a specific and sensitive novel method utilizing pre-column derivatization ultra high performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS), which is also capable of separating an endogenous interfering compound, identified as taurine, from the analytes of interest.
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Affiliation(s)
- Yulia Benitex
- Molecular Sciences and Candidate Optimization, Bioanalytical Research, Bristol-Myers Squibb Company, Research & Development, 5 Research Parkway, Wallingford, CT 06492, USA.
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15
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Five different columns in the analysis of basic drugs in hydrophilic interaction liquid chromatography. OPEN CHEM 2013. [DOI: 10.2478/s11532-013-0245-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractFive different columns (two silica, two cyanopropyl and one diol) were investigated in hydrophilic interaction liquid chromatography (HILIC). For the assessment of columns behavior in HILIC mode, six basic drugs (lamotrigine, thioridazine, clozapine, chlorpheniramine, pheniramine and sulpiride) were chosen. The assessment of the influence of the concentration of organic modifier on analytes’ retention on each column was provided by fitting the retention data into theoretical models. Utilizing the statistical analysis, the selection of the model that provides better prediction of the retention behavior was enabled. Dual RP-HILIC mechanism was suggested on cyanopropyl and diol columns, therefore the transition points between the two mechanisms on these columns were calculated. Furthermore, in order to investigate the impact of three factors simultaneously on the retention behavior of the analyzed substances on Betasil Silica column, chemometrically-aided empirical models were built. The experiments were conducted according to the matrix of Box-Behnken design and on the basis of the retention data, six quadratic models were obtained and their adequacy was confirmed using ANOVA test. The obtained coefficients of quadratic models enabled the elucidation of both single factor and factor interactions influence. This was also graphically presented in 3D response surface plots.
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16
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Cash KJ, Clark HA. Phosphorescent nanosensors for in vivo tracking of histamine levels. Anal Chem 2013; 85:6312-8. [PMID: 23767828 DOI: 10.1021/ac400575u] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Continuously tracking bioanalytes in vivo will enable clinicians and researchers to profile normal physiology and monitor diseased states. Current in vivo monitoring system designs are limited by invasive implantation procedures and biofouling, limiting the utility of these tools for obtaining physiologic data. In this work, we demonstrate the first success in optically tracking histamine levels in vivo using a modular, injectable sensing platform based on diamine oxidase and a phosphorescent oxygen nanosensor. Our new approach increases the range of measurable analytes by combining an enzymatic recognition element with a reversible nanosensor capable of measuring the effects of enzymatic activity. We use these enzyme nanosensors (EnzNS) to monitor the in vivo histamine dynamics as the concentration rapidly increases and decreases due to administration and clearance. The EnzNS system measured kinetics that match those reported from ex vivo measurements. This work establishes a modular approach to in vivo nanosensor design for measuring a broad range of potential target analytes. Simply replacing the recognition enzyme, or both the enzyme and nanosensor, can produce a new sensor system capable of measuring a wide range of specific analytical targets in vivo.
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Affiliation(s)
- Kevin J Cash
- Department of Pharmaceutical Sciences, Northeastern University, Boston, Massachusetts 02115, USA
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High-performance liquid chromatographic determination of histamine in biological samples: The cerebrospinal fluid challenge – A review. Anal Chim Acta 2013; 774:1-10. [DOI: 10.1016/j.aca.2012.12.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 12/23/2012] [Accepted: 12/26/2012] [Indexed: 11/24/2022]
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Bernardino L, Eiriz MF, Santos T, Xapelli S, Grade S, Rosa AI, Cortes L, Ferreira R, Bragança J, Agasse F, Ferreira L, Malva JO. Histamine stimulates neurogenesis in the rodent subventricular zone. Stem Cells 2012; 30:773-84. [PMID: 22893458 DOI: 10.1002/stem.1042] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Neural stem/progenitor cells present in the subventricular zone (SVZ) are a potential source of repairing cells after injury. Therefore, the identification of novel players that modulate neural stem cells differentiation can have a huge impact in stem cell-based therapies. Herein, we describe a unique role of histamine in inducing functional neuronal differentiation from cultured mouse SVZ stem/progenitor cells. This proneurogenic effect depends on histamine 1 receptor activation and involves epigenetic modifications and increased expression of Mash1, Dlx2, and Ngn1 genes. Biocompatible poly (lactic-co-glycolic acid) microparticles, engineered to release histamine in a controlled and prolonged manner, also triggered robust neuronal differentiation in vitro. Preconditioning with histamine-loaded microparticles facilitated neuronal differentiation of SVZ-GFP cells grafted in hippocampal slices and in in vivo rodent brain. We propose that neuronal commitment triggered by histamine per se or released from biomaterial-derived vehicles may represent a new tool for brain repair strategies.
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Affiliation(s)
- Liliana Bernardino
- Center for Neuroscience and Cell Biology, Faculty of Medicine, University of Coimbra, Largo Marquês de Pombal, 3004-504 Coimbra, Portugal.
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