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Pecheu CN, Tchieda VK, Tajeu KY, Jiokeng SLZ, Lesch A, Tonle IK, Ngameni E, Janiak C. Electrochemical Determination of Epinephrine in Pharmaceutical Preparation Using Laponite Clay-Modified Graphene Inkjet-Printed Electrode. Molecules 2023; 28:5487. [PMID: 37513359 PMCID: PMC10386127 DOI: 10.3390/molecules28145487] [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: 06/14/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Epinephrine (EP, also called adrenaline) is a compound belonging to the catecholamine neurotransmitter family. It can cause neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, Huntington's disease and amyotrophic lateral sclerosis. This work describes an amperometric sensor for the electroanalytical detection of EP by using an inkjet-printed graphene electrode (IPGE) that has been chemically modified by a thin layer of a laponite (La) clay mineral. The ion exchange properties and permeability of the chemically modified electrode (denoted La/IPGE) were evaluated using multi-sweep cyclic voltammetry, while its charge transfer resistance was determined by electrochemical impedance spectroscopy. The results showed that La/IPGE exhibited higher sensitivity to EP compared to the bare IPGE. The developed sensor was directly applied for the determination of EP in aqueous solution using differential pulse voltammetry. Under optimized conditions, a linear calibration graph was obtained in the concentration range between 0.8 µM and 10 μM. The anodic peak current of EP was directly proportional to its concentration, leading to detection limits of 0.34 μM and 0.26 μM with bare IPGE and La/IPGE, respectively. The sensor was successfully applied for the determination of EP in pharmaceutical preparations. Recovery rates and the effects of interfering species on the detection of EP were evaluated to highlight the selectivity of the elaborated sensor.
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Affiliation(s)
- Chancellin Nkepdep Pecheu
- Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Victor Kougoum Tchieda
- Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Kevin Yemele Tajeu
- Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Sherman Lesly Zambou Jiokeng
- Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Andreas Lesch
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale del Risorgimento 4, 40136 Bologna, Italy
| | - Ignas Kenfack Tonle
- Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Emmanuel Ngameni
- Laboratory of Analytical Chemistry, Faculty of Science, The University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany
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Shen C, Sheng ZG, Shao J, Tang M, Mao L, Huang CH, Zhang ZH, Zhu BZ. Mechanistic investigation of the differential synergistic neurotoxicity between pesticide metam sodium and copper or zinc. CHEMOSPHERE 2023; 328:138430. [PMID: 36963585 DOI: 10.1016/j.chemosphere.2023.138430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/21/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Epidemiological studies suggest neurological disorders have been associated with the co-exposure to certain pesticides and transition metals. The present study aims to investigate whether co-exposure to the widely-used pesticide metam sodium and copper (Cu2+) or zinc ion (Zn2+) is able to cause synergistic neurotoxicity in neural PC12 cells and its possible mechanism(s). We found that both metam/Cu2+ and metam/Zn2+ synergistically induced apoptosis, intracellular Cu2+/Zn2+ uptake, reactive oxygen species (ROS) accumulation, double-strand DNA breakage, mitochondrial membrane potential decrease, and nerve function disorder. In addition, metam/Cu2+ was shown to release cytochrome c and apoptosis-inducing factor (AIF) from mitochondria to cytoplasm and nucleus, respectively, and activate the caspase 9, 8, 3, 7. However, metam/Zn2+ induced caspase 7 activation and AIF translocation and mildly activated cytochrome c/caspase 9/caspase 3 pathway. Furthermore, metam/Cu2+ activated caspase 3/7 by the p38 pathway, whereas metam/Zn2+ did so via both the p38 and JNK pathways. These results demonstrated that metam/Cu2+ or metam/Zn2+ co-exposure cause synergistic neurotoxicity via different mechanisms, indicating a potential risk to human health when they environmentally co-exist.
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Affiliation(s)
- Chen Shen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Guo Sheng
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jie Shao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Miao Tang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Li Mao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chun-Hua Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Hui Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Department of Stomatology, Peking University Third Hospital, Beijing, 100191, China
| | - Ben-Zhan Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Joint Institute for Environmental Science, Research Center for Eco-Environmental Sciences and Hong Kong Baptist University, Hong Kong, China.
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Understanding the retention mechanisms of a reversed-phase/anion exchange/cation-exchange column for the separation of epinephrine and norepinephrine. J Pharm Biomed Anal 2023; 227:115273. [PMID: 36736111 DOI: 10.1016/j.jpba.2023.115273] [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: 10/31/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
In this paper, we investigated the retention mechanisms of a reversed-phase/anion-exchange/cation-exchange column (Acclaim trinity P1, Thermo Fisher Scientific) for the separation of epinephrine (EPI) from norepinephrine (NOE). The impact of the acetonitrile (ACN) content, pH, and salt concentration on the retention of these two catecholamines was studied under an isocratic mode with a mobile phase mixture of ACN and ammonium formate or acetate (pH 3 to pH 5). To better understand the retention mechanisms, several retention models were explored, including linear solvent strength, adsorption, quadratic, and mixed-mode models, using various chemical compounds in addition to EPI and NOE. The quadratic and mixed-mode models were the most appropriate to explain the column retention mechanisms according to the Akaike information criterion (AIC). The research showed the importance of the ACN content on the retention of compounds according to the quadratic model, and satisfactory resolution between EPI and NOE (>1.4) was achieved with 50% ACN content. The most important retention parameters were integrated in the mixed-mode model, namely ACN content, pH, and salt concentration. Using a three-factor Box-Behnken design (BBD), other optimal conditions were obtained to separate EPI and NOE with a resolution Rs > 1.5. The ACN content and salt concentrations of the aqueous part of the mobile phase were the parameters with the greatest impact on the separation performance of the stationary phase for both catecholamines. Finally, a rapid and simple separation of a mixture of EPI, NOE, and tetracaine was obtained using a mobile phase composed of ACN/ammonium formate (pH 4; 10 mM) (60:40, v/v), with a satisfactory resolution (>1.5) between the analyte peaks.
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Joseph T, Thomas T, Thomas N. Graphene Oxide Modified Carbon Paste Electrode for Handy and Ultra‐sensitive Determination of Epinephrine in the Presence of Uric and Ascorbic Acids. ELECTROANAL 2020. [DOI: 10.1002/elan.202060085] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Teena Joseph
- Department of Chemistry Nirmalagiri College Nirmalagiri, Kannur Kerala 670701
| | - Tony Thomas
- Department of Chemistry Deva Matha College Kuravilangad, Kottayam Kerala 686633
| | - Nygil Thomas
- Department of Chemistry Nirmalagiri College Nirmalagiri, Kannur Kerala 670701
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Abrantes Dias AS, Amaral Pinto JC, Magalhães M, Mendes VM, Manadas B. Analytical methods to monitor dopamine metabolism in plasma: Moving forward with improved diagnosis and treatment of neurological disorders. J Pharm Biomed Anal 2020; 187:113323. [DOI: 10.1016/j.jpba.2020.113323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 12/16/2022]
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Alkholief M, Kalam MA, Almomen A, Alshememry A, Alshamsan A. Thermoresponsive sol-gel improves ocular bioavailability of Dipivefrin hydrochloride and potentially reduces the elevated intraocular pressure in vivo. Saudi Pharm J 2020; 28:1019-1029. [PMID: 32792847 PMCID: PMC7414100 DOI: 10.1016/j.jsps.2020.07.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/01/2020] [Indexed: 12/17/2022] Open
Abstract
The present study involves the development of Dipivefrin hydrochloride (DV) containing Poloxamers (P407 and P188)-Carbopol-934 (CP) based thermoresponsive-gels for the management of elevated intraocular pressure (IOP). Optimal formulation was evaluated for gelation temperature (Tgel), physicochemical and viscoelastic properties, in-vitro gel dissolution and drug release studies. The in-vivo safety, precorneal retention, ocular pharmacokinetics and efficacy in reducing IOP were also evaluated. Tgel of DV-containing thermoresponsive-gels were between 35.1 and 38.9 °C and it was Poloxamers and CP concentrations dependent. The optimal formulation (F8), composed of 20% P407, 5% P188 and 0.15% CP (w/v), had a Tgel of 35 °C. Its viscosity indicated good flow at room temperature and ability to convert to gel at ocular temperature and the rheology studies revealed favorable characteristics for its ocular use. In precorneal retention experiment, F8 indicated significantly higher area under concentrations curves as compared to DV-aqueous suspension (DV-AqS). In-vivo ocular pharmacokinetics indicated a significant improvement in ophthalmic bioavailability of epinephrine (active form of DV). F8 was non-irritant to the eyes and showed a successful, continuous and superior ability to reduce IOP compared to DV-AqS in rabbits. In conclusion, our developed system could be an appropriate substitute to the conventional DV eye preparations in the management of elevated IOP.
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Affiliation(s)
- Musaed Alkholief
- Nanobiotechnology Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohd Abul Kalam
- Nanobiotechnology Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Aliyah Almomen
- Nanobiotechnology Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.,Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdullah Alshememry
- Nanobiotechnology Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Aws Alshamsan
- Nanobiotechnology Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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Roychoudhury A, Francis KA, Patel J, Jha SK, Basu S. A decoupler-free simple paper microchip capillary electrophoresis device for simultaneous detection of dopamine, epinephrine and serotonin. RSC Adv 2020; 10:25487-25495. [PMID: 35518591 PMCID: PMC9055240 DOI: 10.1039/d0ra03526b] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/25/2020] [Indexed: 11/21/2022] Open
Abstract
This paper demonstrates a new and simplified configuration for capillary electrophoresis-amperometric detection (CE-AD) using a paper microfluidic chip incorporating inexpensive wax printing and screen printing based methods and then used for electrophoretic separation and simultaneous in-channel amperometric detection of three clinically relevant neurochemicals in a single run without using any decouplers. Detection of neurochemicals e.g., dopamine, epinephrine and serotonin is crucial for early prediction of neurological disorders including Parkinson's, Alzheimer's, dementia, as well as progressive neuro-psychiatric conditions such as depression, anxiety, as well as certain cardiovascular diseases. The plasma concentrations of such neurochemicals are as important as those present in cerebrospinal fluid (CSF) and can be useful for rapid and convenient biosensing. However, simultaneous detection of such neurochemicals in a complex mixture such as human serum requires their separation prior to detection. With the developed microchip, separation and detection of the neurochemicals were exhibited within 650 seconds without pre-treatment and the procedure was validated with spiked fetal bovine serum samples. Beside this, the developed paper microfluidic chip has potential to be integrated in point-of-care diagnosis with onsite detection ability. Moreover, the use of a straight channel capillary, a screen-printed carbon electrode without decoupler, in-channel amperometric detection and low sample volume requirements (2 μL) are shown as additional advantages. This paper demonstrates a simplified configuration for capillary electrophoresis-amperometric detection using paper microfluidic chip for separation and simultaneous detection of three clinically relevant neurochemicals without using any decouplers.![]()
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Affiliation(s)
- Appan Roychoudhury
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Department of Biomedical Engineering
| | - Kevin Antony Francis
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Department of Biomedical Engineering
| | - Jay Patel
- Department of Chemical Engineering
- Visvesvaraya National Institute of Technology
- Nagpur 440010
- India
| | - Sandeep Kumar Jha
- Centre for Biomedical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
- Department of Biomedical Engineering
| | - Suddhasatwa Basu
- Department of Chemical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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Jung-Klawitter S, Kuseyri Hübschmann O. Analysis of Catecholamines and Pterins in Inborn Errors of Monoamine Neurotransmitter Metabolism-From Past to Future. Cells 2019; 8:cells8080867. [PMID: 31405045 PMCID: PMC6721669 DOI: 10.3390/cells8080867] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/02/2019] [Accepted: 08/04/2019] [Indexed: 12/13/2022] Open
Abstract
Inborn errors of monoamine neurotransmitter biosynthesis and degradation belong to the rare inborn errors of metabolism. They are caused by monogenic variants in the genes encoding the proteins involved in (1) neurotransmitter biosynthesis (like tyrosine hydroxylase (TH) and aromatic amino acid decarboxylase (AADC)), (2) in tetrahydrobiopterin (BH4) cofactor biosynthesis (GTP cyclohydrolase 1 (GTPCH), 6-pyruvoyl-tetrahydropterin synthase (PTPS), sepiapterin reductase (SPR)) and recycling (pterin-4a-carbinolamine dehydratase (PCD), dihydropteridine reductase (DHPR)), or (3) in co-chaperones (DNAJC12). Clinically, they present early during childhood with a lack of monoamine neurotransmitters, especially dopamine and its products norepinephrine and epinephrine. Classical symptoms include autonomous dysregulations, hypotonia, movement disorders, and developmental delay. Therapy is predominantly based on supplementation of missing cofactors or neurotransmitter precursors. However, diagnosis is difficult and is predominantly based on quantitative detection of neurotransmitters, cofactors, and precursors in cerebrospinal fluid (CSF), urine, and blood. This review aims at summarizing the diverse analytical tools routinely used for diagnosis to determine quantitatively the amounts of neurotransmitters and cofactors in the different types of samples used to identify patients suffering from these rare diseases.
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Affiliation(s)
- Sabine Jung-Klawitter
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
| | - Oya Kuseyri Hübschmann
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany
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LC–MS/MS method for quantification of 3,4-dihydroxyphenylglycol, a norepinephrine metabolite in plasma and brain regions. Bioanalysis 2019; 11:971-986. [DOI: 10.4155/bio-2019-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: To evaluate suitability of the LC–MS/MS method to quantify 3,4-dihydroxyphenylglycol (DHPG) that is used as a biomarker for monoamine oxidase (MAO) inhibition. Methods: DHPG was extracted using alumina basic cartridges and quantified on a triple quadrupole mass spectrometer using negative electrospray ionization, without the use of derivatization reagents. Results: Modulation of DHPG levels was observed following administration of selective and nonselective MAO inhibitors and results were in correlation with historical MAO inhibition potential of compounds. Conclusion: The proposed method is sensitive enough to measure plasma DHPG levels and DHPG can be used as a biomarker to assess MAO inhibition potential of new therapeutic agents.
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10
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Olivero-David R, Ruiz-Roso MB, Caporaso N, Perez-Olleros L, De Las Heras N, Lahera V, Ruiz-Roso B. In vivo bioavailability of polyphenols from grape by-product extracts, and effect on lipemia of normocholesterolemic Wistar rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:5581-5590. [PMID: 29687897 DOI: 10.1002/jsfa.9100] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 03/19/2018] [Accepted: 04/19/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The direct use of phenolic extracts from grape by-products can be useful when formulating functional food to improve consumer health. The use of phenolic extracts instead of pure polyphenols as an ingredient is relevant in this context. The present study investigated the bioavailability and absorption of polyphenols from grape by-product extracts and their health effect on cholesterolemia, by adding the extract (GE) to Wistar rats diet (50 g kg-1 ) in vivo. RESULTS GE caused the appearance of (+)-catechin, myricetin and quercetic acid in plasma and liver. (+)-Catechin was the most abundant compound (6 μg mL-1 in plasma and 0.7 μg mg-1 protein in liver), whereas no phenolic compounds were detected in plasma or liver in the control group. Similarly, 3,4-hydroxyphenylacetic, a major product of polyphenol digestion, was detected in the plasma, liver and urine of the GE-group only. GE-group had significantly lower cholesterol level and lower total cholesterol/high-density lipoprotein ratio in plasma. Total bile acid content significantly increased in fecal matter after 24 h administration of the GE-enriched diet. CONCLUSION Grape extract polyphenols are partially bioavailable and showed improvement in lipid metabolism. Thus, the results suggest that GE is promising as a functional ingredient in the prevention of hypercholesterolemia. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Raul Olivero-David
- Department of Nutrition and Bromatology I (Nutrition), Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - María B Ruiz-Roso
- Department of Physiology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Nicola Caporaso
- Division of Food Sciences, School of Biosciences, University of Nottingham, Leicestershire, UK
| | - Lourdes Perez-Olleros
- Department of Nutrition and Bromatology I (Nutrition), Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - Natalia De Las Heras
- Department of Physiology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Vicente Lahera
- Department of Physiology, Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Baltasar Ruiz-Roso
- Department of Nutrition and Bromatology I (Nutrition), Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
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Chakera AJ, Hurst PS, Spyer G, Ogunnowo-Bada EO, Marsh WJ, Riches CH, Yueh CY, Markkula SP, Dalley JW, Cox RD, Macdonald IA, Amiel SA, MacLeod KM, Heisler LK, Hattersley AT, Evans ML. Molecular reductions in glucokinase activity increase counter-regulatory responses to hypoglycemia in mice and humans with diabetes. Mol Metab 2018; 17:17-27. [PMID: 30146176 PMCID: PMC6197723 DOI: 10.1016/j.molmet.2018.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 08/02/2018] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE Appropriate glucose levels are essential for survival; thus, the detection and correction of low blood glucose is of paramount importance. Hypoglycemia prompts an integrated response involving reduction in insulin release and secretion of key counter-regulatory hormones glucagon and epinephrine that together promote endogenous glucose production to restore normoglycemia. However, specifically how this response is orchestrated remains to be fully clarified. The low affinity hexokinase glucokinase is found in glucose-sensing cells involved in glucose homeostasis including pancreatic β-cells and in certain brain areas. Here, we aimed to examine the role of glucokinase in triggering counter-regulatory hormonal responses to hypoglycemia, hypothesizing that reduced glucokinase activity would lead to increased and/or earlier triggering of responses. METHODS Hyperinsulinemic glucose clamps were performed to examine counter-regulatory responses to controlled hypoglycemic challenges created in humans with monogenic diabetes resulting from heterozygous glucokinase mutations (GCK-MODY). To examine the relative importance of glucokinase in different sensing areas, we then examined responses to clamped hypoglycemia in mice with molecularly defined disruption of whole body and/or brain glucokinase. RESULTS GCK-MODY patients displayed increased and earlier glucagon responses during hypoglycemia compared with a group of glycemia-matched patients with type 2 diabetes. Consistent with this, glucagon responses to hypoglycemia were also increased in I366F mice with mutated glucokinase and in streptozotocin-treated β-cell ablated diabetic I366F mice. Glucagon responses were normal in conditional brain glucokinase-knockout mice, suggesting that glucagon release during hypoglycemia is controlled by glucokinase-mediated glucose sensing outside the brain but not in β-cells. For epinephrine, we found increased responses in GCK-MODY patients, in β-cell ablated diabetic I366F mice and in conditional (nestin lineage) brain glucokinase-knockout mice, supporting a role for brain glucokinase in triggering epinephrine release. CONCLUSIONS Our data suggest that glucokinase in brain and other non β-cell peripheral hypoglycemia sensors is important in glucose homeostasis, allowing the body to detect and respond to a falling blood glucose.
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Affiliation(s)
- Ali J Chakera
- Institute of Clinical and Biomedical Sciences, University of Exeter, United Kingdom
| | - Paul S Hurst
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - Gill Spyer
- Institute of Clinical and Biomedical Sciences, University of Exeter, United Kingdom
| | - Emmanuel O Ogunnowo-Bada
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - William J Marsh
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - Christine H Riches
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - Chen-Yu Yueh
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - S Pauliina Markkula
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom
| | - Jeffrey W Dalley
- Behavioural and Clinical Neuroscience Institute and Departments of Psychology and Psychiatry, University of Cambridge, United Kingdom
| | - Roger D Cox
- MRC Harwell Institute, Mammalian Genetics Unit, Harwell Oxford, United Kingdom
| | - Ian A Macdonald
- MRC-ARUK Centre for Musculoskeletal Ageing and NIHR Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust/ University of Nottingham, Nottingham, United Kingdom
| | - Stephanie A Amiel
- Division of Diabetes and Nutritional Sciences, King's College London, United Kingdom
| | - Kenneth M MacLeod
- Institute of Clinical and Biomedical Sciences, University of Exeter, United Kingdom
| | - Lora K Heisler
- Rowett Institute, University of Aberdeen, United Kingdom
| | - Andrew T Hattersley
- Institute of Clinical and Biomedical Sciences, University of Exeter, United Kingdom.
| | - Mark L Evans
- Wellcome Trust/ MRC Institute of Metabolic Science and Department of Medicine, University of Cambridge, United Kingdom.
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12
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Evaluation of antiparkinson activity of PTUPB by measuring dopamine and its metabolites in Drosophila melanogaster: LC-MS/MS method development. J Pharm Biomed Anal 2017; 149:457-464. [PMID: 29169114 DOI: 10.1016/j.jpba.2017.11.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/14/2017] [Accepted: 11/15/2017] [Indexed: 12/23/2022]
Abstract
Soluble epoxide hydrolase (sEH) inhibition is reported to elevate endogenous epoxyeicosatrienoic acids (EET's), which are known to play an important role in neuroprotection by inhibiting oxidative stress and neuroinflammation. In the present study, PTUPB, a dual inhibitor of sEH and COX-2, has been tested for its antiparkinson activity against rotenone (ROT) induced neurodegeneration in Drosophila model of Parkinson's disease (PD). To determine the efficacy and brain bioavailability of PTUPB a simple, rapid and sensitive LC-MS/MS method was developed and validated for the estimation of PTUPB (Method-I), dopamine (DA) and its metabolites (Method-II) in fly head. Mass spectrometric acquisitions of analytes signals were performed in positive and negative electron spray ionization MRM mode by monitoring the daughter ions. The isocratic elution using formic acid (0.1% v/v) and acetonitrile (20:80v/v) (for method I), and acetic acid (0.1% v/v) and methanol (for method II) on Jones C18 was carried out to achieve the separation. The results of brain PTUPB, DA and its metabolites estimation shows a dose dependent increase in PTUPB concentration and a dose dependent prevention of ROT induced changes in DA and its metabolites levels (p<0.05), indicating a significant neuroprotection activity of PTUPB. In the present study, we have successfully developed and validated LC-MS/MS methods to identify and quantify PTUPB, DA and its metabolites using a UFLC-ESI-QqQ mass spectrometer for the screening of neuroprotective agents in Drosophila Melanogaster.
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Akyilmaz E, Canbay E, Dinçkaya E, Güvenç C, Yaşa İ, Bayram E. Simultaneous Determination of Epinephrine and Dopamine by Using Candida tropicalis
Yeast Cells Immobilized in a Carbon Paste Electrode Modified with Single Wall Carbon Nanotube. ELECTROANAL 2017. [DOI: 10.1002/elan.201700125] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Erol Akyilmaz
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
| | - Erhan Canbay
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
- Department of Medicinal Biochemistry; Faculty of Medicine; Ege University; 35100 Bornova-Izmir/ Turkey
| | - Erhan Dinçkaya
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
| | - Cansu Güvenç
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
| | - İhsan Yaşa
- Department of Microbiology; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
| | - Ezgi Bayram
- Department of Biochemistry; Faculty of Science; Ege University; 35100 Bornova-Izmir/ Turkey
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Wang Y, Dinh TN, Nield A, Krishna SM, Denton K, Golledge J. Renal Denervation Promotes Atherosclerosis in Hypertensive Apolipoprotein E-Deficient Mice Infused with Angiotensin II. Front Physiol 2017; 8:215. [PMID: 28450836 PMCID: PMC5390019 DOI: 10.3389/fphys.2017.00215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/24/2017] [Indexed: 11/13/2022] Open
Abstract
Objective: To determine the effect of renal denervation (RDN) on the severity of atherosclerosis and aortic aneurysm in hypertensive mice. Methods: Hypertension, atherosclerosis and aortic aneurysm were induced by subcutaneous infusion of angiotensin II (1 μg/kg/min) for 28 days in apolipoprotein E-deficient mice. RDN was conducted using combined surgical and local chemical denervation. The norepinephrine concentration in the kidney was measured by high-performance liquid chromatography. Blood pressure was measured by the tail-cuff method. Atherosclerosis was assessed by Sudan IV staining of the aortic arch. The aortic diameter was measured by the morphometric method. The mRNA expression of genes associated with atherosclerosis and aortic aneurysm were analyzed by quantitative PCR. Results: RDN decreased the median norepinephrine content in the kidney by 93.4% (n = 5-7, P = 0.003) 5 days after the procedure, indicating that the RDN procedure was successful. RDN decreased systolic blood pressure in apolipoprotein E-deficient mice. Mice that had RDN had more severe aortic arch atherosclerosis (median percentage of Sudan IV positive area: 13.2% in control mice, n = 12, and 25.4% in mice having RDN, n = 12, P = 0.028). The severity of the atherosclerosis was negatively correlated with the renal norepinephrine content (spearman r = -0.6557, P = 0.005). RDN did not affect the size of aortic aneurysms formed or the incidence of aortic rupture in mice receiving angiotensin II. RDN significantly increased the aortic mRNA expression of matrix metalloproteinase-2 (MMP-2). Conclusion: RDN promoted atherosclerosis in apolipoprotein E-deficient mice infused with angiotensin II associated with upregulation of MMP-2. The higher MMP-2 expression could be the results of the greater amount of atheroma in the RDN mice. The findings suggest further research is needed to assess potentially deleterious effects of RDN in patients.
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Affiliation(s)
- Yutang Wang
- School of Applied and Biomedical Science, Federation University AustraliaBallarat, VIC, Australia.,The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook UniversityTownsville, QLD, Australia
| | - Tam N Dinh
- School of Applied and Biomedical Science, Federation University AustraliaBallarat, VIC, Australia.,The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook UniversityTownsville, QLD, Australia
| | - Alexander Nield
- School of Applied and Biomedical Science, Federation University AustraliaBallarat, VIC, Australia
| | - Smriti M Krishna
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook UniversityTownsville, QLD, Australia
| | - Kate Denton
- Cardiovascular and Renal Physiology, Department of Physiology, Monash UniversityClayton, VIC, Australia
| | - Jonathan Golledge
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook UniversityTownsville, QLD, Australia.,Department of Vascular and Endovascular Surgery, The Townsville HospitalTownsville, QLD, Australia
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Pung T, Klein B, Blodgett D, Jortner B, Ehrich M. Examination of Concurrent Exposure to Repeated Stress and Chlorpyrifos on Cholinergic, Glutamatergic, and Monoamine Neurotransmitter Systems in Rat Forebrain Regions. Int J Toxicol 2016; 25:65-80. [PMID: 16510359 DOI: 10.1080/10915810500527119] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Repeated stress has been reported to cause reversible impairment in the central nervous system (CNS). It was proposed that alterations in glutamatergic, cholinergic, and monoamine neurotransmitter systems after exposure to stress are initial CNS events contributing to this impairment and that exacerbation could occur with concurrent exposure to cholinesterase inhibitors. Effects of concurrent exposure to repeated stress and chlorpyrifos on activities of acetylcholinesterase (AChE), carboxylesterase, and choline acetyltransferase (ChAT); concentrations of excitatory amino acids, monoamines, and their metabolites; and maximum binding densities ( Bmax) and equilibrium dissociation rate constants ( Kd) of glutamatergic N-methyl-d-aspartate (NMDA) and total muscarinic cholinergic receptors were studied in the blood, hippocampus, cerebral cortex, or hypothalamus of adult Long-Evans rats. Stress treatments extended over 28 days included (1) control rats handled 5 days/week; (2) rats restrained 1 h/day for 5 days/week; (3) rats swum 30 min for 1 day/week; or (4) rats restrained 4 days/week and swum for 1 day/week. On day 24, each stress treatment group was randomly divided and injected either with corn oil or chlorpyrifos, 160 mg/kg subcutaneously (sc) (60% of the maximum tolerated dose), 4 h after restraint. Blood and brain tisssues were collected on day 28. Rats restrained and swum had a statistical trend toward increasing concentrations of glutamate in the hippocampus when compared to rats only swum ( p = .064). Chlorpyrifos administration decreased restraint-induced elevated aspartate in the hippocampus, and decreased Bmax of total muscarinic receptors in the cerebral cortex. In addition, chlorpyrifos decreased Bmax and Kd of total muscarinic receptors in the cerebral cortex of swum rats. Results demonstrated that chlorpyrifos inhibited AChE activity in blood, cerebral cortex, and hippocampus, but stress did not affect AChE activity. Carboxylesterase activity was inhibited by chlorpyrifos and by repeated restraint with swim. Swim stress decreased concentrations of norepinephrine in the hippocampus and hypothalamus, and increased concentrations of dopamine and its metabolite, DOPAC, in the hypothalamus. Both stress and chlorpyrifos altered serotonin concentrations, and the interactions of repeated stress and chlorpyrifos on serotonin approached significance in the hippocampus ( p = .06) and hypothalamus ( p = .08). Therefore, stress models were demonstrated to alter glutamatergic and monoamine responses, whereas chlorpyrifos alone had effects on cholinergic and monoamine systems in the rat CNS. However, the interactions between stress and chlorpyrifos significant at p < 0.05 were restricted to attenuation of elevated aspartate in the hippocampus of restrained with swim rats and decreased Kd of acetylcholine receptors in the cerebral cortex of swum rats and restrained rats.
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Affiliation(s)
- Thitiya Pung
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg, Virginia 24061-0442, USA
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16
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An integrated liquid chromatography–tandem mass spectrometry approach for the ultra-sensitive determination of catecholamines in human peripheral blood mononuclear cells to assess neural-immune communication. J Chromatogr A 2016; 1449:54-61. [DOI: 10.1016/j.chroma.2016.04.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/24/2016] [Accepted: 04/14/2016] [Indexed: 01/06/2023]
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17
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He M, Wang C, Wei Y. Selective enrichment and determination of monoamine neurotransmitters by CU(II) immobilized magnetic solid phase extraction coupled with high-performance liquid chromatography-fluorescence detection. Talanta 2016; 147:437-44. [DOI: 10.1016/j.talanta.2015.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/03/2015] [Accepted: 10/06/2015] [Indexed: 01/07/2023]
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18
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Farthing C, Halquist M, Sweet DH. A Simple High-Performance Liquid Chromatographic Method for the Simultaneous Determination of Monoamine Neurotransmitters and Relative Metabolites with Application in Mouse Brain Tissue. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2014.938815] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Christine Farthing
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Matthew Halquist
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Douglas H. Sweet
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia, USA
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19
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Gao P, Ma H, Yang J, Wu D, Zhang Y, Du B, Fan D, Wei Q. Anatase TiO2 based photoelectrochemical sensor for the sensitive determination of dopamine under visible light irradiation. NEW J CHEM 2015. [DOI: 10.1039/c4nj01909a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The sensitive photoelectrochemical determination of dopamine was achieved using an indium tin oxide electrode modified with TiO2 nanoparticles.
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Affiliation(s)
- Picheng Gao
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Hongmin Ma
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Jiaojiao Yang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Dan Wu
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Yong Zhang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Bin Du
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Dawei Fan
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Qin Wei
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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20
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LI H, WANG X. Simultaneous Determination of Epinephrine and Uric Acid at Poly (Guanine) Modified Glassy Carbon Electrode. ELECTROCHEMISTRY 2015. [DOI: 10.5796/electrochemistry.83.434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Hongying LI
- Department of Chemistry and Chemical Engineering, Heze University
| | - Xueliang WANG
- Department of Chemistry and Chemical Engineering, Heze University
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21
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Płonka J. Methods of biological fluids sample preparation - biogenic amines, methylxanthines, water-soluble vitamins. Biomed Chromatogr 2014; 29:1-20. [DOI: 10.1002/bmc.3353] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/22/2014] [Accepted: 09/02/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Joanna Płonka
- Silesian University of Technology; Faculty of Chemistry, Department of Inorganic, Analytical Chemistry and Electrochemistry; Strzody 7 Str. 44-100 Gliwice Poland
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22
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Khoobi A, Ghoreishi SM, Behpour M, Masoum S. Three-Dimensional Voltammetry: A Chemometrical Analysis of Electrochemical Data for Determination of Dopamine in the Presence of Unexpected Interference by a Biosensor Based on Gold Nanoparticles. Anal Chem 2014; 86:8967-73. [DOI: 10.1021/ac501238a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Asma Khoobi
- Department of Analytical
Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O.
Box 87317-51167, I.R. Iran
| | - Sayed Mehdi Ghoreishi
- Department of Analytical
Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O.
Box 87317-51167, I.R. Iran
| | - Mohsen Behpour
- Department of Analytical
Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O.
Box 87317-51167, I.R. Iran
| | - Saeed Masoum
- Department of Analytical
Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O.
Box 87317-51167, I.R. Iran
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23
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A rapid and simple method for the determination of 3,4-dihydroxyphenylacetic acid, norepinephrine, dopamine, and serotonin in mouse brain homogenate by HPLC with fluorimetric detection. J Pharm Biomed Anal 2014; 98:266-70. [DOI: 10.1016/j.jpba.2014.05.039] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 05/29/2014] [Indexed: 11/19/2022]
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24
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Demchenko IT, Gasier HG, Zhilyaev SY, Moskvin AN, Krivchenko AI, Piantadosi CA, Allen BW. Baroreceptor afferents modulate brain excitation and influence susceptibility to toxic effects of hyperbaric oxygen. J Appl Physiol (1985) 2014; 117:525-34. [PMID: 24994889 DOI: 10.1152/japplphysiol.00435.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Unexplained adjustments in baroreflex sensitivity occur in conjunction with exposures to potentially toxic levels of hyperbaric oxygen. To investigate this, we monitored central nervous system, autonomic and cardiovascular responses in conscious and anesthetized rats exposed to hyperbaric oxygen at 5 and 6 atmospheres absolute, respectively. We observed two contrasting phases associated with time-dependent alterations in the functional state of the arterial baroreflex. The first phase, which conferred protection against potentially neurotoxic doses of oxygen, was concurrent with an increase in baroreflex sensitivity and included decreases in cerebral blood flow, heart rate, cardiac output, and sympathetic drive. The second phase was characterized by baroreflex impairment, cerebral hyperemia, spiking on the electroencephalogram, increased sympathetic drive, parasympatholysis, and pulmonary injury. Complete arterial baroreceptor deafferentation abolished the initial protective response, whereas electrical stimulation of intact arterial baroreceptor afferents prolonged it. We concluded that increased afferent traffic attributable to arterial baroreflex activation delays the development of excessive central excitation and seizures. Baroreflex inactivation or impairment removes this protection, and seizures may follow. Finally, electrical stimulation of intact baroreceptor afferents extends the normal delay in seizure development. These findings reveal that the autonomic nervous system is a powerful determinant of susceptibility to sympathetic hyperactivation and seizures in hyperbaric oxygen and the ensuing neurogenic pulmonary injury.
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Affiliation(s)
- Ivan T Demchenko
- Center for Hyperbaric Medicine and Environmental Physiology, and Departments of Anesthesiology and Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - Heath G Gasier
- Center for Hyperbaric Medicine and Environmental Physiology, and Departments of Anesthesiology and
| | - Sergei Yu Zhilyaev
- Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - Alexander N Moskvin
- Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - Alexander I Krivchenko
- Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - Claude A Piantadosi
- Center for Hyperbaric Medicine and Environmental Physiology, and Departments of Anesthesiology and Medicine, Duke University Medical Center, Durham, North Carolina
| | - Barry W Allen
- Center for Hyperbaric Medicine and Environmental Physiology, and Departments of Anesthesiology and
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Voltammetric behavior of dopamine at a glassy carbon electrode modified with NiFe2O4 magnetic nanoparticles decorated with multiwall carbon nanotubes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 39:78-85. [DOI: 10.1016/j.msec.2014.02.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 02/08/2014] [Accepted: 02/17/2014] [Indexed: 11/23/2022]
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Stefan-van Staden RI, Moldoveanu I, van Staden JF. Pattern recognition of neurotransmitters using multimode sensing. J Neurosci Methods 2014; 229:1-7. [PMID: 24680958 DOI: 10.1016/j.jneumeth.2014.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 02/25/2014] [Accepted: 03/17/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Pattern recognition is essential in chemical analysis of biological fluids. Reliable and sensitive methods for neurotransmitters analysis are needed. NEW METHOD Therefore, we developed for pattern recognition of neurotransmitters: dopamine, epinephrine, norepinephrine a method based on multimode sensing. Multimode sensing was performed using microsensors based on diamond paste modified with 5,10,15,20-tetraphenyl-21H,23H-porphyrine, hemin and protoporphyrin IX in stochastic and differential pulse voltammetry modes. RESULTS Optimized working conditions: phosphate buffer solution of pH 3.01 and KCl 0.1mol/L (as electrolyte support), were determined using cyclic voltammetry and used in all measurements. The lowest limits of quantification were: 10(-10)mol/L for dopamine and epinephrine, and 10(-11)mol/L for norepinephrine. The multimode microsensors were selective over ascorbic and uric acids and the method facilitated reliable assay of neurotransmitters in urine samples, and therefore, the pattern recognition showed high reliability (RSD<1% for more than 6 months) for the simultaneous determination of dopamine, epinephrine and norepinephrine from urine and whole blood samples. COMPARISON WITH EXISTING METHOD(S) The proposed method can perform pattern recognition of the three neurotransmitters on biological fluids at a lower determination level than chromatographic methods. The sampling of the biological fluids referees only to the buffering (1:1, v/v) with a phosphate buffer pH 3.01, while for chromatographic methods the sampling is laborious. CONCLUSIONS Accordingly with the statistic evaluation of the results at 99.00% confidence level, both modes can be used for pattern recognition and quantification of neurotransmitters with high reliability. The best multimode microsensor was the one based on diamond paste modified with protoporphyrin IX.
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Affiliation(s)
- Raluca-Ioana Stefan-van Staden
- Laboratory of Electrochemistry and PATLAB Bucharest, National Institute of Research for Electrochemistry and Condensed Matter, Splaiul Independentei No. 202, Bucharest, Romania; Faculty of Applied Chemistry and Material Science, Politehnica University of Bucharest, Bucharest, Romania.
| | - Iuliana Moldoveanu
- Laboratory of Electrochemistry and PATLAB Bucharest, National Institute of Research for Electrochemistry and Condensed Matter, Splaiul Independentei No. 202, Bucharest, Romania; Faculty of Applied Chemistry and Material Science, Politehnica University of Bucharest, Bucharest, Romania
| | - Jacobus Frederick van Staden
- Laboratory of Electrochemistry and PATLAB Bucharest, National Institute of Research for Electrochemistry and Condensed Matter, Splaiul Independentei No. 202, Bucharest, Romania
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Liquid chromatographic methods for the quantification of catecholamines and their metabolites in several biological samples—A review. Anal Chim Acta 2013; 768:12-34. [DOI: 10.1016/j.aca.2012.12.030] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 12/16/2012] [Accepted: 12/19/2012] [Indexed: 11/18/2022]
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Oppolzer D, Moreno I, da Fonseca B, Passarinha L, Barroso M, Costa S, Queiroz JA, Gallardo E. Analytical approach to determine biogenic amines in urine using microextraction in packed syringe and liquid chromatography coupled to electrochemical detection. Biomed Chromatogr 2012; 27:608-14. [PMID: 23124688 DOI: 10.1002/bmc.2835] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 09/24/2012] [Indexed: 11/12/2022]
Abstract
The goal of this work was to develop and validate an analytical method for the detection and quantification of the biogenic amines serotonin (5-HT), dopamine (DA) and norepinephrine (NE), using microextraction in packed syringe (MEPS) and liquid chromatography coupled to electrochemical detection (HPLC-ED) in urine. The method was validated according to internationally accepted guidelines from the Food and Drug Administration. Linearity was established between 50 and 1000 ng/mL for 5-HT and between 5 and 1000 ng/mL for DA and NE, with determination coefficients (R(2)) >0.99 for all compounds. The limits of quantification and detection were respectively 50 and 20 ng/mL for 5-HT, and 5 and 2 ng/mL for DA and NE. Within- and between-run precision ranged from 0.84 to 9.41%, while accuracy ranged from 0.79 to 12.76% for all compounds. The intermediate precision and accuracy were 1.50-8.36 and 0.54-13.51%, respectively. The method was found suitable for clinical routine analysis of the studied compounds, using a sample volume of 0.5 mL. This is the first study employing a commercially available MEPS column for the simultaneous detection and quantification of 5-HT, DA and NE in urine by coulometric detection.
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Affiliation(s)
- David Oppolzer
- CICS-UBI, Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6201-556 Covilhã, Portugal
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Li T, Wang Z, Xie H, Fu Z. Highly sensitive trivalent copper chelate-luminol chemiluminescence system for capillary electrophoresis detection of epinephrine in the urine of smoker. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 911:1-5. [PMID: 23217298 DOI: 10.1016/j.jchromb.2012.10.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 09/11/2012] [Accepted: 10/15/2012] [Indexed: 11/19/2022]
Abstract
Epinephrine (EP) is one of the most important neurotransmitters and hormones. Some previous literatures show that there is a close relation between its release and smoking. To compare the levels of EP in urines of smokers and nonsmokers, a sensitive chemiluminescence (CL) system, luminol-diperiodatocuprate (III) (K(5)[Cu(HIO(6))(2)], DPC), has been developed and validated for the determination of EP after CE separation. The DPC-luminol-EP CL reaction showed very intensive emission and fast kinetic characteristics, thus led to a high sensitivity in the flow-through detection mode for capillary electrophoresis. With the peak height as a quantitative parameter, the relative CL intensity was linear with the EP concentration in the range of 2.0-400ng/mL, with a limit of detection of 0.82ng/mL (S/N=3). The reproducibility was assessed by intra- and inter-day relative standard deviations (RSDs) for 11 replicate determinations of EP standard samples at low, medium and high concentrations. The intra- and inter-day RSDs for CL signals were 5.5%-6.6% and 6.1%-7.5%, respectively, and those for migration times were 3.4%-5.8% and 4.3%-6.3%, respectively. The presented method was successfully applied to the determination of EP in EP injection and urine samples of smokers and nonsmokers. The recovery test results for urine samples ranged from 86.5 to 112.0%, which demonstrated the reliability of this method. The results for urine sample detection indicate that the average level of EP in the urines of the smoker group is obviously higher than that in the urines of the nonsmoker group, which may demonstrate that smoking can stimulate the release of EP in human body.
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Affiliation(s)
- Tao Li
- Key Laboratory of Luminescence and Real-Time Analysis (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
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30
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Goyal RN, Agrawal B. Ag ion irradiated based sensor for the electrochemical determination of epinephrine and 5-hydroxytryptamine in human biological fluids. Anal Chim Acta 2012; 743:33-40. [PMID: 22882821 DOI: 10.1016/j.aca.2012.06.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 06/25/2012] [Accepted: 06/29/2012] [Indexed: 12/01/2022]
Abstract
A promising and highly sensitive voltammetric method has been developed for the first time for the determination of epinephrine (EP) and 5-hydroxytryptamine (5-HT) using 120 MeV Ag ion irradiated multi-walled carbon nano tube (MWCNT) based sensor. The MWCNT were irradiated at various fluences of 1e12, 3e12 and 1e13 ions cm(-2) using palletron accelerator. The simultaneous determination of EP and 5-HT has been carried out in phosphate buffer solution of pH 7.20 using square wave voltammetry and cyclic voltammetry. Experimental results suggested that irradiation of MWCNT by Ag ions enhanced the electrocatalytic activity due to increase in effective surface area and insertion of Ag ions, leading to a remarkable enhancement in peak currents and shift of peak potentials to less positive values as compared to the unirradiated MWCNT (pristine). The developed sensor exhibited a linear relationship between peak current and concentration of EP and 5-HT in the range 0.1-105 μM with detection limit (3σ/b) of 2 nM and 0.75 nM, respectively. The practical utility of irradiation based MWCNT sensor has been demonstrated for the determination of EP and 5-HT in human urine and blood samples.
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Affiliation(s)
- Rajendra N Goyal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, India.
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Demchenko IT, Moskvin AN, Krivchenko AI, Piantadosi CA, Allen BW. Nitric oxide-mediated central sympathetic excitation promotes CNS and pulmonary O₂ toxicity. J Appl Physiol (1985) 2012; 112:1814-23. [PMID: 22442027 PMCID: PMC3379151 DOI: 10.1152/japplphysiol.00902.2011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 03/16/2012] [Indexed: 01/29/2023] Open
Abstract
In hyperbaric oxygen (HBO(2)) at or above 3 atmospheres absolute (ATA), autonomic pathways link central nervous system (CNS) oxygen toxicity to pulmonary damage, possibly through a paradoxical and poorly characterized relationship between central nitric oxide production and sympathetic outflow. To investigate this possibility, we assessed sympathetic discharges, catecholamine release, cardiopulmonary hemodynamics, and lung damage in rats exposed to oxygen at 5 or 6 ATA. Before HBO(2) exposure, either a selective inhibitor of neuronal nitric oxide synthase (NOS) or a nonselective NOS inhibitor was injected directly into the cerebral ventricles to minimize effects on the lung, heart, and peripheral circulation. Experiments were performed on both anesthetized and conscious rats to differentiate responses to HBO(2) from the effects of anesthesia. EEG spikes, markers of CNS toxicity in anesthetized animals, were approximately four times as likely to develop in control rats than in animals with central NOS inhibition. In inhibitor-treated animals, autonomic discharges, cardiovascular pressures, catecholamine release, and cerebral blood flow all remained below baseline throughout exposure to HBO(2). In control animals, however, initial declines in these parameters were followed by significant increases above their baselines. In awake animals, central NOS inhibition significantly decreased the incidence of clonic-tonic convulsions or delayed their onset, compared with controls. The novel findings of this study are that NO produced by nNOS in the periventricular regions of the brain plays a critical role in the events leading to both CNS toxicity in HBO(2) and to the associated sympathetic hyperactivation involved in pulmonary injury.
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Affiliation(s)
- Ivan T Demchenko
- Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center, Durham, NC 27710, USA
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Suzuki M, Nozawa A, Ueda K, Bungo T, Terao H, Asahina K. Secretory patterns of catecholamines in Indo-Pacific bottlenose dolphins. Gen Comp Endocrinol 2012; 177:76-81. [PMID: 22405705 DOI: 10.1016/j.ygcen.2012.02.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 01/20/2012] [Accepted: 02/14/2012] [Indexed: 10/28/2022]
Abstract
Catecholamines (CAs), namely adrenaline (A), noradrenaline (NA), and dopamine (DA), are secreted by the sympathoadrenal system and participate in a diverse array of functions, e.g., heat production, cardiovascular regulation, stress response and so on. However, little is known regarding peripheral CA fluctuations in cetaceans; nevertheless aquatic animals like them have needed to modify their physiological response especially for thermoregulation in water and oxygen economy during diving. To understand CA dynamism in cetaceans, diurnal changes in serum A, NA, and DA concentrations were measured during the winter and summer solstices in four Indo-Pacific bottlenose dolphins (Tursiops aduncus). The average serum NA concentration was much higher than the average A and DA concentrations, and all concentrations were higher than those reported in other cetacean species. No distinct diurnal fluctuations were observed in CA concentrations in either solstice, suggesting inhibition of the decrease in CA concentrations during nocturnal periods by the unique sleep pattern of dolphins. All the serum CA concentrations were negatively correlated with water temperature as body temperatures were, indicating that the sympathoadrenal system might be more active during winter than in summer season, suggesting a role of CA in thermoregulation.
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Affiliation(s)
- Miwa Suzuki
- Department of Marine Science and Resources, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan.
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Colleran JJ, Breslin CB. Simultaneous electrochemical detection of the catecholamines and ascorbic acid at PEDOT/S-β-CD modified gold electrodes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2011.12.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Raj MA, Revin SB, John SA. Selective determination of 3,4-dihydroxyphenylacetic acid in the presence of ascorbic acid using 4-(dimethylamino)pyridine capped gold nanoparticles immobilized on gold electrode. Colloids Surf B Biointerfaces 2011; 87:353-60. [DOI: 10.1016/j.colsurfb.2011.05.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 04/14/2011] [Accepted: 05/22/2011] [Indexed: 10/18/2022]
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Thackeray JT, Radziuk J, Harper ME, Suuronen EJ, Ascah KJ, Beanlands RS, Dasilva JN. Sympathetic nervous dysregulation in the absence of systolic left ventricular dysfunction in a rat model of insulin resistance with hyperglycemia. Cardiovasc Diabetol 2011; 10:75. [PMID: 21831292 PMCID: PMC3170183 DOI: 10.1186/1475-2840-10-75] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 08/10/2011] [Indexed: 12/19/2022] Open
Abstract
Background Diabetes mellitus is strongly associated with cardiovascular dysfunction, derived in part from impairment of sympathetic nervous system signaling. Glucose, insulin, and non-esterified fatty acids are potent stimulants of sympathetic activity and norepinephrine (NE) release. We hypothesized that sustained hyperglycemia in the high fat diet-fed streptozotocin (STZ) rat model of sustained hyperglycemia with insulin resistance would exhibit progressive sympathetic nervous dysfunction in parallel with deteriorating myocardial systolic and/or diastolic function. Methods Cardiac sympathetic nervous integrity was investigated in vivo via biodistribution of the positron emission tomography radiotracer and NE analogue [11C]meta-hydroxyephedrine ([11C]HED). Cardiac systolic and diastolic function was evaluated by echocardiography. Plasma and cardiac NE levels and NE reuptake transporter (NET) expression were evaluated as correlative measurements. Results The animal model displays insulin resistance, sustained hyperglycemia, and progressive hypoinsulinemia. After 8 weeks of persistent hyperglycemia, there was a significant 13-25% reduction in [11C]HED retention in myocardium of STZ-treated hyperglycemic but not euglycemic rats as compared to controls. There was a parallel 17% reduction in immunoblot density for NE reuptake transporter, a 1.2 fold and 2.5 fold elevation of cardiac and plasma NE respectively, and no change in sympathetic nerve density. No change in ejection fraction or fractional area change was detected by echocardiography. Reduced heart rate, prolonged mitral valve deceleration time, and elevated transmitral early to atrial flow velocity ratio measured by pulse-wave Doppler in hyperglycemic rats suggest diastolic impairment of the left ventricle. Conclusions Taken together, these data suggest that sustained hyperglycemia is associated with elevated myocardial NE content and dysregulation of sympathetic nervous system signaling in the absence of systolic impairment.
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Affiliation(s)
- James T Thackeray
- Molecular Function & Imaging Program, National Cardiac PET Centre, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, K1Y 4W7, Canada
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Akyilmaz E, Turemis M, Yasa İ. Voltammetric determination of epinephrine by White rot fungi (Phanerochaete chrysosporium ME446) cells based microbial biosensor. Biosens Bioelectron 2011; 26:2590-4. [DOI: 10.1016/j.bios.2010.11.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 11/03/2010] [Accepted: 11/09/2010] [Indexed: 11/15/2022]
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Demchenko IT, Zhilyaev SY, Moskvin AN, Piantadosi CA, Allen BW. Autonomic activation links CNS oxygen toxicity to acute cardiogenic pulmonary injury. Am J Physiol Lung Cell Mol Physiol 2010; 300:L102-11. [PMID: 20971806 DOI: 10.1152/ajplung.00178.2010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Breathing hyperbaric oxygen (HBO₂), particularly at pressures above 3 atmospheres absolute, can cause acute pulmonary injury that is more severe if signs of central nervous system toxicity occur. This is consistent with the activation of an autonomic link between the brain and the lung, leading to acute pulmonary oxygen toxicity. This pulmonary damage is characterized by leakage of fluid, protein, and red blood cells into the alveoli, compatible with hydrostatic injury due to pulmonary hypertension, left atrial hypertension, or both. Until now, however, central hemodynamic parameters and autonomic activity have not been studied concurrently in HBO₂, so any hypothetical connections between the two have remained untested. Therefore, we performed experiments using rats in which cerebral blood flow, electroencephalographic activity, cardiopulmonary hemodynamics, and autonomic traffic were measured in HBO₂ at 5 and 6 atmospheres absolute. In some animals, autonomic pathways were disrupted pharmacologically or surgically. Our findings indicate that pulmonary damage in HBO₂ is caused by an abrupt and significant increase in pulmonary vascular pressure, sufficient to produce barotrauma in capillaries. Specifically, extreme HBO₂ exposures produce massive sympathetic outflow from the central nervous system that depresses left ventricular function, resulting in acute left atrial and pulmonary hypertension. We attribute these effects on the heart and on the pulmonary vasculature to HBO₂-mediated central sympathetic excitation and catecholamine release that disturbs the normal equilibrium between excitatory and inhibitory activity in the autonomic nervous system.
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Affiliation(s)
- Ivan T Demchenko
- Center for Hyperbaric Medicine and Environmental Physiology, Duke Univ. Medical Center, Durham, NC 27710, USA
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Wang Y, Chen ZZ. A novel poly(taurine) modified glassy carbon electrode for the simultaneous determination of epinephrine and dopamine. Colloids Surf B Biointerfaces 2009; 74:322-7. [DOI: 10.1016/j.colsurfb.2009.07.046] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 06/30/2009] [Accepted: 07/31/2009] [Indexed: 10/20/2022]
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Determination of dansylated monoamine and amino acid neurotransmitters and their metabolites in human plasma by liquid chromatography-electrospray ionization tandem mass spectrometry. Anal Biochem 2009; 396:103-11. [PMID: 19751698 DOI: 10.1016/j.ab.2009.09.015] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Revised: 09/05/2009] [Accepted: 09/09/2009] [Indexed: 11/23/2022]
Abstract
The determination of neurotransmitters (NTs) and their metabolites facilitates better understanding of complex neurobiology in the central nervous system disorders and has expanding uses in many other fields. We present a liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI/MS/MS) method for the quantification of dopamine (DA), 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA), norepinephrine (NE), vanillymandelic acid (VMA), 3-methoxy-4-hydroxy phenylglycol (MHPG), 5-hydroxytryptamine (5-HT), 5-hydroxyindole-3-acetic acid (5-HIAA), glutamate (Glu), and gamma-aminobutyric acid (GABA). The NTs and their metabolites were dansylated and analyzed by an LC gradient on a C18 column on-line with a tandem mass spectrometer. This method exhibited excellent linearity for all of the analytes with regression coefficients higher than 0.99. The lower limit of quantification (LLOQ) values for DA, DOPAC, HVA, NE, VMA, MHPG, 5-HT, 5-HIAA, Glu, and GABA were 0.57, 0.37, 0.35, 0.40, 0.35, 0.91, 0.27, 0.43, 0.65, and 1.62 pmol/ml, respectively. The precision results were expressed as coefficients of variation (CVs), ranging from 1.5% to 13.6% for intraassay and from 2.9% to 13.7% for the interassay. This novel LC-ESI/MS/MS approach is precise, highly sensitive, specific, and sufficiently simple. It can provide an alternative method for the quantification of the NTs and their metabolites in human plasma.
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Abboud I, Lerolle N, Urien S, Tadié JM, Leviel F, Fagon JY, Faisy C. Pharmacokinetics of epinephrine in patients with septic shock: modelization and interaction with endogenous neurohormonal status. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2009; 13:R120. [PMID: 19622169 PMCID: PMC2750169 DOI: 10.1186/cc7972] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 06/26/2009] [Accepted: 07/21/2009] [Indexed: 11/28/2022]
Abstract
Introduction In septic patients, an unpredictable response to epinephrine may be due to pharmacodynamic factors or to non-linear pharmacokinetics. The purpose of this study was to investigate the pharmacokinetics of epinephrine and its determinants in patients with septic shock. Methods Thirty-eight consecutive adult patients with septic shock were prospectively recruited immediately before epinephrine infusion. A baseline blood sample (C0) was taken to assess endogenous epinephrine, norepinephrine, renin, aldosterone, and plasma cortisol levels before epinephrine infusion. At a fixed cumulative epinephrine dose adjusted to body weight and under steady-state infusion, a second blood sample (C1) was taken to assess epinephrine and norepinephrine concentrations. Data were analyzed using the nonlinear mixed effect modeling software program NONMEM. Results Plasma epinephrine concentrations ranged from 4.4 to 540 nmol/L at steady-state infusion (range 0.1 to 7 mg/hr; 0.026 to 1.67 μg/kg/min). A one-compartment model adequately described the data. Only body weight (BW) and New Simplified Acute Physiologic Score (SAPSII) at intensive care unit admission significantly influenced epinephrine clearance: CL (L/hr) = 127 × (BW/70)0.60 × (SAPS II/50)-0.67. The corresponding half-life was 3.5 minutes. Endogenous norepinephrine plasma concentration significantly decreased during epinephrine infusion (median (range) 8.8 (1 – 56.7) at C0 vs. 4.5 (0.3 – 38.9) nmol/L at C1, P < 0.001). Conclusions Epinephrine pharmacokinetics is linear in septic shock patients, without any saturation at high doses. Basal neurohormonal status does not influence epinephrine pharmacokinetics. Exogenous epinephrine may alter the endogenous norepinephrine metabolism in septic patients.
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Affiliation(s)
- Imad Abboud
- Medical Intensive Care Unit, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Université Paris - Descartes, Paris, France.
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Attenuating effect of melatonin on pyridoxal-stimulated release of adrenomedullary catecholamines in the rat. Life Sci 2009; 84:696-704. [DOI: 10.1016/j.lfs.2009.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2008] [Revised: 01/30/2009] [Accepted: 02/11/2009] [Indexed: 11/17/2022]
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2,3-Dimercaptosuccinic acid self-assembled gold electrode for the simultaneous determination of epinephrine and dopamine. CHINESE CHEM LETT 2009. [DOI: 10.1016/j.cclet.2008.10.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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GUO L, ZHANG Y, LI Q. Spectrophotometric Determination of Dopamine Hydrochloride in Pharmaceutical, Banana, Urine and Serum Samples by Potassium Ferricyanide-Fe(III). ANAL SCI 2009; 25:1451-5. [DOI: 10.2116/analsci.25.1451] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Li GUO
- College of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control
| | - Yan ZHANG
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology
| | - Quanmin LI
- College of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control
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Su F, Wang F, Zhu R, Li H. Determination of 5-Hydroxytryptamine, Norepinephrine, Dopamine and Their Metabolites in Rat Brain Tissue by LC–ESI–MS–MS. Chromatographia 2008. [DOI: 10.1365/s10337-008-0879-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kotlyar M, Donahue C, Thuras P, Kushner MG, O'Gorman N, Smith EA, Adson DE. Physiological response to a speech stressor presented in a virtual reality environment. Psychophysiology 2008; 45:1034-7. [DOI: 10.1111/j.1469-8986.2008.00690.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Chen FN, Zhang YX, Zhang ZJ. Simultaneous Determination of Epinephrine, Noradrenaline and Dopamine in Human Serum Samples by High Performance Liquid Chromatography with Chemiluminescence Detection. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790183] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Li N, Ren W, Luo H. Caffeic Acid-Modified Glassy Carbon Electrode for the Simultaneous Determination of Epinephrine and Dopamine. ELECTROANAL 2007. [DOI: 10.1002/elan.200703871] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Chen SM, Liu JW, Thangamuthu R. Preparation, Characterization and Electrocatalytic Studies on Copper Complex Dye Film Modified Electrodes. ELECTROANAL 2007. [DOI: 10.1002/elan.200703875] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bose D, Durgbanshi A, Carda‐Broch S, Gil‐Agustí M, Capella‐Peiró M, Esteve‐Romero J. Direct Injection Analysis of Epinephrine, Norepinephrine, and their Naturally Occurring Derivatives in Serum by Micellar Liquid Chromatography with Electrochemical Detection. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070500330968] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Devasish Bose
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
| | - Abhilasha Durgbanshi
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
| | - Samuel Carda‐Broch
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
| | - Mayte Gil‐Agustí
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
| | - Maria‐Elisa Capella‐Peiró
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
| | - Josep Esteve‐Romero
- a Departament de Ciències Experimentals, Àrea de Química Analítica , Universitat Jaume I, Campus de Riu Sec , Castelló, Spain
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Saijo R, Tsunekawa S, Murakami H, Shirai N, Ikeda SI, Odashima K. Dopamine-selective potentiometric responses by new ditopic sensory elements based on a hexahomotrioxacalix[3]arene. Bioorg Med Chem Lett 2007; 17:767-71. [PMID: 17112724 DOI: 10.1016/j.bmcl.2006.10.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Revised: 10/18/2006] [Accepted: 10/25/2006] [Indexed: 11/29/2022]
Abstract
New ditopic sensory elements 2 and 3 for catecholamines based on a hexahomotrioxacalix[3]arene, with a boronic acid substituent appended, were designed and synthesized. As an interesting mode of molecular recognition at membrane surfaces, the host, when incorporated into poly(vinyl chloride) (PVC) liquid membranes, displayed excellent potentiometric selectivity for dopamine over other catecholamines (noradrenaline and adrenaline) and inorganic cations (Na+, K+, and NH4+).
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Affiliation(s)
- Ryosuke Saijo
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Mizuho-ku, Nagoya 467-8603, Japan
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