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Tang K, Mahata SK. Determination of Catecholamines in a Small Volume (25 μL) of Plasma from Conscious Mouse Tail Vein. Methods Mol Biol 2023; 2565:331-342. [PMID: 36205904 PMCID: PMC10798352 DOI: 10.1007/978-1-0716-2671-9_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The determination of plasma catecholamine levels is commonly used as a measure of the sympathetic nervous system's response to stress and is highly important for diagnosis, therapy, and prognosis of cardiovascular diseases, catecholamine-secreting tumors arising from the chromaffin cells of the sympathoadrenal system, and affective disorders. Diseases in which catecholamines are significantly elevated include pheochromocytoma, Parkinson's disease, Alzheimer's disease, neuroblastoma, ganglioneuroblastoma, von Hippel-Lindau disease, baroreflex failure, chemodectina (nonchromaffin paraganglioma), and multiple endocrine neoplasia. Plasma norepinephrine levels provide a guide to prognosis in patients with stable, chronic, and congestive heart diseases. The method described here for the determination of plasma catecholamines is based on the principle that plasma catecholamines are selectively adsorbed on acid-washed alumina at pH 8.7 and then eluted at a pH between 1.0 and 2.0. Upon injection, catecholamines in elutes were separated by a reversed phase C-18 column. After separation, the catecholamines present within the mobile phase enter the electrochemical detector. Electrochemical detection occurs because electroactive compounds oxidize at a certain potential and thereby liberate electrons that create measurable current. Catecholamines readily form quinones under these conditions, get oxidized, release two electrons, and create current. The electrochemical detector detects this electrical current that linearly correlates to the catecholamine concentration loaded into the ultra-performance liquid chromatography instrument. A 15-min mixing time during the adsorption and desorption steps was found to be optimal. If the washing step was omitted, the catecholamines could not be eluted from the acid-washed alumina. To prevent dilution, the alumina had to be centrifuged and not aspirated to dryness after the washing step. We report here that by changing the range in the electrochemical detector, plasma catecholamines were measured with only 12.5 μL of plasma and more reliably with 25 μL of plasma. The detection limit was 1 ng/mL. This assay method is very useful as blood can be collected from the tail vein in a conscious mouse and the same mouse can be used for time-dependent or age-dependent studies.
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Affiliation(s)
- Kechun Tang
- VA San Diego Healthcare System, San Diego, CA, USA
| | - Sushil K Mahata
- VA San Diego Healthcare System, San Diego, CA, USA.
- Department of Medicine, University of California San Diego, La Jolla, CA, USA.
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Makam P, Yamijala SSRKC, Bhadram VS, Shimon LJW, Wong BM, Gazit E. Single amino acid bionanozyme for environmental remediation. Nat Commun 2022; 13:1505. [PMID: 35314678 PMCID: PMC8938493 DOI: 10.1038/s41467-022-28942-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/21/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractEnzymes are extremely complex catalytic structures with immense biological and technological importance. Nevertheless, their widespread environmental implementation faces several challenges, including high production costs, low operational stability, and intricate recovery and reusability. Therefore, the de novo design of minimalistic biomolecular nanomaterials that can efficiently mimic the biocatalytic function (bionanozymes) and overcome the limitations of natural enzymes is a critical goal in biomolecular engineering. Here, we report an exceptionally simple yet highly active and robust single amino acid bionanozyme that can catalyze the rapid oxidation of environmentally toxic phenolic contaminates and serves as an ultrasensitive tool to detect biologically important neurotransmitters similar to the laccase enzyme. While inspired by the laccase catalytic site, the substantially simpler copper-coordinated bionanozyme is ∼5400 times more cost-effective, four orders more efficient, and 36 times more sensitive compared to the natural protein. Furthermore, the designed mimic is stable under extreme conditions (pH, ionic strength, temperature, storage time), markedly reusable for several cycles, and displays broad substrate specificity. These findings hold great promise in developing efficient bionanozymes for analytical chemistry, environmental protection, and biotechnology.
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Shahraki S, Masrournia M, Karimi-Maleh H. Fabrication of Electrochemical Sensor for Epinine Determination
Amplified with MgO/CNTs Nanocomposite and Ionic Liquid. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411017666210303091301] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Catecholamines are a large group of pharmacological and biological compounds
that are widely used in biological systems. These compounds are prepared both naturally
and synthetically with many key roles in the human body and its activities. Therefore, many researchers
focused on the identification and determination of catecholamines in biological samples.
Methods:
MgO/SWCNTs were synthesized through the chemical precipitation method. In addition,
cyclic voltammetry, differential pulse voltammetry, and chronoamperometric methods were used
for the electro-oxidation reaction study of epinine at the surface of the modified electrode.
Results:
Carbon paste electrode (CPE) modified with MgO/SWCNTs nanocomposite and 1-butyl-
3-methylimidazolium methanesulfonate (BMMS) was used as an electrochemical sensor for the
determination of epinine. The results showed a linear dynamic range of 5.0 nM-250 μM with a
detection limit of 0.1 nM for epinine determination using MgO/SWCNTs/BMMS/CPE as a sensor.
Conclusion:
In the present study, a highly sensitive electrochemical sensor was designed and fabricated
as an analytical tool for the determination of epinine. MgO/SWCNTs/BMMS/CPE was
successfully used for the determination of epinine in water and dextrose saline with an acceptable
recovery range of 98.7%-102.72%.
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Affiliation(s)
- Shirin Shahraki
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad,Iran
| | | | - Hassan Karimi-Maleh
- Department of Chemical Engineering, Laboratory of Nanotechnology, Quchan University of Advanced Technology, Quchan,Iran
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Goldstein DS. Stress and the "extended" autonomic system. Auton Neurosci 2021; 236:102889. [PMID: 34656967 PMCID: PMC10699409 DOI: 10.1016/j.autneu.2021.102889] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/06/2021] [Accepted: 09/28/2021] [Indexed: 12/22/2022]
Abstract
This review updates three key concepts of autonomic neuroscience-stress, the autonomic nervous system (ANS), and homeostasis. Hans Selye popularized stress as a scientific idea. He defined stress variously as a stereotyped response pattern, a state that evokes this pattern, or a stimulus that evokes the state. According to the "homeostat" theory stress is a condition where a comparator senses a discrepancy between sensed afferent input and a response algorithm, the integrated error signal eliciting specific patterns of altered effector outflows. Scientific advances since Langley's definition of the ANS have incited the proposal here of the "extended autonomic system," or EAS, for three reasons. (1) Several neuroendocrine systems are bound inextricably to Langley's ANS. The first to be described, by Cannon in the early 1900s, involves the hormone adrenaline, the main effector chemical of the sympathetic adrenergic system. Other neuroendocrine systems are the hypothalamic-pituitary-adrenocortical system, the arginine vasopressin system, and the renin-angiotensin-aldosterone system. (2) An evolving body of research links the ANS complexly with inflammatory/immune systems, including vagal anti-inflammatory and catecholamine-related inflammasomal components. (3) A hierarchical network of brain centers (the central autonomic network, CAN) regulates ANS outflows. Embedded within the CAN is the central stress system conceptualized by Chrousos and Gold. According to the allostasis concept, homeostatic input-output curves can be altered in an anticipatory, feed-forward manner; and prolonged or inappropriate allostatic adjustments increase wear-and-tear (allostatic load), resulting in chronic, stress-related, multi-system disorders. This review concludes with sections on clinical and therapeutic implications of the updated concepts offered here.
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Affiliation(s)
- David S Goldstein
- Autonomic Medicine Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA; Autonomic Medicine Section, CNP/DIR/NINDS/NIH, 9000 Rockville Pike MSC-1620, Building 10 Room 8N260, Bethesda, MD 20892-1620, USA..
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Goldstein DS, Castillo G, Sullivan P, Sharabi Y. Differential Susceptibilities of Catecholamines to Metabolism by Monoamine Oxidases. J Pharmacol Exp Ther 2021; 379:253-259. [PMID: 34503991 DOI: 10.1124/jpet.121.000826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/07/2021] [Indexed: 11/22/2022] Open
Abstract
The endogenous catecholamines dopamine (DA), norepinephrine (NE), and epinephrine (EPI) play key roles in neurobehavioral, cardiovascular, and metabolic processes; various clinical disorders; and effects of numerous drugs. Steps in intracellular catecholamine synthesis and metabolism were delineated long ago, but there remains a knowledge gap. Catecholamines are metabolized by two isoforms of monoamine oxidase (MAO), MAO-A and MAO-B, and although the anatomic localization of MAO-A and MAO-B and substrate specificities of enzyme inhibitors are well characterized, relative susceptibilities of the endogenous catecholamines to enzymatic oxidation by MAO-A and MAO-B have not been studied systematically. MAOs catalyze the conversion of catecholamines to catecholaldehydes-3,4-dihydroxyphenylacetaldehyde (DOPAL) from DA and 3,4-dihydroxyphenylglycolaldehyde (DOPEGAL) from NE and EPI. In this study we exploited the technical ability to assay DOPAL and DOPEGAL simultaneously with the substrate catecholamines to compare DA, NE, and EPI in their metabolism by MAO-A and MAO-B. For both MAO isoforms, DA was the better substrate compared to NE or EPI, which were metabolized equally. Since catecholaminergic neurons express mainly MAO-A, the finding that MAO-A is more efficient than MAO-B in metabolizing endogenous catecholamines reinforces the view that the predominant route of intraneuronal enzymatic oxidation of catecholamines is via MAO-A. The results have implications for clinical neurochemistry, experimental therapeutics, and computational models of catecholaminergic neurodegeneration. For instance, the greater susceptibility of DA than the other catecholamines to both MAO isoforms can help explain relatively high concentrations of the deaminated DA metabolite 3,4-dihydroxyphenylacetic acid than of the NE metabolite 3,4-dihydroxyphenylglycol in human plasma and urine. SIGNIFICANCE STATEMENT: Endogenous catecholamines are metabolized by monoamine oxidase (MAO)-A and -B, yielding the catecholaldehydes 3,4-dihydroxyphenylacetaldehyde (DOPAL) from dopamine (DA) and 3,4-dihydroxyphenylglycolaldehyde (DOPEGAL) from norepinephrine (NE) and epinephrine (EPI). Based on measurements of DOPAL and DOPEGAL production, DA is a better substrate than NE or EPI for both MAO isoforms, and MAO-A is more efficient than MAO-B in metabolizing DA, NE, and EPI. MAO-A is the main route of intraneuronal metabolism of endogenous catecholamines.
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Affiliation(s)
- David S Goldstein
- Autonomic Medicine Section, CNP/DIR/NINDS/NIH, Bethesda, Maryland (D.G., G.C., P.S.); NIH Academy Enrichment Program, OD/NIH (G.C.); and Sackler Faculty of Medicine, Tel Aviv University, Israel (Y.S.)
| | - Genessis Castillo
- Autonomic Medicine Section, CNP/DIR/NINDS/NIH, Bethesda, Maryland (D.G., G.C., P.S.); NIH Academy Enrichment Program, OD/NIH (G.C.); and Sackler Faculty of Medicine, Tel Aviv University, Israel (Y.S.)
| | - Patti Sullivan
- Autonomic Medicine Section, CNP/DIR/NINDS/NIH, Bethesda, Maryland (D.G., G.C., P.S.); NIH Academy Enrichment Program, OD/NIH (G.C.); and Sackler Faculty of Medicine, Tel Aviv University, Israel (Y.S.)
| | - Yehonatan Sharabi
- Autonomic Medicine Section, CNP/DIR/NINDS/NIH, Bethesda, Maryland (D.G., G.C., P.S.); NIH Academy Enrichment Program, OD/NIH (G.C.); and Sackler Faculty of Medicine, Tel Aviv University, Israel (Y.S.)
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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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Tatarinova TV, Deiss T, Franckle L, Beaven S, Davis J. The Impact of MNRI Therapy on the Levels of Neurotransmitters Associated with Inflammatory Processes. Int J Mol Sci 2020; 21:E1358. [PMID: 32085403 PMCID: PMC7072967 DOI: 10.3390/ijms21041358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 02/13/2020] [Accepted: 02/14/2020] [Indexed: 01/02/2023] Open
Abstract
The neurotransmitter levels of representatives from five different diagnosis groups were tested before and after participation in the MNRI®-Masgutova Neurosensorimotor Reflex Intervention. The purpose of this study was to ascertain neurological impact on (1) Developmental disorders, (2) Anxiety disorders/OCD (Obsessive Compulsive Disorder), PTSD (Post-Traumatic Stress disorder), (3) Palsy/Seizure disorders, (4) ADD/ADHD (Attention Deficit Disorder/Attention Deficit Disorder Hyperactive Disorder), and (5) ASD (Autism Spectrum Disorder) disorders. Each participant had a form of neurological dysregulation and typical symptoms respective to their diagnosis. These diagnoses have a severe negative impact on the quality of life, immunity, stress coping, cognitive skills, and social assimilation. This study showed a trend towards optimization and normalization of neurological and immunological functioning, thus supporting the claim that the MNRI method is an effective non-pharmacological neuromodulation treatment of neurological disorders. The effects of MNRI on inflammation have not yet been assessed. The resulting post-MNRI changes in participants' neurotransmitters show significant adjustments in the regulation of the neurotransmitter resulting in being calmer, a decrease of hypervigilance, an increase in stress resilience, behavioral and emotional regulation improvements, a more positive emotional state, and greater control of cognitive processes. In this paper, we demonstrate that the MNRI approach is an intervention that reduces inflammation. It is also likely to reduce oxidative stress and encourage homeostasis of excitatory neurotransmitters. MNRI may facilitate neurodevelopment, build stress resiliency, neuroplasticity, and optimal learning opportunity. There have been no reported side effects of MNRI treatments.
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Affiliation(s)
- Tatiana V. Tatarinova
- Department of Biology, University of La Verne, La Verne, CA 91750, USA
- Functional Genomics Group, Vavilov Institute for General Genetics, Moscow 119991, Russia
- Forest Genomics Laboratory, Siberian Federal University, Krasnoyarsk 660041, Russia
- Bioinformatics Center, Information Transmission Problems Institute, Moscow 127051, Russia
| | - Trina Deiss
- Research Department, United1Front Foundation, Minneapolis, MN 55111, USA;
| | - Lorri Franckle
- Laser Health Department, Laser Health, Orlando, FL 33709, USA;
| | - Susan Beaven
- Family Medicine, St. Petersburg Free Clinic, St. Petersburg, FL 33701, USA;
| | - Jeffrey Davis
- Family Medicine, Prairie Health and Wellness, Wichita, KS 67206, USA;
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Vilke GM, Mash DC, Pardo M, Bozeman W, Hall C, Sloane C, Wilson MP, Coyne CJ, Xie X, Castillo EM. EXCITATION study: Unexplained in-custody deaths: Evaluating biomarkers of stress and agitation. J Forensic Leg Med 2019; 66:100-106. [PMID: 31252195 DOI: 10.1016/j.jflm.2019.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/05/2019] [Accepted: 06/16/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Law enforcement personnel often confront violent and dangerous individuals suffering from Excited Delirium Syndrome (ExDS) who need emergent medical evaluation and treatment to optimize the best outcomes for this potentially lethal medical emergency. These subjects typically require physical restraint and use of force measures to control them. We sought to determine if stress-related biomarkers can differentiate ExDS subjects when compared with agitation and stress under other circumstances, including agitation and extreme physical exhaustion and restraint coupled with emotional stressors. METHODS This was a prospective multi-center study enrolling a convenience sample of patients who presented with agitation or ExDS. Patients were enrolled from three academic emergency departments (ED), two in the United States and one in Canada. Three study groups (SG) included: SG1) patients brought to the ED with ExDS based on the use of standardized clinical criteria; SG2) ED patients with acute agitation who were not in a clinical state of ExDS but required sedation; SG3) a laboratory control group of subjects exercised to physical exhaustion, restrained, and psychologically stressed with threat of Conducted Energy Device (CED) activation. We examined a panel of stress-related biomarkers, including norepinephrine (NE), cortisol, copeptin, orexin A, and dynorphin (Dyn) from the blood of enrolled subjects. RESULTS A total of 82 subjects were enrolled: 31 in the agitation group, 21 in the ExDS group, and 30 in the laboratory control group. Data were analyzed, comparing the findings between ExDS and the two other groups to determine if specific stress-related biomarkers are associated with ExDS. Biomarker comparisons between subjects identified with ExDS, agitation, and control groups demonstrated that cortisol levels were more elevated in the ExDS group compared with the other groups. Orexin was only significant in ExDs (with Agitated tendency but lot of variability in the group). NE and Dyn increased as response to stress in Agitated and ExDS. CONCLUSIONS Cortisol levels were more elevated in subjects in the ExDS group compared with the other comparison groups and orexin was elevated in ExDS compared to controls, a trend that did not reach statistical significance in the agitated group. The clinical or diagnostic significance of these difference have yet to be defined and warrants further study.
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Affiliation(s)
- Gary M Vilke
- University of California, San Diego Medical Center, Department of Emergency Medicine, San Diego, CA, USA.
| | - Deborah C Mash
- University of Miami Miller School of Medicine, Department of Neurology and Molecular and Cellular Pharmacology, Miami, FL, USA
| | - Marta Pardo
- University of Miami Miller School of Medicine, Department of Neurology and Molecular and Cellular Pharmacology, Miami, FL, USA
| | - William Bozeman
- Wake Forest University School of Medicine, Department of Emergency Medicine, Winston Salem, NC, USA
| | - Christine Hall
- University of British Columbia, Department of Emergency Medicine, Island Health, Victoria, Canada
| | - Christian Sloane
- University of California, San Diego Medical Center, Department of Emergency Medicine, San Diego, CA, USA
| | | | - Christopher J Coyne
- University of California, San Diego Medical Center, Department of Emergency Medicine, San Diego, CA, USA
| | - Xiaobin Xie
- University of Miami Miller School of Medicine, Department of Neurology and Molecular and Cellular Pharmacology, Miami, FL, USA
| | - Edward M Castillo
- University of California, San Diego Medical Center, Department of Emergency Medicine, San Diego, CA, USA
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Substantial renal conversion of L-threo-3,4-dihydroxyphenylserine (droxidopa) to norepinephrine in patients with neurogenic orthostatic hypotension. Clin Auton Res 2018; 29:113-117. [PMID: 30229336 DOI: 10.1007/s10286-018-0564-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 08/31/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND The pressor effect of L-threo-3,4-dihydroxyphenylserine (L-DOPS, droxidopa, Northera™) results from conversion of L-DOPS to norepinephrine (NE) in cells expressing L-aromatic-amino-acid decarboxylase (LAAAD). After L-DOPS administration the increase in systemic plasma NE is too small to explain the increase in blood pressure. Renal proximal tubular cells abundantly express LAAAD. Since NE generated locally in the kidneys could contribute to the pressor effect of L-DOPS, in this study we assessed renal conversion of L-DOPS to NE. METHODS Ten patients who were taking L-DOPS for symptomatic orthostatic hypotension had blood and urine sampled about 2 h after the last L-DOPS dose. L-DOPS and NE were assayed by alumina extraction followed by liquid chromatography with electrochemical detection. Data were compared in patients off vs. on levodopa/carbidopa. RESULTS In patients off levodopa/carbidopa the ratio of NE/L-DOPS in urine averaged 63 times that in plasma (p = 0.0009 by t test applied to log-transformed data). In marked contrast, in the three patients on levodopa/carbidopa the ratio of NE/L-DOPS in urine did not differ from that in plasma. CONCLUSION There is extensive renal production of NE from L-DOPS. Carbidopa seems to attenuate the conversion of L-DOPS to NE in the kidneys. Further research is needed to assess whether the proposed paracrine effect of L-DOPS in the kidneys contributes to the systemic pressor response.
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Goldstein DS, Cheshire WP. Roles of catechol neurochemistry in autonomic function testing. Clin Auton Res 2018; 28:273-288. [PMID: 29705971 DOI: 10.1007/s10286-018-0528-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 04/10/2018] [Indexed: 12/14/2022]
Abstract
Catechols are a class of compounds that contain adjacent hydroxyl groups on a benzene ring. Endogenous catechols in human plasma include the catecholamines norepinephrine, epinephrine (adrenaline), and dopamine; the catecholamine precursor DOPA, 3,4-dihydroxyphenylglycol (DHPG), which is the main neuronal metabolite of norepinephrine; and 3,4-dihydroxyphenylacetic acid (DOPAC), which is the main neuronal metabolite of dopamine. In the diagnostic evaluation of patients with known or suspected dysautonomias, measurement of plasma catechols is rarely diagnostic but often is informative. This review summarizes the roles of clinical catechol neurochemistry in autonomic function testing.
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Affiliation(s)
- David S Goldstein
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, 9000 Rockville Pike MSC-1620, Building 10 Room 8N260, Bethesda, MD, 20892-1620, USA.
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Mamidala MP, Rajesh N, Rajesh V. Mass spectrometric evaluation of neurotransmitter levels in IMR 32 cell line in response to Ayurvedic medicines. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1413-1422. [PMID: 27197034 DOI: 10.1002/rcm.7571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/15/2016] [Accepted: 03/16/2016] [Indexed: 06/05/2023]
Abstract
RATIONALE Ayurvedic herbal medicines are administered as part of disease management for many neurodevelopmental disorders like Autism Spectrum Disorder (ASD) and linked comorbid challenges. The biochemistry of the behavioral abnormalities as observed in comorbid conditions is already reported to involve neurotransmitters like gamma-aminobutyric acid (GABA), serotonin (5-HT) and dopamine (DA). The aim of our study is to evaluate the effect of ayurvedic medicines on neurotransmitter levels in IMR 32. Such a study will give some insight into the molecular mechanism of the action of these medicines and help us to understand their contributions in neurotransmitter homeostasis. METHODS Solutions of Brahmi, Brahmi vati, Brahmi ghrita and Saraswata ghrita, each at 50 μM, were added to differentiated IMR 32 cells and grown for 24 h. The cell secretion was analysed by ultra-fast liquid chromatography/mass spectrometry (UFLC/MS) in electrospray ionisation (ESI) mode for the neurotransmitters DA, 5-HT and GABA. The mobile phase selected was 0.1% formic acid with 15 μg/mL Na2 -EDTA (A) and 0.1% formic acid in acetonitrile (B) introduced in the ratio of 92:8. RESULTS All neurotransmitters under study were eluted within 7 min with GABA eluting at 3.82 min, 5-HT at 4.48 min and DA at 5.47 min, respectively. Linearity was excellent with a correlation coefficient (R(2) ) of 0.999; repeatability and accuracy were also within acceptable range. All herbal drugs evaluated increased the neurotransmitter levels and Brahmi vati increased the neurotransmitter levels to a larger extent. CONCLUSIONS Decreased levels of neurotransmitters were observed in behavioral abnormalities which were also observed in children with ASD. Herbal medicines given as part of ayurvedic medicine increased the neurotransmitter levels in IMR 32. Thus, these ayurvedic medicines when prescribed to children with ASD might alleviate the abnormal behavioral symptoms by maintaining neurotransmitter homeostasis. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Madhu Poornima Mamidala
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani - Hyderabad Campus, India
| | - N Rajesh
- Department of Chemistry, Birla Institute of Technology & Science, Pilani - Hyderabad Campus, India
| | - Vidya Rajesh
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani - Hyderabad Campus, India
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Fagermoen E, Sulheim D, Winger A, Andersen AM, Gjerstad J, Godang K, Rowe PC, Saul JP, Skovlund E, Wyller VB. Effects of low-dose clonidine on cardiovascular and autonomic variables in adolescents with chronic fatigue: a randomized controlled trial. BMC Pediatr 2015; 15:117. [PMID: 26357864 PMCID: PMC4566847 DOI: 10.1186/s12887-015-0428-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Accepted: 08/20/2015] [Indexed: 11/24/2022] Open
Abstract
Background Chronic Fatigue Syndrome (CFS) is a common and disabling condition in adolescence with few treatment options. A central feature of CFS is orthostatic intolerance and abnormal autonomic cardiovascular control characterized by sympathetic predominance. We hypothesized that symptoms as well as the underlying pathophysiology might improve by treatment with the alpha2A–adrenoceptor agonist clonidine. Methods A total of 176 adolescent CFS patients (12–18 years) were assessed for eligibility at a single referral center recruiting nation-wide. Patients were randomized 1:1 by a computer system and started treatment with clonidine capsules (25 μg or 50 μg twice daily, respectively, for body weight below/above 35 kg) or placebo capsules for 9 weeks. Double-blinding was provided. Data were collected from March 2010 until October 2012 as part of The Norwegian Study of Chronic Fatigue Syndrome in Adolescents: Pathophysiology and Intervention Trial (NorCAPITAL). Effect of clonidine intervention was assessed by general linear models in intention-to-treat analyses, including baseline values as covariates in the model. Results A total of 120 patients (clonidine group n = 60, placebo group n = 60) were enrolled and started treatment. There were 14 drop-outs (5 in the clonidine group, 9 in the placebo group) during the intervention period. At 8 weeks, the clonidine group had lower plasma norepinephrine (difference = 205 pmol/L, p = 0.05) and urine norepinephrine/creatinine ratio (difference = 3.9 nmol/mmol, p = 0.002). During supine rest, the clonidine group had higher heart rate variability in the low-frequency range (LF-HRV, absolute units) (ratio = 1.4, p = 0.007) as well as higher standard deviation of all RR-intervals (SDNN) (difference = 12.0 ms, p = 0.05); during 20° head-up tilt there were no statistical differences in any cardiovascular variable. Symptoms of orthostatic intolerance did not change during the intervention period. Conclusions Low-dose clonidine reduces catecholamine levels in adolescent CFS, but the effects on autonomic cardiovascular control are sparse. Clonidine does not improve symptoms of orthostatic intolerance. Trial registration Clinical Trials ID: NCT01040429, date of registration 12/28/2009.
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Affiliation(s)
- Even Fagermoen
- Institute of Clinical Medicine, Medical Faculty, University of Oslo, P.O.Box 1171, Blindern, 0318, Oslo, Norway. .,Department of Anaesthesiology and Critical Care, Oslo University Hospital, P.O.Box 4950, Nydalen, 0424, Oslo, Norway.
| | - Dag Sulheim
- Department of Paediatrics, Oslo University Hospital, P.O.Box 4950, Nydalen, 0424, Oslo, Norway. .,Department of Paediatrics, Lillehammer County Hospital, P.O.Box 104, 2381, Brumunddal, Norway.
| | - Anette Winger
- Institute of Nursing Sciences, Oslo and Akershus University College of Applied Sciences, P.O. Box 4 St., Olavs plass, 0130, Oslo, Norway.
| | - Anders M Andersen
- Department of Pharmacology, Oslo University Hospital, P.O.Box 4950, Nydalen, 0424, Oslo, Norway.
| | - Johannes Gjerstad
- National Institute of Occupational Health, P.O Box 8149, Dep, 0033, Oslo, Norway. .,Department of Biosciences, University of Oslo, P.O.Box 1066, Blindern, 0316, Oslo, Norway.
| | - Kristin Godang
- Section of Specialized Endocrinology, Department of Endocrinology, Oslo University Hospital Rikshospitalet, P.O.Box 4950, Nydalen, 0424, Oslo, Norway.
| | - Peter C Rowe
- Department of Paediatrics, Johns Hopkins University School of Medicine, 200 N. Wolfe Street, Baltimore, MD, 21287, USA.
| | - J Philip Saul
- Department of Paediatrics, Medical University of South Carolina, 169 Ashley Avenue, Charleston, SC, 29425, USA.
| | - Eva Skovlund
- Department of Pharmaceutical Science, University of Oslo, P.O.Box 1068, Blindern, 0316, Oslo, Norway. .,Norwegian Institute of Public Health, P.O.Box 4404, Nydalen, 0403, Oslo, Norway.
| | - Vegard Bruun Wyller
- Institute of Clinical Medicine, Medical Faculty, University of Oslo, P.O.Box 1171, Blindern, 0318, Oslo, Norway. .,Department of Paediatrics, Akershus University Hospital, P.O.Box 1000, 1478, Lørenskog, Norway.
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14
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Qin Q, Li H, Shi X, Xu G. Facile synthesis of Fe3
O4
@polyethyleneimine modified with 4-formylphenylboronic acid for the highly selective extraction of major catecholamines from human urine. J Sep Sci 2015; 38:2857-64. [DOI: 10.1002/jssc.201500377] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 05/10/2015] [Accepted: 05/11/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Qian Qin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Hua Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Xianzhe Shi
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Guowang Xu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
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15
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16
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Goldstein DS, Kopin IJ, Sharabi Y. Catecholamine autotoxicity. Implications for pharmacology and therapeutics of Parkinson disease and related disorders. Pharmacol Ther 2014; 144:268-82. [PMID: 24945828 PMCID: PMC4591072 DOI: 10.1016/j.pharmthera.2014.06.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 05/29/2014] [Indexed: 02/07/2023]
Abstract
Several neurodegenerative diseases involve loss of catecholamine neurons-Parkinson disease is a prototypical example. Catecholamine neurons are rare in the nervous system, and why they are vulnerable in PD and related disorders has been mysterious. Accumulating evidence supports the concept of "autotoxicity"-inherent cytotoxicity of catecholamines and their metabolites in the cells in which they are produced. According to the "catecholaldehyde hypothesis" for the pathogenesis of Parkinson disease, long-term increased build-up of 3,4-dihydroxyphenylacetaldehyde (DOPAL), the catecholaldehyde metabolite of dopamine, causes or contributes to the eventual death of dopaminergic neurons. Lewy bodies, a neuropathologic hallmark of PD, contain precipitated alpha-synuclein. Bases for the tendency of alpha-synuclein to precipitate in the cytoplasm of catecholaminergic neurons have also been mysterious. Since DOPAL potently oligomerizes and aggregates alpha-synuclein, the catecholaldehyde hypothesis provides a link between alpha-synucleinopathy and catecholamine neuron loss in Lewy body diseases. The concept developed here is that DOPAL and alpha-synuclein are nodes in a complex nexus of interacting homeostatic systems. Dysfunctions of several processes, including decreased vesicular sequestration of cytoplasmic catecholamines, decreased aldehyde dehydrogenase activity, and oligomerization of alpha-synuclein, lead to conversion from the stability afforded by negative feedback regulation to the instability, degeneration, and system failure caused by induction of positive feedback loops. These dysfunctions result from diverse combinations of genetic predispositions, environmental exposures, stress, and time. The notion of catecholamine autotoxicity has several implications for treatment, disease modification, and prevention. Conversely, disease modification clinical trials would provide key tests of the catecholaldehyde hypothesis.
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Affiliation(s)
- David S Goldstein
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
| | - Irwin J Kopin
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
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17
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Rudolphi A, Boos KS, Seidel D. Coupled-column HPLC analysis of free urinary catecholamines using restricted access affinity precolumn and micro-particulate nonporous silica analytical column. Chromatographia 2014. [DOI: 10.1007/bf02688101] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Wei F, Wu Y, Xu G, Gao Y, Yang J, Liu L, Zhou P, Hu Q. Molecularly imprinted polymer based on CdTe@SiO2 quantum dots as a fluorescent sensor for the recognition of norepinephrine. Analyst 2014; 139:5785-92. [DOI: 10.1039/c4an00951g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fluorescent sensor with recognition ability for norepinephrine was simply prepared and actually used to determine norepinephrine in rat plasma.
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Affiliation(s)
- Fangdi Wei
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Yanzi Wu
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Guanhong Xu
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Yankun Gao
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Jing Yang
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Liping Liu
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Ping Zhou
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
| | - Qin Hu
- School of Pharmacy
- Nanjing Medical University
- Nanjing 211166, China
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19
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Naccarato A, Gionfriddo E, Sindona G, Tagarelli A. Development of a simple and rapid solid phase microextraction-gas chromatography-triple quadrupole mass spectrometry method for the analysis of dopamine, serotonin and norepinephrine in human urine. Anal Chim Acta 2013; 810:17-24. [PMID: 24439500 DOI: 10.1016/j.aca.2013.11.058] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 11/22/2013] [Accepted: 11/29/2013] [Indexed: 12/29/2022]
Abstract
The work aims at developing a simple and rapid method for the quantification of dopamine (DA), serotonin (5-HT) and norepinephrine (NE) in human urine. The urinary levels of these biogenic amines can be correlated with several pathological conditions concerning heart disease, stress, neurological disorders and cancerous tumors. The proposed analytical approach is based on the use of solid phase microextraction (SPME) combined with gas chromatography-triple quadrupole mass spectrometry (GC-QqQ-MS) after a fast derivatization of both aliphatic amino and phenolic moieties by propyl chloroformate. The variables influencing the derivatization reaction were reliably optimized by the multivariate approach of "Experimental design". The optimal conditions were obtained by performing derivatization with 100μL of propyl chloroformate and 100μL of pyridine. The extraction ability of five commercially available SPME fibers was evaluated in univariate mode and the best results were obtained using the polyacrylate fiber. The variables affecting the efficiency of SPME analysis were again optimized by the multivariate approach of "Experimental design" and, in particular, a central composite design (CCD) was applied. The optimal values were extraction in 45min at room temperature, desorption temperature at 300°C, no addition of NaCl. Assay of derivatized analytes was performed by using a gas chromatography-triple quadrupole mass spectrometry (GC-QqQ-MS) system in selected reaction monitoring (SRM) acquisition. An evaluation of all analytical parameters demonstrates that the developed method provides satisfactory results. Indeed, very good linearities were achieved in the tested calibration range with correlation coefficient values of 0.9995, 0.9999 and 0.9997 for DA, 5-HT and NE, respectively. Accuracies and RSDs calculated for between-run and tested at concentrations of 30, 200, and 800μg L(-1) were in the range from 92.8% to 103.0%, and from 0.67 to 4.5%, respectively. Finally, the LOD values obtained can be considered very good (0.587, 0.381 and 1.23μg L(-1) for DA, 5-HT and NE, respectively).
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Affiliation(s)
- Attilio Naccarato
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci Cubo 12/C, Arcavacata di Rende (CS), I-87030 Cosenza, Italy
| | - Emanuela Gionfriddo
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci Cubo 12/C, Arcavacata di Rende (CS), I-87030 Cosenza, Italy
| | - Giovanni Sindona
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci Cubo 12/C, Arcavacata di Rende (CS), I-87030 Cosenza, Italy
| | - Antonio Tagarelli
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci Cubo 12/C, Arcavacata di Rende (CS), I-87030 Cosenza, Italy.
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20
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Hu H, Li Z, Zhang X, Xu C, Guo Y. Rapid determination of catecholamines in urine samples by nonaqueous microchip electrophoresis with LIF detection. J Sep Sci 2013; 36:3419-25. [PMID: 24038935 DOI: 10.1002/jssc.201300342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 07/11/2013] [Accepted: 08/03/2013] [Indexed: 11/06/2022]
Abstract
A method was developed for the rapid separation of catecholamines by nonaqueous microchip electrophoresis (NAMCE) with LIF detection, A homemade pump-free negative pressure sampling device was used for rapid bias-free sampling in NAMCE, the injection time was 0.5 s and the electrophoresis separation conditions were optimized. Under the optimized conditions, the samples were separated completely in <1 min. The average migration times of the epinephrine (E), dopamine (DA), and norepinephrine (NE) were 34.26, 43.81, and 50.07 s, with an RSD of 1.05, 1.26, and 0.89% (n = 7), respectively. The linearity of the method ranged from 0.0125 to 2.0 mg/L for E and 0.025~4.0 mg/L for DA and NE, with correlation coefficients ranging between 0.9978 and 0.9986. The detection limits of E, DA, and NE were 2.5, 5.0, and 5.0 μg/L, respectively. The recoveries of E, DA, and NE in spiked urine samples were between 86 and 103%, with RSDs of 4.5~6.8% (n = 5). The proposed NAMCE with LIF detection combined with a pump-free negative pressure sampling device is a simple, inexpensive, energy efficient, miniaturized system that can be successfully applied for the determination of catecholamines in urine samples.
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Affiliation(s)
- Hongmei Hu
- Key Lab of Mariculture and Enhancement of Zhejiang Province, Marine Fishery Institute of Zhejiang Province, Zhoushan, China
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21
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Tang W, Ge S, Gao F, Wang G, Wang Q, He P, Fang Y. On-line sample preconcentration technique based on a dynamic pH junction in CE-amperometric detection for the analysis of biogenic amines in urine. Electrophoresis 2013; 34:2041-8. [DOI: 10.1002/elps.201300116] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 04/04/2013] [Accepted: 04/07/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Wanrong Tang
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Shuli Ge
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Fan Gao
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Guan Wang
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Qingjiang Wang
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Pingang He
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
| | - Yuzhi Fang
- Department of Chemistry; East China Normal University; Shanghai; P. R. China
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22
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Dunand M, Gubian D, Stauffer M, Abid K, Grouzmann E. High-Throughput and Sensitive Quantitation of Plasma Catecholamines by Ultraperformance Liquid Chromatography–Tandem Mass Spectrometry Using a Solid Phase Microwell Extraction Plate. Anal Chem 2013; 85:3539-44. [DOI: 10.1021/ac4004584] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marielle Dunand
- Service de
Biomédecine, Laboratoire des Catécholamines et Peptides and ‡Maintenance Biomédicale
des Laboratoires, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland
| | - Danilo Gubian
- Service de
Biomédecine, Laboratoire des Catécholamines et Peptides and ‡Maintenance Biomédicale
des Laboratoires, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland
| | - Maxime Stauffer
- Service de
Biomédecine, Laboratoire des Catécholamines et Peptides and ‡Maintenance Biomédicale
des Laboratoires, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland
| | - Karim Abid
- Service de
Biomédecine, Laboratoire des Catécholamines et Peptides and ‡Maintenance Biomédicale
des Laboratoires, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland
| | - Eric Grouzmann
- Service de
Biomédecine, Laboratoire des Catécholamines et Peptides and ‡Maintenance Biomédicale
des Laboratoires, Centre Hospitalier Universitaire Vaudois, 1011, Lausanne, Switzerland
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23
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Duce JA, Ayton S, Miller AA, Tsatsanis A, Lam LQ, Leone L, Corbin JE, Butzkueven H, Kilpatrick TJ, Rogers JT, Barnham KJ, Finkelstein DI, Bush AI. Amine oxidase activity of β-amyloid precursor protein modulates systemic and local catecholamine levels. Mol Psychiatry 2013; 18:245-54. [PMID: 22212595 DOI: 10.1038/mp.2011.168] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The catecholamines dopamine (DA), norepinephrine (NE) and epinephrine (E) are neurotransmitters and hormones that mediate stress responses in tissues and plasma. The expression of β-amyloid precursor protein (APP) is responsive to stress and is high in tissues rich in catecholamines. We recently reported that APP is a ferroxidase, subsuming, in neurons and other cells, the iron-export activity that ceruloplasmin mediates in glia. Here we report that, like ceruloplasmin, APP also oxidizes synthetic amines and catecholamines catalytically (K(m) NE=0.27 mM), through a site encompassing its ferroxidase motif and selectively inhibited by zinc. Accordingly, APP knockout mice have significantly higher levels of DA, NE and E in brain, plasma and select tissues. Consistent with this, these animals have increased resting heart rate and systolic blood pressure as well as suppressed prolactin and lymphocyte levels. These findings support a role for APP in extracellular catecholaminergic clearance.
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Affiliation(s)
- J A Duce
- The Mental Health Research Institute, The University of Melbourne, Parkville, VIC, Australia
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24
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Zhang X, Xu S, Lim JM, Lee YI. Molecularly imprinted solid phase microextraction fiber for trace analysis of catecholamines in urine and serum samples by capillary electrophoresis. Talanta 2012; 99:270-6. [DOI: 10.1016/j.talanta.2012.05.050] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 05/22/2012] [Accepted: 05/23/2012] [Indexed: 11/27/2022]
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25
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Bouri M, Lerma-García MJ, Salghi R, Zougagh M, Ríos A. Selective extraction and determination of catecholamines in urine samples by using a dopamine magnetic molecularly imprinted polymer and capillary electrophoresis. Talanta 2012; 99:897-903. [PMID: 22967640 DOI: 10.1016/j.talanta.2012.07.053] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 07/14/2012] [Accepted: 07/19/2012] [Indexed: 11/15/2022]
Abstract
A rapid and selective method for the extraction and determination of catecholamines (CLs) from urine samples has been successfully developed using a magnetic molecularly imprinted polymer (MMIP) as a sorbent material. The MMIP has been prepared using dopamine hydrochloride (DA) as template molecule, methacrylic acid (MAA) as functional monomer, ethylene glycol dimethacrylate (EDMA) as cross-linking agent and Fe(3)O(4) magnetite as magnetic component. The extraction was carried out by stirring urine samples with the magnetic polymer. When the extraction was completed, the MMIP, together with the captured analytes, was easily separated from the sample matrix by an adscititious magnet. The analytes desorbed from the MMIP were determined by capillary electrophoresis (CE). It was shown that the MMIP had high affinity and selectivity toward DA and other structurally related CLs such as 3-methoxytyramine hydrochloride (MT), DL-normetanephrine hydrochloride (NME), DL-norephinephrine hydrochloride (NE) and (±) epinephrine (E). Different parameters affecting the extraction efficiency were evaluated in order to achieve the optimal pre-concentration of the analytes and to reduce non-specific interactions. Under the optimal conditions, the CL limits of detection were at the 0.04-0.06 μM range. The relative standard deviations of migration time and response ranged from 0.7% to 1.4% and from 2.9% to 5.5%, respectively. The proposed method was successfully applied to determine CLs, including MT, NME, DA, NE and E in human urine samples.
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Affiliation(s)
- Mohamed Bouri
- Department of Analytical Chemistry and Food Technology, University of Castilla-La Mancha, Av. Camilo José Cela 10, E-13004, Ciudad Real, Spain
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26
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Nguyen DT, Cho IS, Kim JW, Kim KR, Lee G, Paik MJ. Acidic metabolite profiling analysis of catecholamine and serotonin asO-ethoxycarbonyl/tert-butyldimethylsilyl derivatives by gas chromatography-mass spectrometry. Biomed Chromatogr 2012; 27:216-21. [DOI: 10.1002/bmc.2778] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Accepted: 05/17/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Duc-Toan Nguyen
- Department of Molecular Science and Technology; Ajou University; Suwon; 443-721; Republic of Korea
| | - In-Seon Cho
- College of Pharmacy; Sungkyunkwan University; Suwon; 440-746; Republic of Korea
| | - Jeong-Whun Kim
- Department of Otorhinolaryngology; Seoul National University Bundang Hospital; Seongnam; 463-707; Republic of Korea
| | - Kyoung-Rae Kim
- College of Pharmacy; Sungkyunkwan University; Suwon; 440-746; Republic of Korea
| | | | - Man-Jeong Paik
- College of Pharmacy; Sunchon National University; Suncheon; 540-950; Republic of Korea
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27
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Wu HW, Chen ML, Shou D, Zhu Y. Determination of catecholamines by ion chromatography coupled to acidic potassium permanganate chemiluminescence detection. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2012.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Brand T, Anderson GM. The Measurement of Platelet-Poor Plasma Serotonin:
A Systematic Review of Prior Reports and Recommendations for Improved Analysis. Clin Chem 2011; 57:1376-86. [DOI: 10.1373/clinchem.2011.163824] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND
Recent reports of new and important roles for serotonin (5-hydroxytryptamine, 5-HT) in the periphery have substantially increased interest in measuring peripheral serotonin. Nearly all circulating serotonin is found within platelets and this pool has been assessed by measuring serotonin in whole blood or in platelet-rich plasma. Measurement of the much smaller but potentially critically important pool of human free plasma serotonin in platelet-poor plasma (PPP) has proven much more difficult, with a wide range of reference values reported.
CONTENT
To characterize the available data we carried out a systematic literature search of previous reports of PPP serotonin and attempted to determine the best estimate of true PPP serotonin concentration in humans. A total of 101 published reports that included PPP serotonin values in healthy controls were found and included in the summary statistical analyses. The distribution of PPP serotonin values demonstrated high skewness (+1.98), and the reported values ranged from 0.6 to 179 nmol/L, with a mean of 31.6 nmol/L, an SD of 38.9 nmol/L, and a median of 14.8 nmol/L.
SUMMARY
Reported concentrations for human PPP or free plasma serotonin were highly discrepant, with most reports giving erroneously high values that should be disregarded. Inherent difficulties in selectively measuring the extremely low concentrations of serotonin present in PPP and in preparing PPP without contamination from platelet-derived serotonin contributed to the problem, as did the failure of researchers to compare their results with those from prior studies. There is a clear and pressing need for reference materials for the measurement of plasma (PPP) serotonin.
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Affiliation(s)
| | - George M Anderson
- Child Study Center and
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT
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29
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Sakaguchi Y, Yoshida H, Hayama T, Itoyama M, Todoroki K, Yamaguchi M, Nohta H. Selective liquid-chromatographic determination of native fluorescent biogenic amines in human urine based on fluorous derivatization. J Chromatogr A 2011; 1218:5581-6. [DOI: 10.1016/j.chroma.2011.05.076] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 05/18/2011] [Accepted: 05/21/2011] [Indexed: 11/25/2022]
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30
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Diao P, Yuan H, Huo F, Chen L, Xiao D, Paau MC, Choi MMF. A simple and sensitive CE method for the simultaneous determination of catecholamines in urine with in-column optical fiber light-emitting diode-induced fluorescence detection. Talanta 2011; 85:1279-84. [PMID: 21807183 DOI: 10.1016/j.talanta.2011.06.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/23/2011] [Accepted: 06/01/2011] [Indexed: 11/26/2022]
Abstract
A simple and sensitive method has been developed for simultaneous analysis of three catecholamines: dopamine (DA), epinephrine (EP) and norepinephrine (NE) in urine by capillary electrophoresis (CE) coupled with in-column fiber-optic light-emitting diode-induced fluorescence detection (ICFO-LED-IFD). Fluorescein isothiocyanate was used as the fluorescence tagged reagent for derivatization of DA, EP and NE. The CE conditions for separation of these catecholamines were systematically investigated. It was found that catecholamines could be more effectively separated by adding β-cyclodextin (β-CD) and acetonitrile (ACN) to a background electrolyte (BGE) of sodium borate. The migration times are 10.61, 10.83 and 11.14 min for DA, EP and NE, respectively and the catecholamines are completely separated within 11.5 min under the optimal condition of a BGE containing 10% v/v ACN, 20 mM β-CD and 20 mM sodium borate (pH 9.5), and an applied voltage of 13 kV. The relative standard deviations of migration time and peak area for these catecholamines are less than 0.16 and 2.0%, respectively. The limit of quantifications (LOQs) for DA, EP and NE are 3.5, 1.0 and 3.1 nM whereas the limit of detections (LODs) for DA, EP and NE are 1.0, 0.3 and 0.9 nM, respectively. Our proposed CE method provides low LOQ and LOD values. This CE-ICFO-LED-IFD methodology has been successfully applied to analyze catecholamines in human urine samples with good accuracy and satisfactory recovery.
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Affiliation(s)
- Peiyu Diao
- College of Chemistry, Sichuan University, Chengdu, PR China
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31
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Determination of catecholamines in urine using hydrophilic interaction chromatography with electrochemical detection. J Chromatogr A 2011; 1218:3854-61. [DOI: 10.1016/j.chroma.2011.04.034] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 04/07/2011] [Accepted: 04/11/2011] [Indexed: 11/24/2022]
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32
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Calderón Guzmán D, Bratoeff E, Ramírez López E, Hernández García E, Pierdant Rioja F, Osnaya Brizuela N, Trujillo Jiménez F, Barragán Mejía G, Juárez Olguín H, Santamaría Del Ángel D. Effect of flutamide and two novel synthetic steroids on GABA, glutamine and some oxidative stress markers in rat brain and prostate. Andrologia 2011; 43:225-32. [PMID: 21486400 DOI: 10.1111/j.1439-0272.2010.01051.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Flutamide is a steroid used to treat androgen-dependent disorders and as antiepileptic, but it induces a number of non-desirable side effects. This work was aimed at assaying the effect of flutamide and two novel synthetic steroids on the levels of GABA, glutamine and oxidative stress markers. Male Wistar rats (weight 180 g) received a single diazepam dose (5 mg/kg) 30 min prior to sacrifice (group A). Group B, flutamide; group C, 16β-methyl-17α-benzoyloxypregnen-4-en-3,20-dione; group D, estrone-3-hemisuccinate; group E, testosterone; group F, progesterone; all administered intraperitoneally at 10 mg/kg, daily for 3 days. Brain and prostate were obtained to assess lipid peroxidation (TBARS), Na(+) , K(+) ATPase activity, reduced glutathione (GSH), γ-amino butiric acid (GABA), glutamine and serotonin (5-HT) concentrations through spectrophotometry, fluorescence and HPLC. GABA levels increased and glutamine decreased in group A (P < 0.05). Total ATPase activity increased in group F and TBARS decreased in group B (P < 0.05). GSH decreased in A, B and C groups. 5-HT increased in group A and the prostate weight was increased in group E. The conclusion is that 16β-methyl-17α-benzoyloxypregnen-4-en-3,20-dione may be considered novel and promising to treat androgen-dependent diseases and epilepsy, since it showed an antioxidant effect and seemed to impair the GABAergic and serotonergic metabolism.
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Affiliation(s)
- D Calderón Guzmán
- Laboratorio de Neuroquímica, Instituto Nacional de Pediatría (INP), México
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Marc DT, Ailts JW, Campeau DCA, Bull MJ, Olson KL. Neurotransmitters excreted in the urine as biomarkers of nervous system activity: validity and clinical applicability. Neurosci Biobehav Rev 2011; 35:635-44. [PMID: 20696183 DOI: 10.1016/j.neubiorev.2010.07.007] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 07/21/2010] [Accepted: 07/30/2010] [Indexed: 02/06/2023]
Abstract
Strategies for managing the nervous system are numerous while methods of evaluating the nervous system are limited. Given the physiological importance of neurotransmitters as signaling molecules in the nervous system, the measurement of neurotransmitters has significant potential as a clinical tool. Of all the biological fluids that can be utilized, urinary neurotransmitter testing, due to its stability, sensitivity, and non-invasiveness, is the desired method to analyze nervous system function. Increasing use of this technology in a clinical setting demands a review of its feasibility, utility, and clinical value. We review the current body of literature pertaining to the mechanism of neurotransmitter transport across the blood-brain barrier as well as neurotransmitter filtration and excretion by the kidneys. In addition, this review summarizes the historical use of urinary neurotransmitter assessment to diagnose pheochromocytoma. Early research also correlated urinary assessment of neurotransmitters to various clinical symptoms and treatments of which we present research only for depression, ADHD, and inflammation because of the abundant amount of research in these areas. Finally, we review the limitations and challenges of urinary neurotransmitter testing. Taken together, evidence suggests that neurotransmitters excreted in the urine may have a place in clinical practice as a biomarker of nervous system function to effectively assess disturbances and monitor treatment efficacy.
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Affiliation(s)
- David T Marc
- NeuroScience, Inc. 373 280th Street, Osceola, WI 54020, USA.
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Wang S, Fan L, Zhou W. Sensitive Analysis of 5-(4,6-Dichloro-s-triazin-2-ylamino)fluorescein-Labeled Catecholamines by Mixed MEKC–LIF. Chromatographia 2010. [DOI: 10.1365/s10337-010-1796-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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35
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Kuklinski NJ, Berglund EC, Engelbreksson J, Ewing AG. Determination of salsolinol, norsalsolinol, and twenty-one biogenic amines using micellar electrokinetic capillary chromatography-electrochemical detection. Electrophoresis 2010; 31:1886-93. [PMID: 20446293 PMCID: PMC2892185 DOI: 10.1002/elps.200900761] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Micellar electrokinetic chromatography coupled to amperometric electrochemical detection was used to resolve and then quantify biogenic amines and metabolites within the fruit fly Drosophila melanogaster. A new separation scheme was devised to allow resolution of 24 compounds of interest. This was accomplished by precisely controlling the amount of base added to the background buffer, optimizing the resolution of the separation, and then calculating the pH. Here we focused on measurements of six of the analytes that are thought to be involved in the response to alcohol, dopamine, salsolinol, norsalsolinol, N-acetyloctopamine, octopamine, and N-acetyldopamine. These were identified and quantified within the fly head. We believe that the identification of salsolinol and norsalsolinol in the fly brain is novel.
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Affiliation(s)
- Nicholas J. Kuklinski
- Department of Chemistry, The Pennsylvania State University, 125 Chemistry Building, University Park, PA 16802, USA
- Department of Chemistry, University of Gothenburg, Kemivägen 10, SE-41296, Göteborg, Sweden
| | - E. Carina Berglund
- Department of Chemistry, University of Gothenburg, Kemivägen 10, SE-41296, Göteborg, Sweden
| | - Johan Engelbreksson
- Department of Chemistry, University of Gothenburg, Kemivägen 10, SE-41296, Göteborg, Sweden
| | - Andrew G. Ewing
- Department of Chemistry, The Pennsylvania State University, 125 Chemistry Building, University Park, PA 16802, USA
- Department of Chemistry, University of Gothenburg, Kemivägen 10, SE-41296, Göteborg, Sweden
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de Jong WH, de Vries EG, Wolffenbuttel BH, Kema I. Automated mass spectrometric analysis of urinary free catecholamines using on-line solid phase extraction. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1506-12. [DOI: 10.1016/j.jchromb.2010.03.050] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2009] [Revised: 03/19/2010] [Accepted: 03/31/2010] [Indexed: 11/27/2022]
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37
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Perati P, Cheng J, Jandik P, Hanko V. Disposable Carbon Electrodes for Liquid Chromatographic Detection of Catecholamines in Blood Plasma Samples. ELECTROANAL 2010. [DOI: 10.1002/elan.200900334] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Capillary zone electrophoresis hyphenated with laser-induced fluorescence detection for sensitive determination of noradrenaline and dopamine with 5-(4, 6-dichloro-s-triazin-2-ylamino) fluorescein as fluorescent label. Mikrochim Acta 2009. [DOI: 10.1007/s00604-009-0198-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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39
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Calderón Guzmán D, Osnaya Brizuela N, García Álvarez R, Hernández García E, Barragán Mejía G, Juárez Olguín H. Cerebrolysin and morphine decrease glutathione and 5-hydroxyindole acetic acid levels in fasted rat brain. Biomed Pharmacother 2009; 63:517-21. [DOI: 10.1016/j.biopha.2008.09.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2008] [Revised: 05/14/2008] [Accepted: 09/26/2008] [Indexed: 10/21/2022] Open
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40
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Interferences by anti-TB drugs in a validated HPLC assay for urinary catecholamines and their successful removal. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 873:124-8. [PMID: 18760975 DOI: 10.1016/j.jchromb.2008.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 08/11/2008] [Accepted: 08/11/2008] [Indexed: 11/23/2022]
Abstract
A validated high performance liquid chromatographic assay for urinary catecholamines is presented. After addition of 3,4-dihydroxybenzylamine as internal standard (IS) to urine, norepinephrine (NE), epinephrine (E), dopamine (DA) are extracted by ion exchange chromatography and eluted with boric acid. After paired ion separation, quantitation is by electrochemical (coulometric) detection after correction of internal standard recovery. Novel interferences by anti-TB drugs on norepinephrine assay are discussed. A simple method for their removal using alumina is presented.
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41
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RANHEIM B, HORSBERG TE, SØLI NE, RYENG KA, ARNEMO JM. The effects of medetomidine and its reversal with atipamezole on plasma glucose, cortisol and noradrenaline in cattle and sheep. J Vet Pharmacol Ther 2008. [DOI: 10.1111/j.1365-2885.2000.00291.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Chichinadze K, Chichinadze N. Stress-induced increase of testosterone: Contributions of social status and sympathetic reactivity. Physiol Behav 2008; 94:595-603. [DOI: 10.1016/j.physbeh.2008.03.020] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Revised: 03/25/2008] [Accepted: 03/27/2008] [Indexed: 01/01/2023]
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43
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Khuhawar MY, Zardari LA, Laghari AJ. Ethyl Chloroformate as a Derivatizing Reagent for Capillary GC Determination of Dopamine, Adrenaline, Putrescine, and Histamine. Chromatographia 2008. [DOI: 10.1365/s10337-008-0574-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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44
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Yoshitake M, Nohta H, Ogata S, Todoroki K, Yoshida H, Yoshitake T, Yamaguchi M. Liquid chromatography method for detecting native fluorescent bioamines in urine using post-column derivatization and intramolecular FRET detection. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 858:307-12. [PMID: 17851146 DOI: 10.1016/j.jchromb.2007.08.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2006] [Revised: 06/18/2007] [Accepted: 08/20/2007] [Indexed: 11/18/2022]
Abstract
Liquid chromatography (LC) with fluorescence detection is described for simultaneous determination of native fluorescent bioamines (indoleamines and catecholamines). This is based on intramolecular fluorescence resonance energy transfer (FRET) in an LC system following post-column derivatization of native fluorescent bioamines' amino groups with o-phthalaldehyde (OPA). OPA fluorescence was achieved through an intramolecular FRET process when the molecules were excited at maximum excitation wavelength of the native fluorescent bioamines. Bioamines separated by reversed-phase LC on ODS column were derivatized with OPA and 2-mercaptoethanol. This method provides sufficient selectivity and sensitivity for the determination of normetanephrine, dopamine, tyrosine, 5-hydroxytryptamine, tryptamine, and tryptophan in healthy human urine without prior sample purification.
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Affiliation(s)
- Makoto Yoshitake
- Faculty of Pharmaceutical Sciences, Fukuoka University, Nanakuma, Johnan, Fukuoka 814-0180, Japan
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Lee M, Oh SY, Pathak TS, Paeng IR, Cho BY, Paeng KJ. Selective solid-phase extraction of catecholamines by the chemically modified polymeric adsorbents with crown ether. J Chromatogr A 2007; 1160:340-4. [PMID: 17612551 DOI: 10.1016/j.chroma.2007.06.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 06/13/2007] [Accepted: 06/19/2007] [Indexed: 10/23/2022]
Abstract
A simple and selective one-step solid-phase extraction procedure using chemically modified polymer resin (Amberlite XAD-4) with crown ether was investigated for the measurement of urinary catecholamines. After loading the urine samples (adjusted to pH 4) on the synthesized adsorbent cartridge, the column was washed with methanol followed by water and then the adsorbed catecholamines were eluted by 1.0 mL of 6.0 M acetic acid. The effectiveness of sample clean-up method was demonstrated by reversed-phase ion-pair high-performance liquid chromatography with electrochemical detection. Under optimal condition, the recoveries of epinephrine, norepinephrine, and dopamine from spiked urine sample were >86% for all catecholamines. The detection limits (n=5) for epinephrine, norepinephrine, and dopamine were 37, 52, and 46 nmol/L, respectively.
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Affiliation(s)
- Myeongho Lee
- Department of Chemistry, Yonsei University, Wonju 220-710, South Korea
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46
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Zhou L, Wang S, Tian K, Dong Y, Hu Z. Simultaneous determination of catecholamines and amino acids by micellar electrokinetic chromatography with laser-induced fluorescence detection. J Sep Sci 2007; 30:110-7. [PMID: 17313149 DOI: 10.1002/jssc.200600219] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A selective and sensitive method was developed for separation and simultaneous determination of catecholamines and amino acids by MEKC with LIF. Interestingly enough, such work has been firstly performed on catecholamines derivatized with 4-chloro-7-nitro-2,1,3-benzoxadiazole and the detailed derivatization mechanism was discussed. After derivatization at 60 degrees C for 20 min, NBD-labeled catecholamines and amino acids were separated in a buffer system containing 10 mM sodium tetraborate-Na2HPO4, 20 mM SDS, and 10% v/v ACN at pH 9.75. SDS micelles were employed to improve the fluorescence intensity of catecholamine derivatives efficiently. Under optimum conditions, two catecholamines and 11 amino acids were separated in a short 13 min analysis time and the RSDs for migration time and peak area were less than 0.60 and 6.50%, respectively. The method was successfully applied for the quantification of catecholamines and amino acids in Portulaca oleracea L., human urine sample, and mixed injection sample.
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Affiliation(s)
- Lei Zhou
- Department of Chemistry, Lanzhou University, Lanzhou, P. R. China
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47
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Calderón Guzmán D, Trujillo Jiménez F, Hernández García E, Juárez Olguín H. Assessment of Antioxidant Effect of 2,5-Dihydroxybenzoic Acid and Vitamin A in Brains of Rats with Induced Hyperoxia. Neurochem Res 2007; 32:1036-40. [PMID: 17401673 DOI: 10.1007/s11064-006-9269-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2006] [Accepted: 12/20/2006] [Indexed: 11/27/2022]
Abstract
The aim of this study was to evaluate the effect of 2,5-dihydroxybenzoic acid, a salicylate derived from Acetyl salicylic acid (ASA) and vitamin A (vit A) on Na(+), K(+) ATPase enzyme and GSH levels in brain of rats exposed to hyperoxia (Hyp) as oxidant protocol. Rats were treated as follow: group I (control), group II (Hyp), group III (Hyp, ASA), group IV (vit A), group V (Hyp, vit A), group VI (Hyp, vit A, ASA). Vit A was given 5 days before and during Hyp, aspirin at the end of Hyp. Na(+),K(+) ATPase and total ATPase activity was significantly increased in group V. Levels of GSH showed a significant increase in group III, besides, levels of 2,5-dihydroxybenzoic acid as salicylate in plasma were significantly increased in group II. These results elucidate differences in the biochemical response of animal towards intake of various types of antioxidant substances, with increased GSH and salicylate in hyperoxia.
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48
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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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49
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Musso NR, Vergassola C, Pende A, Lotti G. HPLC with Electrochemical Detection of Catecholamines in Human Plasma. A Mini-Review. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483919008049235] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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50
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Weng Q, Xu G, Yuan K, Tang P. Determination of monoamines in urine by capillary electrophoresis with field-amplified sample stacking and amperometric detection. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 835:55-61. [PMID: 16569518 DOI: 10.1016/j.jchromb.2006.03.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2005] [Revised: 03/02/2006] [Accepted: 03/05/2006] [Indexed: 11/24/2022]
Abstract
A simple, rapid and low-cost method using capillary electrophoresis coupled with field-amplified sample stacking and electrochemical detection was developed for the separation and determination of monoamines. In this present work, a systematic study of the parameters (pH value and concentration of electrophoretic buffer, composition of sample solvent, injection voltage and time) affecting separation and on-line concentration of monoamines has been performed enabling the detection sensitivity of these monoamines to be improved by 5,000 times compared with the conventional electrokinetic injection. This developed method was applied to the direct analysis of these monoamines in human urine without off-line sample preconcentration. Due to the requirement for urine dilution to minimize the detrimental effects of high salt on analyte stacking, the real sensitivity improvement is about 50-fold when applying the optimized method to urine samples. In order to quantitate these monoamines accurately, internal standard calibration curves were constructed with standard monoamines in presence of salt with similar concentration as in human urine. In the method validation, the calibration curves were linear over a range of 1.0 x 10(-9) to 2.5 x 10(-8) mol/L for each monoamine and the limits of detection (signal to noise ratio of 3) for these monoamines were in the sub-nmol/L concentration range (6.0 x 10(-10) mol/L).
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Affiliation(s)
- Qianfeng Weng
- National Chromatographic R&A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China
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