Results 21 to 30 of about 13,827,580 (161)

CSF Monoamine Metabolites and Cognitive Trajectory in Early Parkinson's Disease. [PDF]

Ann Clin Transl Neurol
ABSTRACT Background Imaging and postmortem studies indicate that abnormalities in monoaminergic neurotransmission contribute to cognitive impairment in Parkinson's disease (PD). However, it remains uncertain if cerebrospinal fluid (CSF) monoamine metabolites can serve as biomarkers of cognitive decline in early PD.
Shao JY, Li R, Jiao YX, Ma K, Yang HQ, Sun ZY, Zhang JW, Chen S.   +7 more
europepmc   +2 more sources

Dietary flavonols contribute to false-positive elevation of homovanillic acid, a marker of catecholamine-secreting tumours [PDF]

, 2011
Background: Urinary homovanillic acid (HVA) measurement is used routinely as a marker of the first test for the screening of catecholamine-secreting tumors and dopamine metabolism, but generates a large number of false-positive results.
Crozier, A., Davidson, D.F., Michael E.J. Lean, Alan Crozier, Lean, M.E.J., Boyle, James, Combet, E., James G. Boyle, Emilie Combet, D. Fraser Davidson   +9 more
core   +1 more source

Plasma 5-hydroxyindoleacetic acid as an endogenous index of renal plasma flow [PDF]

, 1989
Plasma 5-hydroxyindoleacetic acid as an endogenous index of renal plasma flow. 5-Hydroxyindoleacetic acid (5-HIAA), the major serotonin metabolite, was measured in human plasma and urine using liquid chromatography and electrochemical detection.
Elghozi, Jean-Luc, Grünfeld, Jean-Pierre, Hannedouche, Thierry, Thierry Hannedouche, Jean-Luc Elghozi, Laude, Dominique, Dominique Laude, Jean-Pierre Grünfeld, Déchaux, Michèle, Michèle Déchaux   +9 more
core   +1 more source

Simultaneous measurement of serotonin and 5-hydroxyindoleacetic acid in rat brain using a liquid chromatographic method with electrochemical detection

, 1991
A simple and sensitive method for the simultaneous measurement of 5-hydroxytryptamine and its main metabolite 5-hydroxyindoleacetic acid in rat brain is described.
Odink, J., Vries, M. de
core   +2 more sources

Measurement of urinary 5-HIAA: correlation between spot versus 24-h urine collection

Endocrine Connections, 2019
Background: The 24-h urinary output of 5-hydroxyindoleacetic acid (5-HIAA) is used to monitor disease progression and treatment responses of neuroendocrine neoplasms (NENs).
Matilde Calanchini, Michael Tadman, Jesper Krogh, Andrea Fabbri, Ashley Grossman, Brian Shine   +5 more
doaj   +1 more source

Impact of Long-Rope Jumping on Monoamine and Attention in Young Adults

Brain Sciences, 2021
Previous research has shown that rope jumping improves physical health; however, little is known about its impact on brain-derived monoamine neurotransmitters associated with cognitive regulation.
Masatoshi Yamashita, Takanobu Yamamoto
doaj   +1 more source

Concentrations of Homovanillic Acid and 5-Hydroxyindoleacetic Acid in Cerebrospinal Fluid from Human Infants in the Perinatal Period [PDF]

, 1984
To assess maturation of central serotonin and catecholamine pathways at birth, we measured lumbar CSF homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA), stable acid metabolites of dopamine and serotonin, using HPLC with electrochemical ...
Silverstein, Faye Sarah, Buchanan, Karen, Donn, Steven M., Johnston, Michael V.   +3 more
core   +1 more source

Regulatory Pathways of Monoamine Oxidase A during Social Stress

Frontiers in Neuroscience, 2017
Social stress has a high impact on many biological systems in the brain, including serotonergic (5-HT) system—a major drug target in the current treatment for depression. Hyperactivity of hypothalamic-pituitary-adrenal (HPA) axis and monoamine oxidase A (
Yuki Higuchi, Tomoko Soga, Ishwar S. Parhar   +2 more
doaj   +1 more source

Assessment of Serotonin Metabolite 5-hydroxyindoleacetic Acid Levels in Urine Sample for Diagnosis and Treatment Efficacy in Children with Dysfunctional Voiding and Their Interaction with Biofeedback Therapy

Journal of Urological Surgery, 2018
Objective:Dysfunctional voiding (DV), which is explained as an incoordination between the external urethral sphincter and the bladder, is a situation developing in neurologically normal children.
Bahadır Topuz, Giray Ergin, Burak Köprü, Turgay Ebiloğlu, Hasan Cem Irkılata, Yusuf Kibar, Musa Murat Dayanç   +6 more
doaj   +1 more source

Serum and plasma 5-hydroxyindoleacetic acid as an alternative to 24-h urine 5-hydroxyindoleacetic acid measurement

, 2015
BACKGROUND: Neuroendocrine tumours are slow growing tumours known to secrete a variety of vasoactive peptides which give rise to symptoms of the carcinoid syndrome.
Trainer, P J, Adaway, J E, Monaghan, P J, Valle, J W, Dobson, R, Walsh, J, Keevil, B G, Cuthbertson, D J   +7 more
core   +1 more source