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Kiyoon Kang et al.
Journal of pineal research, 49(2), 176-182 (2010-07-01)
Serotonin N-acetyltransferase (SNA), a rate-limiting enzyme in melatonin biosynthesis in vertebrates, is responsible for the production of N-acetylserotonin; this molecule is then converted to melatonin by hydroxyindole-O-methyltransferase. We generated transgenic rice plants via expression of the human SNA gene under
Jimo Borjigin et al.
Molecular and cellular endocrinology, 349(1), 13-19 (2011-07-26)
The pineal gland is a neuroendocrine organ of the brain. Its main task is to synthesize and secrete melatonin, a nocturnal hormone with diverse physiological functions. This review will focus on the central and pineal mechanisms in generation of mammalian
Dae Young Yoo et al.
The Journal of veterinary medical science, 73(11), 1411-1416 (2011-06-30)
In this study, we investigated the effects of N-acetylserotonin (NAS) on cell proliferation and neuroblast differentiation in the mouse dentate gyrus using anti-Ki67 and anti-doublecortin (DCX) antibodies. Ki67 is expressed in the nucleus or on the surface of chromosomes during
KLF15 regulates dopamine D2 receptor and participates in mouse models of neuropathic pain.
Junfei Z, et al.
Biochemical and Biophysical Research Communications, 492(2), 269-274 (2017)
Igor Semak et al.
Journal of pineal research, 45(4), 515-523 (2008-08-23)
In the present study we provide direct evidence for the involvement of rat microsomal cytochrome P450s in melatonin O-demethylation and hydroxylation at two different positions: 2 and 6, as well as generation of N(1)-acetyl-N(2)-formyl-5-methoxy-kynuramine (AFMK) and two unknown products. Moreover
J K Yao et al.
Molecular psychiatry, 15(9), 938-953 (2009-04-30)
Schizophrenia is characterized by complex and dynamically interacting perturbations in multiple neurochemical systems. In the past, evidence for these alterations has been collected piecemeal, limiting our understanding of the interactions among relevant biological systems. Earlier, both hyper- and hyposerotonemia were
C S Pang et al.
Biological signals, 4(6), 311-324 (1995-11-01)
We have compared the pharmacological characteristics of 2-[125I]iodomelatonin binding to crude membrane preparations of the lung, spleen, brain and kidney of chicken. Saturation studies indicated significant differences (p < 0.05) in the equilibrium dissociation constant (Kd) and maximum number of
Tongyu Rui et al.
Neurochemistry international, 132, 104606-104606 (2019-11-25)
Tropomyosin-related kinase B (TrkB) has emerged as a key mediator in the pathophysiology of traumatic brain injury (TBI). However, it is not known whether TrkB's agonist N-acetyl serotonin (NAS) involves in neuronal damage and brain dysfunction caused by TBI that
Lingman Ma et al.
Platelets, 26(4), 342-348 (2014-05-17)
I4 is a new synthetic anti-diabetes sulfonylurea compound. The aim of present study was to investigate the preventive effects and primary action mechanisms of I4 on platelet-mediated arterial thrombosis. Platelet aggregation and 5-hydroxytryptamine (5-HT) secretion ex vivo was detected. The
N-Acetylserotonin and 6-hydroxymelatonin against oxidative stress: Implications for the overall protection exerted by melatonin
A?lvarez DR, et al.
The Journal of Physical Chemistry B, 119(27), 8535-8543 (2015)
Mariana Gavazza et al.
Molecular and cellular biochemistry, 321(1-2), 37-43 (2008-09-02)
In this study, we examined the relative efficacies of alpha-tocopherol, N-acetyl-serotonin, and melatonin in reducing ascorbate-Fe(2+) lipid peroxidation (LPO) of rat testicular microsomes and mitochondria. Special attention was paid to the changes produced on the highly polyunsaturated fatty acids (PUFAs)
N-acetyl-serotonin (normelatonin) and melatonin protect neurons against oxidative challenges and suppress the activity of the transcription factor NF-kappaB
Lezoualch F, et al.
Journal of Pineal Research, 24(3), 168-178 (1998)
Chaoyang Ma et al.
Journal of pharmaceutical and biomedical analysis, 105, 84-90 (2014-12-30)
An ultra-performance liquid chromatography-quadrupole time-of-flight-based metabolomic approach was developed to study influence of salidroside, an anti-fatigue ingredient from Rhoiola rosea, on urinary metabolic profiling of rats to a single dose of 180 mg/kg per day. Unsupervised principal component analysis (PCA)
Eliângela Lima et al.
Epilepsy & behavior : E&B, 20(4), 607-612 (2011-04-02)
The goal of this study was to verify the effects of treatment with melatonin and N-acetylserotonin on the pilocarpine-induced epilepsy model. The animals were divided into four groups: (1) animals treated with saline (Saline); (2) animals that received pilocarpine and
Roseli Barbosa et al.
Life sciences, 82(9-10), 529-535 (2008-01-29)
Calcium is an important second messenger in the rat pineal gland, as well as cAMP. They both contribute to melatonin synthesis mediated by the three main enzymes of the melatonin synthesis pathway: tryptophan hydroxylase, arylalkylamine N-acetyltransferase and hydroxyindole-O-methyltransferase. The cytosolic
Xiangge Tian et al.
Biochemical pharmacology, 94(4), 282-296 (2015-03-05)
Exogenous melatonin (Mel) is widely used in clinic for multiple therapeutic purposes. In metabolism pathways of Mel, 6-hydroxymelatonin-sulfate (S-O-Mel) and N-acetylserotonin sulfate (S-NAS) are the most abundant metabolites account for over 90% of total Mel metabolites in humans, indicating that
Masahiro Matsuo et al.
FEBS letters, 587(9), 1392-1398 (2013-03-26)
The 24-h rhythmic production of melatonin by the pineal gland is essential for coordinating circadian physiology. Melatonin production increases at night in response to the release of norepinephrine from sympathetic nerve processes which innervate the pineal gland. This signal is
Izabela Sadowska-Woda et al.
Toxicology in vitro : an international journal published in association with BIBRA, 24(3), 879-884 (2009-12-08)
beta-Cyfluthrin is one of the most widely used type II pyrethroid in agriculture. The aim of this study was to examine (1) the possibility of beta-cyfluthrin to induce oxidative stress in human erythrocytes in vitro and its effect on catalase
Melissa D Carter et al.
Journal of mass spectrometry : JMS, 47(3), 277-285 (2012-03-21)
Melatonin (MEL) and its chemical precursor N-acetylserotonin (NAS) are believed to be potential biomarkers for sleep-related disorders. Measurement of these compounds, however, has proven to be difficult due to their low circulating levels, especially that of NAS. Few methods offer
Pradoldej Sompol et al.
Proceedings of the National Academy of Sciences of the United States of America, 108(21), 8844-8849 (2011-05-11)
N-acetylserotonin (NAS), the immediate precursor of melatonin, the pineal gland indole, is regulated in a circadian rhythm. NAS swiftly activates TrkB in a circadian manner and exhibits antidepressant effect in a TrkB-dependent manner. Here we show that NAS regulates an
B B P Gupta et al.
Indian journal of experimental biology, 48(8), 786-792 (2011-02-24)
Arylalkylamine N-acetyltransferase (AA-NAT) is the rate-limiting enzyme of melatonin biosynthetic pathway. In vitro effects of 5-hydroxytryptophan (5-HTP) and indoleamines (serotonin, N-acetylserotonin and melatonin) were studied on AA-NAT activity in the pineal organ of the fish, C. gariepinus during different phases
Qingzhi Li et al.
Journal of molecular neuroscience : MN, 67(4), 574-588 (2019-01-27)
In this study, with primary mouse neural progenitor cells (NPCs), we investigated the neuroprotective effect of a tropomyosin-related kinase receptor B (TrkB) agonist, N-acetyl serotonin (NAS), against hydrogen peroxide (H2O2)-induced toxicity. We found that pre-incubation with NAS not only ameliorates
Ye Li et al.
Journal of biological rhythms, 30(6), 519-532 (2015-10-09)
The chicken pineal gland synthesizes and releases melatonin rhythmically in light/dark (LD) cycles, with high melatonin levels during the dark phase, and in constant darkness (DD) for several cycles before it gradually damps to arrhythmicity in DD. Daily administration of
Sung-Wuk Jang et al.
Proceedings of the National Academy of Sciences of the United States of America, 107(8), 3876-3881 (2010-02-06)
Brain-derived neurotrophic factor (BDNF) is a cognate ligand for the TrkB receptor. BDNF and serotonin often function in a cooperative manner to regulate neuronal plasticity, neurogenesis, and neuronal survival. Here we show that NAS (N-acetylserotonin) swiftly activates TrkB in a
Michał A Zmijewski et al.
Molecular and cellular endocrinology, 307(1-2), 211-216 (2009-05-05)
Since melatonin production has been documented in extrapineal and extraneuronal tissues, we investigated the expression of molecular elements of the melatoninergic system in human RPE cells (ARPE-19). The expression of key enzymes for melatonin synthesis: tryptophan hydroxylases (TPH1 and TPH2);
Natalia Fagali et al.
Biochemical and biophysical research communications, 423(4), 873-877 (2012-06-21)
There is no general agreement yet on the antioxidant effect of pineal indoles against lipid peroxidation. Accordingly, the main goal of the present work was to study the antioxidant activity of melatonin (MLT), N-acetylserotonin (NAS), 5-HO-tryptophan (5HO-TRP) and 5-methoxytryptamine (5MTP)
Hitoshi Aonuma et al.
PloS one, 7(8), e43377-e43377 (2012-08-21)
We examined changes in the content of biogenic amines in the brains of ant queen associated with early colony establishment. In ants, including Formica japonica, winged virgin queens lose their wings following copulation, and then start establishing a colony. Significant
Gianluca Tosini et al.
The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry, 18(6), 645-653 (2012-05-16)
N-Acetylserotonin (NAS) is a naturally occurring chemical intermediate in biosynthesis of melatonin. Previous studies have shown that NAS has different brain distribution patterns from those of serotonin and melatonin, suggesting that NAS might have functions other than as a precursor
Daniel Todd et al.
PloS one, 9(2), e87923-e87923 (2014-02-08)
Huntington's disease (HD) is a devastating, genetic neurodegenerative disease caused by a tri-nucleotide expansion in exon 1 of the huntingtin gene. HD is clinically characterized by chorea, emotional and psychiatric disturbances and cognitive deficits with later symptoms including rigidity and
G F Oxenkrug et al.
Annals of the New York Academy of Sciences, 1122, 245-252 (2007-12-14)
The ability of methylene blue (MB) to inhibit the nitric oxide-induced stimulation of N-methyl-D-aspartate receptors has been suggested as a possible mechanism of MB's clinical antidepressant action. This study evaluated the alternative/additional mechanisms of the antidepressant effect of MB on
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