5 hydroxytryptamine/epuizare

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High incidence of antibodies to 5-hydroxytryptamine, gangliosides and phospholipids in patients with chronic fatigue and fibromyalgia syndrome and their relatives: evidence for a clinical entity of both disorders.

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The fibromyalgia syndrome (FMS) is one of the most frequent rheumatic disorders showing a wide spectrum of different symptoms. An association with the chronic fatigue syndrome (CFS) has been discussed. Recently, a defined autoantibody pattern consisting of antibodies to serotonin

Possible upregulation of hypothalamic 5-hydroxytryptamine receptors in patients with postviral fatigue syndrome.

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OBJECTIVE To study the dynamic function of hypothalamic 5-hydroxytryptamine receptors in patients with postviral fatigue syndrome. METHODS Prospective comparison of patients with postviral fatigue syndrome with two control groups. METHODS Department of neurology, University of Glasgow, Southern

The variation of the 5-hydroxytryptamine system between chronic unpredictable mild stress rats and chronic fatigue syndrome rats induced by forced treadmill running.

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The aim of this study was to observe the variation in the 5-hydroxytryptamine (5-HT) system between a chronic unpredictable mild stress (CUMS) model and a chronic fatigue syndrome (CFS) model. The total distance, the crossing pieces, and rearing times in the open-field test of the CUMS group and the

[Synthesis reduction of central neurotransmitter 5-hydroxytryptamine by branched chain amino acid and associated antagonists improves postoperative fatigue syndrome].

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OBJECTIVE To observe the change of postoperative fatigue in rats after the effect of branched chain amino acid(BCAA) and associated antagonists on central neurotransmitter 5-HT metabolic pathway, and to investigate the role of 5-HT in the development of postoperative fatigue

[Effects of fatigue and restraint stress on the expression of carnitine palmitoyltransferase-I and 5-hydroxytryptamine receptors in aorta of rats].

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OBJECTIVE To investigate the effect of fatigue and restraint stress on the expressions of CPT (carnitine palmitoyltransferase)-I, PPAR (peroxisome proliferator-activated receptor) δ, 5-HT (hydroxytryptamine) 1D and 5-HT2A receptors in aorta of rats. METHODS A total of 45 healthy male Wistar rats

Evidence for a possible role of 5-hydroxytryptamine in the genesis of fatigue in man: administration of paroxetine, a 5-HT re-uptake inhibitor, reduces the capacity to perform prolonged exercise.

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Seven healthy subjects exercised to exhaustion on a bicycle ergometer at a power output corresponding to 70% of maximum oxygen uptake after administration of either a placebo or 20 mg of paroxetine, a serotonin re-uptake inhibitor. Exercise time after paroxetine (median 94 min; range 84-127 min) was

Analysis of the anti-fatigue activity of polysaccharides from Spirulina platensis: role of central 5-hydroxytryptamine mechanisms.

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This study evaluated the effects of polysaccharides from Spirulina platensis (PSP) on endurance during treadmill exercise; levels of some biochemical indicators including hemoglobin (Hb), lactic acid (LA), creatine kinase (CK), and blood urea nitrogen (BUN); concentrations of 5-hydroxytryptamine

Tryptophan, 5-hydroxytryptamine and a possible explanation for central fatigue.

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In prolonged exercise the plasma level of branched-chain amino acids (BCAA) may fall and that of fatty acid increases: the latter increases the free tryptophan level, so that the plasma concentration ratio, free tryptophan/BCAA may increase leading to higher levels of tryptophan and therefore of

IFN-gamma mediated pathways in patients with fatigue and chronic active Epstein Barr virus-infection.

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BACKGROUND Chronic active Epstein Barr virus (EBV)-infection is characterized by mononucleosis like symptoms including fatigue, lymphadenopathy and/or hepatosplenomegaly and serologic evidence for ongoing EBV replication. Interferon-gamma (IFN-gamma) triggers several antiviral mechanisms in target

Effects of Paeonia radix on 5-hydroxytryptamine synthesis and tryptophan hydroxylase expression in the dorsal raphe of exercised rats.

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Paeonia radix is the root of Paeonia japonica MIYABE, a perennial plant classified in the family Paeoniaceae. In the present study, the effects of Paeonia radix on performance in treadmill exercise, and 5-hydroxytryptamine (5-HT) synthesis and tryptophan hydroxylase (TPH) expression in the dorsal

Serotonin regulation in a rat model of exercise-induced chronic fatigue.

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This study investigated the mechanisms underlying regulation of the serotonin system in the rat brain during exercise-induced chronic fatigue. High-performance liquid chromatography-mass spectrometry (HPLC-MS) was performed to measure serum tryptophan of the fatigued rat. HPLC was conducted to

Tryptophan and kynurenic Acid may produce an amplified effect in central fatigue induced by chronic sleep disorder.

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Tryptophan (TRP) and its neuroactive metabolite, kynurenic acid (KYNA), are thought to play key roles in central fatigue, but the specifics are still unknown. To clarify their roles in the brain, we developed a rat model of central fatigue induced by chronic sleep disorder (CFSD) by disturbing the

The effect of tryptophan deficiency in the brain on rat fatigue levels: a rat model of fatigue reduction.

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The level of tryptophan and 5-hydroxyindoleacetic acid were measured in the brain (striatum) of rats on tryptophan-deficient diet and tryptophan-enriched diet. We measured concentrations of tryptophan and 5-hydroxyindoleacetic acid in striatum by using microdialysis and HPLC methods. The

Central anti-fatigue activity of verbascoside.

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In this study, the effects of verbascoside on treadmill exercise endurance, 5-hydroxytryptamine (5-HT) concentrations, the second isoforms of tryptophan hydroxylase (TPH2) and serotonergic type 1B inhibitory autoreceptors (5-HT1B) protein expression in the caudate putamen of exercised rats were

Brain neurotransmitters in fatigue and overtraining.

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Since the publication of the serotonin hypothesis, numerous theories involving the accumulation or depletion of different substances in the brain have been proposed to explain central fatigue. Although the theoretical rationale for the "serotonin-fatigue hypothesis" is clear, several seemingly

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