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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
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 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
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
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
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
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
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
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
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
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 (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 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
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
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