sphingosine/إعياء

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Sphingosine 1-phosphate protects mouse extensor digitorum longus skeletal muscle during fatigue.

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Sphingomyelin derivatives exert various second messenger actions in numerous tissues. Sphingosine (SPH) and sphingosine 1-phosphate (S1P) are two major sphingomyelin derivatives present at high levels in blood. The aim of the present work was to investigate whether S1P and SPH exert relevant actions

Fatigue evaluation in fingolimod treated patients: An observational study.

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BACKGROUND Fatigue is one of the most disabling symptoms in Multiple Sclerosis (MS) patients and is associated with a low quality of life. Fingolimod (Fg), a sphingosine 1-phosphate receptor modulator, is the first oral MS disease modifying treatment. Little is known about its effect on fatigue. To

Effect of acute exercise on the content of free sphinganine and sphingosine in different skeletal muscle types of the rat.

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It has previously been shown that prolonged exercise of moderate intensity reduces the content of ceramide in each type of skeletal muscle. This was accompanied by a reduction in the activity of neutral, Mg++-dependent sphingomyelinase (the major enzyme responsible for ceramide formation from

Sphingosine 1-phosphate axis: a new leader actor in skeletal muscle biology.

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Sphingosine 1-phosphate (S1P) is a bioactive lipid involved in the regulation of biological processes such as proliferation, differentiation, motility, and survival. Here we review the role of S1P in the biology and homeostasis of skeletal muscle. S1P derives from the catabolism of sphingomyelin and

The role of sphingosine-1-phosphate in skeletal muscle: Physiology, mechanisms, and clinical perspectives.

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Sphingolipids were discovered more than a century ago and were simply considered as a class of cell membrane lipids for a long time. However, after the discovery of several intracellular functions and their role in the control of many physiological and pathophysiological conditions, these molecules

New insights into the role of sphingosine 1-phosphate and lysophosphatidic acid in the regulation of skeletal muscle cell biology.

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Lysophospholipids are bioactive molecules that are implicated in the control of fundamental biological processes such as proliferation, differentiation, survival and motility in different cell types. Here we review the role of sphingosine 1-phosphate (S1P) and lysophosphatidic acid (LPA) in the

Detection of Urine Metabolites in a Rat Model of Chronic Fatigue Syndrome before and after Exercise.

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Purpose. The aim of the present study was to elucidate the metabolic mechanisms associated with chronic fatigue syndrome (CFS) via an analysis of urine metabolites prior to and following exercise in a rat model. Methods. A rat model of CFS was established using restraint-stress, forced exercise, and

A Phase I Study of ABC294640, a First-in-Class Sphingosine Kinase-2 Inhibitor, in Patients with Advanced Solid Tumors.

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Purpose: Sphingosine kinases (SK1 and SK2) regulate tumor growth by generating the mitogenic and proinflammatory lipid sphingosine 1-phosphate (S1P). This phase I study investigated the safety, pharmacokinetics, pharmacodynamics, and antitumor activity of ABC294640, a first-in-class orally available

Results From the First-in-Human Study With Ozanimod, a Novel, Selective Sphingosine-1-Phosphate Receptor Modulator.

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The sphingosine-1-phosphate 1 receptor (S1P1R ) is expressed by lymphocytes, dendritic cells, and vascular endothelial cells and plays a role in the regulation of chronic inflammation and lymphocyte egress from peripheral lymphoid organs. Ozanimod is an oral selective modulator of S1P1R and S1P5R

A phase 2 study of the sphingosine-1-phosphate antibody sonepcizumab in patients with metastatic renal cell carcinoma.

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BACKGROUND Upregulation of sphingosine-1-phosphate (S1P) may mediate resistance to vascular endothelial growth factor (VEGF)-directed therapies and inhibit antitumor immunity. Antagonism of S1P in preclinical models appears to overcome this resistance. In this phase 2 study, the authors assessed the

Synthesis and biological activity of sphingosines with integrated azobenzene switches.

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A flexible synthetic approach towards biologically active sphingoid base-like compounds with an integrated azobenzene framework was achieved via installing a chiral amino-alcohol fragment into the azobenzene system by utilizing the Wittig olefination of substituted

Apoptosis and changes in contractile protein pattern in the skeletal muscle in heart failure.

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Chronic heart failure is characterized as a clinical disorder by exercise intolerance. There are two factors that are independently responsible for the reduced exercise capacity: (a) a shift from myosin heavy chain 1 (MHC1) to MHC2a and MHC2b and (b) muscle atrophy. We have demonstrated, both in

Overview and safety of fingolimod hydrochloride use in patients with multiple sclerosis.

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BACKGROUND Fingolimod (Gilenya®, FTY720) is an oral sphingosine-1-phosphate analogue that was approved by the FDA in 2010 for the treatment of relapsing forms of multiple sclerosis (MS). Fingolimod's mechanism of action is primarily related to lymphocyte sequestration in primary and secondary

S1P receptor antagonists fingolimod and siponimod do not improve the outcome of experimental autoimmune myasthenia gravis mice after disease onset.

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Myasthenia gravis (MG) is an autoimmune disease characterized by muscle weakness and fatigue in the presence of circulating antibodies against components of the neuromuscular junction. Most patients have a good prognosis, but some are refractory to standard-of-care immunosuppressive treatment and

Diaphragm dysfunction in heart failure is accompanied by increases in neutral sphingomyelinase activity and ceramide content.

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OBJECTIVE Chronic heart failure (CHF) causes inspiratory (diaphragm) muscle weakness and fatigue that contributes to dyspnoea and limited physical capacity in patients. However, the mechanisms that lead to diaphragm dysfunction in CHF remain poorly understood. Cytokines and angiotensin II are

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