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Dernière publication 01/01/2021

Glycogen Synthase Kinase-3beta Inhibitor Lithium Chloride Protects Against Infla

Inflammation-mediated skeletal muscle wasting is induced by inflammatory cytokines. It occurs in critically ill patients with sepsis (termed...

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    [title] => Glycogen Synthase Kinase-3beta Inhibitor Lithium Chloride Protects Against Infla
    [paragraph] => Glycogen Synthase Kinase-3beta Inhibitor Lithium Chloride Protects Against Inflammation-Mediated Skeletal Muscle Wasting
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Authors
JH Lee, SW Kim, JH Kim et al

 Lab
Gwangju Institute of Science and Technology, Republic of Korea
Journal
Research Square
Abstract
Inflammation-mediated skeletal muscle wasting is induced by inflammatory cytokines. It occurs in critically ill patients with sepsis (termed intensive care unit acquired weakness) and patients with advanced metastasis (termed cancer cachexia). Both conditions severely impact on patient morbidity and mortality. Lithium chloride has been investigated as a drug repurposing candidate for numerous diseases. In this study, we assessed whether lithium chloride affects inflammation-mediated muscle wasting, using in vitro and in vivo models of cancer cachexia and sepsis. Lithium chloride prevented wasting in myotubes cultured with cancer cell conditioned media, maintained expression of the muscle fiber contractile protein, myosin heavy chain 2 and blocked upregulation of the E3 ubiquitin ligase, Atrogin-1. Glycogen synthase kinase-3beta inhibition was indicated as the target mechanism, due to the following observations: 1) beta-catenin was upregulated in the myotubes and 2) inhibition of IMPA1, the secondary biological target of lithium chloride, did not inhibit the effects of cancer conditioned media. Lithium chloride inhibited upregulation of the inflammation-associated cytokines Il-1beta, Il-6 and inos in macrophages treated with lipopolysaccharide. Lithium chloride treatment in an animal model of sepsis improved body weight, increased muscle mass, preserved the survival of larger fibers and decreased expression of the wasting effector genes, Atrogin-1 and Murf-1. In a model of cancer cachexia, lithium chloride increased muscle mass, enhanced muscle strength and increased fiber cross sectional area, with no significant effect on tumorigenesis. These results indicate that lithium chloride could be repurposed as a drug to treat patients with inflammation-mediated skeletal muscle wasting.
BIOSEB Instruments Used
Grip strength test (BIO-GS3)
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Une méthode simple pour quantifier objectivement la force musculaire des rats et souris et l'effet de drogues, toxines, maladies musculaires (ex: myopathie) et neurodégénératives. Cette mesure de force est souvent employée en association avec le test de coordination motrice ROTAROD: un sujet présentant une coordination normale montrera des résultats médiocres en cas de faible force musculaire. Un must pour vos recherches sur l'activité, la coordination et le contrôle musculaire: particulièrement utile pour vos études sur les maladies de Parkinson et Huntington.
Nouveautés GS4 - 2023: Écran couleur rétroéclairé (meilleure lisibilité), pédale de remise à zéro, durée de batterie optimisée, taille de mémoire augmentée à 500 valeurs, compteur d'animaux, port USB (transfert de données/charge)

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