ArticleJournal of exercise nutrition & biochemistry2019
Potential role of exercise-induced glucose-6-phosphate isomerase in skeletal muscle function.
Article in Journal of exercise nutrition & biochemistry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 6 citations in OpenAlex.
- Effects of exercise-induced beta-hydroxybutyrate on muscle function and cognitive function.Physiological reports · 2021Article
- Effects of exercise training on the biochemical pathways associated with sarcopenia.Physical activity and nutrition · 2020Article
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Authors and funding
8 authors at 2 institutions in 1 country.
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Abstract
purposeRecent studies have shown that glucose-6-phosphate isomerase (GPI)-which is a glycolysis interconversion enzyme-reduces oxidative stress. However, these studies are limited to tumors such as fibrosarcoma, and there are no studies that have examined the effects of exercise on GPI expression in mice skeletal muscle. Furthermore, GPI acts in an autocrine manner thorough its receptor, autocrine motility factor receptor (AMFR); therefore, we investigated expression level changes of secreted GPI from skeletal muscle in in vitro study to examine the potential role of GPI on skeletal muscle.
methodsFirst, we performed an in vitro study, to identify the condition that upregulates GPI levels in skeletal muscle cells; we treated C2C12 muscle cells with an exercise-mimicking chemical, AICAR. AICAR treatment upregulated GPI expression level in C2C12 cell and its secretomes. To confirm the direct effect of GPI on skeletal muscle cells, we treated C2C12 cells with GPI recombinant protein.
resultsWe found that GPI improved the viability of C2C12 cells. In the in vivo study, the exercise-treated mice group showed upregulated GPI expression in skeletal muscle. Based on the in vitro study results, we speculated that expression level of GPI in skeletal muscle might be associated with muscle function. We analyzed the association between GPI expression level and the grip strength of the all mice group. The mice group's grip strengths were upregulated after 2 weeks of treadmill exercise, and GPI expression level positively correlated with the grip strength.
conclusionThese results suggested that the exercise-induced GPI expression in skeletal muscle might have a positive effect on skeletal muscle function.
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