1. Does a Hypertrophying Muscle Fibre Reprogramme its Metabolism Similar to a Cancer Cell?
- Author
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Wackerhage, Henning, Vechetti, Ivan J., Baumert, Philipp, Gehlert, Sebastian, Becker, Lore, Jaspers, Richard T., and de Angelis, Martin Hrabě
- Subjects
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SKELETAL muscle physiology , *GLUCOSE metabolism , *ENERGY metabolism , *PROTEINS , *MUSCLES , *PHOSPHOTRANSFERASES , *MUSCULAR hypertrophy , *BLOOD sugar , *HYDROLASES , *LACTATES , *TUMORS , *AMINO acids , *GLYCOLYSIS , *METABOLITES , *ADIPOSE tissues - Abstract
In 1924, Otto Warburg asked "How does the metabolism of a growing tissue differ from that of a non-growing tissue?" Currently, we know that proliferating healthy and cancer cells reprogramme their metabolism. This typically includes increased glucose uptake, glycolytic flux and lactate synthesis. A key function of this reprogramming is to channel glycolytic intermediates and other metabolites into anabolic reactions such as nucleotide-RNA/DNA synthesis, amino acid-protein synthesis and the synthesis of, for example, acetyl and methyl groups for epigenetic modification. In this review, we discuss evidence that a hypertrophying muscle similarly takes up more glucose and reprogrammes its metabolism to channel energy metabolites into anabolic pathways. We specifically discuss the functions of the cancer-associated enzymes phosphoglycerate dehydrogenase and pyruvate kinase muscle 2 in skeletal muscle. In addition, we ask whether increased glucose uptake by a hypertrophying muscle explains why muscularity is often negatively associated with type 2 diabetes mellitus and obesity. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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