ArticleInflammation and regeneration2025
Critical roles of IL-6 signaling in myoblast differentiation of human adipose-derived mesenchymal stem cells.
Article in Inflammation and regeneration, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Dual Roles of Adipose Tissue in Skeletal Muscle Regeneration: Pro-Regenerative Versus Maladaptive.Journal of cachexia, sarcopenia and muscle · 2026Review
- Pivotal contribution of super-enhancer-driven KLF6 expression to the adipogenesis of human adipose-derived stem cells.Inflammation and regeneration · 2026Article
- A novel proliferation synergy factor cocktail maintains proliferation and improves transfection efficiency in muscle cells and fibroblasts under low-serum conditions.Frontiers in cell and developmental biology · 2025Article
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10 authors.
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Abstract
backgroundEctopic fat is also formed in muscles as well as the liver, where adipose-derived mesenchymal stem cells (ADSCs) promote adipogenesis. On the other hand, after muscle injury, muscle satellite cells (SCs) contribute to muscle repair through myodifferentiation. Human ADSCs are multipotent stem cells, but it remains unclear whether they are involved in myoblast differentiation. The aim is to find a novel myogenic cytokine and its signaling pathway that promotes the differentiation of human ADSCs-a potential source of new muscle precursor cells-into myoblasts.
methodsAn array kit was used to detect cytokines produced by ADSCs. After treating ADSCs with the DNA methyltransferase inhibitor 5-Aza-2'-deoxycytidine (5-aza-C) and different JAK inhibitors, MyHC1, a myodifferentiation marker, was detected by immunofluorescence staining and reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The expression status of signaling molecules was determined by Western blotting and the recruitment of transcription factors to the MYOG promoter by chromatin immunoprecipitation (ChIP).
resultsIL-6 was detected at high concentrations in the culture supernatant of ADSCs. ADSCs stimulated with 5-aza-C became strongly positive for MyHC1 on day 21 post-stimulation. When co-stimulated with 5-aza-C and IL-6/sIL-6R, ADSCs became positive for MyHC1 protein and upregulated MYOG mRNA as early as day 14 post-stimulation. Co-stimulation with 5-aza-C and IL-6/sIL-6R resulted in phosphorylation of STAT1 and STAT3. The addition of a JAK2 inhibitor, but not JAK1/3 inhibitors, abolished the MyHC1 positivity and phosphorylation of STAT1 and STAT3. Co-stimulation with 5-aza-C and IL-6/sIL-6R during the myogenesis process resulted in the recruitment of STAT1, but not STAT3, to the MYOG promoter. Myoblast differentiation induced by stimulation with 5-aza-C was enhanced by activation of the IL-6/JAK2/STAT1/MYOG pathway.
conclusionsTherefore, sustained IL-6/JAK2/STAT1 activation may serve as an important driver of human ADSC differentiation into myoblast, suggesting an important candidate signaling pathway for ameliorating muscle atrophy.
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