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• W2092485542 endingPage "10344" @default.
• W2092485542 startingPage "10330" @default.
• W2092485542 abstract "Mesenchymal stem cells (MSCs) are pluripotent cells that can differentiate into multilineage cell types, including adipocytes and osteoblasts. Mechanical stimulus is one of the crucial factors in regulating MSC differentiation. However, it remains unknown how mechanical stimulus affects the balance between adipogenesis and osteogenesis. Low intensity pulsed ultrasound (LIPUS) therapy is a clinical application of mechanical stimulus and facilitates bone fracture healing. Here, we applied LIPUS to adipogenic progenitor cell and MSC lines to analyze how multilineage cell differentiation was affected. We found that LIPUS suppressed adipogenic differentiation of both cell types, represented by impaired lipid droplet appearance and decreased gene expression of peroxisome proliferator-activated receptor γ2 (Pparg2) and fatty acid-binding protein 4 (Fabp4). LIPUS also down-regulated the phosphorylation level of peroxisome proliferator-activated receptor γ2 protein, inhibiting its transcriptional activity. In contrast, LIPUS promoted osteogenic differentiation of the MSC line, characterized by increased cell calcification as well as inductions of runt-related transcription factor 2 (Runx2) and Osteocalcin mRNAs. LIPUS induced phosphorylation of cancer Osaka thyroid oncogene/tumor progression locus 2 (Cot/Tpl2) kinase, which was essential for the phosphorylation of mitogen-activated kinase kinase 1 (MEK1) and p44/p42 extracellular signal-regulated kinases (ERKs). Notably, effects of LIPUS on both adipogenesis and osteogenesis were prevented by a Cot/Tpl2-specific inhibitor. Furthermore, effects of LIPUS on MSC differentiation as well as Cot/Tpl2 phosphorylation were attenuated by the inhibition of Rho-associated kinase. Taken together, these results indicate that mechanical stimulus with LIPUS suppresses adipogenesis and promotes osteogenesis of MSCs through Rho-associated kinase-Cot/Tpl2-MEK-ERK signaling pathway." @default.
• W2092485542 created "2016-06-24" @default.
• W2092485542 creator A5000577384 @default.
• W2092485542 creator A5053249745 @default.
• W2092485542 creator A5061158540 @default.
• W2092485542 creator A5066542297 @default.
• W2092485542 creator A5077515022 @default.
• W2092485542 date "2014-04-01" @default.
• W2092485542 modified "2023-10-16" @default.
• W2092485542 title "Low Intensity Pulsed Ultrasound (LIPUS) Influences the Multilineage Differentiation of Mesenchymal Stem and Progenitor Cell Lines through ROCK-Cot/Tpl2-MEK-ERK Signaling Pathway" @default.
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• W2092485542 doi "https://doi.org/10.1074/jbc.m113.546382" @default.
• W2092485542 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4036157" @default.
• W2092485542 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24550383" @default.
• W2092485542 hasPublicationYear "2014" @default.
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