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Article

Simulated Microgravity Suppresses Osteogenic Differentiation of Mesenchymal Stem Cells by Inhibiting Oxidative Phosphorylation

Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
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Int. J. Mol. Sci. 2020, 21(24), 9747; https://0-doi-org.brum.beds.ac.uk/10.3390/ijms21249747
Received: 22 November 2020 / Revised: 14 December 2020 / Accepted: 17 December 2020 / Published: 21 December 2020
(This article belongs to the Special Issue Stem Cells — from Bench to Bedside)
Studies showed that energy metabolism plays a pivotal role in the differentiation of stem cells. Previous studies revealed that simulated microgravity (SMG) inhibits osteogenic differentiation of mesenchymal stem cells (MSCs). However, the underlying relationship between osteogenesis and energy metabolism under SMG conditions is not fully understood. In the present study, we investigated mitochondrial oxidative phosphorylation (OXPHOS) by assessing the level of peroxisome proliferator activated receptor γ coactivator 1α (PGC-1α), mitochondrial DNA (mtDNA) copy number, mitochondrial mass and oxygen consumption rate (OCR) during osteogenesis of MSCs under SMG conditions. We found that SMG inhibited osteogenic differentiation and OXPHOS of MSCs. Moreover, the expression of sirtuin 1 (Sirt1), an important energy sensor, significantly decreased. After upregulating the expression of Sirt1 using resveratrol, an activator of Sirt1, SMG-inhibited OXPHOS and osteogenic differentiation of MSCs were recovered. Taken together, our results suggest that SMG suppresses osteogenic differentiation of MSCs by inhibiting OXPHOS, indicating that OXPHOS might serve as a potential therapeutic target for repairing bone loss under microgravity conditions. View Full-Text
Keywords: simulated microgravity; mesenchymal stem cells; osteogenesis; oxidative phosphorylation; Sirt1 simulated microgravity; mesenchymal stem cells; osteogenesis; oxidative phosphorylation; Sirt1
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MDPI and ACS Style

Liu, L.; Cheng, Y.; Wang, J.; Ding, Z.; Halim, A.; Luo, Q.; Song, G. Simulated Microgravity Suppresses Osteogenic Differentiation of Mesenchymal Stem Cells by Inhibiting Oxidative Phosphorylation. Int. J. Mol. Sci. 2020, 21, 9747. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms21249747

AMA Style

Liu L, Cheng Y, Wang J, Ding Z, Halim A, Luo Q, Song G. Simulated Microgravity Suppresses Osteogenic Differentiation of Mesenchymal Stem Cells by Inhibiting Oxidative Phosphorylation. International Journal of Molecular Sciences. 2020; 21(24):9747. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms21249747

Chicago/Turabian Style

Liu, Lin, Yansiwei Cheng, Jie Wang, Zhongjie Ding, Alexander Halim, Qing Luo, and Guanbin Song. 2020. "Simulated Microgravity Suppresses Osteogenic Differentiation of Mesenchymal Stem Cells by Inhibiting Oxidative Phosphorylation" International Journal of Molecular Sciences 21, no. 24: 9747. https://0-doi-org.brum.beds.ac.uk/10.3390/ijms21249747

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