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Hypoxia Inhibits Osteogenesis in Human Mesenchymal Stem Cells through Direct Regulation of RUNX2 by TWIST

Open access
Yang, Der-Chih, Yang, Muh-Hwa, Tsai, Chih-Chien, Huang, Tung-Fu, Chen, Yau-Hung, Hung, Shih-Chieh·2011·PLoS ONE

Abstract

BACKGROUND: Bone loss induced by hypoxia is associated with various pathophysiological conditions, however, little is known about the effects of hypoxia and related signaling pathways on osteoblast differentiation and bone formation. Because bone marrow-derived mesenchymal stem cells (MSCs) survive under hypoxic conditions and readily differentiate into osteoblasts by standard induction protocols, they are a good in vitro model to study the effects of hypoxia on osteoblast differentiation. METHODOLOGY/PRINCIPLE FINDINGS: Using human MSCs, we discovered TWIST, a downstream target of HIF-1α, was induced under hypoxia and acted as a transcription repressor of RUNX2 through binding to the E-box located on the promoter of type 1 RUNX2. Suppression of type 1 RUNX2 by TWIST under hypoxia further inhibited the expression of BMP2, type 2 RUNX2 and downstream targets of RUNX2 in MSCs. CONCLUSIONS/SIGNIFICANCE: Our findings point to the important role of hypoxia-mediated signalling in osteogenic differentiation in MSCs through direct regulation of RUNX2 by TWIST, and provide a method for modifying MSC osteogenesis upon application of these cells in fracture healing and bone reconstruction.

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Metadata

Authors
Yang, D.-C., Yang, M.-H., Tsai, C.-C., Huang, T.-F., Chen, Y.-H., & Hung, S.-C.
Venue
PLoS ONE
Published
2011-09-09
Volume
6
Issue
9
Pages
e23965
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2048539785
Cited by
181
References
4
FWCI
5.34
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Hypoxia Inhibits Osteogenesis in Human Mesenchymal Stem Cells through Direct Regulation of RUNX2 by TWIST. https://app.cochat.ai/papers/10.1371/journal.pone.0023965
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Yang, D.-C., Yang, M.-H., Tsai, C.-C., Huang, T.-F., Chen, Y.-H., & Hung, S.-C. (2011). Hypoxia Inhibits Osteogenesis in Human Mesenchymal Stem Cells through Direct Regulation of RUNX2 by TWIST. PLoS ONE. https://doi.org/10.1371/journal.pone.0023965

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