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Int. J. Mol. Sci. 2015, 16(8), 17734-17745;

BAMBI Promotes C2C12 Myogenic Differentiation by Enhancing Wnt/β-Catenin Signaling

Laboratory of Animal Fat Deposition and Muscle Development, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
Author to whom correspondence should be addressed.
Academic Editor: Alan Leonard
Received: 7 July 2015 / Revised: 7 July 2015 / Accepted: 30 July 2015 / Published: 3 August 2015
(This article belongs to the Special Issue Molecular Machinery of Cell Growth Regulation)
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Bone morphogenic protein and activin membrane-bound inhibitor (BAMBI) is regarded as an essential regulator of cell proliferation and differentiation that represses transforming growth factor-β and enhances Wnt/β-catenin signaling in various cell types. However, its role in skeletal muscle remains largely unknown. In the current study, we found that the expression level of BAMBI peaked in the early differentiation phase of the C2C12 rodent myoblast cell line. Knockdown of BAMBI via siRNA inhibited C2C12 differentiation, indicated by repressed MyoD, MyoG, and MyHC expression as well as reductions in the differentiation and fusion indices. BAMBI knockdown reduced the activity of Wnt/β-catenin signaling, as characterized by the decreased nuclear translocation of β-catenin and the lowered transcription of Axin2, which is a well-documented target gene of the Wnt/β-catenin signaling pathway. Furthermore, treatment with LiCl, an activator of Wnt/β-catenin signaling, rescued the reduction in C2C12 differentiation caused by BAMBI siRNA. Taken together, our data suggest that BAMBI is required for normal C2C12 differentiation, and that its role in myogenesis is mediated by the Wnt/β-catenin pathway. View Full-Text
Keywords: BAMBI; Wnt/β-catenin; myogenic differentiation; LiCl; C2C12 BAMBI; Wnt/β-catenin; myogenic differentiation; LiCl; C2C12

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Zhang, Q.; Shi, X.-E.; Song, C.; Sun, S.; Yang, G.; Li, X. BAMBI Promotes C2C12 Myogenic Differentiation by Enhancing Wnt/β-Catenin Signaling. Int. J. Mol. Sci. 2015, 16, 17734-17745.

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