The role of Smad4 in vestibular development in mice

Shi Ming Yang, An Chun Deng, De Liang Huang, Jian He Sun, Guan Yang, Ya Ping Yu, Zhao Hui Hou, Wei Wei Guo, Suo Qiang Zhai, David Z. He, Dong Yi Han, Wie Yen Young, Xiao Yang

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Abstract

The regulation of the bone morphogenetic protein (BMP) signal transduction pathway is important in the development of the inner ear and vestibular system. We reported previously that small mothers against decapentaplegic homolog-4 (Smad4) is required for inner ear cochlear development and normal auditory function in mammals; however, the distribution and functional mechanisms of Smad4 at various stages of vestibular development remained unclear. To investigate the relationship between the Smad4 gene and vestibular organ development, we measured changes in the expression of BMP4 and Smad4 during vestibular development in C57BL/6 mice. In addition, vestibular structures, pathologic changes, and the vestibular function of chondrocyte-specific Smad4 knockout mice were compared to those of the control group. We found that the expression of Smad4 in the inner ear was delayed compared with that of BMP4. Moreover, chondrocyte-specific Smad4 knockout homozygous mice showed stunted growth and partial vestibular deformities, but it showed less histologic changes in the vestibular end-organs and saccule dysfunction. These results suggest that Smad4 participates in late-stage shaping of the configuration of the vestibule and development of vestibular functional, but a Smad4-independent pathway for the inner ear vestibular BMP4 signal transduction could not be rule out.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalInternational Journal of Developmental Neuroscience
Volume29
Issue number1
DOIs
Publication statusPublished - Feb 2011

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All Science Journal Classification (ASJC) codes

  • Developmental Biology
  • Developmental Neuroscience

Cite this

Yang, S. M., Deng, A. C., Huang, D. L., Sun, J. H., Yang, G., Yu, Y. P., ... Yang, X. (2011). The role of Smad4 in vestibular development in mice. International Journal of Developmental Neuroscience, 29(1), 15-23. https://doi.org/10.1016/j.ijdevneu.2010.10.004