Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Abstract:
A striking characteristic of vertebrate embryos is their bilaterallysymmetric body plan, which is particularly obvious at the levelof the somites and their derivatives such as the vertebral column.Segmentation of the presomitic mesoderm must therefore be tightlycoordinated along the left and right embryonic sides. We showthat mutant mice defective for retinoic acid synthesis exhibitdelayed somite formation on the right side. Asymmetric somiteformation correlates with a left-right desynchronization ofthe segmentation clock oscillations. These data implicate retinoicacid as an endogenous signal that maintains the bilateral synchronyof mesoderm segmentation, and therefore controls bilateral symmetry,in vertebrate embryos.
1 Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP/Collège de France, BP 10142, 67404 Illkirch Cedex, Strasbourg, France. 2 Departments of Medicine and Molecular Biology, Center for Cardiovascular Development, Baylor College of Medicine, Houston, TX 77030, USA.
* These authors contributed equally to this work.
Present address: Beckman Institute, California Institute ofTechnology, Pasadena, CA 91125, USA.
To whom correspondence should be addressed. E-mail: dolle{at}igbmc.u-strasbg.fr (P.D.); julien{at}igbmc.u-strasbg.fr (J.V.)
The editors suggest the following Related Resources on Science sites:
The period of the somite segmentation clock is sensitive to Notch activity.
W. Kim, T. Matsui, M. Yamao, M. Ishibashi, K. Tamada, T. Takumi, K. Kohno, S. Oba, S. Ishii, Y. Sakumura, et al. (2011)
Mol. Biol. Cell
22, 3541-3549
|Abstract »|Full Text »|PDF »
FGF4 and FGF8 comprise the wavefront activity that controls somitogenesis.