Reference : RUNX3, EGR1 AND SOX9B FORM A REGULATORY CASCADE REQUIRED TO MODULATE BMP-SIGNALING DURIN...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/133437
RUNX3, EGR1 AND SOX9B FORM A REGULATORY CASCADE REQUIRED TO MODULATE BMP-SIGNALING DURING CRANIAL CARTILAGE DEVELOPMENT IN ZEBRAFISH.
English
Dalcq, Julia mailto [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes et modélisation >]
Pasque, Vincent [> >]
Ghaye, Aurélie mailto [Université de Liège - ULg > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire >]
Larbuisson, Arnaud mailto [Université de Liège - ULg > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire >]
Motte, Patrick mailto [Université de Liège - ULg > Département des sciences de la vie > Génomique fonctionnelle et imagerie moléculaire végétale >]
Martial, Joseph mailto [Université de Liège - ULg > Département des sciences de la vie > Département des sciences de la vie >]
Muller, Marc mailto [Université de Liège - ULg > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire >]
2012
PLoS ONE
Public Library of Science
in press
Yes
International
1932-6203
San Franscisco
CA
[en] The cartilaginous elements forming the pharyngeal arches of the zebrafish derive from cranial neural crest cells. Their proper differentiation and patterning are regulated by reciprocal interactions between neural crest cells and surrounding endodermal, ectodermal and mesodermal tissues. In this study, we show that the endodermal factors Runx3 and Sox9b form a regulatory cascade with Egr1 resulting in transcriptional repression of the fsta gene, encoding a BMP antagonist, in pharyngeal endoderm. Using a transgenic line expressing a dominant negative BMP receptor or a specific BMP inhibitor (dorsomorphin), we show that BMP signaling is indeed required around 30 hpf in the neural crest cells to allow cell differentiation and proper pharyngeal cartilage formation. Runx3, Egr1, Sox9b and BMP signaling are required for expression of runx2b, one of the key regulator of cranial cartilage maturation and bone formation. Finally, we show that egr1 depletion leads to increased expression of fsta and inhibition of BMP signaling in the pharyngeal region.
In conclusion, we show that the successive induction of the transcription factors Runx3, Egr1 and Sox9b constitutes a regulatory cascade that controls expression of Follistatin A in pharyngeal endoderm, the latter modulating BMP signaling in developing cranial cartilage in zebrafish.
Researchers
http://hdl.handle.net/2268/133437

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