Abstract：
:Breathing is a bilaterally synchronous behavior that relies on a respiratory rhythm generator located in the brainstem. An essential component of this generator is the preBötzinger complex (preBötC), which paces inspirations. Little is known about the developmental origin of the interneuronal populations forming the preBötC oscillator network. We found that the homeobox gene Dbx1 controls the fate of glutamatergic interneurons required for preBötC rhythm generation in the mouse embryo. We also found that a conditional inactivation in Dbx1-derived cells of the roundabout homolog 3 (Robo3) gene, which is necessary for axonal midline crossing, resulted in left-right de-synchronization of the preBötC oscillator. Together, these findings identify Dbx1-derived interneurons as the core rhythmogenic elements of the preBötC oscillator and indicate that Robo3-dependent guidance signaling in these cells is required for bilaterally synchronous activity.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Bouvier J,Thoby-Brisson M,Renier N,Dubreuil V,Ericson J,Champagnat J,Pierani A,Chédotal A,Fortin Gdoi
10.1038/nn.2622subject
Has Abstractpub_date
2010-09-01 00:00:00pages
1066-74issue
9eissn
1097-6256issn
1546-1726pii
nn.2622journal_volume
13pub_type
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