Analysis of embryonic mouse diaphragm reveals muscle and nerve left–right asymmetries set by a Nodal-dependent genetic cascade, which imprints different molecular signatures to left and right motoneurons that shape their innervation pattern.
Genetic analyses demonstrate that Gdf3/Vg1 is a maternal effect gene required for robust Nodal signaling during different phases of embryogenesis including germ-layer formation, Kupffer's vesicle morphogenesis, and left-right patterning.
Left-right asymmetric rotation of the Drosophila hindgut is driven by "cell sliding," a novel cellular behavior induced by chiral cell deformation, in which cells change their position relative to subjacent neighbors as sliding directionally.
Large-scale in vivo imaging of the zebrafish left-right organizer (Kupffer's vesicle) combined with fluid dynamics calculations allows to quantitatively test the possible flow detection mechanisms and supports the flow transport of chemical signals as the mechanism of side determination.
A precise sequence of left-right asymmetries, combined with mechanical constraints, is sufficient to drive the looped morphogenesis of the embryonic heart tube, with potential impact for congenital heart defects.
A genetic analysis has identified the cholinergic SIA sublateral motor neurons, which innervate all four body wall muscles separately, as crucial regulators of turning around during sleep in Caenorhabditis elegans.