JNK signalling controls remodelling of the segment boundary through cell reprogramming during Drosophila morphogenesis.

ABSTRACT: Segments are fundamental units in animal development which are made of distinct cell lineages separated by boundaries. Although boundaries show limited plasticity during their formation for sharpening, cell lineages make compartments that become tightly restricted as development goes on. Here, we characterize a unique case of breaking of the segment boundary in late drosophila embryos. During dorsal closure, specific cells from anterior compartments cross the segment boundary and enter the adjacent posterior compartments. This cell mixing behaviour is driven by an anterior-to-posterior reprogramming mechanism involving de novo expression of the homeodomain protein Engrailed. Mixing is accompanied by stereotyped local cell intercalation, converting the segment boundary into a relaxation com

SUBMITTER: Gettings M 

PROVIDER: S-EPMC2882433 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature