Fig. 7: Negative feedback loop between canonical/non-canonical Wnts and Tlr4/NFκB determines the precise size of zebrafish dorsal organizer.

Model of the role of Tlr/NFκB signaling in the initiation of embryonic DV axis formation. In Drosophila, Wnt-mediated negative feedback regulation of Toll/NFκB signaling determines the embryonic DV pattern. In zebrafish, negative feedback regulation between canonical Wnt (caWnt), non-canonical Wnt (Wnt5b), and Tlr4/NFκB generates the precise size of the dorsal organizer and the consequent DV pattern.