Figure 7
From: Glycogen synthase kinase 3α and 3β have distinct functions during cardiogenesis of zebrafish embryo
GSK3β modulates zebrafish cardiac valve formation. Whole-mount in situ hybridization with bmp4 and versican staining reveals that cardiac valve development was affected in gsk3β morphants. At 60–72 hpf,versican (A, B) and bmp4 (C, D) expression was greatly up-regulated in gsk3β morphants. Tg(cmlc2: Hc-RFP) embryos were injected with gsk3β-MO and observed by in vivo two-photon fluorescence imaging of a live transgenic zebrafish heart at 100 hpf. The endocardial cells and blood are labeled yellow; the Hc-GFP-positive myocardial cells are labeled red. Valves are clearly observed in wild-type embryos (E; white arrows), but not in gsk3β morphants (F). b, blood cells; V, ventricle; A, atrium.