Fig. 10.
Pyknotic nuclei in different regions of the GD9 embryos exposed to HU. (A) Propidium iodide staining of the RNE, CNE, NT, somite (S), and heart (H) in saline and HU-exposed embryos at 0.5, 3, and 6h posttreatment. The arrowheads indicate pyknotic nuclei. (B) Quantification of pyknotic nuclei by IMARIS. Each bar (mean ± SEM) represents the percentage of pyknotic nuclei. Embryos from five litters per treatment group were analyzed. Asterisks, dagger, and double dagger denote a significant difference from saline control at the same time point (*p < 0.05; †p < 0.01; ‡p < 0.001, Dunnett’s test).