Figure 1.
Concentration-dependent effects of HU 210 (A,E), HU 211 (B), CBD (C,E), and AEA (D) on the development and survival of chick embryos. The protective effects of 100 µM α-tocopherol (α-Toc.) or 1 µM AM251 against the embryotoxic effects produced by 10 µM HU 210 or 50 µM CBD are shown in (E). The embryos were treated in ovo with the test compounds by repeated injections (after 1, 4 and 7 days) in the yolk. On day 10, the eggs were cracked and embryos were analyzed in terms of their viability (as indicated in panels as percentage live embryos) and anatomical stage according to the Hamburger-Hamilton scale. Shown are dot plots with means ± SEM of 6–25 individual embryos per treatment. Statistically significant differences (one-way ANOVA with post-hoc Dunnett´s multiple comparison test) are indicated as: *P < 0.05, **P < 0.01, ***P < 0.001, or ****P < 0.0001, when the HH stage at each CB treatment group is compared with corresponding vehicle (0.05% DMSO or EtOH) controls, and in (E) when the combination of CB + α-Toc. or AM251 are compared with CB treatment per se.