Fig. 7

A Anti-active Caspase-3 (The upper panel) and TUNEL (The Lower Panel) staining on 28 hpf (4 h post treatment) wild-type zebrafish embryos with DMSO or DMSO plus 3.3 μM PMA. Representative figures showing phenotypic categories of the apoptotic degree. Arrows points out apoptotic area in tail region in WT embryos with DMSO alone or with DMSO plus 3.3 μM PMA for 4 h. Scale bar, 1000 μM. B Quantification of fluorescence intensity of tail region of DMSO-treated and PMA-treated embryos in mild and severe categories with anti-active Caspase-3. Each dot represents MFI of the tail region of individual embryos from three independent experiments. Bars represent mean ± SEM. ****p < 0.0001. C Quantification of the fluorescence intensity of tail region of DMSO-treated and PMA-treated embryos in mild and severe categories for TUNEL staining. Each dot represents mean fluorescence intensity (MFI) of the tail region of individual embryos from two independent experiments. Bars represent mean ± SEM. ****p < 0.0001. D Loss of both puma and noxa partially rescued PMA-induced apoptosis at 24 hpf. Percentage of phenotypic categories in wild type, bbc3^−/− and pmaip1^−/− zebrafish embryos. n = 4 (wild type and bbc3^−/−) and n = 7 (pmaip1^−/−) from pooled embryos per sample. The total number of PMA-treated embryos: wild type > 600, bbc3^−/− > 440, and pmaip1^−/− > 800. Bars represent mean ± SEM. ***p < 0.001. E qRT-PCR analysis of puma and noxa after DMSO or 3.3 μM PMA treatment in 24 hpf zebrafish embryos across time (2hpt and 4 hpt). Expression levels were normalized to GAPDH. n = 5 (26 hpf WT) and n = 7 (28 hpf WT) from around 30 pooled embryos per sample. Bars represent mean ± SEM. ***p < 0.001; ****p < 0.0001.