Fig. S9
BCI215 is specific for Dusp6 (A) Cryosections of WT and dusp6pt30a/+ hearts at 7 dpa injected for 6 days with DMSO (WT n=33; dusp6pt30a/+ n=17), or 0.25 mg/Kg of BCI215 (WT n=7; dusp6pt30a/+ n=11), stained for Mef2c and PCNA. (B) Quantification of cardiomyocyte proliferation in hearts injected with BCI215, or vehicle DMSO. Sub-optimal dose of BCI215 does not affect cardiomyocyte proliferation in WT hearts, but increases cardiomyocyte proliferation in dusp6pt30a/+ hearts. **p<0.01; n.s.=not significant. One-way ANOVA. (C) Cryosections of WT and dusp6pt30a/+ hearts at 7 dpa injected with DMSO (WT n=25; dusp6pt30a/+ n=15), or 0.5 mg/Kg of BCI215 (WT n=21; dusp6pt30a/+ n=8), stained for Mef2c and PCNA. (D) Quantification of cardiomyocyte proliferation. Optimal dose of BCI215 increases cardiomyocyte proliferation in WT hearts but it does not affect cardiomyocyte proliferation in dusp6pt30a/+ hearts ****p<0.0001; n.s.=not significant. One-way ANOVA. Scale bars, 100 μm.