Fig. 5
- ID
- ZDB-FIG-170907-7
- Publication
- Sugimoto et al., 2017 - Dissection of zebrafish shha function using site-specific targeting with a Cre-dependent genetic switch.
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Epicardial shha expression promotes subepicardial cardiomyocyte proliferation during heart regeneration. (A) Schematic of the experiment. (B) Semi-qRT-PCR analysis of shha in purified tcf21:DsRed2+ epicardial cells obtained from uninjured and injured (7 dpi) tcf21:DsRed hearts. Injury was confirmed by the induction of raldh2 expression. (C) Semi-qRT-PCR analysis of Hh pathway genes using purified tcf21:DsRed2+ epicardial cells obtained from 4-HT?treated 7 dpi tcf21:DsRed; shhact/ct (control, left) and tcf21:DsRed; tcf21:CreER; shhact/ct hearts (right). (D) Immunofluorescence images of the subepicardial (top) and trabecular areas (bottom) of heart sections obtained from 4-HT?treated 7 dpi shhact/ct (control) or tcf21:CreER; shhact/ct hearts. Brackets, subepicardial areas. Dotted lines, approximate amputation plane. Arrows indicate proliferating cardiomyocytes. (E) Quantification of cardiomyocyte proliferation in the subepicardial and trabecular areas of the heart sections obtained from 4-HT?treated 7 dpi shhact/ct (control) or tcf21:CreER; shhact/ct hearts shown in D (n = 6 each). The data are presented as the mean ± SEM (**p<0.01, Mann?Whitney U test). N.S., not significant (p=0.3367). (F) Image of heart sections obtained from 7 dpi gata4:EGFP; tcf21;DsRed2 fish. Subepicardial cardiomyocytes (green, arrows) associate with epicardial cells (magenta, arrowheads). (G) Semi-qRT-PCR analysis of shha pathway genes using purified subepicardial cardiomyocytes obtained from 7 dpi gata4:EGFP ventricles. Cardiomyocytes purified from uninjured cmlc2:EGFP ventricles were used as negative controls. Scale bar, 50 ?m. |
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Stage: | Adult |
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Stage: | Adult |