Fig. 8
Tbx20's cardiac expansion activity requires its DNA binding and transcriptional activation domains. (A) Schematic diagram of the Tbx20-GR, Tbx20-?tbx-GR (a T-box-defective form of Tbx20), Tbx20-?act-GR (a transactivation-defective form of Tbx20), Tbx20-?rep-GR (a transrepression-defective form of Tbx20), and TbxVP16-GR (a transactivation-only form of Tbx20) fusion proteins. (B?D) Tbx20-GR-injected embryos treated with DXS have significantly more cardiomyocytes (n=6). (E?G) Tbx20-?tbx-GR overexpression did not significantly enhance cardiomyocyte production (n=6). (H?J) Overexpression of Tbx20-?act-GR did not significantly enhance cardiomyocyte production (n=6). (K?M) Overexpression of Tbx20-?rep-GR significantly increased cardiomyocyte number (n=6). (N?P) Overexpression of TbxVP16-GR significantly increased cardiomyocyte production (n=6). Error bars indicate standard deviations. ns indicates there is no significant difference compared with control embryos. Asterisks indicate a significant difference (*p<0.05, **p<0.01, ***p<0.001). |
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Stage: | Long-pec |
Reprinted from Developmental Biology, 421(2), Lu, F., Langenbacher, A., Chen, J.N., Tbx20 drives cardiac progenitor formation and cardiomyocyte proliferation in zebrafish, 139-148, Copyright (2017) with permission from Elsevier. Full text @ Dev. Biol.