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. 2016 Jul 20;6(7):160101. doi: 10.1098/rsob.160101

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© 2016 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 2. — Thoracotomy stimulates mitotic events in the intact heart without apoptotic turnover of the newly generated cells. (a) Representative image of a mitotic CM in an intact heart of transgenic fish cmlc2:EGFP at 7 dpt. Orthogonal projections demonstrate a colocalization between PH3 (red), GFP (green) and DAPI (blue) staining. (b,c) Quantification of PH3-positive CM and non-CM nuclei at 7 dpt. Mef2 was used as a CM nuclei marker. (d–f) Representative images of the TUNEL assay (green) at 4 dpci (days post-cryoinjury; positive control for apoptosis with the post-infarcted area surrounded with a dashed line), in uninjured hearts and at 4 dpt. (g) Quantification of TUNEL-positive nuclei in hearts at 4 dpci, in uninjured hearts and at different time points post-thoracotomy (n ≥ 4 hearts; ≥2 sections per heart; n.s., non-significant; ***p < 0.001).