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. 2017 Aug 30;8:192. doi: 10.1186/s13287-017-0627-x

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Immunohistochemical analysis of mouse islet grafts. a, b Analysis 3 days post transplant shows more macrophages and less insulin in control islets (CTR, a) compared to islets cotransplanted with CP-ASCs (ASC, b). Red, F4/80⁺ cells; green, insulin. Arrows point to macrophages. c, d More cell death observed in control (c) compared to CP-ASC islets (d) identified by TUNEL assay. Green, apoptotic cells; red, β cells. Arrows point to TUNEL⁺insulin⁺ cells. e Quantification of TUNEL⁺ among insulin ⁺cells in control or CP-ASC cotransplanted islets. **p < 0.05, Student’s t test. f, g Tissues 10 days post transplant. Immunohistochemical staining of endothelial cells (CD31⁺) is less in control islets (f) compared to ASC islet grafts (g) using the anti-CD31 antibody. Red, CD31⁺ cells; green, insulin⁺ cells. Arrows point to CD31⁺ cells. Tissue sections from at least three individual mice for each condition were analyzed. a–e Observed using the ZEISS AxioImager M2 Imaging System. f, g Observed using a Leica SP5 confocal microscope. Scale bar = 50 μm. ASC adipose-derived mesenchymal stem cell, TUNEL terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (Color figure online)