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. 2018 Oct 25;9:290. doi: 10.1186/s13287-018-1010-2

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© The Author(s). 2018

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. 2 — Human cardiac/stem progenitor cells (hCSCs) display a favorable immune-suppressive phenotype. Representative expression of the immune relevant molecules indoleamine 2,3-dioxygenase (IDO) and programmed death ligand 1 (PDL-1) after 24 and 48 h in untreated (black line histograms) and interferon (IFN)-γ-activated (red line histograms) cells against isotype controls (gray-filled histograms). The percentages (%) of positive cells are indicated. Human adipose-derived mesenchymal stem cells (hASCs) were used as a positive control for IDO expression. hCSC results are shown for donor hCPC8. Other donors presented similar results