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. 2018 Feb 13;9:36. doi: 10.1186/s13287-018-0777-5

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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. 7 — UC-MSC transplantation promotes angiogenesis. a Vascular endothelial growth factor (VEGF)A mRNA expression in single, twice, and thrice transplantation groups was detected by qRT-PCR. b Matrix metalloprotein (MMP)9 mRNA expression in single, twice, and thrice transplantation groups was detected by qRT-PCR. c CD31 mRNA expression in single, twice, and thrice transplantation groups was detected by qRT-PCR. GAPDH serves as an internal reference for qRT-PCR. *P < 0.05, **P < 0.01. d CD31 protein expression in single, twice, and thrice transplantation groups was detected by immunohistochemistry (400×). MSC mesenchymal stem cell, TD8 transplantation day 8