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. 2017 Dec 19;8:283. doi: 10.1186/s13287-017-0739-3

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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. 2 — LIPUS promotes growth factor expression in hAD-MSCs. a The relative mRNA expression levels of FGF2, IGF-1, HGF, and VEGF in hAD-MSCs in the LIPUS and sham irradiation groups were detected by RT-qPCR. b The levels of IGF-1, HGF, and VEGF secreted by hAD-MSCs in the cell supernatant in the LIPUS and sham irradiation groups were detected by ELISA. *P < 0.05, **P < 0.01. HGF hepatocyte growth factor, IGF1 insulin-like growth factor-1, LIPUS low-intensity pulsed ultrasound, VEGF vascular endothelial growth factor