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. 2017 Dec 15;49(12):e411. doi: 10.1038/emm.2017.219

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Quantification of pigment epithelium-derived factor (PEDF) by enzyme-linked immunosorbent assay (ELISA) in conditioned medium of human umbilical cord mesenchymal stem cells (HUCMSCs), HUCMSCs co-cultured with ARPE19, and ARPE19 cells. A cultured medium was used as a negative control. The results were from three independent experiments and are expressed as the mean±s.d.