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. 2017 Dec 1;7:16757. doi: 10.1038/s41598-017-16727-1

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Effect of SLIT1 supplementation on axonal growth of hESC- and hiPSC-derived RGCs. (a) Axonal growth of hESC- and hiPSC-derived RGCs is observed by immunostaining of NFL. In the control, hESC- and hiPSC-derived RGCs axons grow radially and straight (left panels). In contrast, the growth pattern of axons after SLIT1 supplementation is complex. Axonal growth of hESC- and hiPSC-derived RGCs is not inhibited by addition of 0.2 and 1.0 µg of SLIT1 supplementation from D27−30 (centre and right panels, respectively). However, axonal paths are disturbed (centre and right panels). The assessment at D27 is performed in RMM supplemented with 1.0% FBS and 100 ng/ml BDNF. (b) Real-time PCR analysis of mRNA expression of axonal markers, TAU, NFL, and TUJ1. Expression levels of axonal markers are not influenced by SLIT1 supplementation at any of the concentrations tested. Scale bar, 100 μm. Error bars indicate ± SD. Each column shows an average value for the studied samples. The sample size for all mRNA data is five (n = 5). NS, not significant.