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. 2021 May 29;12:303. doi: 10.1186/s13287-021-02315-8

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© The Author(s) 2021

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 8 — Fluorescence intensity analysis of p75^NTR, S100, and neurofilament on sciatic nerve at 30 days in both sham and PCL + MSC groups. a–c Expression of the receptor p75^NTR in the proximal region of the nerve and integrated pixel density analysis. d–f Expression of the Schwann cell marker S-100 in the proximal region of the nerve and integrated pixel density analysis. g–i Expression of neurofilament in the proximal region of the nerve and integrated pixel density analysis. The values of the integrated pixel density are represented as mean ± SEM. p < 0.05*; p < 0.01**; p < 0.001***. Scale bar: 50 μm