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. 2022 Jun 20;19:160. doi: 10.1186/s12974-022-02518-7

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© The Author(s) 2022

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. 1 — Expression of Apelin decreased after spinal cord injury (SCI). A Spinal cord sections obtained from healthy uninjured rats (control) and SCI rats on days 1, 3, 7, 14 and 28 after SCI; Apelin protein levels were normalized to that of GAPDH after western blotting. B Gene expression of Apelin was quantified in total RNA isolated from spinal cord tissue using qRT-PCR with specific primers; GAPDH was used as a loading control for qRT-PCR. C Serum Apelin was assayed by ELISA after SCI. (*p < 0.05, **p < 0.01 vs. Sham group, ^#p < 0.05 14 d vs. 28 d, mean ± SD)