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. 2018 Sep 18;8:13979. doi: 10.1038/s41598-018-32334-0

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© The Author(s) 2018

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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15d-PGJ₂-loaded NC reduce MSU-induced leukocyte recruitment and synovitis in a PPAR-γ-sensitive manner. Fifteen hours after MSU, knee joints were collected for: counting of total leukocytes (A), neutrophils (B), mononuclear cells (C), Histopathological analysis by HE staining to asses synovitis (D) (Original magnification 400x) by a total score of inflammatory cells per field (E), and determination of LysM-GFP⁺ neutrophil recruitment by confocal microscopy (F,G). Original magnification 200x. Panel F shows the percentagem of LysM-eGFP + fluorescence. Results are mean ± SEM, n = 6, two independent experiments (*p < 0.05 vs. control group; ^#p < 0.05 vs. vehicle mg/kg group, **p < 0.05 vs 15d-PGJ₂-loaded NC. One-way ANOVA and post-test of Tukey).