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. 2018 Sep 6;19:52. doi: 10.1186/s12868-018-0455-7

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 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.

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Fig. 1 — Cell viability was determined by MTT assay. a Cultured rat hippocampal neurons were treated with the indicated concentrations (0.1–30 ng/mL) of IL-1β for 48 h. b Cultured rat hippocampal neurons were treated with 20 ng/mL IL-1β for the indicated time. Percentage of cell viability was relative to the untreated control cells. *P < 0.05, **P < 0.01 versus control group (n = 6)