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. 2018 Feb 23;6:14. doi: 10.1186/s40478-018-0517-1

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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. 6 — Chronic DPP-4 inhibition increases calbindin expression in the olfactory bulb of diabetic rats. a Density of CB+ interneurons and, b-c representative microphotographs of CB+ staining in the MOB of control vs. linagliptin-treated GK rats (n = 6). d Relative level of CB normalized against beta-actin and, e representative bands showing CB expression level in the MOB of control vs. linagliptin-treated GK rats (n = 4), (Western blot). Two-tailed, unpaired t-test. The data are means ±S.E.M., ** p < 0.01