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. 2019 Nov 22;9:17368. doi: 10.1038/s41598-019-53415-8

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© The Author(s) 2019

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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Immunoblot analysis of expression ratios of the pre and postsynaptic proteins in Aβ-GFP Tg and non-Tg mice synapse. (A,B) Synaptosome fractions from hippocampus (20 μg/lane) were immunoblotted against presynaptic markers (A; synaptophysin, VAMP-2, syntaxin-1, and Munc13–1) and postsynaptic markers (B; PSD-95, GluN1, GluN2A, GluN2B, GluA2, and neuroligin). We prepared 4 sets of Aβ-GFP Tg/non-Tg samples. Band intensities of Aβ-GFP Tg mice were normalized by those of actin and the expression were calculated ratios with the values of non-Tg mice as 1. There was no difference in expression ratios of the presynaptic proteins we examined. However, expression of the postsynaptic proteins GluN2B, Glu2A, and neuroligin were significantly decreased in Aβ-GFP Tg mice at 3-month-old (*p < 0.05 by Mann-Whitney’s U test, n = 4 that included hippocampi from 3 animals each, data are presented as means ± SEM). (C) The expression ratios of GluN2B in homogenate. There was no significant difference in the expression ratios of GluN2B in homogenates of Aβ-GFP Tg and non-Tg mice (Mann-Whitney’s U test, n = 5 animals each, data are presented as means ± SEM).