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. 2022 Aug 10;23(1):98. doi: 10.1186/s10194-022-01469-x

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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. 4 — Effect of the DRD2 antagonist sulpiride on pain behaviors and GLUA1 trafficking. A, B and C The mechanical, thermal, and periorbital pain thresholds after sulpiride (30 µg) injection. Two-way ANOVA with the Bonferroni post hoc test; n = 6/group; ***P < 0.05 vs. the Sham group; #P < 0.05, ###P < 0.001 vs. the CM + DMSO group. D-G, Immunoblot analysis indicated that the protein levels of p-ERK and PSD95 and the plasma membrane level of GLUA1 were further elevated by sulpiride. One-way ANOVA with Dunnett’s post hoc test; n = 6/group; *P < 0.05, **P < 0.01, ***P < 0.001 vs. the Sham + DMSO group; #P < 0.05, ##P < 0.01, ###P < 0.001 vs. the CM + DMSO group