{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T11:10:40Z","timestamp":1772277040340,"version":"3.50.1"},"reference-count":71,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,11,9]],"date-time":"2022-11-09T00:00:00Z","timestamp":1667952000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81874325"],"award-info":[{"award-number":["81874325"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["CNS Neurosci Ther"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aims<\/jats:title><jats:p>Resistance to valproic acid (VPA) is a major challenge for epilepsy treatment. We aimed to explore the mechanism underlying this resistance.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Pentylenetetrazol\u2010induced chronic epileptic rats were administered VPA (250\u2009mg\/Kg) for 14\u2009days; rats with controlled seizure stages (seizure score<jats:sup>14th\u2010before<\/jats:sup>\u2009\u22640) and latent time (latent time<jats:sup>14th\u2010before<\/jats:sup>\u2009\u22650) were considered VPA\u2010responsive, while the others were considered nonresponsive. Differentially expressed genes (DEGs) between the VPA\u2010responsive and nonresponsive rat hippocampus transcriptomes were identified, and their functions were evaluated. The roles of postsynaptic density (PSD) and Homer1 were also determined. Furthermore, a subtype of Homer1 (Homer1b\/c) was overexpressed or silenced in HT22 cells to determine its effect on VPA efficacy. Moreover, the membrane levels of mGluR1\/5 directly bound to Homer1b\/c were assessed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Overall, 264 DEGs commonly enriched in the PSD between VPA\u2010responsive and nonresponsive rats. Among them, Homer1 was more highly expressed in the hippocampus of nonresponses compared to that of responses. Overexpression of Homer1b\/c interrupted VPA efficacy by increasing reactive oxygen species production, lactate dehydrogenase release, and calcium content. Furthermore, it induced the overexpression of mGluR1 and mGluR5.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Overexpression of Homer1b\/c influenced VPA efficacy, revealing it could be a target to improve the efficacy of this treatment.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cns.14008","type":"journal-article","created":{"date-parts":[[2022,11,10]],"date-time":"2022-11-10T07:09:19Z","timestamp":1668064159000},"page":"331-343","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Overexpression of Homer1b\/c induces valproic acid resistance in epilepsy"],"prefix":"10.1111","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8021-0726","authenticated-orcid":false,"given":"Yan","family":"Wang","sequence":"first","affiliation":[{"name":"Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Key Laboratory for Research and Development of Tropical Herbs, 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