{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T04:49:16Z","timestamp":1788497356390,"version":"build-2803163510"},"reference-count":82,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2024,10,23]],"date-time":"2024-10-23T00:00:00Z","timestamp":1729641600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["NS101880"],"award-info":[{"award-number":["NS101880"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["NS132398"],"award-info":[{"award-number":["NS132398"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Pamela and Wayne Garrison Distinguished Chair Endowment"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,4,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Gabapentin and pregabalin are inhibitory ligands of both \u03b12\u03b4-1 and \u03b12\u03b4-2 proteins (also known as subunits of voltage-activated Ca2+ channels) and are commonly prescribed for the treatment of neuropathic pain and epilepsy. However, these drugs can cause gait disorders and ataxia through unknown mechanisms. \u03b12\u03b4-2 and GluK1, a glutamate-gated kainate receptor subtype, are coexpressed in cerebellar Purkinje cells. In this study, we used a heterologous expression system and Purkinje cells to investigate the potential role of \u03b12\u03b4-2 in regulating GluK1-containing kainate receptor activity.<\/jats:p>\n               <jats:p>Whole-cell patch-clamp recordings showed that \u03b12\u03b4-2 coexpression augmented GluK1, but not GluK2, currents in HEK293 cells, and pregabalin abolished this augmentation. Pregabalin lost its inhibitory effect on GluK1 currents in HEK293 cells expressing both GluK1 and the \u03b12\u03b4-2(R282A) mutant. Blocking GluK1-containing receptors with UBP310 substantially reduced the amplitude of excitatory post-synaptic currents at parallel fibre\u2013Purkinje cell synapses in mice. Also, pregabalin markedly attenuated the amplitude of excitatory post-synaptic currents and currents elicited by ATPA, a selective GluK1 receptor agonist, in Purkinje cells in Cacna2d1 knockout mice. Co-immunoprecipitation assays indicated that \u03b12\u03b4-2, but not \u03b12\u03b4-1, formed a protein complex with GluK1 in cerebellar tissues and HEK293 cells through its C-terminus. Furthermore, \u03b12\u03b4-2 coexpression potentiated surface expression of GluK1 proteins in HEK293 cells, whereas pregabalin reduced GluK1 proteins in cerebellar synaptosomes.<\/jats:p>\n               <jats:p>Disrupting \u03b12\u03b4-2\u2013GluK1 interactions using \u03b12\u03b4-2 C-terminus peptide abrogated the potentiating effect of \u03b12\u03b4-2 on GluK1 currents and attenuated the amplitude of GluK1-mediated excitatory post-synaptic currents in Purkinje cells. However, neither pregabalin nor \u03b12\u03b4-2 C-terminus peptide had significant effect on P\/Q-type currents in HEK293 cells. Additionally, CRISPR\/Cas9-induced conditional knockdown of Cacna2d2 or Grik1 in Purkinje cells, in addition to microinjection of \u03b12\u03b4-2 C-terminus peptide or UBP310 into the cerebellum, substantially impaired beam-walking and rotarod performance in mice.<\/jats:p>\n               <jats:p>Our study reveals that \u03b12\u03b4-2 directly interacts with GluK1 independently of its conventional role as a voltage-activated Ca2+ channel subunit. \u03b12\u03b4-2 regulates motor coordination by promoting synaptic expression and activity in GluK1-containing kainate receptors in Purkinje cells.<\/jats:p>","DOI":"10.1093\/brain\/awae333","type":"journal-article","created":{"date-parts":[[2024,10,23]],"date-time":"2024-10-23T06:06:21Z","timestamp":1729663581000},"page":"1271-1285","source":"Crossref","is-referenced-by-count":5,"title":["\u03b12\u03b4-2 regulates synaptic GluK1 kainate receptors in Purkinje cells and motor coordination"],"prefix":"10.1093","volume":"148","author":[{"given":"Meng-Hua","family":"Zhou","sequence":"first","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing-Jing","family":"Zhou","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shao-Rui","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daozhong","family":"Jin","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuying","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian-Ying","family":"Shao","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8444-3770","authenticated-orcid":false,"given":"Hui-Lin","family":"Pan","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center , Houston, TX 77030 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