{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:22:09Z","timestamp":1787026929870,"version":"build-2736575974"},"reference-count":71,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,4,17]],"date-time":"2023-04-17T00:00:00Z","timestamp":1681689600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Neurol."],"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To test the feasibility and reliability of intracranial electrophysiological recordings in an acute status epilepticus model on laboratory swine.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method<\/jats:title>\n                    <jats:p>\n                      Intrahippocampal injection of kainic acid (KA) was performed on 17 male Bama pigs (\n                      <jats:italic>Sus scrofa domestica<\/jats:italic>\n                      ) weighing between 25 and 35 kg. Two stereoelectroencephalography (SEEG) electrodes with a total of 16 channels were implanted bilaterally along the sensorimotor cortex to the hippocampus. Brain electrical activity was recorded 2\u2009h daily for 9\u201328\u2009days. Three KA dosages were tested to evaluate the quantities capable of evoking status epilepticus. Local field potentials (LFPs) were recorded and compared before and after the KA injection. We quantified the epileptic patterns, including the interictal spikes, seizures, and high-frequency oscillations (HFOs), up to 4\u2009weeks after the KA injection. Test\u2013retest reliability using intraclass correlation coefficients (ICCs) were performed on interictal HFO rates to evaluate the recording stability of this model.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The KA dosage test suggested that a 10\u2009\u03bcl (1.0\u2009\u03bcg\/\u03bcl) intrahippocampal injection could successfully evoke status epilepticus lasting from 4 to 12\u2009h. At this dosage, eight pigs (50% of total) had prolonged epileptic events (tonic-chronic seizures\u2009+\u2009interictal spikes\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20095, interictal spikes alone\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20093) in the later 4\u2009weeks of the video-SEEG recording period. Four pigs (25% of total) had no epileptic activities, and another four (25%) had lost the cap or did not complete the experiments. Animals that showed epileptiform events were grouped as E\u2009+ (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20098) and the four animals showing no signs of epileptic events were grouped as E\u2013 (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20094). A total of 46 electrophysiological seizures were captured in the 4-week post-KA period from 4 E\u2009+ animals, with the earliest onset on day 9. The seizure durations ranged from 12 to 45\u2009s. A significant increase of hippocampal HFOs rate (num\/min) was observed in the E+ group during the post-KA period (weeks 1, 2,4,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&amp;lt;\u20090.05) compared to the baseline. But the E-showed no change or a decrease (in week 2,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.43) compared to their baseline rate. The between-group comparison showed much higher HFO rates in E\u2009+ vs. E \u2013 (\n                      <jats:italic>F<\/jats:italic>\n                      \u2009=\u200935,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&amp;lt;\u20090.01). The high ICC value [ICC (1,\n                      <jats:italic>k<\/jats:italic>\n                      )\u2009=\u20090.81,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&amp;lt;\u20090.05] quantified from the HFO rate suggested that this model had a stable measurement of HFOs during the four-week post-KA periods.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Significance<\/jats:title>\n                    <jats:p>This study measured intracranial electrophysiological activity in a swine model of KA-induced mesial temporal lobe epilepsy (mTLE). Using the clinical SEEG electrode, we distinguished abnormal EEG patterns in the swine brain. The high test\u2013retest reliability of HFO rates in the post-KA period suggests the utility of this model for studying mechanisms of epileptogenesis. The use of swine may provide satisfactory translational value for clinical epilepsy research.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fneur.2023.1077702","type":"journal-article","created":{"date-parts":[[2023,4,17]],"date-time":"2023-04-17T11:07:11Z","timestamp":1681729631000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["Intracranial electrophysiological recordings on a swine model of mesial temporal lobe epilepsy"],"prefix":"10.3389","volume":"14","author":[{"given":"Fengjun","family":"Zhu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanwen","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lin","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anatol","family":"Bragin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dezhi","family":"Cao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuan","family":"Cheng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2023,4,17]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"18024","DOI":"10.1038\/nrdp.2018.24","article-title":"Epilepsy","volume":"4","author":"Devinsky","year":"2018","journal-title":"Nat 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