Cecilie Gjessing Nome

• Cross, J. Helen; Coleman, Lauren; Oritz, Sebastian; Ivaniuk, Alina; Nome, Cecilie Gjessing & Roza, Eugenia [Vis alle 14 forfattere av denne artikkelen] (2026). Widening participation in the International League Against Epilepsy: Looking to the future. Epilepsia Open. doi: 10.1002/epi4.70272. Fulltekst i vitenarkiv
• Nome, Cecilie Gjessing; Ravat, Parthvi; Bartolomei, Fabrice; Curtis, Marco de; Sapia, Rossella Di & Galovic, Marian [Vis alle 23 forfattere av denne artikkelen] (2026). ILAE-YES global webinar series: Integrating clinical and basic science in epilepsy research. Epilepsia Open. doi: 10.1002/epi4.70267. Fulltekst i vitenarkiv
• Enriquez, Brian Anthony; Nome, Terje; Nome, Cecilie; Tennøe, Bjørn; Lund, Christian & Beyer, Mona K. [Vis alle 8 forfattere av denne artikkelen] (2023). Predictors of outcome after endovascular treatment for tandem occlusions: a single center retrospective analysis. BMC Neurology. 23, s. 1–9. doi: 10.1186/s12883-023-03127-4. Fulltekst i vitenarkiv Vis sammendrag

  Background The endovascular treatment procedure in tandem occlusions (TO) is complex compared to single occlusion (SO) and optimal management remains uncertain. The aim of this study was to identify clinical and procedural factors that may be associated to efficacy and safety in the management of TO and compare functional outcome in TO and SO stroke patients. Methods This is a retrospective single center study of medium (MeVO) and large vessel occlusion (LVO) of the anterior circulation. Clinical, imaging, and interventional data were analyzed to identify predictive factors for symptomatic intracranial hemorrhage (sICH) and functional outcome after endovascular treatment (EVT) in TO. Functional outcome in TO and SO patients was compared. Results Of 662 anterior circulation stroke patients with MeVO and LVO stroke, 90 (14%) had TO. Stenting was performed in 73 (81%) of TO patients. Stent thromboses occurred in 8 (11%) patients. Successful reperfusion with modified thrombolysis in cerebral infarction (mTICI) ≥ 2b was achieved in 82 (91%). SICH occurred in seven (8%). The strongest predictors for sICH were diabetes mellitus and number of stent retriever passes. Good functional clinical outcome (mRS ≤ 2) at 90-day follow up was similar in TO and SO patients (58% vs 59% respectively). General anesthesia (GA) was associated with good functional outcome whereas hemorrhage in the infarcted tissue, lower mTICI score and history of smoking were associated with poor outcome. Conclusions The risk of sICH was increased in patients with diabetes mellitus and those with extra stent-retriever attempts. Functional clinical outcomes in patients with TO were comparable to patients with SO.

• Nome, Terje; Enriquez, Brian Anthony; Nome, Cecilie; Tennøe, Bjørn; Lund, Christian & Skjelland, Mona [Vis alle 8 forfattere av denne artikkelen] (2023). Clinical outcome after thrombectomy in patients with MeVO stroke: importance of clinical and technical factors. Journal of Neurology. ISSN 0340-5354. 1(2), s. 877–886. doi: 10.1007/s00415-023-12025-1. Fulltekst i vitenarkiv Vis sammendrag

  Background and aims Whereas high-level evidence has been proven for safety and efficacy of endovascular treatment (EVT) in large vessel occlusion (LVO) stroke, the evidence for EVT in medium vessel occlusion (MeVO) in both sexes and different age groupremains to be answered. The aim of this study was to evaluate the importance of clinical and technical parameters, focusing on sex, age and EVT procedural factors, on functional outcome in primary MeVO (pMeVO) strokes. Methods 144 patients with pMeVO in the MCA territory from the Oslo Acute Reperfusion Stroke Study (OSCAR) were included. Clinical and radiological data were collected including 90-day mRS follow-up. Results Successful reperfusion with modified thrombolysis in cerebral infarction (mTICI) ≥ 2b was achieved in 123 patients (84%). Good functional outcome (mRS ≤ 2) at 90-day follow-up was achieved in 84 patients (61.8%). Two or more passes with stent retriever was associated with increased risk of SAH, poor mTICI and poor functional outcome. In average, women had 62 min longer ictus to recanalization time compared to men. Age over 80 years was significantly associated with poor outcome and death. Conclusion In pMeVO patients, TICI score and number of passes with stent retriever were the main technical factors predicting mRS ≤ 2. Good clinical outcome occurred almost twice as often in patients under 80 years of age compared to patients over 80 years. Women with MeVO strokes had significant longer time from ictus to recanalization; however, this did not affect the clinical outcome.

• Gonzalez, Alba; Nome, Cecilie; Bendiksen, Bård Andre; Sjaastad, Ivar; Zhang, Lili & Aleksandersen, Mona [Vis alle 9 forfattere av denne artikkelen] (2020). Assessment of cardiac structure and function in a murine model of temporal lobe epilepsy. Epilepsy Research. ISSN 0920-1211. 161, s. 1–7. doi: 10.1016/j.eplepsyres.2020.106300. Fulltekst i vitenarkiv Vis sammendrag

  Sudden unexpected death in epilepsy (SUDEP) is a significant cause of premature seizure-related death. An association between SUDEP and cardiac remodeling has been suggested. However, whether SUDEP is a direct consequence of acute or recurrent seizures is unsettled. The purpose of this study was to evaluate the impact of status epilepticus (SE) and chronic seizures on myocardial structure and function. We used the intracortical kainate injection model of temporal lobe epilepsy to elicit SE and chronic epilepsy in mice. In total, 24 C57/BL6 mice (13 kainate, 11 sham) were studied 2 and 30 days post-injection. Cardiac structure and function were investigated in-vivo with a 9.4 T MRI, electrocardiography (ECG), echocardiography, and histology [Haematoxylin/Eosin (HE) and Martius Scarlet Blue (MSB)] for staining of collagen proliferation and fibrin accumulation. In conclusion, we did not detect any significant changes in cardiac structure and function neither in mice 2 days nor 30 days post-injection.

• Berger, Toni; Vigeland, Magnus Dehli; Hjorthaug, Hanne Sagsveen; Nome, Cecilie; Taubøll, Erik & Selmer, Kaja Kristine [Vis alle 7 forfattere av denne artikkelen] (2020). Differential Glial Activation in Early Epileptogenesis—Insights From Cell-Specific Analysis of DNA Methylation and Gene Expression in the Contralateral Hippocampus. Frontiers in Neurology. 11. doi: 10.3389/fneur.2020.573575. Fulltekst i vitenarkiv Vis sammendrag

  Background and Aims: Morphological changes in mesial temporal lobe epilepsy with hippocampal sclerosis (mTLE-HS) are well-characterized. Yet, it remains elusive whether these are a consequence of seizures or originate from a hitherto unknown underlying pathology. We recently published data on changes in gene expression and DNA methylation in the ipsilateral hippocampus (ILH) using the intracortical kainate mouse model of mTLE-HS. In order to explore the effects of epileptic activity alone and also to further disentangle what triggers morphological alterations, we investigated glial and neuronal changes in gene expression and DNA methylation in the contralateral hippocampus (CLH). Methods: The intracortical kainic acid mouse model of mTLE-HS was used to elicit status epilepticus. Hippocampi contralateral to the injection site from eight kainate-injected and eight sham mice were extracted and shock frozen at 24 h post-injection. Glial and neuronal nuclei were sorted by flow cytometry. Alterations in gene expression and DNA methylation were assessed using reduced representation bisulfite sequencing and RNA sequencing. The R package edgeR was used for statistical analysis. Results: The CLH featured substantial, mostly cell-specific changes in both gene expression and DNA methylation in glia and neurons. While changes in gene expression overlapped to a great degree between CLH and ILH, alterations in DNA methylation did not. In the CLH, we found a significantly lower number of glial genes up- and downregulated compared to previous results from the ILH. Furthermore, several genes and pathways potentially involved in anti-epileptogenic effects were upregulated in the CLH. By comparing gene expression data from the CLH to previous results from the ILH (featuring hippocampal sclerosis), we derive potential upstream targets for epileptogenesis, including glial Cox2 and Cxcl10. Conclusion: Despite the absence of morphological changes, the CLH displays substantial changes in gene expression and DNA methylation. We find that gene expression changes related to potential anti-epileptogenic effects seem to dominate compared to the pro-epileptogenic effects in the CLH and speculate whether this imbalance contributes to prevent morphological alterations like neuronal death and reactive gliosis.

• Berger, Toni; Vigeland, Magnus Dehli; Hjorthaug, Hanne Sagsveen; Etholm, Lars; Nome, Cecilie & Taubøll, Erik [Vis alle 8 forfattere av denne artikkelen] (2019). Neuronal and glial DNA methylation and gene expression changes in early epileptogenesis. PLOS ONE. 14:e0226575(12), s. 1–32. doi: 10.1371/journal.pone.0226575. Fulltekst i vitenarkiv Vis sammendrag

  Background and aims Mesial Temporal Lobe Epilepsy is characterized by progressive changes of both neurons and glia, also referred to as epileptogenesis. No curative treatment options, apart from surgery, are available. DNA methylation (DNAm) is a potential upstream mechanism in epileptogenesis and may serve as a novel therapeutic target. To our knowledge, this is the first study to investigate epilepsy-related DNAm, gene expression (GE) and their relationship, in neurons and glia. Methods We used the intracortical kainic acid injection model to elicit status epilepticus. At 24 hours post injection, hippocampi from eight kainic acid- (KA) and eight saline-injected (SH) mice were extracted and shock frozen. Separation into neurons and glial nuclei was performed by flow cytometry. Changes in DNAm and gene expression were measured with reduced representation bisulfite sequencing (RRBS) and mRNA-sequencing (mRNAseq). Statistical analyses were performed in R with the edgeR package. Results We observed fulminant DNAm- and GE changes in both neurons and glia at 24 hours after initiation of status epilepticus. The vast majority of these changes were specific for either neurons or glia. At several epilepsy-related genes, like HDAC11, SPP1, GAL, DRD1 and SV2C, significant differential methylation and differential gene expression coincided. Conclusion We found neuron- and glia-specific changes in DNAm and gene expression in early epileptogenesis. We detected single genetic loci in several epilepsy-related genes, where DNAm and GE changes coincide, worth further investigation. Further, our results may serve as an information source for neuronal and glial alterations in both DNAm and GE in early epileptogenesis.

• Bjørke, Agnes Balint; Nome, Cecilie; Falk, Ragnhild Sørum; Gjerstad, Leif; Taubøll, Erik & Heuser, Kjell (2018). Evaluation of long-term antiepileptic drug use in patients with temporal lobe epilepsy: Assessment of risk factors for drug resistance and polypharmacy. Seizure. ISSN 1059-1311. 61, s. 63–70. doi: 10.1016/j.seizure.2018.07.011. Fulltekst i vitenarkiv
• Heuser, Kjell; Nome, Cecilie; Pettersen, Klas; Åbjørsbråten, Knut Sindre; Jensen, Vidar & Tang, Wannan [Vis alle 10 forfattere av denne artikkelen] (2018). Ca2+ signals in astrocytes facilitate spread of epileptiform activity. Cerebral Cortex. ISSN 1047-3211. 28(11), s. 4036–4048. doi: 10.1093/cercor/bhy196. Fulltekst i vitenarkiv Vis sammendrag

  Epileptic seizures are associated with increased astrocytic Ca2+ signaling, but the fine spatiotemporal kinetics of the ictal astrocyte–neuron interplay remains elusive. By using 2-photon imaging of awake head-fixed mice with chronic hippocampal windows we demonstrate that astrocytic Ca2+ signals precede neuronal Ca2+ elevations during the initial bout of kainate-induced seizures. On average, astrocytic Ca2+ elevations preceded neuronal activity in CA1 by about 8 s. In subsequent bouts of epileptic seizures, astrocytes and neurons were activated simultaneously. The initial astrocytic Ca2+ elevation was abolished in mice lacking the type 2 inositol-1,4,5-trisphosphate-receptor (Itpr2−/−). Furthermore, we found that Itpr2−/− mice exhibited 60% less epileptiform activity compared with wild-type mice when assessed by telemetric EEG monitoring. In both genotypes we also demonstrate that spreading depression waves may play a part in seizure termination. Our findings imply a role for astrocytic Ca2+ signals in ictogenesis.

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