{"title":"The relationship between sleep and innate immunity.","authors":"Yoonkyung Lee, Kyung-Il Park","doi":"10.47936/encephalitis.2024.00017","DOIUrl":"10.47936/encephalitis.2024.00017","url":null,"abstract":"<p><p>Sleep regulates inflammatory responses, and the innate immune system affects sleep. Interleukin-1 beta, tumor necrosis factor alpha, growth hormone-releasing hormone, prolactin, and nitric oxide are somnogenic substances. Sleep deprivation, such as chronic insomnia or obstructive sleep apnea, affects cytokine production, glial function, natural killer cell activity, and inflammasome function. This review will discuss the relationship between sleep and innate immunity.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"69-75"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11472141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141072454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Understanding epileptogenesis from molecules to network alteration.","authors":"Kyung-Il Park","doi":"10.47936/encephalitis.2024.00038","DOIUrl":"10.47936/encephalitis.2024.00038","url":null,"abstract":"<p><p>Epilepsy is characterized by recurrent seizures. Following an initial insult, a latent period precedes the onset of spontaneous seizures, a process referred to as epileptogenesis. This period plays a critical role in halting the progression toward epilepsy before the onset of abnormal molecular and network alterations. In this study, the fundamental concepts of epileptogenesis as well as the associated molecular and cellular targets are reviewed.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"47-54"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11237188/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141422084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sleep and neuroimmunology: a narrative review.","authors":"Jin Myoung Seok, Kwang Ik Yang","doi":"10.47936/encephalitis.2024.00024","DOIUrl":"10.47936/encephalitis.2024.00024","url":null,"abstract":"<p><p>Numerous neuroimmunological disorders present with sleep-related symptoms. The identification of novel autoantibodies introduces new clinical categories in autoimmune diseases of the central nervous system and generates interest in the dynamic interaction between sleep and the immune system. In this review, the complex relationship among sleep, immune regulation, and neuroimmunological disorders was examined with emphasis on the vital role of sleep in modulating immune function and its influence on these conditions, This relationship emphasizes the importance of assessments and management of sleep quality in the treatment approaches for neuroimmunological disorders.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"55-61"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11237187/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141447763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hussein Algahtani, Bader Shirah, Hussam A Jamaluddin, Nawal Abdelghaffar
{"title":"Insights into adjunctive corticosteroid therapy in fulminant herpes simplex virus encephalitis: case analysis with contrasting outcomes.","authors":"Hussein Algahtani, Bader Shirah, Hussam A Jamaluddin, Nawal Abdelghaffar","doi":"10.47936/encephalitis.2024.00031","DOIUrl":"10.47936/encephalitis.2024.00031","url":null,"abstract":"<p><p>Herpes simplex virus (HSV) encephalitis, predominantly caused by HSV-1, presents with significant morbidity and mortality challenges. This research investigates the particular role of adjunctive corticosteroid therapy in fulminant HSV encephalitis through in-depth analyses of two contrasting cases. Corticosteroids show potential benefits to improve an exaggerated immune response and limit viral dissemination within the brain. Daily assessments and frequent neuroimaging, particularly using magnetic resonance imaging, aid in the management of fulminant cases. Although existing evidence relies on limited case series and retrospective comparisons, the results of the present study emphasize the necessity for large-scale controlled trials to establish definitive guidelines. The discretion of the treating neurologist governs the decision to implement corticosteroids, emphasizing the imperative need for continued research and evidence-based strategies for this challenging neurological condition.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":"4 3","pages":"62-68"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11237186/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141565311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chronic social stress in early life can predispose mice to antisocial maltreating behavior.","authors":"Daejong Jeon, Sangwoo Kim, Sang Kun Lee, Kon Chu","doi":"10.47936/encephalitis.2023.00199","DOIUrl":"10.47936/encephalitis.2023.00199","url":null,"abstract":"<p><strong>Purpose: </strong>In our previous study, we developed an assay system to evaluate antisocial maltreating behavior of conspecific mice using a perpetrator-victim paradigm. We also generated a mouse model for the maltreating behavior by mimicking child maltreatment or abuse. Here, we further investigate the antisocial behavior using anti-aggressive and antipsychotic drugs.</p><p><strong>Methods: </strong>Model mice sequentially subjected to maternal separation (MS), social defeat (SD), and social isolation (SI) in that order (MS/SD/SI model) were subjected to a maltreating behavioral task. The MS/SD/SI mice were treated with oxytocin (OXY), clozapine (CLZ), haloperidol (HAL), and 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT). Western blotting and enzyme-linked immunosorbent assay were used for protein analysis.</p><p><strong>Results: </strong>A substantial portion of the MS/SD/SI model mice (46% of males and 40% of females) showed a higher number of nose pokes than the control. OXY or 8-OH-DPAT treatment reduced the high number of nose pokes by the MS/SD/SI mice, whereas HAL increased it. CLZ did not affect the number of nose pokes by the MS/SD/SI mice. Interestingly, although the OXY level in the MS/SD/SI mice was similar to that in the control, the amount of OXY receptor was lower in the MS/SD/SI mice. The amount of 5-HT1A receptor was also decreased in the MS/SD/SI mice.</p><p><strong>Conclusion: </strong>Chronic social stress in childhood might predispose a mouse to antisocial behavior. Our maltreating behavior assay system, including the MS/SD/SI model, is a good animal system for research on and drug screening for brain disorders associated with antisocial or psychotic behavior.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"23-30"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140041014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ji-Yoon An, Soo-Im Jang, Seul-Gi Choi, Sae-Nal Lee, Eun-Ja Lee, Kwang-Ki Kim, Hang-Rai Kim
{"title":"Myelin oligodendrocyte glycoprotein antibody-associated disease presenting as unilateral cerebral cortical encephalitis: a case report.","authors":"Ji-Yoon An, Soo-Im Jang, Seul-Gi Choi, Sae-Nal Lee, Eun-Ja Lee, Kwang-Ki Kim, Hang-Rai Kim","doi":"10.47936/encephalitis.2023.00234","DOIUrl":"https://doi.org/10.47936/encephalitis.2023.00234","url":null,"abstract":"<p><p>Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) is an autoimmune disorder with diverse clinical manifestations including myelitis, meningitis, encephalitis, and optic neuritis. MOGAD rarely presents with unilateral cerebral cortical encephalitis (CCE), rendering the diagnosis difficult in these cases. Furthermore, MOGAD is frequently accompanied by other autoimmune diseases such as thyroid disease or inflammatory bowel disease. Herein, we report a case of unilateral CCE with positive anti-myelin oligodendrocyte glycoprotein (MOG) antibodies. In addition, our patient presented with systemic symptoms as well as neurologic symptoms and was finally diagnosed with ulcerative colitis (UC). A 60-year-old female was admitted to the hospital with an acute onset of headache and fever. Neurological examination revealed left-sided homonymous hemianopsia with intermittent visual hallucinations as flickering red-circular spots in the left visual field. Brain magnetic resonance imaging showed focal hyperintensities and enhancement in the right temporo-parieto-occipital cortex. Electroencephalography indicated a focal seizure in the right occipital cortex. After the administration of an antiepileptic drug, the patient showed clinical and radiological improvements. She tested positive for serum anti-MOG antibodies and was diagnosed with anti-MOG-associated unilateral CCE. However, the gastrointestinal symptoms persisted, thus, a sigmoidoscopy was performed. The patient was diagnosed with comorbid UC. Steroids were administered to treat the UC and the gastrointestinal symptoms improved. To the best of our knowledge, this is the first case of MOGAD presenting as a unilateral CCE in Korea. This case highlights the clinical phenotypes of MOGAD and the need to assess comorbid autoimmune diseases in patients with MOGAD.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":"4 2","pages":"35-39"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007549/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140868037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoonjeong Na, Jung-Ju Lee, Byung Kun Kim, Woong-Woo Lee, Yong Soo Kim, Ilhan Yoo
{"title":"Herpes simplex encephalitis initially presenting without fever or cerebrospinal fluid pleocytosis and with typical neuroimaging findings: a case report.","authors":"Yoonjeong Na, Jung-Ju Lee, Byung Kun Kim, Woong-Woo Lee, Yong Soo Kim, Ilhan Yoo","doi":"10.47936/encephalitis.2023.00220","DOIUrl":"10.47936/encephalitis.2023.00220","url":null,"abstract":"<p><p>Herpes simplex encephalitis (HSE) is a common viral encephalitis that can be fatal if not adequately treated. Fever, cerebrospinal fluid (CSF) pleocytosis, and typical neuroimaging findings are commonly observed in HSE cases. We encountered a patient with HSE who did not exhibit these classic clinical features. A 63-year-old male presented with his first-ever seizure. Fever did not develop until the fourth day of admission, and neither neuroimaging nor CSF analysis revealed abnormalities. Under suspicion of autoimmune encephalitis, methylprednisolone was administered. Subsequently, when the patient developed fever, a follow-up neuroimaging study was performed and revealed abnormalities consistent with HSE. The patient was promptly treated with acyclovir, which led to a full recovery. Diagnosing HSE in patients who present without fever or CSF pleocytosis and with typical neuroimaging findings poses a challenge. Therefore, prior to initiating immunosuppressive treatment, it is crucial to closely observe patients and to conduct follow-up tests, including neuroimaging and CSF analysis.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"31-34"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007550/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140041015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soo Hyun Ahn, Seon-Jae Ahn, Seung Ae Kim, Han Sang Lee, Kon Chu
{"title":"Eosinophilic meningoencephalitis successfully treated with glucocorticoids and intravenous immunoglobulin: a case report.","authors":"Soo Hyun Ahn, Seon-Jae Ahn, Seung Ae Kim, Han Sang Lee, Kon Chu","doi":"10.47936/encephalitis.2024.00010","DOIUrl":"10.47936/encephalitis.2024.00010","url":null,"abstract":"<p><p>Eosinophilic meningoencephalitis is a rare inflammatory condition of the central nervous system. As a limited number of cases has been reported, debate remains on the optimal treatment. We present a case of idiopathic eosinophilic meningoencephalitis successfully treated with glucocorticoids and intravenous immunoglobulin (IVIG). After extensive evaluation to rule out other possible causes, the patient was treated with intravenous (IV) dexamethasone and showed significant improvement within a few days. However, neurologic impairment persisted, and follow-up lumbar puncture results showed only a mild decrease in pleocytosis. Even after an additional 5 days of IV methylprednisolone, cerebrospinal fluid (CSF) pleocytosis persisted, and brain magnetic resonance imaging (MRI) showed an increase in enhanced lesions, implying persistent neuroinflammation. The patient was maintained on high-dose oral prednisolone for 2 months, and additional immune-modulatory effects were treated with IVIG. Follow-up MRI at 2 months showed a significant decrease in the extent of multiple enhanced lesions and a normalized CSF profile. The patient was maintained on regular maintenance doses of IVIG for an additional 6 months without any neurologic signs or symptoms. Inflammation is the key pathophysiology underlying neurological damage in eosinophilic meningoencephalitis. A literature review revealed that corticosteroid treatment is the only anti-inflammatory treatment used in cases of idiopathic meningoencephalitis, resulting in sufficient response in most patients but only partial response or death in a few cases. This is the first case report of IVIG use in idiopathic eosinophilic meningoencephalitis, suggesting the possibility of a new treatment modality for refractory cases.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"40-46"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007548/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140308164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"COVID-19-related posterior reversible encephalopathy syndrome: insights from a clinical case.","authors":"Reza Dehdab, Saif Afat","doi":"10.47936/encephalitis.2023.00115","DOIUrl":"10.47936/encephalitis.2023.00115","url":null,"abstract":"<p><p>In the present case report, a 50-year-old female presented with hemiparesis and blurred vision and was subsequently diagnosed with posterior reversible encephalopathy syndrome (PRES) associated with coronavirus disease 2019 (COVID-19). Magnetic resonance imaging revealed cortico-subcortical edema with hyperintensities bilaterally in the frontoparietal and bi-occipital regions. Although PRES is a neurotoxic disorder that typically affects white matter of the brain and often is associated with hypertension, renal failure, and autoimmune disorders, recent studies have suggested that COVID-19 increases the risk of PRES. This case report presents a unique instance of COVID-19-related PRES. Unlike most previously reported cases occurring during the acute phase of severe COVID-19, our patient experienced PRES during the recovery phase with mild initial symptoms, such as fatigue and mild fever. The article discusses the pathophysiology of PRES, the potential mechanisms by which COVID-19 leads to PRES, and the treatment and outcome of the patient.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"18-22"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007401/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138489276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The association between autoimmune encephalitis mediated by N-methyl-ᴅ-aspartate receptor autoantibodies and COVID-19: a systematic review.","authors":"Ahmad Sawalha, Huda Alkilani, Rami Abdelaziz","doi":"10.47936/encephalitis.2023.00171","DOIUrl":"10.47936/encephalitis.2023.00171","url":null,"abstract":"<p><p>Neurological complications related to coronavirus disease 2019 (COVID-19) infection have been increasingly reported. One of the most serious neurological complications is encephalitis, which could be due either to direct viral invasion or an immune-mediated inflammatory reaction. In this study, we conducted a systematic review of reported cases of autoimmune encephalitis mediated by N-methyl-ᴅ-aspartate receptor antibodies in conjunction with or after diagnosis of COVID-19 infection.</p>","PeriodicalId":72904,"journal":{"name":"Encephalitis (Seoul, Korea)","volume":" ","pages":"3-10"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11007402/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138833342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}