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Rider F, Turchinets A, Druzhkova T, Kustov G, Guekht A, Gulyaeva N. Dissimilar Changes in Serum Cortisol after Epileptic and Psychogenic Non-Epileptic Seizures: A Promising Biomarker in the Differential Diagnosis of Paroxysmal Events? Int J Mol Sci 2024; 25:7387. [PMID: 39000494 PMCID: PMC11242564 DOI: 10.3390/ijms25137387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 06/09/2024] [Accepted: 06/17/2024] [Indexed: 07/16/2024] Open
Abstract
The hypothalamic-pituitary-adrenal axis is known to be involved in the pathogenesis of epilepsy and psychiatric disorders. Epileptic seizures (ESs) and psychogenic non-epileptic seizures (PNESs) are frequently differentially misdiagnosed. This study aimed to evaluate changes in serum cortisol and prolactin levels after ESs and PNESs as possible differential diagnostic biomarkers. Patients over 18 years with ESs (n = 29) and PNESs with motor manifestations (n = 45), captured on video-EEG monitoring, were included. Serum cortisol and prolactin levels as well as hemograms were assessed in blood samples taken at admission, during the first hour after the seizure, and after 6, 12, and 24 h. Cortisol and prolactine response were evident in the ES group (but not the PNES group) as an acute significant increase within the first hour after seizure. The occurrence of seizures in patients with ESs and PNESs demonstrated different circadian patterns. ROC analysis confirmed the accuracy of discrimination between paroxysmal events based on cortisol response: the AUC equals 0.865, with a prediction accuracy at the cutoff point of 376.5 nmol/L 0.811 (sensitivity 86.7%, specificity 72.4%). Thus, assessments of acute serum cortisol response to a paroxysmal event may be regarded as a simple, fast, and minimally invasive laboratory test contributing to differential diagnosis of ESs and PNESs.
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Affiliation(s)
- Flora Rider
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
| | - Alexander Turchinets
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
| | - Tatyana Druzhkova
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
| | - Georgii Kustov
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
| | - Alla Guekht
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Natalia Gulyaeva
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow 107076, Russia
- Laboratory of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow 117485, Russia
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Wen W, Zhou J, Zhan C, Wang J. Microglia as a Game Changer in Epilepsy Comorbid Depression. Mol Neurobiol 2024; 61:4021-4037. [PMID: 38048030 DOI: 10.1007/s12035-023-03810-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 11/16/2023] [Indexed: 12/05/2023]
Abstract
As one of the most common neurological diseases, epilepsy is often accompanied by psychiatric disorders. Depression is the most universal comorbidity of epilepsy, especially in temporal lobe epilepsy (TLE). Therefore, it is urgently needed to figure out potential mechanisms and the optimization of therapeutic strategies. Microglia play a pivotal role in the coexistent relationship between epilepsy and depression. Activated microglia released cytokines like IL-6 and IL-1β, orchestrating neuroinflammation especially in the hippocampus, worsening both depression and epilepsy. The decrease of intracellular K+ is a common part in various molecular changes. The P2X7-NLRP3-IL-1β is a major inflammatory pathway that disrupts brain network. Extra ATP and CX3CL1 also lead to neuronal excitotoxicity and blood-brain barrier (BBB) disruption. Regulating neuroinflammation aiming at microglia-related molecules is capable of suspending the vicious mutual aggravating circle of epilepsy and depression. Other overlaps between epilepsy and depression lie in transcriptomic, neuroimaging, diagnosis and treatment. Hippocampal sclerosis (HS) and amygdala enlargement (AE) may be the underlying macroscopic pathological changes according to current studies. Extant evidence shows that cognitive behavioral therapy (CBT) and antidepressants like selective serotonin-reuptake inhibitors (SSRIs) are safe, but the effect is limited. Improvement in depression is likely to reduce the frequency of seizure. More comprehensive experiments are warranted to better understand the relationship between them.
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Affiliation(s)
- Wenrong Wen
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou Avenue North, Guangzhou, 1838, Guangdong Province, China
- The First Clinical Medicine College, Southern Medical University, Guangzhou, Guangdong Province, China
- Neural Networks Surgery Team, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Jingsheng Zhou
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou Avenue North, Guangzhou, 1838, Guangdong Province, China
- The First Clinical Medicine College, Southern Medical University, Guangzhou, Guangdong Province, China
- Neural Networks Surgery Team, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Chang'an Zhan
- School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Jun Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou Avenue North, Guangzhou, 1838, Guangdong Province, China.
- The First Clinical Medicine College, Southern Medical University, Guangzhou, Guangdong Province, China.
- Neural Networks Surgery Team, Southern Medical University, Guangzhou, Guangdong Province, China.
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Liu GY, Fu FJ, Chou YX, Ye MS, Ouyang YL, Yan MD, Pan L, Li WP, Xie W. Frontiers and hotspots in comorbid epilepsy and depression: a bibliometric analysis from 2003 to 2023. Front Neurol 2024; 15:1413582. [PMID: 38974685 PMCID: PMC11224553 DOI: 10.3389/fneur.2024.1413582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 06/10/2024] [Indexed: 07/09/2024] Open
Abstract
Background Epilepsy ranks among the most common neurological disorders worldwide, frequently accompanied by depression as a prominent comorbidity. This study employs bibliometric analysis to reveal the research of comorbid epilepsy and depression over the past two decades, aiming to explore trends and contribute insights to ongoing investigations. Methods We conducted a comprehensive search on the Web of Science Core Collection database and downloaded relevant publications on comorbid epilepsy and depression published from 2003 to 2023. VOSviewer and CiteSpace were mainly used to analyze the authors, institutions, countries, publishing journals, reference co-citation patterns, keyword co-occurrence, keyword clustering, and other aspects to construct a knowledge atlas. Results A total of 5,586 publications related to comorbid epilepsy and depression were retrieved, with a general upward trend despite slight fluctuations in annual publications. Publications originated from 121 countries and 636 institutions, with a predominant focus on clinical research. The United States led in productivity (1,529 articles), while Melbourne University emerged as the most productive institution (135 articles). EPILEPSY & BEHAVIOR was the journal with the highest publication output (1,189 articles) and citation count. Keyword analysis highlighted emerging trends, including "recognitive impairment" and "mental health," indicating potential future research hotspots and trends. Conclusion This study is one of the first to perform a bibliometric analysis of the 20-year scientific output of comorbid epilepsy and depression. While research has trended upwards, ambiguity in pathogenesis and the absence of standardized diagnostic guidelines remain concerning. Our analysis offers valuable guidance for researchers, informing that this might be a strong area for future collaborations.
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Affiliation(s)
- Gui-Yu Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Fan-Jia Fu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Ying-Xin Chou
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Ming-Sha Ye
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yi-Lin Ouyang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Ming-De Yan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Lei Pan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Wei-Peng Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
- Department of Neurology, Hospital of Integrated Traditional Chinese and Western Medicine, Southern Medical University, Guangzhou, China
| | - Wei Xie
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
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Soares AR, Garcia-Rivas V, Fai C, Thomas MA, Zheng X, Picciotto MR, Mineur YS. Role of microglia in stress-induced alcohol intake in female and male mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.05.597614. [PMID: 38895217 PMCID: PMC11185719 DOI: 10.1101/2024.06.05.597614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Rates of alcohol use disorder (AUD) have escalated in recent years, with a particular increase among women. Women are more susceptible to stress-induced alcohol drinking, and preclinical data suggest that stress can increase alcohol intake in female rodents; however, a comprehensive understanding of sex-specific neurobiological substrates underlying this phenomenon is still emerging. Microglia, the resident macrophages of the brain, are essential for reshaping neuronal processes, and microglial activity contributes to overall neuronal plasticity. We investigated microglial dynamics and morphology in limbic brain structures of male and female mice following exposure to stress, alcohol or both challenges. In a modified paradigm of intermittent binge drinking (repeated "drinking in the dark"), we determined that female, but not male, mice increased their alcohol consumption after exposure to a physical stressor and re-exposure trials in the stress-paired context. Ethanol (EtOH) drinking and stress altered a number of microglial parameters, including overall number, in subregions of the amygdala and hippocampus, with effects that were somewhat more pronounced in female mice. We used the CSF1R antagonist PLX3397 to deplete microglia in female mice to determine whether microglia contribute to stress-induced escalation of EtOH intake. We observed that microglial depletion attenuated stress-induced alcohol intake with no effect in the unstressed group. These findings suggest that microglial activity can contribute to alcohol intake under stressful conditions, and highlight the importance of evaluating sex-specific mechanisms that could result in tailored interventions for AUD in women.
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Bian X, Yang W, Lin J, Jiang B, Shao X. Hypothalamic-Pituitary-Adrenal Axis and Epilepsy. J Clin Neurol 2024; 20:131-139. [PMID: 38330420 PMCID: PMC10921057 DOI: 10.3988/jcn.2023.0308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/28/2023] [Accepted: 11/07/2023] [Indexed: 02/10/2024] Open
Abstract
Epilepsy is a recurrent, transient seizure disorder of the nervous system that affects the intellectual development, life and work, and psychological health of patients. People with epilepsy worldwide experience great suffering. Stressful stimuli such as infection, mental stress, and sleep deprivation are important triggers of epilepsy, and chronic stressful stimuli can lead to frequent seizures and comorbidities. The hypothalamic-pituitary-adrenal (HPA) axis is the most important system involved in the body's stress response, and dysfunction thereof is thought to be associated with core epilepsy symptoms and related psychopathology. This article explores the intrinsic relationships of corticotropin-releasing hormone, adrenocorticotropic hormone, and glucocorticoids with epilepsy in order to reveal the role of the HPA axis in the pathogenesis of epilepsy. We hope that this information will yield future possible directions and ideas for fully understanding the pathogenesis of epilepsy and developing antiepileptic drugs.
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Affiliation(s)
- Xueying Bian
- Department of Pediatrics, Shaoxing Peoples' Hospital, The First Affiliated Hospital of Shaoxing University, Shaoxing, China
| | - Wenxian Yang
- Department of Pediatrics, Yiwu Central Hospital, Yiwu, China
| | - Jiannan Lin
- Department of Pediatrics, The Second Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Biao Jiang
- Department of Pediatrics, Shaoxing Peoples' Hospital, The First Affiliated Hospital of Shaoxing University, Shaoxing, China
| | - Xiaoli Shao
- Department of Pediatrics, Shaoxing Peoples' Hospital, The First Affiliated Hospital of Shaoxing University, Shaoxing, China.
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He H, He H, Mo L, You Z, Zhang J. Priming of microglia with dysfunctional gut microbiota impairs hippocampal neurogenesis and fosters stress vulnerability of mice. Brain Behav Immun 2024; 115:280-294. [PMID: 37914097 DOI: 10.1016/j.bbi.2023.10.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 10/26/2023] [Accepted: 10/29/2023] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND Mental disorders may be involved in neuroinflammatory processes that are triggered by gut microbiota. How gut microbiota influence microglia-mediated sensitivity to stress remains unclear. Here we explored in an animal model of depression whether disruption of the gut microbiome primes hippocampal microglia, thereby impairing neurogenesis and sensitizing to stress. METHODS Male C57BL/6J mice were exposed to chronic unpredictable mild stress (CUMS) for 4 weeks, and effects on gut microbiota were assessed using 16S rRNA sequencing. Fecal microbiota was transplanted from control or CUMS mice into naïve animals. The depression-like behaviors of recipients were evaluated in a forced swimming test and sucrose preference test. The morphology and phenotype of microglia in the hippocampus of recipients were examined using immunohistochemistry, quantitative PCR, and enzyme-linked immunosorbent assays. The recipients were treated with lipopolysaccharide or chronic stress exposure, and effects were evaluated on behavior, microglial responses and hippocampal neurogenesis. Finally, we explored the ability of minocycline to reverse the effects of CUMS on hippocampal neurogenesis and stress sensitivity in recipients. RESULTS CUMS altered the gut microbiome, leading to higher relative abundance of some bacteria (Helicobacter, Bacteroides, and Desulfovibrio) and lower relative abundance of some bacteria (Lactobacillus, Bifidobacterium, and Akkermansia). Fecal microbiota transplantation from CUMS mice to naïve animals induced microglial priming in the dentate gyrus of recipients. This microglia showed hyper-ramified morphology, and became more sensitive to LPS challenge or chronic stress, which characterized by more significant morphological changes and inflammatory responses, as well as impaired hippocampal neurogenesis and increased depressive-like behaviors. Giving minocycline to recipients reversed these effects of fecal transplantation. CONCLUSIONS These findings suggest that gut microbiota from stressed animals can induce microglial priming in the dentate gyrus, which is associated with a hyper-immune response to stress and impaired hippocampal neurogenesis. Remodeling the gut microbiome or inhibiting microglial priming may be strategies to reduce sensitivity to stress.
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Affiliation(s)
- Hui He
- Center of Psychosomatic Medicine, Sichuan Provincial Center for Mental Health, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Haili He
- Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Li Mo
- Center of Psychosomatic Medicine, Sichuan Provincial Center for Mental Health, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Zili You
- Center of Psychosomatic Medicine, Sichuan Provincial Center for Mental Health, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Jinqiang Zhang
- Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China.
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7
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Shpak AA, Rider FK, Druzhkova TA, Zhanina MY, Popova SB, Guekht AB, Gulyaeva NV. Reduced Levels of Lacrimal Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Patients with Focal Epilepsy and Focal Epilepsy with Comorbid Depression: A Biomarker Candidate. Int J Mol Sci 2023; 24:16818. [PMID: 38069144 PMCID: PMC10705972 DOI: 10.3390/ijms242316818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/21/2023] [Accepted: 11/24/2023] [Indexed: 12/18/2023] Open
Abstract
Our previous studies showed that in patients with brain diseases, neurotrophic factors in lacrimal fluid (LF) may change more prominently than in blood serum (BS). Since glial cell line-derived neurotrophic factor (GDNF) is involved in the control of neuronal networks in an epileptic brain, we aimed to assess the GDNF levels in LF and BS as well as the BDNF and the hypothalamic-pituitary-adrenocortical and inflammation indices in BS of patients with focal epilepsy (FE) and epilepsy and comorbid depression (FE + MDD) and to compare them with those of patients with major depressive disorder (MDD) and healthy controls (HC). GDNF levels in BS were similar in patients and HC and higher in FE taking valproates. GDNF levels in LF were significantly lower in all patient groups compared to controls, and independent of drugs used. GDNF concentrations in LF and BS positively correlated in HC, but not in patient groups. BDNF level was lower in BS of patients compared with HC and higher in FE + MDD taking valproates. A reduction in the GDNF level in LF might be an important biomarker of FE. Logistic regression models demonstrated that the probability of FE can be evaluated using GDNF in LF and BDNF in BS; that of MDD using GDNF in LF and cortisol and TNF-α in BS; and that of epilepsy with MDD using GDNF in LF and TNF-α and BDNF in BS.
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Affiliation(s)
- Alexander A. Shpak
- The S. Fyodorov Eye Microsurgery Federal State Institution, 127486 Moscow, Russia;
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
| | - Flora K. Rider
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
| | - Tatiana A. Druzhkova
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
| | - Marina Y. Zhanina
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117465 Moscow, Russia
| | - Sofya B. Popova
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
| | - Alla B. Guekht
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
| | - Natalia V. Gulyaeva
- Moscow Research and Clinical Center for Neuropsychiatry, Moscow Healthcare Department, 115419 Moscow, Russia; (F.K.R.); (T.A.D.); (M.Y.Z.); (S.B.P.); (A.B.G.)
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117465 Moscow, Russia
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Jhaveri DJ, McGonigal A, Becker C, Benoliel JJ, Nandam LS, Soncin L, Kotwas I, Bernard C, Bartolomei F. Stress and Epilepsy: Towards Understanding of Neurobiological Mechanisms for Better Management. eNeuro 2023; 10:ENEURO.0200-23.2023. [PMID: 37923391 PMCID: PMC10626502 DOI: 10.1523/eneuro.0200-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/03/2023] [Accepted: 09/20/2023] [Indexed: 11/07/2023] Open
Abstract
Stress has been identified as a major contributor to human disease and is postulated to play a substantial role in epileptogenesis. In a significant proportion of individuals with epilepsy, sensitivity to stressful events contributes to dynamic symptomatic burden, notably seizure occurrence and frequency, and presence and severity of psychiatric comorbidities [anxiety, depression, posttraumatic stress disorder (PTSD)]. Here, we review this complex relationship between stress and epilepsy using clinical data and highlight key neurobiological mechanisms including the hypothalamic-pituitary-adrenal (HPA) axis dysfunction, altered neuroplasticity within limbic system structures, and alterations in neurochemical pathways such as brain-derived neurotrophic factor (BNDF) linking epilepsy and stress. We discuss current clinical management approaches of stress that help optimize seizure control and prevention, as well as psychiatric comorbidities associated with epilepsy. We propose that various shared mechanisms of stress and epilepsy present multiple avenues for the development of new symptomatic and preventative treatments, including disease modifying therapies aimed at reducing epileptogenesis. This would require close collaborations between clinicians and basic scientists to integrate data across multiple scales, from genetics to systems biology, from clinical observations to fundamental mechanistic insights. In future, advances in machine learning approaches and neuromodulation strategies will enable personalized and targeted interventions to manage and ultimately treat stress-related epileptogenesis.
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Affiliation(s)
- Dhanisha J Jhaveri
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4067, Australia
- Mater Research Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4067, Australia
| | - Aileen McGonigal
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4067, Australia
- Mater Research Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4067, Australia
- Mater Epilepsy Unit, Department of Neurosciences, Mater Hospital, Brisbane, QLD 4101, Australia
| | - Christel Becker
- Institut National de la Santé et de la Recherche Médicale, Unité 1124, Université Paris Cité, Paris, 75006, France
| | - Jean-Jacques Benoliel
- Institut National de la Santé et de la Recherche Médicale, Unité 1124, Université Paris Cité, Paris, 75006, France
- Site Pitié-Salpêtrière, Service de Biochimie Endocrinienne et Oncologie, Assistance Publique Hôpitaux de Paris, Sorbonne Université, Paris, 75651, France
| | - L Sanjay Nandam
- Turner Inst for Brain & Mental Health, Faculty of Medicine, Nursing and Health Sciences, School of Psychological Sciences, Monash University, Melbourne, 3800, Australia
| | - Lisa Soncin
- Institut National de la Santé et de la Recherche Médicale, Institut de Neurosciences des Systèmes, Aix Marseille University, Marseille, 13005, France
- Laboratoire d'Anthropologie et de Psychologie Cliniques, Cognitives et Sociales, Côte d'Azur University, Nice, 06300, France
| | - Iliana Kotwas
- Epileptology and Cerebral Rhythmology, Assistance Publique Hôpitaux de Marseille, Timone Hospital, Marseille, 13005, France
| | - Christophe Bernard
- Institut National de la Santé et de la Recherche Médicale, Institut de Neurosciences des Systèmes, Aix Marseille University, Marseille, 13005, France
| | - Fabrice Bartolomei
- Institut National de la Santé et de la Recherche Médicale, Institut de Neurosciences des Systèmes, Aix Marseille University, Marseille, 13005, France
- Epileptology and Cerebral Rhythmology, Assistance Publique Hôpitaux de Marseille, Timone Hospital, Marseille, 13005, France
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Munger Clary HM. Depression and Epilepsy: The Bidirectional Relation Goes On and On…. Epilepsy Curr 2023; 23:222-224. [PMID: 37662467 PMCID: PMC10470106 DOI: 10.1177/15357597231169553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023] Open
Abstract
Directionality of the Association Between Epilepsy and Depression: A Nationwide Register-Based Cohort Study Bølling-Ladegaard E, Dreier JW, Kessing LV, Budtz-Jørgensen E, Lolk K, Christensen J. Neurology . 2023;100(9):e932-e942. doi:10.1212/WNL.0000000000201542 . Epub 2022 Nov 22. Background and objectives: Epilepsy and depression share a bidirectional relationship; however, its magnitude and long-term temporal association remain to be elucidated. This study investigates the magnitude and long-term association between epilepsy and depression, comparing with the risks of the 2 disorders after another chronic medical illness (asthma). Methods: In a nationwide register-based matched cohort study, we identified all individuals who received a first diagnosis of epilepsy, depression, and asthma from January 1, 1980, to December 31, 2016. We used a Cox regression model to estimate the risk of epilepsy after depression and vice versa and the risk of epilepsy or depression after asthma, compared with healthy references matched on age and sex, adjusting for medical comorbidity, substance abuse, and calendar time. Results were stratified by epilepsy subtype. We furthermore investigated the risk of admission with acute seizures for persons with epilepsy who became depressed. Results: In a population of 8,741,955 individuals, we identified 139,014 persons with epilepsy (54% males, median age at diagnosis 43 years [inter quartile range (IQR) 17-65 years]), 219,990 persons with depression (37% males, median age at diagnosis 43 years [IQR 29-60 years]), and 358,821 persons with asthma (49% males, median age at diagnosis 29 years [IQR 6-56 years]). The adjusted hazard ratio (aHR) of depression after epilepsy was 1.88 (95% CI 1.82-1.95), and the aHR of epilepsy after depression was 2.35 (95% CI 2.25-2.44). The aHR of depression after asthma was 1.63 (95% CI 1.59-1.67) and that of epilepsy after asthma, 1.48 (95% CI 1.44-1.53). The risk of depression was highest in the few years preceding and after an epilepsy diagnosis, and vice versa, but remained elevated during the entire follow-up period for both directions of the association. There was no evidence of a stronger association with depression for any epilepsy subtype. Receiving a diagnosis of depression subsequent to an epilepsy diagnosis was associated with a 1.20-fold (95% CI 1.07-1.36) increased HR of acute hospital admission with seizures. Discussion: We identified a long-term bidirectional relationship between depression and epilepsy in a large-scale cohort study. Risk estimates were higher than those of epilepsy or depression after asthma.
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Gulyaeva NV. Glucocorticoids Orchestrate Adult Hippocampal Plasticity: Growth Points and Translational Aspects. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:565-589. [PMID: 37331704 DOI: 10.1134/s0006297923050012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/10/2023] [Accepted: 04/10/2023] [Indexed: 06/20/2023]
Abstract
The review analyzes modern concepts about the control of various mechanisms of the hippocampal neuroplasticity in adult mammals and humans by glucocorticoids. Glucocorticoid hormones ensure the coordinated functioning of key components and mechanisms of hippocampal plasticity: neurogenesis, glutamatergic neurotransmission, microglia and astrocytes, systems of neurotrophic factors, neuroinflammation, proteases, metabolic hormones, neurosteroids. Regulatory mechanisms are diverse; along with the direct action of glucocorticoids through their receptors, there are conciliated glucocorticoid-dependent effects, as well as numerous interactions between various systems and components. Despite the fact that many connections in this complex regulatory scheme have not yet been established, the study of the factors and mechanisms considered in the work forms growth points in the field of glucocorticoid-regulated processes in the brain and primarily in the hippocampus. These studies are fundamentally important for the translation into the clinic and the potential treatment/prevention of common diseases of the emotional and cognitive spheres and respective comorbid conditions.
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Affiliation(s)
- Natalia V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, 117485, Russia.
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow, 115419, Russia
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11
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Cai L, He Q, Luo H, Gui X, Wei L, Lu Y, Liu J, Sun A. Is depression in patients with temporal lobe epilepsy related to hippocampal sclerosis? A meta-analysis. Clin Neurol Neurosurg 2023; 225:107602. [PMID: 36689793 DOI: 10.1016/j.clineuro.2023.107602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/14/2022] [Accepted: 01/16/2023] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To systematically evaluate the association between hippocampal sclerosis (HS) and depression in patients with temporal lobe epilepsy (TLE) through a meta-analysis. METHODS Chinese and English databases, such as the China National Knowledge Infrastructure (CNKI), Chinese Scientific Journals (VIP), WanFang, the Chinese Biomedical Literature Service System (SinoMed), PubMed and the Web of Science, were searched. RESULTS Two evaluators independently screened the literature, extracted data and evaluated the risk of bias in the included studies in accordance with the inclusion and exclusion criteria. RevMan 5.1 was used to analyze the data. A total of 786 patients with epilepsy were included in the study, including 82 depressive patients with HS and 64 depressive patients without HS. The results showed that the TLE patients with HS were more likely to develop depression than those without HS (odds ratio (OR)= 2.14, 95% confidence interval (CI) [1.45, 3.16], Z = 3.85, p = 0.0001). CONCLUSION HS can be considered a high-risk factor for depression in patients with TLE, and the correlation is significant. However, the sample size included in the study was small; additional high-quality studies are needed in the future.
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Affiliation(s)
- Lun Cai
- Department of Neurology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
| | - Qianchao He
- Department of Neurology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
| | - Huazheng Luo
- Department of Neurology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
| | - Xiongbin Gui
- Department of Surgery, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China.
| | - Liping Wei
- Department of Surgery, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
| | - Yongjing Lu
- Department of Nuclear Medicine, Guangxi Minzu Hospital, Nanning 530001, PR China
| | - Jie Liu
- Department of Neurology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
| | - Anna Sun
- Department of Neurology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning 530023, PR China
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12
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Gulyaeva NV. Multi-Level Plasticity-Pathology Continuum of the Nervous System: Functional Aspects. NEUROCHEM J+ 2022. [DOI: 10.1134/s1819712422040092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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13
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Druzhkova TA, Yakovlev AA, Rider FK, Zinchuk MS, Guekht AB, Gulyaeva NV. Elevated Serum Cortisol Levels in Patients with Focal Epilepsy, Depression, and Comorbid Epilepsy and Depression. Int J Mol Sci 2022; 23:ijms231810414. [PMID: 36142325 PMCID: PMC9499608 DOI: 10.3390/ijms231810414] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/03/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Background: The hypothalamic-pituitary-adrenal (HPA) axis, inflammatory processes and neurotrophic factor systems are involved in pathogenesis of both epilepsy and depressive disorders. The study aimed to explore these systems in patients with focal epilepsy (PWE, n = 76), epilepsy and comorbid depression (PWCED n = 48), and major depressive disorder (PWMDD, n = 62) compared with healthy controls (HC, n = 78). Methods: Parameters of the HPA axis, neurotrophic factors, and TNF-α were measured in blood serum along with the hemogram. Results: Serum cortisol level was augmented in PWE, PWCED, and PWMDD compared with HC and was higher in PWMDD than in PWE. Serum cortisol negatively correlated with Mini–Mental State Examination (MMSE) score in PWE, and positively with depression inventory–II (BDI-II) score in PWMDD. Only PWMDD demonstrated elevated plasma ACTH. Serum TNF-α, lymphocytes, and eosinophils were augmented in PWMDD; monocytes elevated in PWE and PWCED, while neutrophils were reduced in PWE and PWMDD. Serum BDNF was decreased in PWE and PWCED, CNTF was elevated in all groups of patients. In PWE, none of above indices depended on epilepsy etiology. Conclusions: The results confirm the involvement of HPA axis and inflammatory processes in pathogenesis of epilepsy and depression and provide new insights in mechanisms of epilepsy and depression comorbidity.
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Affiliation(s)
- Tatyana A. Druzhkova
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
| | - Alexander A. Yakovlev
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
- Department of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117485 Moscow, Russia
| | - Flora K. Rider
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
| | - Mikhail S. Zinchuk
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
| | - Alla B. Guekht
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
- Department of Neurology, Neurosurgery and Medical Genetics, Pirogov Russian National Research Medical University, 119049 Moscow, Russia
| | - Natalia V. Gulyaeva
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 115419 Moscow, Russia
- Department of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117485 Moscow, Russia
- Correspondence:
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14
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Lee SA, Im K, Choi EJ. Felt stigma may potentiate the relationship between perceived stress and depressive symptoms in persons with epilepsy. Epilepsy Behav 2022; 134:108765. [PMID: 35908417 DOI: 10.1016/j.yebeh.2022.108765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE This study assessed the strengths of association among perceived stress, felt stigma, and depression in adults with epilepsy, and evaluated whether felt stigma altered the association between perceived stress and depression. METHODS This multicenter, cross-sectional study included adults with epilepsy. Depression was assessed using the Beck Depression Inventory (BDI), and perceived stress was evaluated using the 10-item Perceived Stress Scale. Felt stigma was determined using the three-item Stigma Scale for Epilepsy, with individuals categorized as positive for felt stigma if they answered "yes" to at least one of these items. A hierarchical linear regression analysis and an analysis of covariance with interaction terms were performed. RESULTS The 316 adults with epilepsy included 171 men and 145 women; of these, 109 (34.5%) reported felt stigma. A hierarchical linear regression analysis showed that perceived stress was the most important correlate of depressive symptoms, followed by felt stigma, being unemployed, recurrence of generalized or focal to bilateral tonic-clonic seizures, and being married. The model explained 54.0% of the variance of BDI scores. Significant interactions between felt stigma and perceived stress on BDI scores was identified in both crude and adjusted models (p < 0.05 each). Specifically, in an adjusted model, BDI scores were more strongly associated with perceived stress in persons with (p < 0.001, partial eta2 = 0.225) than without (p < 0.001, partial eta2 = 0.205) felt stigma. CONCLUSIONS Perceived stress was the most significant correlate of depressive symptoms in adults with epilepsy, followed by felt stigma. The interaction between perceived stress and felt stigma on depressive symptoms was significant. These findings may help in developing cognitive behavioral therapy for stigma and stress management in persons with epilepsy.
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Affiliation(s)
- Sang-Ahm Lee
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Kayeong Im
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Eun Ju Choi
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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15
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Gorji A. Neuroinflammation: The Pathogenic Mechanism of Neurological Disorders. Int J Mol Sci 2022; 23:ijms23105744. [PMID: 35628553 PMCID: PMC9147744 DOI: 10.3390/ijms23105744] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 05/19/2022] [Indexed: 12/13/2022] Open
Abstract
Neuroinflammation is implicated in the pathophysiology of several neurological diseases [...].
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Affiliation(s)
- Ali Gorji
- Epilepsy Research Center, Westfälische Wilhelms-Universität, 48149 Münster, Germany; ; Tel.: +49-(251)-835-5564
- Department of Neurosurgery and Neurology, Westfälische Wilhelms-Universität, 48149 Münster, Germany
- Department of Neurology and Institute of Translational Neurology, Westfälische Wilhelms-Universität, 48149 Münster, Germany
- Shefa Neuroscience Research Center, Khatam Alanbia Hospital, Tehran 1996835911, Iran
- Neuroscience Research Center, Mashhad University of Medical Sciences, Mashhad 9177948564, Iran
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16
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Gulyaeva NV, Onufriev MV, Moiseeva YV. Ischemic Stroke, Glucocorticoids, and Remote Hippocampal Damage: A Translational Outlook and Implications for Modeling. Front Neurosci 2021; 15:781964. [PMID: 34955730 PMCID: PMC8695719 DOI: 10.3389/fnins.2021.781964] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/22/2021] [Indexed: 01/16/2023] Open
Abstract
Progress in treating ischemic stroke (IS) and its delayed consequences has been frustratingly slow due to the insufficient knowledge on the mechanism. One important factor, the hypothalamic-pituitary-adrenocortical (HPA) axis is mostly neglected despite the fact that both clinical data and the results from rodent models of IS show that glucocorticoids, the hormones of this stress axis, are involved in IS-induced brain dysfunction. Though increased cortisol in IS is regarded as a biomarker of higher mortality and worse recovery prognosis, the detailed mechanisms of HPA axis dysfunction involvement in delayed post-stroke cognitive and emotional disorders remain obscure. In this review, we analyze IS-induced HPA axis alterations and supposed association of corticoid-dependent distant hippocampal damage to post-stroke brain disorders. A translationally important growing point in bridging the gap between IS pathogenesis and clinic is to investigate the involvement of the HPA axis disturbances and related hippocampal dysfunction at different stages of SI. Valid models that reproduce the state of the HPA axis in clinical cases of IS are needed, and this should be considered when planning pre-clinical research. In clinical studies of IS, it is useful to reinforce diagnostic and prognostic potential of cortisol and other HPA axis hormones. Finally, it is important to reveal IS patients with permanently disturbed HPA axis. Patients-at-risk with high cortisol prone to delayed remote hippocampal damage should be monitored since hippocampal dysfunction may be the basis for development of post-stroke cognitive and emotional disturbances, as well as epilepsy.
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Affiliation(s)
- Natalia V Gulyaeva
- Laboratory of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.,Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow, Russia
| | - Mikhail V Onufriev
- Laboratory of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.,Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow, Russia
| | - Yulia V Moiseeva
- Laboratory of Functional Biochemistry of Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia
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17
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Onufriev MV, Moiseeva YV, Zhanina MY, Lazareva NA, Gulyaeva NV. A Comparative Study of Koizumi and Longa Methods of Intraluminal Filament Middle Cerebral Artery Occlusion in Rats: Early Corticosterone and Inflammatory Response in the Hippocampus and Frontal Cortex. Int J Mol Sci 2021; 22:13544. [PMID: 34948340 PMCID: PMC8703333 DOI: 10.3390/ijms222413544] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/11/2021] [Accepted: 12/14/2021] [Indexed: 02/08/2023] Open
Abstract
Two classical surgical approaches for intraluminal filament middle cerebral artery occlusion (MCAO), the Longa et al. (LM) and Koizumi et al. methods (KM), are used as alternatives in preclinical studies to induce stroke in rodents. Comparisons of these MCAO models in mice showed critical differences between them along with similarities (Smith et al. 2015; Morris et al. 2016). In this study, a direct comparison of MCAO-KM and MCAO-LM in rats was performed. Three days after MCAO, infarct volume, mortality rate, neurological deficit, and weight loss were similar in these models. MCAO-LM rats showed an increase in ACTH levels, while MCAO-KM rats demonstrated elevated corticosterone and interleukin-1β in blood serum. Corticosterone accumulation was detected in the frontal cortex (FC) and the hippocampus of the MCAO-KM group. IL1β beta increased in the ipsilateral hippocampus in the MCAO-KM group and decreased in the contralateral FC of MCAO-LM rats. Differences revealed between MCAO-KM and MCAO-LM suggest that corticosterone and interleukin-1β release as well as hippocampal accumulation is more expressed in MCAO-KM rats, predisposing them to corticosterone-dependent distant neuroinflammatory hippocampal damage. The differences between two models, particularly, malfunction of the hypothalamic-pituitary-adrenal axis, should be considered in the interpretation, comparison, and translation of pre-clinical experimental results.
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Affiliation(s)
- Mikhail V. Onufriev
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (M.V.O.); (Y.V.M.); (M.Y.Z.); (N.A.L.)
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 43 Donskaya Str., 115419 Moscow, Russia
| | - Yulia V. Moiseeva
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (M.V.O.); (Y.V.M.); (M.Y.Z.); (N.A.L.)
| | - Marina Y. Zhanina
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (M.V.O.); (Y.V.M.); (M.Y.Z.); (N.A.L.)
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 43 Donskaya Str., 115419 Moscow, Russia
| | - Natalia A. Lazareva
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (M.V.O.); (Y.V.M.); (M.Y.Z.); (N.A.L.)
| | - Natalia V. Gulyaeva
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (M.V.O.); (Y.V.M.); (M.Y.Z.); (N.A.L.)
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 43 Donskaya Str., 115419 Moscow, Russia
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18
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Tret’yakova LV, Kvichansky AA, Bolshakov AP, Gulyaeva NV. Dexamethasone Modulates Lipopolysaccharide-Induced Expression of Proinflammatory Cytokines in Rat Hippocampus. NEUROCHEM J+ 2021. [DOI: 10.1134/s1819712421330011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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19
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Gulyaeva NV. Does the inability of CA1 area to respond to ischemia with early rapid adenosine release contribute to hippocampal vulnerability?: An Editorial Highlight for "Spontaneous, transient adenosine release is not enhanced in the CA1 region of hippocampus during severe ischemia models". J Neurochem 2021; 159:800-803. [PMID: 34480345 DOI: 10.1111/jnc.15498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/30/2022]
Abstract
This Editorial highlights a remarkable study in the current issue of the Journal of Neurochemistry in which Ganesana & Venton (2021) report new data showing that brain ischemia does not elicit transient adenosine release in the CA1 hippocampal area. Using fast-scan cyclic voltammetry at a carbon-fiber microelectrode implanted in the CA1 subfield of the hippocampus, it was shown that none of three different ischemia/reperfusion models could increase spontaneous, transient adenosine release, and more severe models even suppressed this presumably neuroprotective release. Since the authors have previously shown that in the caudate putamen, ischemia increased the frequency of spontaneous adenosine release (Ganesana & Venton, 2018), the new data may disclose a mechanism underlying important regional differences in rapid neuroprotective adenosine signaling. The phenomenon of selective susceptibility of the hippocampus to ischemia/hypoxia is well-documented, and the reported failure of its CA1 area to respond to ischemia by rapid adenosine release may be indicative of an insufficiency of this neuroprotective mechanism contributing to hippocampal vulnerability.
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Affiliation(s)
- Natalia V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.,Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, Moscow, Russia
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20
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Komoltsev IG, Frankevich SO, Shirobokova NI, Volkova AA, Onufriev MV, Moiseeva JV, Novikova MR, Gulyaeva NV. Neuroinflammation and Neuronal Loss in the Hippocampus Are Associated with Immediate Posttraumatic Seizures and Corticosterone Elevation in Rats. Int J Mol Sci 2021; 22:5883. [PMID: 34070933 PMCID: PMC8198836 DOI: 10.3390/ijms22115883] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/25/2021] [Accepted: 05/26/2021] [Indexed: 12/13/2022] Open
Abstract
Hippocampal damage after traumatic brain injury (TBI) is associated with late posttraumatic conditions, such as depression, cognitive decline and epilepsy. Mechanisms of selective hippocampal damage after TBI are not well understood. In this study, using rat TBI model (lateral fluid percussion cortical injury), we assessed potential association of immediate posttraumatic seizures and changes in corticosterone (CS) levels with neuroinflammation and neuronal cell loss in the hippocampus. Indices of distant hippocampal damage (neurodegeneration and neuroinflammation) were assessed using histological analysis (Nissl staining, Iba-1 immunohistochemical staining) and ELISA (IL-1β and CS) 1, 3, 7 and 14 days after TBI or sham operation in male Wistar rats (n = 146). IL-1β was elevated only in the ipsilateral hippocampus on day 1 after trauma. CS peak was detected on day 3 in blood, the ipsilateral and contralateral hippocampus. Neuronal cell loss in the hippocampus was demonstrated bilaterally; in the ipsilateral hippocampus it started earlier than in the contralateral. Microglial activation was evident in the hippocampus bilaterally on day 7 after TBI. The duration of immediate seizures correlated with CS elevation, levels of IL-1β and neuronal loss in the hippocampus. The data suggest potential association of immediate post-traumatic seizures with CS-dependent neuroinflammation-mediated distant hippocampal damage.
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Affiliation(s)
- Ilia G. Komoltsev
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 43 Donskaya Str., 115419 Moscow, Russia
| | - Stepan O. Frankevich
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Natalia I. Shirobokova
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Aleksandra A. Volkova
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Mikhail V. Onufriev
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Julia V. Moiseeva
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Margarita R. Novikova
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
| | - Natalia V. Gulyaeva
- Laboratory of Functional Biochemistry of the Nervous System, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5A Butlerov Str., 117485 Moscow, Russia; (I.G.K.); (S.O.F.); (N.I.S.); (A.A.V.); (M.V.O.); (J.V.M.); (M.R.N.)
- Research and Clinical Center for Neuropsychiatry of Moscow Healthcare Department, 43 Donskaya Str., 115419 Moscow, Russia
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