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Badawy MM, Sayed-Ahmed MZ, Almoshari Y, Alqahtani SS, Alshahrani S, Mabrouk HAA, Abd-Elsalam MM, Alkashif K, Ahmad S, El-Sebaey AM, Hamama MG, Ahmed DAM. Magnesium Supplementation Alleviates the Toxic Effects of Silica Nanoparticles on the Kidneys, Liver, and Adrenal Glands in Rats. TOXICS 2023; 11:381. [PMID: 37112608 PMCID: PMC10141093 DOI: 10.3390/toxics11040381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
Concerns regarding the possible hazards to human health have been raised by the growing usage of silica nanoparticles (SiNPs) in a variety of applications, including industrial, agricultural, and medical applications. This in vivo subchronic study was conducted to assess the following: (1) the toxicity of orally administered SiNPs on the liver, kidneys, and adrenal glands; (2) the relationship between SiNPs exposure and oxidative stress; and (3) the role of magnesium in mitigating these toxic effects. A total of 24 Sprague Dawley male adult rats were divided equally into four groups, as follows: control group, magnesium (Mg) group (50 mg/kg/d), SiNPs group (100 mg/kg/d), and SiNPs+ Mg group. Rats were treated with SiNPs by oral gavage for 90 days. The liver transaminases, serum creatinine, and cortisol levels were evaluated. The tissue malondialdehyde (MDA) and reduced glutathione (GSH) levels were measured. Additionally, the weight of the organs and the histopathological changes were examined. Our results demonstrated that SiNPs exposure caused increased weight in the kidneys and adrenal glands. Exposure to SiNPs was also associated with significant alterations in liver transaminases, serum creatinine, cortisol, MDA, and GSH. Additionally, histopathological changes were significantly reported in the liver, kidneys, and adrenal glands of SiNPs-treated rats. Notably, when we compared the control group with the treated groups with SiNPs and Mg, the results revealed that magnesium could mitigate SiNPs-induced biochemical and histopathologic changes, confirming its effective role as an antioxidant that reduced the accumulation of SiNPs in tissues, and that it returns the levels of liver transaminases, serum creatinine, cortisol, MDA, and GSH to almost normal values.
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Affiliation(s)
- Mohamed Moharram Badawy
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Delta University for Science and Technology, Gamasa 11152, Egypt
| | - Mohamed Z. Sayed-Ahmed
- Department of Clinical Pharmacy, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
- Department of Internal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Yosif Almoshari
- Department of Pharmaceutics, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
| | - Saad S. Alqahtani
- Department of Clinical Pharmacy, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
| | - Saeed Alshahrani
- Department of Pharmacology and Toxicology, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
| | - Heba Allah Ali Mabrouk
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Kafrelsheikh University, Kafr el-Sheikh 33516, Egypt
| | - Marwa M. Abd-Elsalam
- Department of Histology, Faculty of Medicine, Kafrelsheikh University, Kafr el-Sheikh 33516, Egypt
| | - Khalid Alkashif
- Department of Pharmacology and Toxicology, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
| | - Sarfaraz Ahmad
- Department of Clinical Pharmacy, College of Pharmacy, Jazan University, Jizan 45142, Saudi Arabia
| | - Ahmed M. El-Sebaey
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mohamed G. Hamama
- Anatomy Department, Faculty of Medicine, Tanta University, Tanta 31527, Egypt
| | - Dalia Alsaied Moustafa Ahmed
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
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Xin Y, Sun X, Ren L, Chen G, Chen Y, Ni Y, He B. Maternal preconceptional inflammation transgenerationally alters metabolic and behavioral phenotypes in offspring. Life Sci 2023; 321:121577. [PMID: 36933826 DOI: 10.1016/j.lfs.2023.121577] [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: 02/13/2023] [Revised: 03/10/2023] [Accepted: 03/12/2023] [Indexed: 03/18/2023]
Abstract
AIMS Evidence is accumulating that maternal inflammation induces phenotypic changes in the next generation. However, whether maternal preconceptional inflammation alters metabolic and behavioral phenotypes in offspring remains poorly understood. MAIN METHODS Female mice were injected with either lipopolysaccharide or saline to establish the inflammatory model and then allowed to mate with normal males. Offspring from both control and inflammatory dams were subsequently given chow diet and water ad libitum, without any challenge, for metabolic and behavioral tests. KEY FINDINGS Male offspring derived from inflammatory mothers (Inf-F1) maintained on the chow diet developed impaired glucose tolerance and hepatic ectopic fat deposition. Hepatic transcriptome sequencing showed the largest gene changes related to the metabolic pathway. Moreover, Inf-F1 mice exhibited anxiety- and depressive-like behaviors and were accompanied by higher serum corticosterone concentration and lower glucocorticoid receptor abundance in the hippocampus. SIGNIFICANCE The results expand the current knowledge of developmental programming of health and disease to include maternal preconceptional health and provide a basis for understanding metabolic and behavioral alterations in offspring linked to maternal inflammation.
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Affiliation(s)
- Yining Xin
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaoxiao Sun
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Li Ren
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guo Chen
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yingqi Chen
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yingdong Ni
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; MOE Joint International Research Laboratory of Animal Health & Food Safety, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Bin He
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; MOE Joint International Research Laboratory of Animal Health & Food Safety, Nanjing Agricultural University, Nanjing 210095, PR China.
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Dezsi G, Ozturk E, Harris G, Paul C, O'Brien TJ, Jones NC. Metyrapone abolishes spike-wave discharge seizures in genetic absence epilepsy rats from Strasbourg by reducing stress hormones. Epilepsia 2023. [PMID: 36916834 DOI: 10.1111/epi.17584] [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: 09/13/2022] [Revised: 03/10/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023]
Abstract
OBJECTIVE Stress is one of the most commonly reported triggers for seizures in patients with epilepsy, although the mechanisms that mediate this effect are not established. The clinical evidence supporting this is derived from patients' subjective experience of stress, and how this influences their own seizures. Animal models can be used to explore this phenomenon in controlled environments, free from subjective bias. Here, we used genetic absence epilepsy rats from Strasbourg (GAERS), a genetic rat model of absence epilepsy, to explore the influence of stress and stress hormones on spontaneous seizures. METHODS Adult male GAERS (n = 38) and nonepileptic control (NEC) rats (n = 4) were used. First, rats were subjected to 30-min restraint stress to assess hypothalamic-pituitary-adrenal axis function. Next, we assessed the effects of 30-min noise stress, and cage tilt stress, on spike-wave discharge seizures in GAERS. We then performed pharmacological experiments to assess the direct effects of stress hormones on seizures, including corticosterone, metyrapone, and deoxycorticosterone. RESULTS GAERS exhibited elevated baseline corticosterone levels, compared to NEC rats. Noise stress and cage tilt stress significantly enhanced seizure incidence (p < .05), but only during stress periods. Exogenous corticosterone administration also significantly increased seizure occurrence (p < .05). Metyrapone, an inhibitor of corticosterone synthesis, completely abolished seizures in GAERS, and seizures remained suppressed for >2 h. However, deoxycorticosterone, the precursor of corticosterone, increased seizures. SIGNIFICANCE These results suggest that GAERS exhibit elevations in stress hormones, and this may contribute to seizures. Inhibiting corticosterone synthesis with metyrapone prevents seizures in GAERS, and shows potential for repurposing this drug as a future antiseizure medication.
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Affiliation(s)
- Gabi Dezsi
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Ezgi Ozturk
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Georgia Harris
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Cornelius Paul
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Terence J O'Brien
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Department of Neurology, Alfred Hospital, Melbourne, Victoria, Australia
| | - Nigel C Jones
- Department of Medicine, Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Department of Neurology, Alfred Hospital, Melbourne, Victoria, Australia
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Kraus KL, Nawreen N, Godale CM, Chordia AP, Packard B, LaSarge CL, Herman JP, Danzer SC. Hippocampal glucocorticoid receptors modulate status epilepticus severity. Neurobiol Dis 2023; 178:106014. [PMID: 36702319 PMCID: PMC10055427 DOI: 10.1016/j.nbd.2023.106014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/04/2023] [Accepted: 01/22/2023] [Indexed: 01/24/2023] Open
Abstract
Status epilepticus (SE) is a life-threatening medical emergency with significant morbidity and mortality. SE is associated with a robust and sustained increase in serum glucocorticoids, reaching concentrations sufficient to activate the dense population of glucocorticoid receptors (GRs) expressed among hippocampal excitatory neurons. Glucocorticoid exposure can increase hippocampal neuron excitability; however, whether activation of hippocampal GRs during SE exacerbates seizure severity remains unknown. To test this, a viral strategy was used to delete GRs from a subset of hippocampal excitatory neurons in adult male and female mice, producing hippocampal GR knockdown mice. Two weeks after GR knockdown, mice were challenged with the convulsant drug pilocarpine to induce SE. GR knockdown had opposing effects on early vs late seizure behaviors, with sex influencing responses. For both male and female mice, the onset of mild behavioral seizures was accelerated by GR knockdown. In contrast, GR knockdown delayed the onset of more severe convulsive seizures and death in male mice. Concordantly, GR knockdown also blunted the SE-induced rise in serum corticosterone in male mice. GR knockdown did not alter survival times or serum corticosterone in females. To assess whether loss of GR affected susceptibility to SE-induced cell death, within-animal analyses were conducted comparing local GR knockdown rates to local cell loss. GR knockdown did not affect the degree of localized neuronal loss, suggesting cell-intrinsic GR signaling neither protects nor sensitizes neurons to acute SE-induced death. Overall, the findings reveal that hippocampal GRs exert an anti-convulsant role in both males and females in the early stages of SE, followed by a switch to a pro-convulsive role for males only. Findings reveal an unexpected complexity in the interaction between hippocampal GR activation and the progression of SE.
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Affiliation(s)
- Kimberly L Kraus
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America.
| | - Nawshaba Nawreen
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Pharmacology and Systems Physiology, University of Cincinnati School of Medicine, Cincinnati, OH, United States of America.
| | - Christin M Godale
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America.
| | - Arihant P Chordia
- Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America.
| | - Ben Packard
- Department of Pharmacology and Systems Physiology, University of Cincinnati School of Medicine, Cincinnati, OH, United States of America.
| | - Candi L LaSarge
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America; Department of Anesthesiology, University of Cincinnati School of Medicine, Cincinnati, OH, United States of America
| | - James P Herman
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Anesthesiology, University of Cincinnati School of Medicine, Cincinnati, OH, United States of America.
| | - Steve C Danzer
- Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH, United States of America; Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States of America; Department of Anesthesiology, University of Cincinnati School of Medicine, Cincinnati, OH, United States of America.
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Bekdash RA. Methyl Donors, Epigenetic Alterations, and Brain Health: Understanding the Connection. Int J Mol Sci 2023; 24:ijms24032346. [PMID: 36768667 PMCID: PMC9917111 DOI: 10.3390/ijms24032346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/18/2023] [Accepted: 01/21/2023] [Indexed: 01/27/2023] Open
Abstract
Methyl donors such as choline, betaine, folic acid, methionine, and vitamins B6 and B12 are critical players in the one-carbon metabolism and have neuroprotective functions. The one-carbon metabolism comprises a series of interconnected chemical pathways that are important for normal cellular functions. Among these pathways are those of the methionine and folate cycles, which contribute to the formation of S-adenosylmethionine (SAM). SAM is the universal methyl donor of methylation reactions such as histone and DNA methylation, two epigenetic mechanisms that regulate gene expression and play roles in human health and disease. Epigenetic mechanisms have been considered a bridge between the effects of environmental factors, such as nutrition, and phenotype. Studies in human and animal models have indicated the importance of the optimal levels of methyl donors on brain health and behavior across the lifespan. Imbalances in the levels of these micronutrients during critical periods of brain development have been linked to epigenetic alterations in the expression of genes that regulate normal brain function. We present studies that support the link between imbalances in the levels of methyl donors, epigenetic alterations, and stress-related disorders. Appropriate levels of these micronutrients should then be monitored at all stages of development for a healthier brain.
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Affiliation(s)
- Rola A Bekdash
- Department of Biological Sciences, Rutgers University, Newark, NJ 07102, USA
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Sarkisova K, van Luijtelaar G. The impact of early-life environment on absence epilepsy and neuropsychiatric comorbidities. IBRO Neurosci Rep 2022; 13:436-468. [PMID: 36386598 PMCID: PMC9649966 DOI: 10.1016/j.ibneur.2022.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/30/2022] [Accepted: 10/31/2022] [Indexed: 11/11/2022] Open
Abstract
This review discusses the long-term effects of early-life environment on epileptogenesis, epilepsy, and neuropsychiatric comorbidities with an emphasis on the absence epilepsy. The WAG/Rij rat strain is a well-validated genetic model of absence epilepsy with mild depression-like (dysthymia) comorbidity. Although pathologic phenotype in WAG/Rij rats is genetically determined, convincing evidence presented in this review suggests that the absence epilepsy and depression-like comorbidity in WAG/Rij rats may be governed by early-life events, such as prenatal drug exposure, early-life stress, neonatal maternal separation, neonatal handling, maternal care, environmental enrichment, neonatal sensory impairments, neonatal tactile stimulation, and maternal diet. The data, as presented here, indicate that some early environmental events can promote and accelerate the development of absence seizures and their neuropsychiatric comorbidities, while others may exert anti-epileptogenic and disease-modifying effects. The early environment can lead to phenotypic alterations in offspring due to epigenetic modifications of gene expression, which may have maladaptive consequences or represent a therapeutic value. Targeting DNA methylation with a maternal methyl-enriched diet during the perinatal period appears to be a new preventive epigenetic anti-absence therapy. A number of caveats related to the maternal methyl-enriched diet and prospects for future research are discussed.
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Affiliation(s)
- Karine Sarkisova
- Institute of Higher Nervous Activity and Neurophysiology of Russian Academy of Sciences, Butlerova str. 5a, Moscow 117485, Russia
| | - Gilles van Luijtelaar
- Donders Institute for Brain, Cognition, and Behavior, Donders Center for Cognition, Radboud University, Nijmegen, PO Box 9104, 6500 HE Nijmegen, the Netherlands
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Li X, Qiu W, Deng L, Lin J, Huang W, Xu Y, Zhang M, Jones NC, Lin R, Xu H, Lin L, Li P, Wang X. 11β-HSD1 participates in epileptogenesis and the associated cognitive impairment by inhibiting apoptosis in mice. J Transl Med 2022; 20:406. [PMID: 36064418 PMCID: PMC9446697 DOI: 10.1186/s12967-022-03618-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/30/2022] [Indexed: 12/03/2022] Open
Abstract
Background Glucocorticoid signalling is closely related to both epilepsy and associated cognitive impairment, possibly through mechanisms involving neuronal apoptosis. As a critical enzyme for glucocorticoid action, the role of 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1) in epileptogenesis and associated cognitive impairment has not previously been studied. Methods We first investigated the expression of 11β-HSD1 in the pentylenetetrazole (PTZ) kindling mouse model of epilepsy. We then observed the effect of overexpressing 11β-HSD1 on the excitability of primary cultured neurons in vitro using whole-cell patch clamp recordings. Further, we assessed the effects of adeno-associated virus (AAV)-induced hippocampal 11β-HSD1 knockdown in the PTZ model, conducting behavioural observations of seizures, assessment of spatial learning and memory using the Morris water maze, and biochemical and histopathological analyses. Results We found that 11β-HSD1 was primarily expressed in neurons but not astrocytes, and its expression was significantly (p < 0.05) increased in the hippocampus of PTZ epilepsy mice compared to sham controls. Whole-cell patch clamp recordings showed that overexpression of 11β-HSD1 significantly decreased the threshold voltage while increasing the frequency of action potential firing in cultured hippocampal neurons. Hippocampal knockdown of 11β-HSD1 significantly reduced the severity score of PTZ seizures and increased the latent period required to reach the fully kindled state compared to control knockdown. Knockdown of 11β-HSD1 also significantly mitigated the impairment of spatial learning and memory, attenuated hippocampal neuronal damage and increased the ratio of Bcl-2/Bax, while decreasing the expression of cleaved caspase-3. Conclusions 11β-HSD1 participates in the pathogenesis of both epilepsy and the associated cognitive impairment by elevating neuronal excitability and contributing to apoptosis and subsequent hippocampal neuronal damage. Inhibition of 11β-HSD1, therefore, represents a promising strategy to treat epilepsy and cognitive comorbidity.
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Affiliation(s)
- Xueying Li
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China
| | - Wanhua Qiu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, People's Republic of China
| | - Lu Deng
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Jingjing Lin
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China
| | - Wenting Huang
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China
| | - Yuchen Xu
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China
| | - Mulan Zhang
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China
| | - Nigel C Jones
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, 2004, Australia.,Department of Neurology, The Alfred Hospital, Commercial Road, Melbourne, VIC, 3004, Australia.,Department of Medicine, Royal Melbourne Hospital, The University of Melbourne, Melbourne, VIC, 3052, Australia
| | - Runxuan Lin
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, 2004, Australia
| | - Huiqin Xu
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China
| | - Li Lin
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, People's Republic of China. .,Department of Neurosurgery, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China.
| | - Peijun Li
- Department of Neurology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325000, People's Republic of China.
| | - Xinshi Wang
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Shangcai Village, Ouhai District, Wenzhou, Zhejiang Province, People's Republic of China. .,Key Laboratory of Alzheimer's Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, Zhejiang Province, People's Republic of China.
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Oxytocin as an adolescent treatment for methamphetamine addiction after early life stress in male and female rats. Neuropsychopharmacology 2022; 47:1561-1573. [PMID: 35581382 PMCID: PMC9206013 DOI: 10.1038/s41386-022-01336-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/02/2022] [Accepted: 04/27/2022] [Indexed: 11/08/2022]
Abstract
Early life stress (ELS) is associated with perturbed neural development and augmented vulnerability to mental health disorders, including addiction. How ELS changes the brain to increase addiction risk is poorly understood, and there are no therapies which target this ELS-induced vulnerability. ELS disrupts the oxytocin system, which can modulate addiction susceptibility, suggesting that targeting the oxytocin system may be therapeutic in this ELS-addiction comorbidity. Therefore, we determined whether adolescent oxytocin treatment after ELS could: (1) reduce vulnerability to anxiety, social deficits, and methamphetamine-taking and reinstatement; and (2) restore hypothalamic oxytocin and corticotropin-releasing factor expressing neurons and peripheral oxytocin and corticosterone levels. Long Evans pups underwent maternal separation (MS) for either 15 min or 360 min on postnatal days (PND) 1-21. During adolescence (PNDs 28-42), rats received a daily injection of either oxytocin or saline. In Experiment 1, adult rats were assessed using the elevated plus-maze, social interaction procedure, and methamphetamine self-administration procedure, including extinction, and cue-, methamphetamine- and yohimbine-induced reinstatement. In Experiment 2, plasma for enzyme immunoassays and brain tissue for immunofluorescence were collected from adult rats after acute stress exposure. Adolescent oxytocin treatment ameliorated ELS-induced anxiety and reduced methamphetamine- and yohimbine-induced reinstatement in both sexes, and suppressed methamphetamine intake and facilitated extinction in males only. Additionally, adolescent oxytocin treatment after ELS restored oxytocin-immunoreactive cells and stress-induced oxytocin levels in males, and attenuated stress-induced corticosterone levels in both sexes. Adolescent oxytocin treatment reverses some of the ELS effects on later-life psychopathology and vulnerability to addiction.
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Something new and something blue: Responses to novelty in a rodent model of depression and epilepsy comorbidity. Physiol Behav 2022; 249:113778. [PMID: 35278474 DOI: 10.1016/j.physbeh.2022.113778] [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: 11/08/2021] [Revised: 02/27/2022] [Accepted: 03/08/2022] [Indexed: 11/20/2022]
Abstract
A bidirectional comorbidity exists between depression and epilepsy such that patients with epilepsy are at higher risk for developing depression, and vice versa. Each of these conditions individually can be complicated by behavioral effects that worsen quality of life, but less is known about these interactions within the comorbidity of depression and epilepsy. The SwLo rat has been selectively bred for depression-relevant behaviors and exhibits enhanced limbic seizure susceptibility. This study sought to characterize the effects of novelty and stress on the SwLo rodent model of this comorbidity. It was hypothesized that SwLo rats would exhibit altered responses to novelty, reflected in hyperactivity-, anxiety-, sensation seeking-, and/or compulsive behaviors, and that this would be exacerbated with stress. Compared to the SwHi rat (their depression- and epilepsy-resistant counterparts), SwLo rats showed increased entries in all areas of the Open Field Test and spent significantly more time in the light compartment of the Light-Dark Box. SwLo rats also had a significantly higher number of rearing behaviors in the inner squares of the Open Field Test, the closed arms of the Elevated Plus Maze, and both areas of the Light-Dark Box. They demonstrated increased Nestlet shredding but showed no difference in a marble burying task or in latency to consume food in a novelty suppressed feeding task. Interestingly, restraint stress showed little effect on these behaviors, despite increasing corticosterone levels. Combined, these results suggest an increase in exploratory sensation seeking and hypervigilant information-gathering behaviors in the SwLo rat that are not dependent on corticosterone levels. This shows the utility of this model for studying behavioral effects of comorbid depression and epilepsy and allows for their use in identifying underlying mechanisms or screening treatment strategies for this complex comorbidity.
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Early life adversity accelerates epileptogenesis and enhances depression-like behaviors in rats. Exp Neurol 2022; 354:114088. [DOI: 10.1016/j.expneurol.2022.114088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 03/29/2022] [Accepted: 04/15/2022] [Indexed: 11/24/2022]
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Antonazzo IC, Fornari C, Maumus-Robert S, Cei E, Paoletti O, Conti S, Cortesi PA, Mantovani LG, Gini R, Mazzaglia G. Impact of COVID-19 Lockdown, during the Two Waves, on Drug Use and Emergency Department Access in People with Epilepsy: An Interrupted Time-Series Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182413253. [PMID: 34948862 PMCID: PMC8701966 DOI: 10.3390/ijerph182413253] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/11/2021] [Accepted: 12/12/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND In 2020, during the COVID-19 pandemic, Italy implemented two national lockdowns aimed at reducing virus transmission. We assessed whether these lockdowns affected anti-seizure medication (ASM) use and epilepsy-related access to emergency departments (ED) in the general population. METHODS We performed a population-based study using the healthcare administrative database of Tuscany. We defined the weekly time series of prevalence and incidence of ASM, along with the incidence of epilepsy-related ED access from 1 January 2018 to 27 December 2020 in the general population. An interrupted time-series analysis was used to assess the effect of lockdowns on the observed outcomes. RESULTS Compared to pre-lockdown, we observed a relevant reduction of ASM incidence (0.65; 95% Confidence Intervals: 0.59-0.72) and ED access (0.72; 0.64-0.82), and a slight decrease of ASM prevalence (0.95; 0.94-0.96). During the post-lockdown the ASM incidence reported higher values compared to pre-lockdown, whereas ASM prevalence and ED access remained lower. Results also indicate a lower impact of the second lockdown for both ASM prevalence (0.97; 0.96-0.98) and incidence (0.89; 0.80-0.99). CONCLUSION The lockdowns implemented during the COVID-19 outbreaks significantly affected ASM use and epilepsy-related ED access. The potential consequences of these phenomenon are still unknown, although an increased incidence of epilepsy-related symptoms after the first lockdown has been observed. These findings emphasize the need of ensuring continuous care of epileptic patients in stressful conditions such as the COVID-19 pandemic.
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Affiliation(s)
- Ippazio Cosimo Antonazzo
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
| | - Carla Fornari
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
- Correspondence:
| | - Sandy Maumus-Robert
- Team Pharmacoepidemiology, Bordeaux Population Health Research Center, Inserm U1219, University of Bordeaux, 33000 Bordeaux, France;
| | - Eleonora Cei
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
| | - Olga Paoletti
- Epidemiology Unit, Regional Agency for Healthcare Services of Tuscany, 50141 Florence, Italy; (O.P.); (R.G.)
| | - Sara Conti
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
| | - Paolo Angelo Cortesi
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
- Value-Based Healthcare Unit, IRCCS MultiMedica, 20099 Sesto San Giovanni, Italy
| | - Lorenzo Giovanni Mantovani
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
- Value-Based Healthcare Unit, IRCCS MultiMedica, 20099 Sesto San Giovanni, Italy
| | - Rosa Gini
- Epidemiology Unit, Regional Agency for Healthcare Services of Tuscany, 50141 Florence, Italy; (O.P.); (R.G.)
| | - Giampiero Mazzaglia
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (I.C.A.); (E.C.); (S.C.); (P.A.C.); (L.G.M.); (G.M.)
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12
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Wolf DC, Desgent S, Sanon NT, Chen JS, Elkaim LM, Bosoi CM, Awad PN, Simard A, Salam MT, Bilodeau GA, Duss S, Sawan M, Lewis EC, Weil AG. Sex differences in the developing brain impact stress-induced epileptogenicity following hyperthermia-induced seizures. Neurobiol Dis 2021; 161:105546. [PMID: 34742878 DOI: 10.1016/j.nbd.2021.105546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/19/2021] [Accepted: 11/02/2021] [Indexed: 12/24/2022] Open
Abstract
Febrile seizures (FS) are common, affecting 2-5% of children between the ages of 3 months and 6 years. Complex FS occur in 10% of patients with FS and are strongly associated with mesial temporal lobe epilepsy. Current research suggests that predisposing factors, such as genetic and anatomic abnormalities, may be necessary for complex FS to translate to mesial temporal lobe epilepsy. Sex hormones are known to influence seizure susceptibility and epileptogenesis, but whether sex-specific effects of early life stress play a role in epileptogenesis is unclear. Here, we investigate sex differences in the activity of the hypothalamic-pituitary-adrenal (HPA) axis following chronic stress and the underlying contributions of gonadal hormones to the susceptibility of hyperthermia-induced seizures (HS) in rat pups. Chronic stress consisted of daily injections of 40 mg/kg of corticosterone (CORT) subcutaneously from postnatal day (P) 1 to P9 in male and female rat pups followed by HS at P10. Body mass, plasma CORT levels, temperature threshold to HS, seizure characteristics, and electroencephalographic in vivo recordings were compared between CORT- and vehicle (VEH)-injected littermates during and after HS at P10. In juvenile rats (P18-P22), in vitro CA1 pyramidal cell recordings were recorded in males to investigate excitatory and inhibitory neuronal circuits. Results show that daily CORT injections increased basal plasma CORT levels before HS and significantly reduced weight gain and body temperature threshold of HS in both males and females. CORT also significantly lowered the generalized convulsions (GC) latency while increasing recovery time and the number of electrographic seizures (>10s), which had longer duration. Furthermore, sex-specific differences were found in response to chronic CORT injections. Compared to females, male pups had increased basal plasma CORT levels after HS, longer recovery time and a higher number of electrographic seizures (>10s), which also had longer duration. Sex-specific differences were also found at baseline conditions with lower latency to generalized convulsions and longer duration of electrographic seizures in males but not in females. In juvenile male rats, the amplitude of evoked excitatory postsynaptic potentials, as well as the amplitude of inhibitory postsynaptic currents, were significantly greater in CORT rats when compared to VEH littermates. These findings not only validate CORT injections as a stress model, but also show a sex difference in baseline conditions as well as a response to chronic CORT and an impact on seizure susceptibility, supporting a potential link between sustained early-life stress and complex FS. Overall, these effects also indicate a putatively less severe phenotype in female than male pups. Ultimately, studies investigating the biological underpinnings of sex differences as a determining factor in mental and neurologic problems are necessary to develop better diagnostic, preventative, and therapeutic approaches for all patients regardless of their sex.
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Affiliation(s)
- Daniele C Wolf
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada; Département de Neurosciences, Université de Montréal, Québec, Canada.
| | - Sébastien Desgent
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada; Département de Neurosciences, Université de Montréal, Québec, Canada
| | - Nathalie T Sanon
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada
| | - Jia-Shu Chen
- The Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - Lior M Elkaim
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Ciprian M Bosoi
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada
| | - Patricia N Awad
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada
| | - Alexe Simard
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada
| | - Muhammad T Salam
- Laboratoire Polystim, Département de génie électrique, Polytechnique Montréal, Montréal, Québec, Canada
| | - Guillaume-Alexandre Bilodeau
- LITIV Lab., Département de génie informatique et génie logiciel, Polytechnique Montréal, Montréal, Québec, Canada
| | - Sandra Duss
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada
| | - Mohamad Sawan
- Laboratoire Polystim, Département de génie électrique, Polytechnique Montréal, Montréal, Québec, Canada
| | | | - Alexander G Weil
- Centre de Recherche, Centre Hospitalier Universitaire (CHU) Sainte-Justine, Département de Pédiatrie, Université de Montréal, Québec, Canada; Département de Neurosciences, Université de Montréal, Québec, Canada; Neurosurgery Service, Department of Surgery, Université de Montréal, Québec, Canada
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13
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Fernandes SB, Patil ND, Meriaux S, Theresine M, Muller CP, Leenen FAD, Elwenspoek MMC, Zimmer J, Turner JD. Unbiased Screening Identifies Functional Differences in NK Cells After Early Life Psychosocial Stress. Front Immunol 2021; 12:674532. [PMID: 34394074 PMCID: PMC8363253 DOI: 10.3389/fimmu.2021.674532] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 07/13/2021] [Indexed: 12/13/2022] Open
Abstract
Early Life Adversity (ELA) is closely associated with the risk for developing diseases later in life, such as autoimmune diseases, type-2 diabetes and cardiovascular diseases. In humans, early parental separation, physical and sexual abuse or low social-economic status during childhood are known to have great impact on brain development, in the hormonal system and immune responses. Maternal deprivation (MD) is the closest animal model available to the human situation. This paradigm induces long lasting behavioral effects, causes changes in the HPA axis and affects the immune system. However, the mechanisms underlying changes in the immune response after ELA are still not fully understood. In this study we investigated how ELA changes the immune system, through an unbiased analysis, viSNE, and addressed specially the NK immune cell population and its functionality. We have demonstrated that maternal separation, in both humans and rats, significantly affects the sensitivity of the immune system in adulthood. Particularly, NK cells’ profile and response to target cell lines are significantly changed after ELA. These immune cells in rats are not only less cytotoxic towards YAC-1 cells, but also show a clear increase in the expression of maturation markers after 3h of maternal separation. Similarly, individuals who suffered from ELA display significant changes in the cytotoxic profile of NK cells together with decreased degranulation capacity. These results suggest that one of the key mechanisms by which the immune system becomes impaired after ELA might be due to a shift on the senescent state of the cells, specifically NK cells. Elucidation of such a mechanism highlights the importance of ELA prevention and how NK targeted immunotherapy might help attenuating ELA consequences.
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Affiliation(s)
- Sara B Fernandes
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.,Doctoral School in Systems and Molecular Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Neha D Patil
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.,Doctoral School in Systems and Molecular Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Sophie Meriaux
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Maud Theresine
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Claude P Muller
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Fleur A D Leenen
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Martha M C Elwenspoek
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
| | - Jacques Zimmer
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.,Doctoral School in Systems and Molecular Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jonathan D Turner
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
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14
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Godoy LD, Garcia-Cairasco N. Maternal behavior and the neonatal HPA axis in the Wistar Audiogenic Rat (WAR) strain: Early-life implications for a genetic animal model in epilepsy. Epilepsy Behav 2021; 117:107877. [PMID: 33714185 DOI: 10.1016/j.yebeh.2021.107877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/28/2020] [Accepted: 02/20/2021] [Indexed: 10/21/2022]
Abstract
Epileptogenesis is a multistage process and seizure susceptibility can be influenced by stress early in life. Wistar Audiogenic Rat (WAR) strain is an interesting model to study the association between stress and epilepsy, since it is naturally susceptible to seizures and present changes in the hypothalamus-pituitary-adrenal (HPA) axis activity. All these features are related to the pathogenic mechanisms usually associated with psychiatric comorbidities present in epilepsy. Therefore, the current study aimed to evaluate the neonate HPA axis function and maternal care under control and stress conditions in the WAR strain. Maternal behavior and neonate HPA axis were evaluated in Wistar and WAR strains under rest and after the presence of stressors. We observed that WAR pups present higher plasmatic corticosterone concentration as compared to Wistar pups. Although WAR dams do not show significant altered maternal behavior at rest, there is a higher latency to recover the litter in the pup retrieval test, while some did not recover all the litter. Wistar Audiogenic Rat dams presented similar behaviors to Wistar dams to a female intruder and maternal care with the pups in the maternal defense test. Taken together, these findings indicate that the WAR strain could show HPA axis disruption early in life and dams present altered maternal behavior under stressful events. Those alterations make the WAR strain an interesting model to evaluate vulnerability to epilepsy and its associated neuropsychiatric comorbidities.
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Affiliation(s)
- Lívea Dornela Godoy
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Norberto Garcia-Cairasco
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Neuroscience and Behavioral Sciences, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
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15
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Wan L, Yang G, Sun Y, Li Z, Zhang S, Shi X, Wang J. Combined melatonin and adrenocorticotropic hormone treatment attenuates N-methyl-d-aspartate-induced infantile spasms in a rat model by regulating activation of the HPA axis. Neurosci Lett 2021; 748:135713. [PMID: 33571576 DOI: 10.1016/j.neulet.2021.135713] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 01/21/2021] [Accepted: 02/01/2021] [Indexed: 10/22/2022]
Abstract
Infantile spasms (IS) is a serious epileptic syndrome that frequently occurs in infancy. Adrenocorticotropic hormone (ACTH) is generally the first-line treatment for IS; however, side effects limit its application. Melatonin (MT) has been used in clinical treatment for sleep disorders with only minor side effects. Further, MT was shown to be a powerful anticonvulsant in an animal model of epilepsy. In this research, we aimed to compare the anticonvulsant efficacy of ACTH and/or MT for treatment of IS and explore the mechanisms underlying the anticonvulsant activity of MT, using an N-methyl-d-aspartate (NMDA)-induced IS model in neonatal rats following exposure to prenatal stress. Latency to the onset of spasms and the total number of spasms were recorded to assess spasm severity. Treatment with ACTH and/or MT significantly reduced the number of spasms and prolonged the latency period. Additionally, expression of GR-α, HDAC2, BNDF, TrkB, and C-Cbl were significantly increased by induction with NMDA, and this effect was reversed by ACTH and/or MT treatment. Hence, our data suggest that combined ACTH and MT treatment is effective for reducing the number of spasms and increasing the latency period in NMDA rats, by restoring dysregulation of the HPA axis. These findings have the potential to provide a new strategy for the treatment of IS.
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Affiliation(s)
- Lin Wan
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Guang Yang
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Yulin Sun
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Zhichao Li
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Shan Zhang
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Xiuyu Shi
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Jing Wang
- Department of Pediatrics, The First Medical Center of Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
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16
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Lu Z, Wang J, Qu L, Kan G, Zhang T, Shen J, Li Y, Yang J, Niu Y, Xiao Z, Li Y, Zhang X. Reactive mesoporous silica nanoparticles loaded with limonene for improving physical and mental health of mice at simulated microgravity condition. Bioact Mater 2020; 5:1127-1137. [PMID: 32743123 PMCID: PMC7381505 DOI: 10.1016/j.bioactmat.2020.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 02/03/2023] Open
Abstract
Astronauts are under high stress for a long time because of the microgravity condition, which leads to anxiety, affects their learning and memory abilities, and seriously impairs the health of astronauts. Aromatherapy can improve the physical and mental health of astronauts in a way that moisturizes them softly and silently. However, the strong volatility of fragrances and inconvenience of aroma treatment greatly limit their application in the field of spaceflight. In this study, reactive mesoporous silica nanoparticles were prepared to encapsulate and slowly release limonene. The limonene loaded nanoparticles were named limonene@mesoporous silica nanoparticles-cyanuric chloride (LE@MSNs-CYC). LE@MSNs-CYC were then applied to wallpaper to improve the convenience of aromatherapy. LE@MSNs-CYC could chemically react with the wallpaper, thus firmly adsorbed on the wallpaper. In the following, the mice were treated with hindlimb unloading (HU) to simulate a microgravity environment. The results showed that 28-day HU led to an increase in the level of anxiety and declines in learning, memory, and physical health in mice. LE@MSNs-CYC showed significant relief effects on anxiety, learning, memory, and physical health of HU treated mice. Subsequently, the molecular mechanisms were explored by hypothalamic-pituitary-adrenal axis related hormones, immune-related cytokines, learning, and memory-related neurotransmitters and proteins. Large-scale industrial production and cost-effective fabrication of reactive nanofragrance. Strong adhesion of nanofragrance on substrate through covalent bonds. Improvement of physical and mental health under simulated microgravity condition in moisten things softly and silently.
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Affiliation(s)
- Zhiguo Lu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Jianze Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Lina Qu
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Guanghan Kan
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Tianlu Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Jie Shen
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yan Li
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Jun Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Yunwei Niu
- Shanghai Research Institute of Fragrance and Flavor Industry, Shanghai, 200232, PR China
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 200233, PR China
| | - Zuobing Xiao
- Shanghai Research Institute of Fragrance and Flavor Industry, Shanghai, 200232, PR China
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 200233, PR China
| | - Yinghui Li
- State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, 100094, China
- Corresponding author.
| | - Xin Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China
- Corresponding author.
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Gondré-Lewis MC, Bassey R, Blum K. Pre-clinical models of reward deficiency syndrome: A behavioral octopus. Neurosci Biobehav Rev 2020; 115:164-188. [PMID: 32360413 DOI: 10.1016/j.neubiorev.2020.04.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 04/08/2020] [Accepted: 04/20/2020] [Indexed: 12/15/2022]
Abstract
Individuals with mood disorders or with addiction, impulsivity and some personality disorders can share in common a dysfunction in how the brain perceives reward, where processing of natural endorphins or the response to exogenous dopamine stimulants is impaired. Reward Deficiency Syndrome (RDS) is a polygenic trait with implications that suggest cross-talk between different neurological systems that include the known reward pathway, neuroendocrine systems, and motivational systems. In this review we evaluate well-characterized animal models for their construct validity and as potential models for RDS. Animal models used to study substance use disorder, major depressive disorder (MDD), early life stress, immune dysregulation, attention deficit hyperactivity disorder (ADHD), post traumatic stress disorder (PTSD), compulsive gambling and compulsive eating disorders are discussed. These disorders recruit underlying reward deficiency mechanisms in multiple brain centers. Because of the widespread and remarkable array of associated/overlapping behavioral manifestations with a common root of hypodopaminergia, the basic endophenotype recognized as RDS is indeed likened to a behavioral octopus. We conclude this review with a look ahead on how these models can be used to investigate potential therapeutics that target the underlying common deficiency.
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Affiliation(s)
- Marjorie C Gondré-Lewis
- Department of Anatomy, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States; Developmental Neuropsychopharmacology Laboratory, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States.
| | - Rosemary Bassey
- Developmental Neuropsychopharmacology Laboratory, Howard University College of Medicine, 520 W Street, NW, Washington D.C., 20059, United States; Department of Science Education, Donald and Barbara Zucker School of Medicine at Hofstra/ Northwell, 500 Hofstra University, Hempstead, NY 11549, United States
| | - Kenneth Blum
- Western University Health Sciences, Graduate College of Biomedical Sciences, Pomona, California, United States
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18
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Wang L, An CX, Song M, Li N, Gao YY, Zhao XC, Yu LL, Wang YM, Wang XY. Evaluation of childhood traumatic experience as a risk factor for alcohol use disorder in adulthood. BMC Psychiatry 2020; 20:15. [PMID: 31918691 PMCID: PMC6953234 DOI: 10.1186/s12888-020-2428-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 01/02/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We aimed to investigate the effect of early-age (prenatal, infant, and childhood) trauma on adulthood alcohol use disorder. METHODS A total number of 1534 subjects who were born and live in the city of Tangshan were selected. The subjects were divided into three age groups. General demographic data, conditions of the mothers during pregnancy, and condition of the babies at birth, were collected. The diagnosis of alcohol use disorder was based on Structured Clinical Interviews for DSM-IV Axis Disorders (patient version) (SCID). The childhood trauma questionnaire short form (CTQ-SF) [1] and the Lifetime of Experience Questionnaire (LTE-Q) [2] were used to evaluate stress in childhood and adulthood, respectively. RESULTS Only male subjects were diagnosed with lifelong alcohol abuse and alcohol dependence. There was no statistically significant difference in the prevalence of lifetime alcohol use disorder (X2 = 4.480, P = 0.345), current alcohol abuse, and current alcohol dependence among the three groups (X2abuse = 2.177, X2depedence = 2.198, P > 0.05). However, higher prevalence of lifetime alcohol use disorders was found in group with higher scores of CTQ (X2 = 9.315, P = 0.009), emotional abuse (X2 = 8.025, P = 0.018), physical abuse (X2 = 20.4080, P < 0.001), but not in the group with higher scores of emotional neglect (X2 = 1.226, P = 0.542), sexual abuse (X2 = 2.779, P = 0.249), physical neglect (X2 = 3.978, P = 0.137), LTE-Q (X2 = 5.415, P = 0.067), and PSQI (X2 = 5.238, P = 0.073). Protective factor for alcohol abuse for men was identified to be heavy drinking (OR = 0.085, 95%CI: 0.011-0.661), and the risk factors for alcohol abuse were identified to be frequent drinking (OR = 2.736, 95%CI: 1.500, 4.988), and consumption of low liquor (OR = 2.563, 95%CI: 1.387, 4.734). Risk factors for alcohol dependence in males were identified to be consumption of low liquor (OR = 5.501, 95%CI: 2.004, 15.103), frequent drinking (OR = 2.680, 95%CI: 1.164, 6.170), and childhood physical abuse (OR = 2.310, 95% CI: 1.026, 5.201). CONCLUSION Traumatic experience during infant and prenatal periods does not have a strong statistical correlation with alcohol use disorders for male adults. However, subjects with high CTQ scores, experience of emotional abuse and physical abuse show a statistically higher prevalence of lifetime alcohol use disorders. Several risk factors including consumption of low liquor, frequent drinking, and childhood physical abuse contribute to alcohol dependence in male adults.
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Affiliation(s)
- Lan Wang
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Cui-Xia An
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Mei Song
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Na Li
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Yuan-Yuan Gao
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Xiao-Chuan Zhao
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Lu-Lu Yu
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Yu-Mei Wang
- grid.452458.aDepartment of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031 China ,0000 0004 1760 8442grid.256883.2The Mental Health Institute of Hebei Medical University, Shijiazhuang, China ,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China
| | - Xue-Yi Wang
- Department of Psychiatry, The First Hospital of Hebei Medical University, No. 89 Donggang Road, Shijiazhuang, 050031, China. .,The Mental Health Institute of Hebei Medical University, Shijiazhuang, China. .,Hebei Brain Ageing and Cognitive Neuroscience Laboratory, Shijiazhuang, China.
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19
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Liening AN, Epps SA. In Up to My Ears and Temporal Lobes: Effects of Early Life Stress on Epilepsy Development. Curr Top Behav Neurosci 2020; 55:17-40. [PMID: 33454921 DOI: 10.1007/7854_2020_190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Epilepsy and stress are each significant concerns in today's society, bearing heavy impacts on mental and physical health and overall quality of life. Unfortunately, the intersection between these is potentially even more concerning, as stress is a frequent trigger of seizures and may contribute to neural hyperexcitability. A growing body of research suggests a connection between early life stress (occurring in the prenatal or postnatal stage) and later development of epilepsy. While the larger part of this literature suggests that early life stress increases vulnerability for epilepsy development, there are a number of interacting factors influencing this relationship. These factors include developmental stage at which both stressor and seizure assessment occur, type of stressor, sex effects, and type of seizure (convulsive or non-convulsive). Additionally, a number of potential mechanisms have been identified, including activation of the hypothalamic-pituitary-adrenal axis, neuroinflammation, altered inhibitory/excitatory balance, and temporal lobe structures. Developing a clearer understanding of this relationship between early life stress and epilepsy, the factors that influence it, and underlying mechanisms that may serve as targets for intervention is crucial to improving quality of life for persons with epilepsy.
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Affiliation(s)
- Avery N Liening
- Department of Psychology, Whitworth University, Spokane, WA, USA
| | - S Alisha Epps
- Department of Psychology, Whitworth University, Spokane, WA, USA.
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20
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Mazarati A. Can we and should we use animal models to study neurobehavioral comorbidities of epilepsy? Epilepsy Behav 2019; 101:106566. [PMID: 31699663 DOI: 10.1016/j.yebeh.2019.106566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 09/11/2019] [Accepted: 09/12/2019] [Indexed: 11/20/2022]
Abstract
Animal systems have been widely used to examine mechanisms of neurobehavioral comorbidities of epilepsy and to help in developing their effective therapies. Despite the progress made in the field, animal studies have their limitations stemming both from issues with modeling neuropsychiatric disorders in the laboratory and from drawbacks of animal models of epilepsy themselves. This review discusses advantages and weaknesses of experimental paradigms and approaches used to model and to analyze neurobehavioral comorbidities of epilepsy, from the perspectives of their needs, interpretation, ways of improvement, and clinical relevance. Developmental studies are required to adequately address age-specific aspects of the comorbidities. The deployment of preclinical Common Data Elements (pCDEs) for epilepsy research should facilitate the standardization and the harmonization of studies in question, while the application of Research Domain Criteria (RDoC) to characterize neurobehavioral disorders in animals with epilepsy should help in closing the bench-to-bedside gap. Special Issue: Epilepsy & Behavior's 20th Anniversary.
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Affiliation(s)
- Andrey Mazarati
- Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA.
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21
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Early postnatal hypothalamic-pituitary-adrenal axis activity and reduced insulin sensitivity in adult rats. Endocr Regul 2019; 53:213-220. [PMID: 31734655 DOI: 10.2478/enr-2019-0021] [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] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE Early life stress influences the development of metabolic disorders, including functional changes in the developing of pancreas mediated hypothalamic-pituitary-adrenal (HPA) axis. In the present study, the role of an early postnatal stress on corticosterone, glucose, and insulin levels was investigated during young adulthood. METHODS Two groups of pups were studied, including control group (pups not receiving foot shock by communication box), and early stress group (pups receiving foot shock by communication box 2 times/day for 5 consecutive days). In rats, concentration of plasma corticosterone, glucose, and insulin was detected before and after placing them into the communication box at 2 weeks of age. At 8-10 weeks of age, concentrations of plasma corticosterone, glucose, and insulin and glucose tolerance were measured in young adult rats. RESULTS Our results showed that early postnatal foot shock stress increased the corticosterone, insulin, and glucose levels in the postnatal age (p<0.01) that did not last until young adult age, but it caused a significant increase in plasma glucose and insulin levels (p<0.05) following the intraperitoneal glucose tolerance test (IPGTT) in young adult rats. CONCLUSIONS These results suggest that impaired IPGTT in young adult rats who experienced early postnatal stress can indicate insulin resistance or reduced insulin sensitivity that make it at risk of the type 2 diabetes later in life.
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22
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Thébault-Dagher F, Lafontaine MP, Knoth IS, Deguire F, Sheppard E, Cook R, Lagacé M, Gravel J, Lupien S, Lippé S. Febrile seizures and increased stress sensitivity in children: How it relates to seizure characteristics. Epilepsy Behav 2019; 95:154-160. [PMID: 31059921 DOI: 10.1016/j.yebeh.2019.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 03/08/2019] [Accepted: 03/13/2019] [Indexed: 11/17/2022]
Abstract
BACKGROUND Studies suggest that the relationship between seizures and stress starts early in life. However, evidence of long-term altered stress reactivity following early-life seizures is lacking. Our objectives were to assess alterations in stress hormone reactivity in children with past febrile seizures (FS) and investigate how these alterations relate to clinical characteristics. METHOD This case-control study compared a convenience sample of children with simple FS (n = 24), complex FS (n = 18), and matched healthy controls (n = 42). Stress was induced by electrode placement for an electroencephalography (EEG) exam. Salivary cortisol to stress, using three samples collected before and after the stressor, was compared between groups and sex. The relationship between stress reactivity and clinical characteristics (i.e., FS duration, age at first FS, time since the last FS) was investigated. RESULTS Cortisol reactivity to stress was significantly different depending on study groups, F(1, 78) = 6.415, p = 0.003, η2p = 0.141, but not sex nor was there a significant interaction between group and sex (p ≥ 0.581). Participants with simple FS showed higher cortisol reactivity to stress (M = 14.936, Standard deviation (SD) = 26.852) compared with those with complex FS (M = -4.663, SD = 18.649, p = 0.015) and controls (M = -3.817, SD = 18.907, p = 0.003). There was no significant difference between participants with complex FS and controls (p > 0.999). Stress reactivity was not linked to clinical characteristics. CONCLUSIONS Children with past simple FS showed greater changes in salivary cortisol following stress, suggesting enhanced stress sensitivity. As similar results were not found in a population with complex FS, our study shows that stress alterations are not caused by seizure severity. Future studies are needed to investigate whether stress sensitivity may be premorbid to simple FS and may contribute to simple FS incidence.
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Affiliation(s)
- Fanny Thébault-Dagher
- Department of Psychology, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; Centre de recherche en neuropsychologie et cognition, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Marc-Philippe Lafontaine
- Department of Psychology, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; Centre de recherche en neuropsychologie et cognition, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Inga Sophia Knoth
- CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada
| | - Florence Deguire
- Department of Psychology, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; Centre de recherche en neuropsychologie et cognition, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Emilie Sheppard
- Department of Psychology, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; Centre de recherche en neuropsychologie et cognition, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Ramona Cook
- CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Maryse Lagacé
- CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
| | - Jocelyn Gravel
- CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada
| | - Sonia Lupien
- Psychiatry Department, Université de Montréal, Roger-Gaudry Building, 2900 Edouard-Montpetit Boulevard, Montreal, Quebec, Canada; Center for Studies on Human Stress, Institut universitaire en santé mentale de Montréal, 7331 Hochelaga Street, Montreal, Quebec, Canada.
| | - Sarah Lippé
- Department of Psychology, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; Centre de recherche en neuropsychologie et cognition, Université de Montréal, Marie Victorin Building, 90 Vincent-D'Indy Avenue, Montreal, Quebec, Canada; CHU Sainte-Justine Research Center, Université de Montréal, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, Quebec, Canada.
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23
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Nandam LS, Brazel M, Zhou M, Jhaveri DJ. Cortisol and Major Depressive Disorder-Translating Findings From Humans to Animal Models and Back. Front Psychiatry 2019; 10:974. [PMID: 32038323 PMCID: PMC6987444 DOI: 10.3389/fpsyt.2019.00974] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 12/09/2019] [Indexed: 12/15/2022] Open
Abstract
Major depressive disorder (MDD) is a global problem for which current pharmacotherapies are not completely effective. Hypothalamic-pituitary-adrenal (HPA) axis dysfunction has long been associated with MDD; however, the value of assessing cortisol as a biological benchmark of the pathophysiology or treatment of MDD is still debated. In this review, we critically evaluate the relationship between HPA axis dysfunction and cortisol level in relation to MDD subtype, stress, gender and treatment regime, as well as in rodent models. We find that an elevated cortisol response to stress is associated with acute and severe, but not mild or atypical, forms of MDD. Furthermore, the increased incidence of MDD in females is associated with greater cortisol response variability rather than higher baseline levels of cortisol. Despite almost all current MDD treatments influencing cortisol levels, we could find no convincing relationship between cortisol level and therapeutic response in either a clinical or preclinical setting. Thus, we argue that the absolute level of cortisol is unreliable for predicting the efficacy of antidepressant treatment. We propose that future preclinical models should reliably produce exaggerated HPA axis responses to acute or chronic stress a priori, which may, or may not, alter baseline cortisol levels, while also modelling the core symptoms of MDD that can be targeted for reversal. Combining genetic and environmental risk factors in such a model, together with the interrogation of the resultant molecular, cellular, and behavioral changes, promises a new mechanistic understanding of MDD and focused therapeutic strategies.
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Affiliation(s)
- L. Sanjay Nandam
- Mental Health Unit, Prince Charles Hospital, Brisbane, QLD, Australia
- *Correspondence: L. Sanjay Nandam, ; Dhanisha J. Jhaveri,
| | - Matthew Brazel
- Mental Health Unit, Prince Charles Hospital, Brisbane, QLD, Australia
- Department of Psychiatry, Royal Hobart Hospital, Hobart, TAS, Australia
| | - Mei Zhou
- Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Dhanisha J. Jhaveri
- Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia
- *Correspondence: L. Sanjay Nandam, ; Dhanisha J. Jhaveri,
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24
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Maghami S, Zardooz H, Khodagholi F, Binayi F, Ranjbar Saber R, Hedayati M, Sahraei H, Ansari MA. Maternal separation blunted spatial memory formation independent of peripheral and hippocampal insulin content in young adult male rats. PLoS One 2018; 13:e0204731. [PMID: 30332425 PMCID: PMC6192583 DOI: 10.1371/journal.pone.0204731] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 09/13/2018] [Indexed: 01/22/2023] Open
Abstract
This study explores the effects of maternal separation as a chronic early life stress (ELS) on pancreatic islets insulin content and secretion, and their potential relationship with the hippocampus insulin content and spatial memory in young adulthood. Male rat offspring were divided into two groups: stress (STR) and non-stress (non-STR) groups. The animals of the STR group were separated from their mothers during postnatal days (PND) 1 to 21. During the weaning time, that is, PND-0 to PND-21, the body weight and length of the pups were measured. Blood samples were collected on PND-1, 21, 29 and 34 and during young adulthood (53±2 days) to determine plasma corticosterone and insulin levels. The young adult animals were also tested for spatial memory. One day after the memory test, the animals were decapitated and their pancreases were removed to measure the islets insulin content and secretion. Finally, the animals' hippocampi were isolated to determine their insulin content and insulin receptor protein amounts. During the period of weaning, the body weight and length of pups belonging to the STR group were significantly lower as compared to those in the non-STR group. Maternal separation did not change the plasma levels of insulin but increased plasma corticosterone levels from PND-21 to young adulthood and also reduced the islets insulin content but did not affect insulin secretion and the hippocampus insulin content and insulin receptor protein amount. Although, at the end of the memory tests, rats of the STR group reached the escape box at almost the same time and distance and with the same errors as rats of the non-STR group, the distance traveled to reach the escape box showed a steep reduction in the non-STR group as compared to the STR group after the first trial. Moreover, as compared to the STR group, the non-STR group showed an increasing trend for direct strategy to find the escape box. The islets insulin content and secretion, and the plasma insulin concentration were not significantly correlated with the hippocampus insulin content. From the results of the present study, it appears that the main behavioral effect of the maternal separation stress in the spatial memory task was to impair the strategy used by the animals to reach the escape box. This may indicate that maternal separation stress affects brain regions other than the hippocampus. Moreover, due to the reduction of the body weight and length of offspring belonging to the STR group, it should be further considered that both maternal separation and early life malnutrition are directly (and mechanistically) linked to cognitive alterations later in life in ways that are not dependent on peripheral and hippocampal insulin content.
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Affiliation(s)
- Soheila Maghami
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Homeira Zardooz
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- * E-mail: ,
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Binayi
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Roya Ranjbar Saber
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Hedayati
- Cellular and Molecular Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hedayat Sahraei
- Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Ansari
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
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25
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Walker SE, Papilloud A, Huzard D, Sandi C. The link between aberrant hypothalamic–pituitary–adrenal axis activity during development and the emergence of aggression—Animal studies. Neurosci Biobehav Rev 2018; 91:138-152. [DOI: 10.1016/j.neubiorev.2016.10.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 10/09/2016] [Accepted: 10/12/2016] [Indexed: 11/29/2022]
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26
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Hooper A, Paracha R, Maguire J. Seizure-induced activation of the HPA axis increases seizure frequency and comorbid depression-like behaviors. Epilepsy Behav 2018; 78:124-133. [PMID: 29186699 PMCID: PMC7847314 DOI: 10.1016/j.yebeh.2017.10.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 11/30/2022]
Abstract
Our laboratory recently demonstrated that seizures activate the hypothalamic-pituitary-adrenal (HPA) axis, increasing circulating levels of corticosterone (O'Toole et al., 2013). Given the well-established proconvulsant actions of corticosterone, we hypothesized that seizure-induced activation of the HPA axis may contribute to future seizure susceptibility. Further, since hypercortisolism is associated with depression, we propose that seizure-induced activation of the HPA axis may contribute to comorbid depression and epilepsy. To test this hypothesis, we generated mice lacking the GABAA receptor (GABAAR) δ subunit specifically in corticotropin-releasing hormone (CRH) neurons (Gabrd/Crh mice), which exhibit hyporeactivity of the HPA axis (Lee et al., 2014). Gabrd/Crh mice exhibit blunted seizure-induced elevations in corticosterone, establishing a useful tool to investigate the contribution of HPA axis dysfunction on epilepsy and associated comorbidities. Interestingly, Gabrd/Crh mice exhibit decreased acute seizure susceptibility following kainic acid (KA) administration. Furthermore, chronically epileptic Gabrd/Crh mice exhibit a decrease in both spontaneous seizure frequency and depression-like behaviors compared with chronically epileptic Cre-/- littermates. Seizure susceptibility and associated depression-like behaviors can be restored to wild type levels by treating Gabrd/Crh mice with exogenous corticosterone. Similarly, chemogenetic activation of CRH neurons in the paraventricular nucleus (PVN) is sufficient to increase seizure susceptibility; whereas, chemogenetic inhibition of CRH neurons in the PVN of the hypothalamus is sufficient to decrease seizure susceptibility and depression-like behaviors in chronically epileptic mice. These data suggest that seizure-induced activation of the HPA axis promotes seizure susceptibility and comorbid depression-like behaviors, suggesting that the HPA axis may be a novel target for seizure control.
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Affiliation(s)
- Andrew Hooper
- Graduate Program in Neuroscience, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA, 02111
| | | | - Jamie Maguire
- Tufts University School of Medicine, Department of Neuroscience, Boston, MA 02111, United States.
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27
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García-García L, Fernández de la Rosa R, Delgado M, Silván Á, Bascuñana P, Bankstahl JP, Gomez F, Pozo MA. Metyrapone prevents acute glucose hypermetabolism and short-term brain damage induced by intrahippocampal administration of 4-aminopyridine in rats. Neurochem Int 2017; 113:92-106. [PMID: 29203398 DOI: 10.1016/j.neuint.2017.11.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/13/2017] [Accepted: 11/28/2017] [Indexed: 11/29/2022]
Abstract
Intracerebral administration of the potassium channel blocker 4-aminopyridine (4-AP) triggers neuronal depolarization and intense acute seizure activity followed by neuronal damage. We have recently shown that, in the lithium-pilocarpine rat model of status epilepticus (SE), a single administration of metyrapone, an inhibitor of the 11β-hydroxylase enzyme, had protective properties of preventive nature against signs of brain damage and neuroinflammation. Herein, our aim was to investigate to which extent, pretreatment with metyrapone (150 mg/kg, i.p.) was also able to prevent eventual changes in the acute brain metabolism and short-term neuronal damage induced by intrahippocampal injection of 4-AP (7 μg/5 μl). To this end, regional brain metabolism was assessed by 2-deoxy-2-[18F]fluoro-d-glucose ([18F]FDG) positron emission tomography (PET) during the ictal period. Three days later, markers of neuronal death and hippocampal integrity and apoptosis (Nissl staining, NeuN and active caspase-3 immunohistochemistry), neurodegeneration (Fluoro-Jade C labeling), astrogliosis (glial fibrillary acidic protein (GFAP) immunohistochemistry) and microglia-mediated neuroinflammation (in vitro [18F]GE180 autoradiography) were evaluated. 4-AP administration acutely triggered marked brain hypermetabolism within and around the site of injection as well as short-term signs of brain damage and inflammation. Most important, metyrapone pretreatment was able to reduce ictal hypermetabolism as well as all the markers of brain damage except microglia-mediated neuroinflammation. Overall, our study corroborates the neuroprotective effects of metyrapone against multiple signs of brain damage caused by seizures triggered by 4-AP. Ultimately, our data add up to the consistent protective effect of metyrapone pretreatment reported in other models of neurological disorders of different etiology.
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Affiliation(s)
- Luis García-García
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain; Departamento de Farmacología, Farmacognosia y Biología Vegetal, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain.
| | - Rubén Fernández de la Rosa
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain
| | - Mercedes Delgado
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain
| | - Ágata Silván
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain
| | - Pablo Bascuñana
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30625 Hannover, Germany
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30625 Hannover, Germany
| | - Francisca Gomez
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain; Departamento de Farmacología, Farmacognosia y Biología Vegetal, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Miguel A Pozo
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII n° 1, 28040 Madrid, Spain; Departamento de Fisiología, Facultad de Medicina, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; Instituto Tecnológico PET, C/ Manuel Bartolomé Cossío n° 10, 28040 Madrid, Spain
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28
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Raimondo JV, Heinemann U, de Curtis M, Goodkin HP, Dulla CG, Janigro D, Ikeda A, Lin CCK, Jiruska P, Galanopoulou AS, Bernard C. Methodological standards for in vitro models of epilepsy and epileptic seizures. A TASK1-WG4 report of the AES/ILAE Translational Task Force of the ILAE. Epilepsia 2017; 58 Suppl 4:40-52. [PMID: 29105075 DOI: 10.1111/epi.13901] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2017] [Indexed: 01/02/2023]
Abstract
In vitro preparations are a powerful tool to explore the mechanisms and processes underlying epileptogenesis and ictogenesis. In this review, we critically review the numerous in vitro methodologies utilized in epilepsy research. We provide support for the inclusion of detailed descriptions of techniques, including often ignored parameters with unpredictable yet significant effects on study reproducibility and outcomes. In addition, we explore how recent developments in brain slice preparation relate to their use as models of epileptic activity.
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Affiliation(s)
- Joseph V Raimondo
- Division of Cell Biology, Department of Human Biology, Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Uwe Heinemann
- Neuroscience Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Marco de Curtis
- Epilepsy and Experimental Neurophysiology Unit, The Foundation of the Carlo Besta Neurological Institute, Milan, Italy
| | - Howard P Goodkin
- Departments of Neurology and Pediatrics, University of Virginia, Charlottesville, Virginia, U.S.A
| | - Chris G Dulla
- Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, U.S.A
| | - Damir Janigro
- Flocel Inc., Cleveland, Ohio, U.S.A.,Case Western Reserve University, Cleveland, Ohio, U.S.A
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders, and Physiology, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan
| | - Chou-Ching K Lin
- Department of Neurology, College of Medicine and Hospital, National Cheng Kung University, Tainan, Taiwan
| | - Premysl Jiruska
- Department of Developmental Epileptology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Aristea S Galanopoulou
- Laboratory of Developmental Epilepsy, Saul R. Korey Department of Neurology, Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Einstein/Montefiore Epilepsy Center, Montefiore Medical Center, Bronx, New York, U.S.A
| | - Christophe Bernard
- Inserm, Institut de Neurosciences des Systemes UMRS 1106, Aix Marseille University, Marseille, France
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Gunn BG, Baram TZ. Stress and Seizures: Space, Time and Hippocampal Circuits. Trends Neurosci 2017; 40:667-679. [PMID: 28916130 DOI: 10.1016/j.tins.2017.08.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/11/2017] [Accepted: 08/23/2017] [Indexed: 10/18/2022]
Abstract
Stress is a major trigger of seizures in people with epilepsy. Exposure to stress results in the release of several stress mediators throughout the brain, including the hippocampus, a region sensitive to stress and prone to seizures. Stress mediators interact with their respective receptors to produce distinct effects on the excitability of hippocampal neurons and networks. Crucially, these stress mediators and their actions exhibit unique spatiotemporal profiles, generating a complex combinatorial output with time- and space-dependent effects on hippocampal network excitability and seizure generation.
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Affiliation(s)
- B G Gunn
- Department of Pediatrics, University of California, Irvine, CA, USA
| | - T Z Baram
- Department of Pediatrics, University of California, Irvine, CA, USA; Department of Anatomy & Neurobiology, University of California, Irvine, CA, USA; Department of Neurology, University of California, Irvine, CA, USA.
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Thébault-Dagher F, Herba CM, Séguin JR, Muckle G, Lupien SJ, Carmant L, Simard MN, Shapiro GD, Fraser WD, Lippé S. Age at first febrile seizure correlates with perinatal maternal emotional symptoms. Epilepsy Res 2017. [DOI: 10.1016/j.eplepsyres.2017.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Casillas-Espinosa PM, Powell KL, Zhu M, Campbell CR, Maia JM, Ren Z, Jones NC, O’Brien TJ, Petrovski S. Evaluating whole genome sequence data from the Genetic Absence Epilepsy Rat from Strasbourg and its related non-epileptic strain. PLoS One 2017; 12:e0179924. [PMID: 28708842 PMCID: PMC5510834 DOI: 10.1371/journal.pone.0179924] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 06/06/2017] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE The Genetic Absence Epilepsy Rats from Strasbourg (GAERS) are an inbreed Wistar rat strain widely used as a model of genetic generalised epilepsy with absence seizures. As in humans, the genetic architecture that results in genetic generalized epilepsy in GAERS is poorly understood. Here we present the strain-specific variants found among the epileptic GAERS and their related Non-Epileptic Control (NEC) strain. The GAERS and NEC represent a powerful opportunity to identify neurobiological factors that are associated with the genetic generalised epilepsy phenotype. METHODS We performed whole genome sequencing on adult epileptic GAERS and adult NEC rats, a strain derived from the same original Wistar colony. We also generated whole genome sequencing on four double-crossed (GAERS with NEC) F2 selected for high-seizing (n = 2) and non-seizing (n = 2) phenotypes. RESULTS Specific to the GAERS genome, we identified 1.12 million single nucleotide variants, 296.5K short insertion-deletions, and 354 putative copy number variants that result in complete or partial loss/duplication of 41 genes. Of the GAERS-specific variants that met high quality criteria, 25 are annotated as stop codon gain/loss, 56 as putative essential splice sites, and 56 indels are predicted to result in a frameshift. Subsequent screening against the two F2 progeny sequenced for having the highest and two F2 progeny for having the lowest seizure burden identified only the selected Cacna1h GAERS-private protein-coding variant as exclusively co-segregating with the two high-seizing F2 rats. SIGNIFICANCE This study highlights an approach for using whole genome sequencing to narrow down to a manageable candidate list of genetic variants in a complex genetic epilepsy animal model, and suggests utility of this sequencing design to investigate other spontaneously occurring animal models of human disease.
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Affiliation(s)
- Pablo M. Casillas-Espinosa
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Kim L. Powell
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Mingfu Zhu
- Duke University School of Medicine, Duke University, Durham, North Carolina, United States of America
| | - C. Ryan Campbell
- Duke University School of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Jessica M. Maia
- BD Technologies, Research Triangle Park, Durham, North Carolina, United States of America
| | - Zhong Ren
- Institute for Genomic Medicine, Columbia University Medical Center, Columbia University, New York, New York, United States of America
| | - Nigel C. Jones
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Terence J. O’Brien
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Slavé Petrovski
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
- Institute for Genomic Medicine, Columbia University Medical Center, Columbia University, New York, New York, United States of America
- * E-mail:
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Labudda K, Illies D, Herzig C, Schröder K, Bien CG, Neuner F. Current psychiatric disorders in patients with epilepsy are predicted by maltreatment experiences during childhood. Epilepsy Res 2017. [PMID: 28622538 DOI: 10.1016/j.eplepsyres.2017.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE Childhood maltreatment has been shown to be a risk factor for the development of psychiatric disorders. Although the prevalence of psychiatric disorders is high in epilepsy patients, it is unknown if childhood maltreatment experiences are elevated compared to the normal population and if early maltreatment is a risk factor for current psychiatric comorbidities in epilepsy patients. This is the main purpose of this study. METHODS Structured interviews were used to assess current Axis I diagnoses in 120 epilepsy patients from a tertiary Epilepsy Center (34 TLE patients, 86 non-TLE patients). Childhood maltreatment in the family and peer victimization were assessed with validated questionnaires. Patients' maltreatment scores were compared with those of a representative matched control group. Logistic regression analysis was conducted to assess the potential impact of childhood maltreatment on current psychiatric comorbidity in epilepsy patients. RESULTS Compared to a matched control group, epilepsy patients had higher emotional and sexual maltreatment scores. Patients with a current psychiatric diagnosis reported more family and peer maltreatment than patients without a psychiatric disorder. Family maltreatment scores predicted the likelihood of a current psychiatric disorder. TLE patients did not differ from non-TLE patients according to maltreatment experiences and rates of current psychiatric disorders. CONCLUSION Our findings suggest that in epilepsy patients emotional and sexual childhood maltreatment is experienced more often than in the normal population and that early maltreatment is a general risk factor for psychiatric comorbidities in this group.
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Affiliation(s)
- Kirsten Labudda
- Bielefeld University, Department of Psychology, Bielefeld, Germany; Epilepsy Center Bethel, Krankenhaus Mara, Bielefeld, Germany.
| | - Dominik Illies
- Bielefeld University, Department of Psychology, Bielefeld, Germany; Epilepsy Center Bethel, Krankenhaus Mara, Bielefeld, Germany
| | - Cornelia Herzig
- Bielefeld University, Department of Psychology, Bielefeld, Germany
| | | | | | - Frank Neuner
- Bielefeld University, Department of Psychology, Bielefeld, Germany
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García-García L, Shiha AA, Fernández de la Rosa R, Delgado M, Silván Á, Bascuñana P, Bankstahl JP, Gomez F, Pozo MA. Metyrapone prevents brain damage induced by status epilepticus in the rat lithium-pilocarpine model. Neuropharmacology 2017; 123:261-273. [PMID: 28495374 DOI: 10.1016/j.neuropharm.2017.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/27/2017] [Accepted: 05/06/2017] [Indexed: 02/03/2023]
Abstract
The status epilepticus (SE) induced by lithium-pilocarpine is a well characterized rodent model of the human temporal lobe epilepsy (TLE) which is accompanied by severe brain damage. Stress and glucocorticoids markedly contribute to exacerbate neuronal damage induced by seizures but the underlying mechanisms are poorly understood. Herein we sought to investigate whether a single administration of metyrapone (150 mg/kg, i.p.), an 11β-hydroxylase inhibitor, enzyme involved in the peripheral and central synthesis of corticosteroids, had neuroprotective properties in this model. Two experiments were carried out. In exp. 1, metyrapone was administered 3 h before pilocarpine injection whereas in exp. 2, metyrapone administration took place at the onset of the SE. In both experiments, 3 days after the insult, brain metabolism was assessed by in vivo 2-deoxy-2-[18F]fluoro-d-glucose ([18F]FDG) positron emission tomography (PET). Brains were processed for analyses of markers of hippocampal integrity (Nissl staining), neurodegeneration (Fluoro-Jade C), astrogliosis (glial fibrillary acidic protein (GFAP) immunohistochemistry) and, for a marker of activated microglia by in vitro autoradiography with the TSPO (18 kDa translocator protein) radioligand [18F]GE180. The SE resulted in a consistent hypometabolism in hippocampus, cortex and striatum and neuronal damage, hippocampal neurodegeneration, neuronal death and gliosis. Interestingly, metyrapone had neuroprotective effects when administered before, but not after the insult. In summary, we conclude that metyrapone administration prior but not after the SE protected from brain damage induced by SE in the lithium-pilocarpine model. Therefore, it seems that the effect of metyrapone is preventive in nature and likely related to its antiseizure properties.
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Affiliation(s)
- Luis García-García
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain; Departamento de Farmacología, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain.
| | - Ahmed A Shiha
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain
| | - Rubén Fernández de la Rosa
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain
| | - Mercedes Delgado
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain
| | - Ágata Silván
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain
| | - Pablo Bascuñana
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Francisca Gomez
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain; Departamento de Farmacología, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Miguel A Pozo
- Unidad de Cartografía Cerebral, Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII nº 1, 28040 Madrid, Spain; Departamento de Fisiología, Facultad de Medicina, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; Instituto Tecnológico PET, C/ Manuel Bartolomé Cossío nº 10, 28040 Madrid, Spain
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Diagnosing and treating depression in epilepsy. Seizure 2016; 44:184-193. [PMID: 27836391 DOI: 10.1016/j.seizure.2016.10.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/17/2016] [Accepted: 10/20/2016] [Indexed: 01/24/2023] Open
Abstract
At least one third of patients with active epilepsy suffer from significant impairment of their emotional well-being. A targeted examination for possible depression (irrespective of any social, financial or personal burdens) can identify patients who may benefit from medical attention and therapeutic support. Reliable screening instruments such as the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E) are suitable for the timely identification of patients needing help. Neurologists should be capable of managing mild to moderate comorbid depression but referral to mental health specialists is mandatory in severe and difficult-to-treat depression, or if the patient is acutely suicidal. In terms of the therapeutic approach, it is essential first to optimize seizure control and minimize unwanted antiepileptic drug-related side effects. Psychotherapy for depression in epilepsy (including online self-treatment programs) is underutilized although it has proven effective in ten well-controlled trials. In contrast, the effectiveness of antidepressant drugs for depression in epilepsy is unknown. However, if modern antidepressants are used (e.g. SSRI, SNRI, NaSSA), concerns about an aggravation of seizures and or problematic interactions with antiepileptic drugs seem unwarranted. Epilepsy-related stress ("burden of epilepsy") explains depression in many patients but acute and temporary seizure-related states of depression or suicidality have also been reported. Limbic encephalitits may cause isolated mood alteration without any recognizable psychoetiological background indicating a possible role of neuroinflammation. This review will argue that, overall, a bio-psycho-social model best captures the currently available evidence relating to the etiology and treatment of depression as a comorbidity of epilepsy.
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Wulsin AC, Solomon MB, Privitera MD, Danzer SC, Herman JP. Hypothalamic-pituitary-adrenocortical axis dysfunction in epilepsy. Physiol Behav 2016; 166:22-31. [PMID: 27195458 DOI: 10.1016/j.physbeh.2016.05.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 04/04/2016] [Accepted: 05/11/2016] [Indexed: 12/27/2022]
Abstract
Epilepsy is a common neurological disease, affecting 2.4million people in the US. Among the many different forms of the disease, temporal lobe epilepsy (TLE) is one of the most frequent in adults. Recent studies indicate the presence of a hyperactive hypothalamopituitary- adrenocortical (HPA) axis and elevated levels of glucocorticoids in TLE patients. Moreover, in these patients, stress is a commonly reported trigger of seizures, and stress-related psychopathologies, including depression and anxiety, are highly prevalent. Elevated glucocorticoids have been implicated in the development of stress-related psychopathologies. Similarly, excess glucocorticoids have been found to increase neuronal excitability, epileptiform activity and seizure susceptibility. Thus, patients with TLE may generate abnormal stress responses that both facilitate ictal discharges and increase vulnerability for the development of comorbid psychopathologies. Here, we will examine the evidence that the HPA axis is disrupted in TLE, consider potential mechanisms by which this might occur, and discuss the implications of HPA dysfunction for seizuretriggering and psychiatric comorbidities.
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Affiliation(s)
- Aynara C Wulsin
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, College of Medicine, Cincinnati, OH, United States; Neuroscience Program, University of Cincinnati, College of Medicine, Cincinnati, OH, United States; Department of Anesthesia, Cincinnati Childrens Hospital Medical Center, Cincinnati, OH, United States; Department of Pediatrics, Cincinnati Childrens Hospital Medical Center, Cincinnati, OH, United States.
| | - Matia B Solomon
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, College of Medicine, Cincinnati, OH, United States; Neuroscience Program, University of Cincinnati, College of Medicine, Cincinnati, OH, United States
| | - Michael D Privitera
- Department of Neurology, Neuroscience Institute, University of Cincinnati, Cincinnati, OH, United States
| | - Steve C Danzer
- Neuroscience Program, University of Cincinnati, College of Medicine, Cincinnati, OH, United States; Department of Anesthesia, Cincinnati Childrens Hospital Medical Center, Cincinnati, OH, United States; Department of Pediatrics, Cincinnati Childrens Hospital Medical Center, Cincinnati, OH, United States
| | - James P Herman
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, College of Medicine, Cincinnati, OH, United States; Neuroscience Program, University of Cincinnati, College of Medicine, Cincinnati, OH, United States.
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Supriya C, Akhila B, Pratap Reddy K, Girish BP, Sreenivasula Reddy P. Effects of maternal exposure to aflatoxin B1 during pregnancy on fertility output of dams and developmental, behavioral and reproductive consequences in female offspring using a rat model. Toxicol Mech Methods 2016; 26:202-10. [DOI: 10.3109/15376516.2016.1151967] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Yang M, Ozturk E, Salzberg MR, Rees S, Morris M, O'Brien TJ, Jones NC. Environmental enrichment delays limbic epileptogenesis and restricts pathologic synaptic plasticity. Epilepsia 2016; 57:484-94. [DOI: 10.1111/epi.13299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Meng Yang
- Department of Medicine (Royal Melbourne Hospital); Melbourne Brain Centre; The University of Melbourne; Melbourne Victoria Australia
| | - Ezgi Ozturk
- Department of Medicine (Royal Melbourne Hospital); Melbourne Brain Centre; The University of Melbourne; Melbourne Victoria Australia
| | - Michael R. Salzberg
- Department of Medicine (Royal Melbourne Hospital); Melbourne Brain Centre; The University of Melbourne; Melbourne Victoria Australia
- Department of Psychiatry; St Vincent's Hospital; Melbourne Victoria Australia
| | - Sandra Rees
- Department of Anatomy and Neuroscience; University of Melbourne; Melbourne Victoria Australia
| | - Margaret Morris
- Department of Pharmacology; UNSW Australia; Sydney New South Wales Australia
| | - Terence J. O'Brien
- Department of Medicine (Royal Melbourne Hospital); Melbourne Brain Centre; The University of Melbourne; Melbourne Victoria Australia
| | - Nigel C. Jones
- Department of Medicine (Royal Melbourne Hospital); Melbourne Brain Centre; The University of Melbourne; Melbourne Victoria Australia
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Galtrey CM, Cock HR. Stress and Epilepsy. NEUROPSYCHIATRIC SYMPTOMS OF NEUROLOGICAL DISEASE 2016. [DOI: 10.1007/978-3-319-22159-5_15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Gondré-Lewis MC, Warnock KT, Wang H, June HL, Bell KA, Rabe H, Phani Babu Tiruveedhula V, Cook J, Lüddens H, Aurelian L, June HL. Early life stress is a risk factor for excessive alcohol drinking and impulsivity in adults and is mediated via a CRF/GABA(A) mechanism. Stress 2016; 19:235-47. [PMID: 27023221 PMCID: PMC4962560 DOI: 10.3109/10253890.2016.1160280] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Childhood stress and trauma are associated with substance use disorders in adulthood, but the neurological changes that confer increased vulnerability are largely unknown. In this study, maternal separation (MS) stress, restricted to the pre-weaning period, was used as a model to study mechanisms of protracted effects of childhood stress/traumatic experiences on binge drinking and impulsivity. Using an operant self-administration model of binge drinking and a delay discounting assay to measure impulsive-like behavior, we report that early life stress due to MS facilitated acquisition of binge drinking and impulsivity during adulthood in rats. Previous studies have shown heightened levels of corticotropin releasing factor (CRF) after MS, and here, we add that MS increased expression levels of GABA(A) α2 subunit in central stress circuits. To investigate the precise role of these circuits in regulating impulsivity and binge drinking, the CRF1 receptor antagonist antalarmin and the novel GABA(A) α2 subunit ligand 3-PBC were infused into the central amygdala (CeA) and medial prefrontal cortex (mPFC). Antalarmin and 3-PBC at each site markedly reduced impulsivity and produced profound reductions on binge-motivated alcohol drinking, without altering responding for sucrose. Furthermore, whole-cell patch-clamp studies showed that low concentrations of 3-PBC directly reversed the effect of relatively high concentrations of ethanol on α2β3γ2 GABA(A) receptors, by a benzodiazepine site-independent mechanism. Together, our data provide strong evidence that maternal separation, i.e. early life stress, is a risk factor for binge drinking, and is linked to impulsivity, another key risk factor for excessive alcohol drinking. We further show that pharmacological manipulation of CRF and GABA receptor signaling is effective to reverse binge drinking and impulsive-like behavior in MS rats. These results provide novel insights into the role of the brain stress systems in the development of impulsivity and excessive alcohol consumption.
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Affiliation(s)
- Marjorie C. Gondré-Lewis
- Department of Anatomy, Howard University College of Medicine, Washington, DC 20059, USA
- Department of Psychiatry and Behavioral Sciences, Howard University College of Medicine, Washington, DC 20059, USA
- Correspondence and request for materials should be addressed to: Dr. Marjorie C. Gondré-Lewis, Associate Professor, Laboratory for Neurodevelopment, Department of Anatomy, Howard University College of Medicine, 520 W Street, NW, Washington, DC 20059, Ph: 202-806-5274,
| | - Kaitlin T. Warnock
- Department of Psychiatry and Behavioral Sciences, Howard University College of Medicine, Washington, DC 20059, USA
| | - Hong Wang
- Department of Anatomy, Howard University College of Medicine, Washington, DC 20059, USA
| | - Harry L. June
- Department of Psychiatry and Behavioral Sciences, Howard University College of Medicine, Washington, DC 20059, USA
| | - Kimberly A. Bell
- Department of Psychiatry and Behavioral Sciences, Howard University College of Medicine, Washington, DC 20059, USA
| | - Holger Rabe
- Department of Psychiatry, University of Mainz, D-55131, Germany
| | | | - James Cook
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA
| | - Hartmut Lüddens
- Department of Psychiatry, University of Mainz, D-55131, Germany
| | - Laure Aurelian
- Department of Pharmacology and Experimental Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
| | - Harry L. June
- Department of Psychiatry and Behavioral Sciences, Howard University College of Medicine, Washington, DC 20059, USA
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Maguire J. Primed for Problems: Stress Confers Vulnerability to Epilepsy and Associated Comorbidities. Epilepsy Curr 2015; 15:344-6. [PMID: 26633959 PMCID: PMC4657767 DOI: 10.5698/1535-7511-15.6.344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Gélisse P, Genton P, Coubes P, Tang NPL, Crespel A. Can emotional stress trigger the onset of epilepsy? Epilepsy Behav 2015; 48:15-20. [PMID: 26037844 DOI: 10.1016/j.yebeh.2015.05.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 05/05/2015] [Accepted: 05/05/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the potential role of an acute adverse stress as "trigger" for the onset of epilepsy. METHODS Among 4618 consecutive patients, twenty-two reported a major life event within three months before the onset of epilepsy. RESULTS All patients had focal epilepsy except one with idiopathic generalized epilepsy. The temporal lobe was involved in 90% of patients with focal epilepsy. More precisely, 13 patients (62% of patients with focal epilepsy) had medial temporal lobe epilepsy (MTLE), two had lateral temporal lobe epilepsy, four had temporoparietooccipital junction epilepsy, and two patients had central lobe epilepsy. The mean age and the median age at onset of epilepsy for patients with MTLE were both 38 years (range: 9.5-65 years). Ten patients had right and three had left MTLE. Among patients with focal epilepsy, MRI was abnormal in 7 (33%) with hippocampal sclerosis in four, periventricular nodular heterotopia in two, and complex cortical dysgenesis in one. The mean age at onset of epilepsy for patients with brain lesions was 26 years (range: 9.5-49). Twelve patients (54%) reported a death as a triggering factor for the onset of their epilepsy. Seven patients (32%) reported that a relationship of trust had been broken. Three patients (14%) had been subjects of violence. No patient reported sexual abuse as a triggering factor. CONCLUSION This study provides evidence that some patients (5/1000 patients) began their seizures in the wake of significant life events. The average age at onset of epilepsy is quite late, around age 30, even in the presence of brain lesions. These patients are emotionally and affectively more prone to have consequences of a stressful life event. The recognition and management of such situations may bring significant relief with improvement of the control of epilepsy.
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Affiliation(s)
- Philippe Gélisse
- Epilepsy Unit, Hôpital Gui de Chauliac, Montpellier, France; Research Unit (URCMA: Unité de Recherche sur les Comportements et Mouvements Anormaux), INSERM U661, Montpellier, France.
| | | | - Philippe Coubes
- Epilepsy Unit, Hôpital Gui de Chauliac, Montpellier, France; Research Unit (URCMA: Unité de Recherche sur les Comportements et Mouvements Anormaux), INSERM U661, Montpellier, France
| | - Ngoc Phuong Loc Tang
- Epilepsy Unit, Hôpital Gui de Chauliac, Montpellier, France; Research Unit (URCMA: Unité de Recherche sur les Comportements et Mouvements Anormaux), INSERM U661, Montpellier, France
| | - Arielle Crespel
- Epilepsy Unit, Hôpital Gui de Chauliac, Montpellier, France; Research Unit (URCMA: Unité de Recherche sur les Comportements et Mouvements Anormaux), INSERM U661, Montpellier, France
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Takatsuru Y, Koibuchi N. Alteration of somatosensory response in adulthood by early life stress. Front Mol Neurosci 2015; 8:15. [PMID: 26041988 PMCID: PMC4436820 DOI: 10.3389/fnmol.2015.00015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 05/05/2015] [Indexed: 01/01/2023] Open
Abstract
Early life stress is well-known as a critical risk factor for mental and cognitive disorders in adulthood. Such disorders are accompanied by altered neuro- (synapto-) genesis and gene expression. Because psychosomatic disorders induced by early life stress (e.g., physical and/or sexual abuse, and neglect) have become a socio-economic problem, it is very important to clarify the mechanisms underlying these changes. However, despite of intensive clinical and animal studies, such mechanisms have not yet been clarified. Although the disturbance of glucocorticoid and glutamate homeostasis by stress has been well-documented, it has not yet been clarified whether such disturbance by early life stress persists for life. Furthermore, since previous studies have focused on the detection of changes in specific brain regions, such as the hippocampus and prefrontal cortex, it has not been clarified whether early life stress induced changes in the sensory/motor system. Thus, in this review, we introduce recent studies on functional/structural changes in the somatosensory cortex induced by early life stress. We believe that this review provides new insights into the functional alteration of the somatosensory system induced by early life stress. Such information may have clinical relevance in terms of providing effective therapeutic interventions to early life stressed individuals.
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Affiliation(s)
- Yusuke Takatsuru
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Graduate School of Medicine, Gunma University, Maebashi Japan
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Akman O, Moshé SL, Galanopoulou AS. Early life status epilepticus and stress have distinct and sex-specific effects on learning, subsequent seizure outcomes, including anticonvulsant response to phenobarbital. CNS Neurosci Ther 2014; 21:181-92. [PMID: 25311088 DOI: 10.1111/cns.12335] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/14/2014] [Accepted: 09/15/2014] [Indexed: 12/25/2022] Open
Abstract
AIMS Neonatal status epilepticus (SE) is often associated with adverse cognitive and epilepsy outcomes. We investigate the effects of three episodes of kainic acid-induced SE (3KA-SE) and maternal separation in immature rats on subsequent learning, seizure susceptibility, and consequences, and the anticonvulsant effects of phenobarbital, according to sex, type, and age at early life (EL) event. METHODS 3KA-SE or maternal separation was induced on postnatal days (PN) 4-6 or 14-16. Rats were tested on Barnes maze (PN16-19), or lithium-pilocarpine SE (PN19) or flurothyl seizures (PN32). The anticonvulsant effects of phenobarbital (20 or 40 mg/kg/rat, intraperitoneally) pretreatment were tested on flurothyl seizures. FluoroJadeB staining assessed hippocampal injury. RESULTS 3KA-SE or separation on PN4-6 caused more transient learning delays in males and did not alter lithium-pilocarpine SE latencies, but aggravated its outcomes in females. Anticonvulsant effects of phenobarbital were preserved and potentiated in specific groups depending on sex, type, and age at EL event. CONCLUSIONS Early life 3KA-SE and maternal separation cause more but transient cognitive deficits in males but aggravate the consequences of subsequent lithium-pilocarpine SE in females. In contrast, on flurothyl seizures, EL events showed either beneficial or no effect, depending on gender, type, and age at EL events.
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Affiliation(s)
- Ozlem Akman
- Saul R. Korey Department of Neurology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Physiology, Faculty of Medicine, Istanbul Bilim University, Istanbul, Turkey
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Jones NC, O'Brien TJ, Carmant L. Interaction between sex and early-life stress: influence on epileptogenesis and epilepsy comorbidities. Neurobiol Dis 2014; 72 Pt B:233-41. [PMID: 25266701 DOI: 10.1016/j.nbd.2014.09.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/08/2014] [Accepted: 09/12/2014] [Indexed: 12/22/2022] Open
Abstract
Epilepsy is a common brain disorder which is characterised by recurring seizures. In addition to suffering from the constant stress of living with this neurological condition, patients also frequently experience comorbid psychiatric and cognitive disorders which significantly impact their quality of life. There is growing appreciation that stress, in particular occurring in early life, can negatively impact brain development, creating an enduring vulnerability to develop epilepsy. This aligns with the solid connections between early life environments and the development of psychiatric conditions, promoting the possibility that adverse early life events could represent a common risk factor for the later development of both epilepsy and comorbid psychiatric disorders. The influence of sex has been little studied, but recent research points to potential important interactions, particularly with regard to effects mediated by HPA axis programming. Understanding these interactions, and the underlying molecular mechanisms, will provide important new insights into the causation of both epilepsy and of psychiatric disorders, and potentially open up novel avenues for treatment.
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Affiliation(s)
- Nigel C Jones
- Department of Medicine (Royal Melbourne Hospital), Melbourne Brain Centre, University of Melbourne, Parkville, VIC, Australia.
| | - Terence J O'Brien
- Department of Medicine (Royal Melbourne Hospital), Melbourne Brain Centre, University of Melbourne, Parkville, VIC, Australia
| | - Lionel Carmant
- Centre de Recherche du Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montréal, Québec, Canada
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