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Reive BS, Lau V, Sánchez-Lafuente CL, Henri-Bhargava A, Kalynchuk LE, Tremblay MÈ, Caruncho HJ. The Inflammation-Induced Dysregulation of Reelin Homeostasis Hypothesis of Alzheimer's Disease. J Alzheimers Dis 2024:JAD240088. [PMID: 38995785 DOI: 10.3233/jad-240088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
Alzheimer's disease (AD) accounts for most dementia cases, but we lack a complete understanding of the mechanisms responsible for the core pathology associated with the disease (e.g., amyloid plaque and neurofibrillary tangles). Inflammation has been identified as a key contributor of AD pathology, with recent evidence pointing towards Reelin dysregulation as being associated with inflammation. Here we describe Reelin signaling and outline existing research involving Reelin signaling in AD and inflammation. Research is described pertaining to the inflammatory and immunological functions of Reelin before we propose a mechanism through which inflammation renders Reelin susceptible to dysregulation resulting in the induction and exacerbation of AD pathology. Based on this hypothesis, it is predicted that disorders of both inflammation (including peripheral inflammation and neuroinflammation) and Reelin dysregulation (including disorders associated with upregulated Reelin expression and disorders of Reelin downregulation) have elevated risk of developing AD. We conclude with a description of AD risk in various disorders involving Reelin dysregulation and inflammation.
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Affiliation(s)
- Brady S Reive
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Victor Lau
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | | | - Alexandre Henri-Bhargava
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Vancouver Island Health Authority, Victoria, BC, Canada
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Lisa E Kalynchuk
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Marie-Ève Tremblay
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Mental Health Research Cluster, University of Victoria, Victoria, BC, Canada
| | - Hector J Caruncho
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Mental Health Research Cluster, University of Victoria, Victoria, BC, Canada
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2
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Crisóstomo L, Oliveira PF, Alves MG. A systematic scientometric review of paternal inheritance of acquired metabolic traits. BMC Biol 2023; 21:255. [PMID: 37953286 PMCID: PMC10641967 DOI: 10.1186/s12915-023-01744-6] [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: 07/03/2023] [Accepted: 10/24/2023] [Indexed: 11/14/2023] Open
Abstract
BACKGROUND The concept of the inheritance of acquired traits, a foundational principle of Lamarck's evolutionary theory, has garnered renewed attention in recent years. Evidence for this phenomenon remained limited for decades but gained prominence with the Överkalix cohort study in 2002. This study revealed a link between cardiovascular disease incidence and the food availability experienced by individuals' grandparents during their slow growth periods, reigniting interest in the inheritance of acquired traits, particularly in the context of non-communicable diseases. This scientometric analysis and systematic review comprehensively explores the current landscape of paternally transmitted acquired metabolic traits. RESULTS Utilizing Scopus Advanced search and meticulous screening, we included mammalian studies that document the inheritance or modification of metabolic traits in subsequent generations of unexposed descendants. Our inclusive criteria encompass intergenerational and transgenerational studies, as well as multigenerational exposures. Predominantly, this field has been driven by a select group of researchers, potentially shaping the design and focus of existing studies. Consequently, the literature primarily comprises transgenerational rodent investigations into the effects of ancestral exposure to environmental pollutants on sperm DNA methylation. The complexity and volume of data often lead to multiple or redundant publications. This practice, while understandable, may obscure the true extent of the impact of ancestral exposures on the health of non-exposed descendants. In addition to DNA methylation, studies have illuminated the role of sperm RNAs and histone marks in paternally acquired metabolic disorders, expanding our understanding of the mechanisms underlying epigenetic inheritance. CONCLUSIONS This review serves as a comprehensive resource, shedding light on the current state of research in this critical area of science, and underscores the need for continued exploration to uncover the full spectrum of paternally mediated metabolic inheritance.
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Affiliation(s)
- Luís Crisóstomo
- Departmento de Anatomia, UMIB - Unidade Multidisciplinar de Investigação Biomédica, ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade Do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto, Portugal
- MediCity Research Laboratory, University of Turku, Turku, Finland
| | - Pedro F Oliveira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Marco G Alves
- Departmento de Anatomia, UMIB - Unidade Multidisciplinar de Investigação Biomédica, ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade Do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal.
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto, Portugal.
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Institute of Food and Agricultural Technology, University of Girona, Girona, Spain.
- Unit of Cell Biology, Department of Biology, Faculty of Sciences, University of Girona, Girona, Spain.
- Institute of Biomedicine - iBiMED and Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal.
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3
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Yu YH, Kim SW, Im H, Lee YR, Kim GW, Ryu S, Park DK, Kim DS. Febrile Seizure Causes Deficit in Social Novelty, Gliosis, and Proinflammatory Cytokine Response in the Hippocampal CA2 Region in Rats. Cells 2023; 12:2446. [PMID: 37887290 PMCID: PMC10605585 DOI: 10.3390/cells12202446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/22/2023] [Accepted: 10/11/2023] [Indexed: 10/28/2023] Open
Abstract
Febrile seizure (FS), which occurs as a response to fever, is the most common seizure that occurs in infants and young children. FS is usually accompanied by diverse neuropsychiatric symptoms, including impaired social behaviors; however, research on neuropsychiatric disorders and hippocampal inflammatory changes following febrile seizure occurrences is very limited. Here, we provide evidence linking FS occurrence with ASD pathogenesis in rats. We developed an FS juvenile rats model and found ASD-like abnormal behaviors including deficits in social novelty, repetitive behaviors, and hyperlocomotion. In addition, FS model juvenile rats showed enhanced levels of gliosis and inflammation in the hippocampal CA2 region and cerebellum. Furthermore, abnormal levels of social and repetitive behaviors persisted in adults FS model rats. These findings suggest that the inflammatory response triggered by febrile seizures in young children could potentially serve as a mediator of social cognitive impairments.
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Affiliation(s)
- Yeon Hee Yu
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
| | - Seong-Wook Kim
- Graduate School of New Drug Discovery & Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea;
| | - Hyuna Im
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
| | - Yu Ran Lee
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
| | - Gun Woo Kim
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
| | - Seongho Ryu
- Soonchunhyang Institute of Med-Bio Science (SIMS), Soonchunhyang University, Cheonan-si 31151, Republic of Korea;
- Department of Pathology, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea
| | - Dae-Kyoon Park
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
| | - Duk-Soo Kim
- Department of Anatomy, College of Medicine, Soonchunhyang University, Cheonan-si 31151, Republic of Korea; (Y.H.Y.); (H.I.); (Y.R.L.); (G.W.K.)
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4
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Yi Y, Zhong C, Wei-wei H. The long-term neurodevelopmental outcomes of febrile seizures and underlying mechanisms. Front Cell Dev Biol 2023; 11:1186050. [PMID: 37305674 PMCID: PMC10248510 DOI: 10.3389/fcell.2023.1186050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 05/16/2023] [Indexed: 06/13/2023] Open
Abstract
Febrile seizures (FSs) are convulsions caused by a sudden increase in body temperature during a fever. FSs are one of the commonest presentations in young children, occurring in up to 4% of children between the ages of about 6 months and 5 years old. FSs not only endanger children's health, cause panic and anxiety to families, but also have many adverse consequences. Both clinical and animal studies show that FSs have detrimental effects on neurodevelopment, that cause attention deficit hyperactivity disorder (ADHD), increased susceptibility to epilepsy, hippocampal sclerosis and cognitive decline during adulthood. However, the mechanisms of FSs in developmental abnormalities and disease occurrence during adulthood have not been determined. This article provides an overview of the association of FSs with neurodevelopmental outcomes, outlining both the underlying mechanisms and the possible appropriate clinical biomarkers, from histological changes to cellular molecular mechanisms. The hippocampus is the brain region most significantly altered after FSs, but the motor cortex and subcortical white matter may also be involved in the development disorders induced by FSs. The occurrence of multiple diseases after FSs may share common mechanisms, and the long-term role of inflammation and γ-aminobutyric acid (GABA) system are currently well studied.
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Affiliation(s)
- You Yi
- Department of Pharmacology and Department of Pharmacy of the Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, China
| | - Chen Zhong
- Department of Pharmacology and Department of Pharmacy of the Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hu Wei-wei
- Department of Pharmacology and Department of Pharmacy of the Second Affiliated Hospital, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, China
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5
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Environmental enrichment mitigates PTSD-like behaviors in adult male rats exposed to early life stress by regulating histone acetylation in the hippocampus and amygdala. J Psychiatr Res 2022; 155:120-136. [PMID: 36029624 DOI: 10.1016/j.jpsychires.2022.07.067] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/04/2022] [Accepted: 07/25/2022] [Indexed: 11/20/2022]
Abstract
Early life stress (ELS) can cause long-term changes in gene expression, affect cognition, mood, and behavior, and increase susceptibility to post-traumatic stress disorder (PTSD) in adulthood, in which the histone acetylation plays a crucial role. Studies have found that environmental enrichment (EE) mitigated the unfavorable outcomes of ELS. However, the underlying mechanism of the histone acetylation is not yet completely clear. The purpose of this study was to explore the effect of EE on the histone acetylation after ELS. In this study, using single prolonged stress (SPS) paradigm in early adolescent rats explored the long-term effects of ELS on behavior, the activity of histone acetyltransferases (HATs) and histone deacetylases (HDACs), as well as the acetylation levels of the lysine 9 site of histone H3 (H3K9) and lysine 12 site of histone H4 (H4K12) in the hippocampus and amygdala. Meanwhile, the protective effects of EE intervention were examined. We found that adult male rats exposed to ELS showed behavioral changes, including reduced locomotor activity, increased anxiety-like behaviors, impaired spatial learning and memory, enhanced contextual and cued fear memory, and the HATs/HDACs ratio and acetyl H3K9 (Ac-H3K9) and acetyl H4K12 (Ac-H4K12) were increased in the hippocampus and decreased in the amygdala. Furthermore, EE attenuated the behavioral abnormalities from ELS, possibly through down-regulating the activity of HATs in the hippocampus and up-regulating HDACs activities in the amygdala. These finding suggested that EE could ameliorate ELS-induced PTSD-like behaviors by regulating histone acetylation in the hippocampus and amygdala, reducing the susceptibility to PTSD in adulthood.
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Crespo M, León-Navarro DA, Martín M. Hyperthermia-induced seizures during neonatal period alter the functionality of A 1 and A 2A receptors in the cerebellum and evoke fine motor impairment and gait disturbances in adult rats. Physiol Behav 2021; 240:113543. [PMID: 34332977 DOI: 10.1016/j.physbeh.2021.113543] [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: 06/13/2021] [Revised: 07/20/2021] [Accepted: 07/25/2021] [Indexed: 10/20/2022]
Abstract
Febrile seizures (FS) are one of the most common types of convulsive disorder of early childhood and they can be classified into simple and prolonged depending on the duration. Nowadays, simple FS have a good prognosis but there is controversy about the outcome of prolonged FS. In a previous work using an animal model of prolonged FS, we showed that hiperthermia-induced seizures (HIS) evoked fine motor coordination impairment and gait disturbances in adolescent rats in a process in which seemed to be involved modulation of the cerebellar adenosinergic system. The aim of the present work was to verify whether the effect was maintained in adulthood. To this end, neonatal rats (PD 12) were exposed to HIS and after 48 days (PD 60) they were assayed on balance beam and footprint tests. Animals were sacrificed 53 days after HIS and adenosine A1 and A2A receptor signalling pathways were studied in cerebellar plasma membranes by using radioligand binding assays and by measuring the activities of 5´-nucleotidase and adenylyl cyclase. Results obtained revealed that adult rats exposed to HIS showed gait disturbances and motor impairments. Besides, animals exposed to hyperthermic insult showed an increase in adenosine A2A receptor functionality and 5´-nucleotidase activity. Surprisingly, the functionality of the adenosine A1 receptor resulted significantly changed causing stimulation instead of inhibition of adenylate cyclase activity. These results showed that the effect of prolonged FS at the early age also persist in adulthood suggesting on must pay attention to FS in children.
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Affiliation(s)
- M Crespo
- Universidad de Castilla-La Mancha. Department of Inorganic, Organic Chemistry and Biochemistry. Faculty of Chemical and Technological Sciences. School of Medicine of Ciudad Real. Regional Centre of Biomedical Research (CRIB), Avenida Camilo José Cela, 10, 13071 Ciudad Real, Spain
| | - D A León-Navarro
- Universidad de Castilla-La Mancha. Department of Inorganic, Organic Chemistry and Biochemistry. Faculty of Chemical and Technological Sciences. School of Medicine of Ciudad Real. Regional Centre of Biomedical Research (CRIB), Avenida Camilo José Cela, 10, 13071 Ciudad Real, Spain.
| | - M Martín
- Universidad de Castilla-La Mancha. Department of Inorganic, Organic Chemistry and Biochemistry. Faculty of Chemical and Technological Sciences. School of Medicine of Ciudad Real. Regional Centre of Biomedical Research (CRIB), Avenida Camilo José Cela, 10, 13071 Ciudad Real, Spain
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7
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Chen KD, Hall AM, Garcia-Curran MM, Sanchez GA, Daglian J, Luo R, Baram TZ. Augmented seizure susceptibility and hippocampal epileptogenesis in a translational mouse model of febrile status epilepticus. Epilepsia 2021; 62:647-658. [PMID: 33475157 DOI: 10.1111/epi.16814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Prolonged fever-induced seizures (febrile status epilepticus [FSE]) during early childhood increase the risk for later epilepsy, but the underlying mechanisms are incompletely understood. Experimental FSE (eFSE) in rats successfully models human FSE, recapitulating the resulting epileptogenesis in a subset of affected individuals. However, the powerful viral and genetic tools that may enhance mechanistic insights into epileptogenesis and associated comorbidities, are better-developed for mice. Therefore, we aimed to determine if eFSE could be generated in mice and if it provoked enduring changes in hippocampal-network excitability and the development of spontaneous seizures. METHODS We employed C57BL/6J male mice, the strain used most commonly in transgenic manipulations, and examined if early life eFSE could be sustained and if it led to hyperexcitability of hippocampal networks and to epilepsy. Outcome measures included vulnerability to the subsequent administration of the limbic convulsant kainic acid (KA) and the development of spontaneous seizures. In the first mouse cohort, adult naive and eFSE-experiencing mice were exposed to KA. A second cohort of control and eFSE-experiencing young adult mice was implanted with bilateral hippocampal electrodes and recorded using continuous video-electroencephalography (EEG) for 2 to 3 months to examine for spontaneous seizures (epileptogenesis). RESULTS Induction of eFSE was feasible and eFSE increased the susceptibility of adult C57BL/6J mice to KA, thereby reducing latency to seizure onset and increasing seizure severity. Of 24 chronically recorded eFSE mice, 4 (16.5%) developed hippocampal epilepsy with a latent period of ~3 months, significantly different from the expectation by chance (P = .04). The limbic epilepsy that followed eFSE was progressive. SIGNIFICANCE eFSE promotes pro-epileptogenic network changes in a majority of C57BL/6J male mice and frank "temporal lobe-like" epilepsy in one sixth of the cohort. Mouse eFSE may thus provide a useful tool for investigating molecular, cellular, and circuit changes during the development of temporal lobe epilepsy and its comorbidities.
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Affiliation(s)
- Kevin D Chen
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Alicia M Hall
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Megan M Garcia-Curran
- Department of Anatomy & Neurobiology, University of California-Irvine, Irvine, CA, USA
| | - Gissell A Sanchez
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Jennifer Daglian
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Renhao Luo
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Tallie Z Baram
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA.,Department of Anatomy & Neurobiology, University of California-Irvine, Irvine, CA, USA.,Department of Neurology, University of California-Irvine, Irvine, CA, USA
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8
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Xu J, Sun M, Li X, Huang L, Gao Z, Gao J, Xie A. MicroRNA expression profiling after recurrent febrile seizures in rat and emerging role of miR-148a-3p/SYNJ1 axis. Sci Rep 2021; 11:1262. [PMID: 33441699 PMCID: PMC7806659 DOI: 10.1038/s41598-020-79543-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 12/04/2020] [Indexed: 02/06/2023] Open
Abstract
Febrile seizures (FSs) are common neurological disorders in both infants and children, although the precise underlying mechanism remains to be explored, especially in the expression pattern and function of microRNAs (miRNAs). In this report, we aimed to screen new potential miRNAs and examine the role of miR-148a-3p in hippocampal neurons in FS rats via Synaptojanin-1 (SYNJ1). Thirty rats were randomly divided into the normal and FS model groups, which were investigated by miRNA array. This process identified 31 differentially expressed (20 upregulated and 11 downregulated) miRNAs and potential miRNA target genes. In addition, hippocampal neurons were assigned into five groups for different transfections. Apoptosis was detected by TUNEL and flow cytometry. SYNJ1 was identified as a target gene of miR-148-3p. In vitro experiments revealed that inhibition of miR-148a-3p decreased neuronal cell apoptosis. Moreover, overexpression of miR-148a-3p resulted in activation of PI3K/Akt signaling pathway and the apoptosis of hippocampal neurons. MiR-148a-3p inhibitor could reverse the above events. Taken together, our data demonstrated that the hippocampal miRNA expression profiles of a rat model of FS provide a large database of candidate miRNAs and neuron-related target genes. Furthermore, miR-148a-3p acted as a apoptosis enhcaner via the activation of the SYNJ1/PI3K/Akt signaling pathway, highlighting a potential therapeutic target in the treatment of infants with hyperthermia-induced brain injury.
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Affiliation(s)
- Jian Xu
- grid.268079.20000 0004 1790 6079Department of Neurology, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China ,grid.268079.20000 0004 1790 6079Department of Clinical Lab, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
| | - Mingqiang Sun
- grid.268079.20000 0004 1790 6079Department of Clinical Lab, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
| | - Xiaodong Li
- grid.268079.20000 0004 1790 6079Department of Pediatric, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
| | - Lei Huang
- grid.239573.90000 0000 9025 8099Department of Cancer Blood Disease, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229 USA
| | - Zhenzhong Gao
- grid.268079.20000 0004 1790 6079Department of Pediatric, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
| | - Jian Gao
- grid.268079.20000 0004 1790 6079Department of Pediatric, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
| | - Anmu Xie
- grid.268079.20000 0004 1790 6079Department of Neurology, Maternal and Child Health Hospital of Weifang Medical University, Weifang, 261011 China
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9
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Atabaki R, Roohbakhsh A, Moghimi A, Mehri S. Protective effects of maternal administration of curcumin and hesperidin in the rat offspring following repeated febrile seizure: Role of inflammation and TLR4. Int Immunopharmacol 2020; 86:106720. [PMID: 32585605 DOI: 10.1016/j.intimp.2020.106720] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/15/2020] [Accepted: 06/15/2020] [Indexed: 12/12/2022]
Abstract
Neuroinflammation has a key role in seizure generation and perpetuation in the neonatal period, and toll-like receptor 4 (TLR4) pathway has a prominent role in neuroinflammatory diseases. Administration of antioxidants and targeting TLR4 in the embryonic period may protect rat offspring against the next incidence of febrile seizure and its harmful effects. Curcumin and hesperidin are natural compounds with anti-inflammatory and antioxidant properties and have an inhibitory action on TLR4 receptors. We evaluated the effect of maternal administration of curcumin and hesperidin on infantile febrile seizure and subsequent memory dysfunction in adulthood. Hyperthermia febrile seizure was induced on postnatal days 9-11 on male rat pups with 24 h intervals, in a Plexiglas box that was heated to ~45 °C by a heat lamp. We used enzyme-linked immunosorbent assay, Western blotting, malondialdehyde (MDA), and glutathione (GSH) assessment for evaluation of inflammatory cytokine levels, TLR4 protein expression, and oxidative responses in the hippocampal tissues. For assessing working memory and long-term potentiation, the double Y-maze test and Schaffer collateral-CA1 in vivo electrophysiological recording were performed, respectively Our results showed that curcumin and hesperidin decreased TNF-α, IL-10, and TLR4 protein expression and reversed memory dysfunction. However, they did not provoke a significant effect on GSH content or amplitude and slope of recorded fEPSPs in the hippocampus. In addition, curcumin, but not hesperidin, decreased interleukin-1β (IL-1β) and MDA levels. These findings imply that curcumin and hesperidin induced significant protective effects on febrile seizures, possibly via their anti-inflammatory and antioxidant properties and downregulation of TLR4.
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Affiliation(s)
- Rabi Atabaki
- Rayan Center for Neuroscience & Behavior, Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Iran
| | - Ali Roohbakhsh
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Moghimi
- Rayan Center for Neuroscience & Behavior, Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Iran.
| | - Soghra Mehri
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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10
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Tang Y, Feng B, Wang Y, Sun H, You Y, Yu J, Chen B, Xu C, Ruan Y, Cui S, Hu G, Hou T, Chen Z. Structure-based discovery of CZL80, a caspase-1 inhibitor with therapeutic potential for febrile seizures and later enhanced epileptogenic susceptibility. Br J Pharmacol 2020; 177:3519-3534. [PMID: 32346861 DOI: 10.1111/bph.15076] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE Febrile seizures (FS), the most common seizures in childhood and often accompanied by later epileptogenesis, are not well controlled. Inflammatory processes have been implicated in the pathophysiology of epilepsy. However, whether caspase-1 is involved in FS generation and could be a target for the treatment of FS is still unclear. EXPERIMENTAL APPROACH By using pharmacological and gene intervention methods in C57BL/6J mice, we assessed the role of caspase-1 in FS generation. We used structural virtual screening against the active site of caspase-1, to screen compounds for druggable and safe low MW inhibitors of caspase-1 in vitro. One compound was chosen to test in vivo for therapeutic potential, using FS models in neonatal mice and epileptogenesis in adult mice. KEY RESULTS In mice, levels of cleaved caspase-1 increased prior to FS onset. Caspase-1-/- mice were resistant to FS and showed lower neuronal excitability than wild-type littermates. Conversely, overexpression of caspase-1 using in utero electroporation increased neuronal excitability and enhanced susceptibility to FS. The structural virtual screening, using molecular docking approaches for the active site of caspase-1 of over 1 million compounds yielded CZL80, a brain-penetrable, low MW inhibitor of caspase-1. In neonatal mice, CZL80 markedly reduced neuronal excitability and incidence of FS generation, and, in adult mice, relieved later enhanced epileptogenic susceptibility. CZL80 was devoid of acute diazepam-like respiratory depression and chronic liver toxicity. CONCLUSION AND IMPLICATIONS Caspase-1 is essential for FS generation. CZL80 is a promising low MW inhibitor of FS and later enhanced epileptogenic susceptibility.
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Affiliation(s)
- Yangshun Tang
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Bo Feng
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yi Wang
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Huiyong Sun
- Department of Pharmachemistry, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yi You
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Jie Yu
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Bin Chen
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Cenglin Xu
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yeping Ruan
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Sunliang Cui
- Department of Pharmachemistry, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Gang Hu
- Department of Pharmacology, School of Medicine and Life Sciences, Nanjing University of Chinese Medicine, Nanjing, China
| | - Tingjun Hou
- Department of Pharmachemistry, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Zhong Chen
- Institute of Pharmacology and Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China
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11
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Liu Y, Duan Y, Du D, Chen F. Rescuing Kv10.2 protein changes cognitive and emotional function in kainic acid-induced status epilepticus rats. Epilepsy Behav 2020; 106:106894. [PMID: 32222671 DOI: 10.1016/j.yebeh.2019.106894] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/27/2019] [Accepted: 12/27/2019] [Indexed: 10/24/2022]
Abstract
Voltage-gated potassium (Kv) channels are widely expressed in the central and peripheral nervous system and are crucial mediators of neuronal excitability. Importantly, these channels also actively participate in cellular and molecular signaling pathways that regulate the life and death processes of neurons. The current study used a kainic acid (KA)-induced temporal lobe epilepsy model to examine the role of the Kv10.2 gene in status epilepticus (SE). Lentiviral plasmids containing the coding sequence region of the KCNH5 gene (LV-KCNH5) were injected into the CA3 subarea of the right dorsal hippocampus within 24 h in post-SE rats to rescue Kv10.2 protein expression. Open-field and elevated plus maze test results indicated that anxiety-like behavior was ameliorated in the KA + LV-KCNH5 group rats compared with the SE group rats, and working memory was improved in the Y-maze test. However, the spatial reference memory of the LV-KCNH5 group rats did not improve in the Morris water maze test, and no difference was found in the light-dark transition box test. The results of this study indicate that Kv10.2 protein may play an important role in epilepsy, providing new potential therapeutic directions and drug targets for epilepsy treatment.
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Affiliation(s)
- Yamei Liu
- School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| | - Yanhong Duan
- Key Laboratory of Brain Functional Genomics, Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, PR China
| | - Dongshu Du
- School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| | - Fuxue Chen
- School of Life Sciences, Shanghai University, Shanghai 200444, PR China.
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12
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Alese OO, Mabandla MV. Transgenerational deep sequencing revealed hypermethylation of hippocampal mGluR1 gene with altered mRNA expression of mGluR5 and mGluR3 associated with behavioral changes in Sprague Dawley rats with history of prolonged febrile seizure. PLoS One 2019; 14:e0225034. [PMID: 31710636 PMCID: PMC6844483 DOI: 10.1371/journal.pone.0225034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/27/2019] [Indexed: 02/04/2023] Open
Abstract
The impact of febrile seizure has been shown to transcend immediate generation with the alteration of glutamatergic pathway being implicated. However, transgenerational effects of this neurological disorder particularly prolonged febrile seizure (PFS) on neurobehavioral study and methylation profile is unknown. We therefore hypothesized that transgenerational impact of prolonged febrile seizure is dependent on methylation of hippocampal mGluR1 gene. Prolonged febrile seizure was induced on post-natal day (PND) 14, by injecting lipopolysaccharide (LPS; 217μg/kg ip) and kainic acid (KA; 1.83 mg/kg ip). Sucrose preference test (SPT) and Forced swim test (FST) were carried out in the first generation (F0) of animals at PND37 and PND60. The F0 rats were decapitated at PND 14, 37 and 60 which corresponded to childhood, adolescent and adulthood respectively and their hippocampal tissue collected. The second generation (F1) rats were obtained by mating F0 generation at PND 60 across different groups, F1 rats were subjected to SPT and FST test on PND 37 only. Decapitation of F1rats and collection of hippocampal tissues were done on PND 14 and 37. Assessment of mGluR5 and mGluR3 mRNA was done with PCR while mGluR1 methylation profile was assessed with the Quantitative MassARRAY analysis. Results showed that PFS significantly leads to decreased sucrose consumption in the SPT and increased immobility time in the FST in both generations of rats. It also leads to significant decrease in mGluR5 mRNA expression with a resultant increased expression of mGluR3 mRNA expression and hypermethylation of mGluR1 gene across both generations of rats. This study suggested that PFS led to behavioral changes which could be transmitted on to the next generation in rats.
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MESH Headings
- Animals
- Base Sequence
- Behavior, Animal
- DNA Methylation/genetics
- High-Throughput Nucleotide Sequencing
- Hippocampus/metabolism
- Immobilization
- Promoter Regions, Genetic/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats, Sprague-Dawley
- Receptor, Metabotropic Glutamate 5/genetics
- Receptor, Metabotropic Glutamate 5/metabolism
- Receptors, Metabotropic Glutamate/genetics
- Receptors, Metabotropic Glutamate/metabolism
- Seizures, Febrile/genetics
- Sucrose
- Swimming
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Affiliation(s)
- Oluwole Ojo Alese
- Department of Human Physiology, College of Health Sciences, University of Kwazulu-Natal, Durban, South Africa
| | - Musa V. Mabandla
- Department of Human Physiology, College of Health Sciences, University of Kwazulu-Natal, Durban, South Africa
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13
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Dai YJ, Wu DC, Feng B, Chen B, Tang YS, Jin MM, Zhao HW, Dai HB, Wang Y, Chen Z. Prolonged febrile seizures induce inheritable memory deficits in rats through DNA methylation. CNS Neurosci Ther 2019; 25:601-611. [PMID: 30666786 PMCID: PMC6488897 DOI: 10.1111/cns.13088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/08/2018] [Accepted: 11/10/2018] [Indexed: 01/08/2023] Open
Abstract
Aims Febrile seizures (FSs) are the most common types of seizures in young children. However, little is known whether the memory deficits induced by early‐life FSs could transmit across generations or not. Methods The memory functions of different generations of FS rats were behaviorally evaluated by morris water maze, inhibitory avoidance task, and contextual fear conditioning task. Meanwhile, molecular biology and pharmacological methods were used to investigate the role of DNA methylation in transgenerational transmission of memory defects. Results Prolonged FSs in infant rats resulted in memory deficits in adult and transgenerationally transmitted to next generation, which was mainly through mothers. For these two generations, DNA methyltransferase (DNMT) 1 was upregulated, leading to transcriptional inhibition of the synaptic plasticity protein reelin but not the memory suppressor protein phosphatase 1. DNMT inhibitors prevented the high expression of DNMT1 and hypermethylation of reelin gene and reversed the transgenerationally memory deficits. In addition, enriched environment in juvenile rats rescued memory deficits induced by prolonged FSs. Conclusions Our study demonstrated early experience of prolonged FSs led to memory deficits in adult rats and their unaffected offspring, which involved epigenetic mechanisms, suggesting early environmental experiences had a significant impact on the transgenerational transmission of neurological diseases.
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Affiliation(s)
- Yun-Jian Dai
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,Department of Pharmacy, Second Affiliated hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Deng-Chang Wu
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Bo Feng
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Bin Chen
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yang-Shun Tang
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Miao-Miao Jin
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Hua-Wei Zhao
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,Department of Pharmacy, School of Medicine, Children's hospital, Zhejiang University, Hangzhou, China
| | - Hai-Bin Dai
- Department of Pharmacy, Second Affiliated hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Epilepsy Center, Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Yi Wang
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Zhong Chen
- Institute of Pharmacology & Toxicology, NHC and CAMS Key Laboratory of Medical Neurobiology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.,Epilepsy Center, Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
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