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Tanioka M, Park WK, Shim I, Kim K, Choi S, Kim UJ, Lee KH, Hong SK, Lee BH. Neuroprotection from Excitotoxic Injury by Local Administration of Lipid Emulsion into the Brain of Rats. Int J Mol Sci 2020; 21:ijms21082706. [PMID: 32295117 PMCID: PMC7215821 DOI: 10.3390/ijms21082706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/10/2020] [Accepted: 04/12/2020] [Indexed: 01/10/2023] Open
Abstract
Lipid emulsion was recently shown to attenuate cell death caused by excitotoxic conditions in the heart. There are key similarities between neurons and cardiomyocytes, such as excitability and conductibility, which yield vulnerability to excitotoxic conditions. However, systematic investigations on the protective effects of lipid emulsion in the central nervous system are still lacking. This study aimed to determine the neuroprotective effects of lipid emulsion in an in vivo rat model of kainic acid-induced excitotoxicity through intrahippocampal microinjections. Kainic acid and/or lipid emulsion-injected rats were subjected to the passive avoidance test and elevated plus maze for behavioral assessment. Rats were sacrificed at 24 h and 72 h after kainic acid injections for molecular study, including immunoblotting and qPCR. Brains were also cryosectioned for morphological analysis through cresyl violet staining and Fluorojade-C staining. Anxiety and memory functions were significantly preserved in 1% lipid emulsion-treated rats. Lipid emulsion was dose-dependent on the protein expression of β-catenin and the phosphorylation of GSK3-β and Akt. Wnt1 mRNA expression was elevated in lipid emulsion-treated rats compared to the vehicle. Neurodegeneration was significantly reduced mainly in the CA1 region with increased cell survival. Our results suggest that lipid emulsion has neuroprotective effects against excitotoxic conditions in the brain and may provide new insight into its potential therapeutic utility.
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Affiliation(s)
- Motomasa Tanioka
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea; (M.T.); (K.K.); (S.C.); (U.J.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Wyun Kon Park
- Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea;
| | - Insop Shim
- Department of Physiology, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Kyeongmin Kim
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea; (M.T.); (K.K.); (S.C.); (U.J.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Songyeon Choi
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea; (M.T.); (K.K.); (S.C.); (U.J.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Un Jeng Kim
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea; (M.T.); (K.K.); (S.C.); (U.J.K.)
| | - Kyung Hee Lee
- Department of Dental Hygiene, Division of Health Science, Dongseo University, Busan 47011, Korea;
| | - Seong-Karp Hong
- Division of Biomedical Engineering, Mokwon University, Daejeon 35349, Korea;
| | - Bae Hwan Lee
- Department of Physiology, Yonsei University College of Medicine, Seoul 03722, Korea; (M.T.); (K.K.); (S.C.); (U.J.K.)
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
- Correspondence: ; Tel.: + 82-2-2228-1711
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Bourin M. Experimental Anxiety Model for Anxiety Disorders: Relevance to Drug Discovery. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1191:169-184. [DOI: 10.1007/978-981-32-9705-0_11] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Budylin T, Guariglia SR, Duran LI, Behring BM, Shaikh Z, Neuwirth LS, Banerjee P. Ultrasonic vocalization sex differences in 5-HT-R deficient mouse pups: Predictive phenotypes associated with later-life anxiety-like behaviors. Behav Brain Res 2019; 373:112062. [DOI: 10.1016/j.bbr.2019.112062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 01/26/2023]
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Maksimovskiy AL, Oot EN, Seraikas AM, Rieselbach M, Caine C, Sneider JT, Cohen-Gilbert JE, Harris SK, Nickerson LD, Rohan ML, Silveri MM. Morphometric Biomarkers of Adolescents With Familial Risk for Alcohol Use Disorder. Alcohol Clin Exp Res 2019; 43:2354-2366. [PMID: 31529792 DOI: 10.1111/acer.14201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 09/11/2019] [Indexed: 12/01/2022]
Abstract
BACKGROUND While many adolescents exhibit risky behavior, teenagers with a family history (FH+) of an alcohol use disorder (AUD) are at a heightened risk for earlier initiation of alcohol use, a more rapid escalation in frequency and quantity of alcohol consumption and developing a subsequent AUD in comparison with youth without such family history (FH-). Neuroanatomically, developmentally normative risk-taking behavior parallels an imbalance between more protracted development of the prefrontal cortex (PFC) and earlier development of limbic regions. Magnetic resonance imaging (MRI)-derived volumetric properties were obtained for these structures in FH+ and FH- adolescents. METHODS Forty-two substance-naïve adolescents (13- to 14-year-olds), stratified into FH+ (N = 19, 13 girls) and FH- (N = 23, 11 girls) age/handedness-matched groups, completed MRI scanning at 3.0T, as well as cognitive and clinical testing. T1 images were processed using FreeSurfer to measure PFC and hippocampi/amygdalae subfields/nuclei volumes. RESULTS FH+ status was associated with larger hippocampal/amygdala volumes (p < 0.05), relative to FH- adolescents, with right amygdala results appearing to be driven by FH+ boys. Volumetric differences also were positively associated with family history density (p < 0.05) of having an AUD. Larger subfields/nuclei volumes were associated with higher anxiety levels and worse auditory verbal learning performance (p < 0.05). CONCLUSIONS FH+ risk for AUD is detectable via neuromorphometric characteristics, which precede alcohol use onset and the potential onset of a later AUD, that are associated with emotional and cognitive measures. It is plausible that the development of limbic regions might be altered in FH+ youth, even prior to the onset of alcohol use, which could increase later risk. Thus, targeted preventative measures are warranted that serve to delay the onset of alcohol use in youth, particularly in those who are FH+ for an AUD.
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Affiliation(s)
- Arkadiy L Maksimovskiy
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts.,Department of Psychiatry, Harvard Medical School, Boston, Massachusetts
| | - Emily N Oot
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts.,Boston University School of Medicine, Boston, Massachusetts
| | - Anna M Seraikas
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts
| | - Maya Rieselbach
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts
| | - Carolyn Caine
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts
| | - Jennifer T Sneider
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts.,Department of Psychiatry, Harvard Medical School, Boston, Massachusetts
| | - Julia E Cohen-Gilbert
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts.,Department of Psychiatry, Harvard Medical School, Boston, Massachusetts
| | - Sion K Harris
- Boston Children's Hospital, Boston, Massachusetts.,Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
| | - Lisa D Nickerson
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts.,Applied Neuroimaging Statistics Lab, McLean Hospital, Belmont, Massachusetts
| | - Michael L Rohan
- Department of Psychiatry, Harvard Medical School, Boston, Massachusetts.,Brain Imaging Center, McLean Hospital, Belmont, Massachusetts
| | - Marisa M Silveri
- From the, Neurodevelopmental Laboratory on Addictions and Mental Health, McLean Hospital, Belmont, Massachusetts.,Department of Psychiatry, Harvard Medical School, Boston, Massachusetts.,Boston University School of Medicine, Boston, Massachusetts
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Pathology of nNOS-Expressing GABAergic Neurons in Mouse Model of Alzheimer's Disease. Neuroscience 2018; 384:41-53. [PMID: 29782905 DOI: 10.1016/j.neuroscience.2018.05.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 05/04/2018] [Accepted: 05/10/2018] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD) is the most common form of dementia that is often accompanied by mood and emotional disturbances and seizures. There is growing body of evidence that neurons expressing γ-aminobutyric acid (GABA) play an important role in regulation of cognition, mood, and emotion as well as seizure susceptibility, but participation of GABAergic neuronal pathology in Alzheimer's disease (AD) is not understood well at present. Here, we report that transgenic mice expressing human amyloid precursor protein Swedish-Dutch-Iowa mutant (APPSweDI) exhibit early loss of neurons expressing GAD67, a GABA-synthesizing enzyme, in advance of the loss of pyramidal neurons in hippocampal CA1 region. The loss of GAD67+ neurons in APPSweDI mice accompanied with decreased spatial cognition as well as increased anxiety-like behaviors and kainic acid-induced seizure susceptibility at early phase. In the hippocampal CA1 region, GAD67+ neurons expressed high basal levels of neuronal nitric oxide synthase (nNOS) and nitrosative stress (nitrotyrosine). Similarly, GAD67+ neurons in primary cortical and hippocampal neuron cultures also expressed high basal levels of nNOS and degenerated in response to lower Aβ concentrations due to their high basal levels of nitrosative stress. Given the role of GABAergic neurons in cognitive and neuropsychiatric functions, this study reports the role of nNOS-mediated nitrosative stress in dysfunction of GABAergic neurons and its potential participation in early development of cognitive and neuropsychiatric symptoms in AD.
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Too Depressed to Swim or Too Afraid to Stop? A Reinterpretation of the Forced Swim Test as a Measure of Anxiety-Like Behavior. Neuropsychopharmacology 2018; 43:931-933. [PMID: 29210364 PMCID: PMC5854810 DOI: 10.1038/npp.2017.260] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/22/2017] [Accepted: 10/24/2017] [Indexed: 11/08/2022]
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Fernandez SP, Muzerelle A, Scotto-Lomassese S, Barik J, Gruart A, Delgado-García JM, Gaspar P. Constitutive and Acquired Serotonin Deficiency Alters Memory and Hippocampal Synaptic Plasticity. Neuropsychopharmacology 2017; 42:512-523. [PMID: 27461084 PMCID: PMC5399229 DOI: 10.1038/npp.2016.134] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 07/07/2016] [Accepted: 07/17/2016] [Indexed: 02/06/2023]
Abstract
Serotonin (5-HT) deficiency occurs in a number of brain disorders that affect cognitive function. However, a direct causal relationship between 5-HT hypo-transmission and memory and underlying mechanisms has not been established. We used mice with a constitutive depletion of 5-HT brain levels (Pet1KO mice) to analyze the contribution of 5-HT to different forms of learning and memory. Pet1KO mice exhibited a striking deficit in novel object recognition memory, a hippocampal-dependent task. No alterations were found in tasks for social recognition, procedural learning, or fear memory. Viral delivery of designer receptors exclusively activated by designer drugs was used to selectively silence the activity of 5-HT neurons in the raphe. Inhibition of 5-HT neurons in the median raphe, but not the dorsal raphe, was sufficient to impair object recognition in adult mice. In vivo electrophysiology in behaving mice showed that long-term potentiation in the hippocampus of 5-HT-deficient mice was altered, and administration of the 5-HT1A agonist 8-OHDPAT rescued the memory deficits. Our data suggest that hyposerotonergia selectively affects declarative hippocampal-dependent memory. Serotonergic projections from the median raphe are necessary to regulate object memory and hippocampal synaptic plasticity processes, through an inhibitory control mediated by 5-HT1A receptors.
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Affiliation(s)
- Sebastian P Fernandez
- Institut du Fer à Moulin, Paris, France,INSERM, UMRS-839, Paris, France,University Pierre and Marie Curie, Paris, France,Institut de Pharmacologie Moléculaire et Cellulaire (IPMC), Université Côte d'Azur, CNRS UMR 7275, Valbonne, 0656, France, Tel: +33 4 93 95 34 41, Fax: +33 4 93 95 34 08, E-mail:
| | - Aude Muzerelle
- Institut du Fer à Moulin, Paris, France,INSERM, UMRS-839, Paris, France,University Pierre and Marie Curie, Paris, France
| | - Sophie Scotto-Lomassese
- Institut du Fer à Moulin, Paris, France,INSERM, UMRS-839, Paris, France,University Pierre and Marie Curie, Paris, France
| | - Jacques Barik
- Université Côte d'Azur, CNRS, IPMC, Valbonne, France
| | - Agnès Gruart
- Division of Neurosciences, Pablo de Olavide University, Seville, Spain
| | | | - Patricia Gaspar
- Institut du Fer à Moulin, Paris, France,INSERM, UMRS-839, Paris, France,University Pierre and Marie Curie, Paris, France
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Concordance and incongruence in preclinical anxiety models: Systematic review and meta-analyses. Neurosci Biobehav Rev 2016; 68:504-529. [PMID: 27328783 DOI: 10.1016/j.neubiorev.2016.04.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/19/2016] [Accepted: 04/18/2016] [Indexed: 12/14/2022]
Abstract
Rodent defense behavior assays have been widely used as preclinical models of anxiety to study possibly therapeutic anxiety-reducing interventions. However, some proposed anxiety-modulating factors - genes, drugs and stressors - have had discordant effects across different studies. To reconcile the effect sizes of purported anxiety factors, we conducted systematic review and meta-analyses of the literature on ten anxiety-linked interventions, as examined in the elevated plus maze, open field and light-dark box assays. Diazepam, 5-HT1A receptor gene knockout and overexpression, SERT gene knockout and overexpression, pain, restraint, social isolation, corticotropin-releasing hormone and Crhr1 were selected for review. Eight interventions had statistically significant effects on rodent anxiety, while Htr1a overexpression and Crh knockout did not. Evidence for publication bias was found in the diazepam, Htt knockout, and social isolation literatures. The Htr1a and Crhr1 results indicate a disconnect between preclinical science and clinical research. Furthermore, the meta-analytic data confirmed that genetic SERT anxiety effects were paradoxical in the context of the clinical use of SERT inhibitors to reduce anxiety.
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Dissociating the therapeutic effects of environmental enrichment and exercise in a mouse model of anxiety with cognitive impairment. Transl Psychiatry 2016; 6:e794. [PMID: 27115125 PMCID: PMC4872410 DOI: 10.1038/tp.2016.52] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 02/15/2016] [Accepted: 02/22/2016] [Indexed: 01/22/2023] Open
Abstract
Clinical evidence indicates that serotonin-1A receptor (5-HT1AR) gene polymorphisms are associated with anxiety disorders and deficits in cognition. In animal models, exercise (Ex) and environmental enrichment (EE) can change emotionality-related behaviours, as well as enhance some aspects of cognition and hippocampal neurogenesis. We investigated the effects of Ex and EE (which does not include running wheels) on cognition and anxiety-like behaviours in wild-type (WT) and 5-HT1AR knock-out (KO) mice. Using an algorithm-based classification of search strategies in the Morris water maze, we report for we believe the first time that Ex increased the odds for mice to select more hippocampal-dependent strategies. In the retention probe test, Ex (but not EE) corrected long-term spatial memory deficits displayed by KO mice. In agreement with these findings, only Ex increased hippocampal cell survival and BDNF protein levels. However, only EE (but not Ex) modified anxiety-like behaviours, demonstrating dissociation between improvements in cognition and innate anxiety. EE enhanced hippocampal cell proliferation in WT mice only, suggesting a crucial role for intact serotonergic signalling in mediating this effect. Together, these results demonstrate differential effects of Ex vs EE in a mouse model of anxiety with cognitive impairment. Overall, the 5-HT1AR does not seem to be critical for those behavioural effects to occur. These findings will have implications for our understanding of how Ex and EE enhance experience-dependent plasticity, as well as their differential impacts on anxiety and cognition.
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Kim MH, Leem YH. Chronic exercise improves repeated restraint stress-induced anxiety and depression through 5HT1A receptor and cAMP signaling in hippocampus. J Exerc Nutrition Biochem 2014; 18:97-104. [PMID: 25566444 PMCID: PMC4241932 DOI: 10.5717/jenb.2014.18.1.97] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 02/05/2014] [Accepted: 02/26/2014] [Indexed: 11/11/2022] Open
Abstract
[Purpose] Mood disorders such as anxiety and depression are prevalent psychiatric illness, but the role of 5HT1A in the anti-depressive effects of exercise has been rarely known yet. We investigated whether long-term exercise affected a depressive-like behavior and a hippocampal 5HT1A receptor-mediated cAMP/PKA/CREB signaling in depression mice model. [Methods] To induce depressive behaviors, mice were subjected to 14 consecutive days of restraint stress (2 hours/day). Depression-like behaviors were measured by forced swimming test (TST), and anxiety-like behavior was assessed by elevated plus maze (EPM). Treadmill exercise was performed with 19 m/min for 60 min/day, 5 days/week from weeks 0 to 8. Restraint stress was started at week 6 week and ended at week 8. To elucidate the role of 5HT1A in depression, the immunoreactivities of 5HT1A were detected in hippocampus using immunohistochemical technique. [Results] Chronic/repeated restraint stress induced behavioral anxiety and depression, such as reduced time and entries in open arms in EPM and enhanced immobility time in FST. These anxiety and depressive behaviors were ameliorated by chronic exercise. Also, these behavioral changes were concurrent with the deficit of 5HT1A and cAMP/PKA/CREB cascade in hippocampus, which was coped with chronic exercise. [Conclusion] These results suggest that chronic exercise may improve the disturbance of hippocampal 5HT1A-regulated cAMP/PKA/CREB signaling in a depressed brain, thereby exerting an antidepressive action.
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Affiliation(s)
- Mun Hee Kim
- Exercise Biochemistry Laboratory, Korea National Sport University, Seoul, Korea
| | - Yea Hyun Leem
- Department of Pharmacy, College of Pharmacy, Dankook University, Cheonan-si, Korea
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Ali I, O'Brien P, Kumar G, Zheng T, Jones NC, Pinault D, French C, Morris MJ, Salzberg MR, O'Brien TJ. Enduring Effects of Early Life Stress on Firing Patterns of Hippocampal and Thalamocortical Neurons in Rats: Implications for Limbic Epilepsy. PLoS One 2013; 8:e66962. [PMID: 23825595 PMCID: PMC3688984 DOI: 10.1371/journal.pone.0066962] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 05/13/2013] [Indexed: 12/03/2022] Open
Abstract
Early life stress results in an enduring vulnerability to kindling-induced epileptogenesis in rats, but the underlying mechanisms are not well understood. Recent studies indicate the involvement of thalamocortical neuronal circuits in the progression of kindling epileptogenesis. Therefore, we sought to determine in vivo the effects of early life stress and amygdala kindling on the firing pattern of hippocampus as well as thalamic and cortical neurons. Eight week old male Wistar rats, previously exposed to maternal separation (MS) early life stress or early handling (EH), underwent amygdala kindling (or sham kindling). Once fully kindled, in vivo juxtacellular recordings in hippocampal, thalamic and cortical regions were performed under neuroleptic analgesia. In the thalamic reticular nucleus cells both kindling and MS independently lowered firing frequency and enhanced burst firing. Further, burst firing in the thalamic reticular nucleus was significantly increased in kindled MS rats compared to kindled EH rats (p<0.05). In addition, MS enhanced burst firing of hippocampal pyramidal neurons. Following a stimulation-induced seizure, somatosensory cortical neurons exhibited a more pronounced increase in burst firing in MS rats than in EH rats. These data demonstrate changes in firing patterns in thalamocortical and hippocampal regions resulting from both MS and amygdala kindling, which may reflect cellular changes underlying the enhanced vulnerability to kindling in rats that have been exposed to early life stress.
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Affiliation(s)
- Idrish Ali
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Patrick O'Brien
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Gaurav Kumar
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Thomas Zheng
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Nigel C. Jones
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Didier Pinault
- INSERM U1114, Physiopathologie et psychopathologie de la schizophrénie, Strasbourg, France
- Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Strasbourg, France
| | - Chris French
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
| | - Margaret J. Morris
- Department of Pharmacology, School of Medical Sciences, University of New South Wales, New South Wales, Australia
| | - Michael R. Salzberg
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
- Department of Psychiatry, St. Vincent's Hospital, University of Melbourne, Victoria, Australia
| | - Terence J. O'Brien
- Department of Medicine, the Royal Melbourne Hospital, University of Melbourne, Victoria, Australia
- Department of Neurology, the Royal Melbourne Hospital, Melbourne, Victoria, Australia
- * E-mail:
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McAllister B, Kiryanova V, Dyck R. Behavioural outcomes of perinatal maternal fluoxetine treatment. Neuroscience 2012; 226:356-66. [DOI: 10.1016/j.neuroscience.2012.09.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 09/09/2012] [Accepted: 09/11/2012] [Indexed: 11/28/2022]
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Quantification of extracellular levels of corticosterone in the basolateral amygdaloid complex of freely-moving rats: A dialysis study of circadian variation and stress-induced modulation. Brain Res 2012; 1452:47-60. [DOI: 10.1016/j.brainres.2012.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 11/16/2011] [Accepted: 01/07/2012] [Indexed: 12/31/2022]
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14
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de Miranda AS, Rodrigues DH, Amaral DCG, de Lima Campos RD, Cisalpino D, Vilela MC, Lacerda-Queiroz N, de Souza KPR, Vago JP, Campos MA, Kroon EG, da Glória de Souza D, Teixeira MM, Teixeira AL, Rachid MA. Dengue-3 encephalitis promotes anxiety-like behavior in mice. Behav Brain Res 2012; 230:237-42. [PMID: 22366269 DOI: 10.1016/j.bbr.2012.02.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 02/08/2012] [Accepted: 02/09/2012] [Indexed: 10/28/2022]
Abstract
Dengue virus is a human pathogen that may cause meningoencephalitis and other neurological syndromes. The current study investigated anxiety-like behavior and expression of proinflammatory cytokines and pro-apoptotic caspase-3 in the hippocampus of C57BL/6 mice infected with non-adapted Dengue virus 3 genotype I (DENV-3) inoculated intracranially with 4×10(3) (plaque-forming unit) PFU. Anxiety-like behavior was assessed in control and DENV-3 infected mice using the elevated plus maze. The open field test was performed to evaluate locomotor activity. Histopathological changes in CA regions of the hippocampus were assessed by haematoxylin and eosin staining. Immunoreactive and protein levels of cleaved caspase-3 were also analyzed in the hippocampus. The mRNA expression of IL-6 and TNF-α in the hippocampus were estimated by quantitative real time (polymerase chain reaction) PCR. All procedures were conducted on day 5 post-infection. We found that DENV-3 infected mice presented higher levels of anxiety in comparison with controls (p≤0.05). No difference in motor activity was found between groups (p=0.77). The infection was followed by a significant increase of TNF-α and IL-6 mRNA expression in the hippocampus (p≤0.05). Histological analysis demonstrated meningoencephalitis with formation of perivascular cuffs, infiltration of immune cells and loss of neurons at CA regions of hippocampus. Numerous caspase-3 positive neurons were visualized at CA areas in DENV-3 infected mice. Marked increase of cleaved caspase-3 levels were observed after infection. This study described anxiety-like behavior, hippocampal inflammation and neuronal apoptosis associated with DENV-3 infection in the central nervous system.
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Affiliation(s)
- Aline Silva de Miranda
- Departamento de Clínica Médica, Faculdade de Medicina, Instituto de Ciências Biológicas (ICB), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
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