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Sheng ZF, Zhang H, Phaup JG, Zheng P, Kang X, Liu Z, Chang HM, Yeh ETH, Johnson AK, Pan HL, Li DP. Corticotropin-releasing hormone neurons in the central nucleus of amygdala are required for chronic stress-induced hypertension. Cardiovasc Res 2023; 119:1751-1762. [PMID: 37041718 PMCID: PMC10325697 DOI: 10.1093/cvr/cvad056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 11/30/2022] [Accepted: 04/08/2023] [Indexed: 04/13/2023] Open
Abstract
AIMS Chronic stress is a well-known risk factor for the development of hypertension. However, the underlying mechanisms remain unclear. Corticotropin-releasing hormone (CRH) neurons in the central nucleus of the amygdala (CeA) are involved in the autonomic responses to chronic stress. Here, we determined the role of CeA-CRH neurons in chronic stress-induced hypertension. METHODS AND RESULTS Borderline hypertensive rats (BHRs) and Wistar-Kyoto (WKY) rats were subjected to chronic unpredictable stress (CUS). Firing activity and M-currents of CeA-CRH neurons were assessed, and a CRH-Cre-directed chemogenetic approach was used to suppress CeA-CRH neurons. CUS induced a sustained elevation of arterial blood pressure (ABP) and heart rate (HR) in BHRs, while in WKY rats, CUS-induced increases in ABP and HR quickly returned to baseline levels after CUS ended. CeA-CRH neurons displayed significantly higher firing activities in CUS-treated BHRs than unstressed BHRs. Selectively suppressing CeA-CRH neurons by chemogenetic approach attenuated CUS-induced hypertension and decreased elevated sympathetic outflow in CUS-treated BHRs. Also, CUS significantly decreased protein and mRNA levels of Kv7.2 and Kv7.3 channels in the CeA of BHRs. M-currents in CeA-CRH neurons were significantly decreased in CUS-treated BHRs compared with unstressed BHRs. Blocking Kv7 channel with its blocker XE-991 increased the excitability of CeA-CRH neurons in unstressed BHRs but not in CUS-treated BHRs. Microinjection of XE-991 into the CeA increased sympathetic outflow and ABP in unstressed BHRs but not in CUS-treated BHRs. CONCLUSIONS CeA-CRH neurons are required for chronic stress-induced sustained hypertension. The hyperactivity of CeA-CRH neurons may be due to impaired Kv7 channel activity, which represents a new mechanism involved in chronic stress-induced hypertension.
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Affiliation(s)
- Zhao-Fu Sheng
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - Hua Zhang
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - Jeffery G Phaup
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - PeiRu Zheng
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - XunLei Kang
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - Zhenguo Liu
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
| | - Hui-Ming Chang
- Department of Pharmacology, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
- Department of Toxicology, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
- Department of Internal Medicine, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
| | - Edward T H Yeh
- Department of Pharmacology, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
- Department of Toxicology, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
- Department of Internal Medicine, The University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
| | - Alan Kim Johnson
- Department of Psychological and Brain Sciences, The University of Iowa, G60 Psychological and Brain Sciences Building, Iowa City, IA 52242, USA
| | - Hui-Lin Pan
- Department of Anesthesiology and Perioperative Medicine, The University of Texas, MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA
| | - De-Pei Li
- Center for Precision Medicine, Department of Medicine, School of Medicine University of Missouri, One Hospital Drive, Columbia, MO 65212, USA
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Liu Y, Li S, Zhang X, Wang L, Li Z, Wu W, Qin X, Zhou J, Ma C, Meng W, Kuang X, Yin F, Xia Q, Jiang B, Yang Y. Corticotropin releasing factor neurons in the visual cortex mediate long-term changes in visual function induced by early adversity. Neurobiol Stress 2022; 21:100504. [DOI: 10.1016/j.ynstr.2022.100504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022] Open
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Lichlyter DA, Krumm ZA, Golde TA, Doré S. Role of CRF and the hypothalamic-pituitary-adrenal axis in stroke: revisiting temporal considerations and targeting a new generation of therapeutics. FEBS J 2022; 290:1986-2010. [PMID: 35108458 DOI: 10.1111/febs.16380] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 12/10/2021] [Accepted: 01/31/2022] [Indexed: 12/13/2022]
Abstract
Ischaemic neurovascular stroke represents a leading cause of death in the developed world. Preclinical and human epidemiological evidence implicates the corticotropin-releasing factor (CRF) family of neuropeptides as mediators of acute neurovascular injury pathology. Preclinical investigations of the role of CRF, CRF receptors and CRF-dependent activation of the hypothalamic-pituitary-adrenal (HPA) axis have pointed toward a tissue-specific and temporal relationship between activation of these pathways and physiological outcomes. Based on the literature, the major phases of ischaemic stroke aetiology may be separated into an acute phase in which CRF and anti-inflammatory stress signalling are beneficial and a chronic phase in which these contribute to neural degeneration, toxicity and apoptotic signalling. Significant gaps in knowledge remain regarding the pathway, temporality and systemic impact of CRF signalling and stress biology in neurovascular injury progression. Heterogeneity among experimental designs poses a challenge to defining the apparent reciprocal relationship between neurological injury and stress metabolism. Despite these challenges, it is our opinion that the elucidated temporality may be best matched with an antibody against CRF with a half-life of days to weeks as opposed to minutes to hours as with small-molecule CRF receptor antagonists. This state-of-the-art review will take a multipronged approach to explore the expected potential benefit of a CRF antibody by modulating CRF and corticotropin-releasing factor receptor 1 signalling, glucocorticoids and autonomic nervous system activity. Additionally, this review compares the modulation of CRF and HPA axis activity in neuropsychiatric diseases and their counterpart outcomes post-stroke and assess lessons learned from antibody therapies in neurodegenerative diseases.
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Affiliation(s)
- Daniel A Lichlyter
- Department of Anesthesiology, University of Florida College of Medicine, Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, USA
| | - Zachary A Krumm
- Department of Neuroscience, University of Florida College of Medicine, Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, USA
| | - Todd A Golde
- Department of Neuroscience, University of Florida College of Medicine, Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, USA
| | - Sylvain Doré
- Department of Anesthesiology, University of Florida College of Medicine, Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, USA.,Department of Neuroscience, University of Florida College of Medicine, Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, USA.,Departments of Neurology, Psychiatry, Pharmaceutics, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, USA
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Moraes DA, Machado RB, Koban M, Hoffman GE, Suchecki D. The Pituitary-Adrenal Response to Paradoxical Sleep Deprivation Is Similar to a Psychological Stressor, Whereas the Hypothalamic Response Is Unique. Front Endocrinol (Lausanne) 2022; 13:885909. [PMID: 35880052 PMCID: PMC9308007 DOI: 10.3389/fendo.2022.885909] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/03/2022] [Indexed: 11/25/2022] Open
Abstract
Stressors of different natures induce activation of the hypothalamic-pituitary-adrenal (HPA) axis at different magnitudes. Moreover, the HPA axis response to repeated exposure is usually distinct from that elicited by a single session. Paradoxical sleep deprivation (PSD) augments ACTH and corticosterone (CORT) levels, but the nature of this stimulus is not yet defined. The purpose of the present study was to qualitatively compare the stress response of animals submitted to PSD to that of rats exposed once or four times to cold, as a physiological stress, movement restraint (RST) as a mixed stressor and predator odour (PRED) as the psychological stressor, whilst animals were submitted for 1 or 4 days to PSD and respective control groups. None of the stressors altered corticotropin releasing factor immunoreactivity in the paraventricular nucleus of the hypothalamus (PVN), median eminence (ME) or central amygdala, compared to control groups, whereas vasopressin immunoreactivity in PSD animals was decreased in the PVN and increased in the ME, indicating augmented activity of this system. ACTH levels were higher after repeated stress or prolonged PSD than after single- or 1 day-exposure and control groups, whereas the CORT response was habituated by repeated stress, but not by 4-days PSD. This dissociation resulted in changes in the CORT : ACTH ratio, with repeated cold and RST decreasing the ratio compared to single exposure, but no change was seen in PRED and PSD groups. Comparing the magnitude and pattern of pituitary-adrenal response to the different stressors, PSD-induced responses were closer to that shown by PRED-exposed rats. In contrast, the hypothalamic response of PSD-exposed rats was unique, inasmuch as this was the only stressor which increased the activity of the vasopressin system. In conclusion, we propose that the pituitary-adrenal response to PSD is similar to that induced by a psychological stressor.
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Affiliation(s)
- Danilo A. Moraes
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ricardo B. Machado
- Grupo de Pesquisa em Psicossomática, Universidade Ibirapuera, São Paulo, Brazil
| | - Michael Koban
- Department of Biology, Morgan State University, Baltimore, MD, United States
| | - Gloria E. Hoffman
- Department of Biology, Morgan State University, Baltimore, MD, United States
| | - Deborah Suchecki
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
- *Correspondence: Deborah Suchecki,
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Tafet GE, Nemeroff CB. Pharmacological Treatment of Anxiety Disorders: The Role of the HPA Axis. Front Psychiatry 2020; 11:443. [PMID: 32499732 PMCID: PMC7243209 DOI: 10.3389/fpsyt.2020.00443] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 05/01/2020] [Indexed: 12/13/2022] Open
Abstract
Stress in general, and early life stress in particular, has been associated with the development of anxiety and mood disorders. The molecular, biological and psychological links between stress exposure and the pathogenesis of anxiety and mood disorders have been extensively studied, resulting in the search of novel psychopharmacological strategies aimed at targets of the hypothalamic-pituitary-adrenal (HPA) axis. Hyperactivity of the HPA axis has been observed in certain subgroups of patients with anxiety and mood disorders. In addition, the effects of different anti-anxiety agents on various components of the HPA axis has been investigated, including benzodiazepines, tricyclic antidepressants (TCAs), and selective serotonin reuptake inhibitors (SSRIs). For example, benzodiazepines, including clonazepam and alprazolam, have been demonstrated to reduce the activity of corticotrophin releasing factor (CRF) neurons in the hypothalamus. TCAs and SSRIs are also effective anti-anxiety agents and these may act, in part, by modulating the HPA axis. In this regard, the SSRI escitalopram inhibits CRF release in the central nucleus of the amygdala, while increasing glucocorticoid receptor (GRs) density in the hippocampus and hypothalamus. The molecular effects of these anti-anxiety agents in the regulation of the HPA axis, taken together with their clinical efficacy, may provide further understanding about the role of the HPA axis in the pathophysiology of mood and anxiety disorders, paving the way for the development of novel therapeutic strategies.
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Affiliation(s)
- Gustavo E. Tafet
- Department of Psychiatry and Neurosciences, Maimónides University, Buenos Aires, Argentina
| | - Charles B. Nemeroff
- Department of Psychiatry, University of Texas at Austin, Austin, TX, United States
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6
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Luft C, Levices IP, Costa MS, Haute GV, Grassi‐Oliveira R, Oliveira JR, Donadio MVF. Exercise before pregnancy attenuates the effects of prenatal stress in adult mice in a sex‐dependent manner. Int J Dev Neurosci 2020; 80:86-95. [DOI: 10.1002/jdn.10001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 12/09/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Carolina Luft
- Laboratory of Pediatric Physical Activity Infant Center Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
- Laboratory of Cellular Biophysics and Inflammation Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Isadora Perez Levices
- Laboratory of Pediatric Physical Activity Infant Center Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Mariana Severo Costa
- Laboratory of Pediatric Physical Activity Infant Center Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Gabriela Viegas Haute
- Laboratory of Cellular Biophysics and Inflammation Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Rodrigo Grassi‐Oliveira
- Developmental Cognitive Neuroscience Laboratory (DCNL) Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Jarbas Rodrigues Oliveira
- Laboratory of Cellular Biophysics and Inflammation Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
| | - Márcio Vinícius Fagundes Donadio
- Laboratory of Pediatric Physical Activity Infant Center Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
- Laboratory of Cellular Biophysics and Inflammation Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
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Prakash N, Stark CJ, Keisler MN, Luo L, Der-Avakian A, Dulcis D. Serotonergic Plasticity in the Dorsal Raphe Nucleus Characterizes Susceptibility and Resilience to Anhedonia. J Neurosci 2020; 40:569-584. [PMID: 31792153 PMCID: PMC6961996 DOI: 10.1523/jneurosci.1802-19.2019] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 10/04/2019] [Accepted: 11/06/2019] [Indexed: 02/06/2023] Open
Abstract
Chronic stress induces anhedonia in susceptible but not resilient individuals, a phenomenon observed in humans as well as animal models, but the molecular mechanisms underlying susceptibility and resilience are not well understood. We hypothesized that the serotonergic system, which is implicated in stress, reward, and antidepressant therapy, may play a role. We found that plasticity of the serotonergic system contributes to the differential vulnerability to stress displayed by susceptible and resilient animals. Stress-induced anhedonia was assessed in adult male rats using social defeat and intracranial self-stimulation, while changes in serotonergic phenotype were investigated using immunohistochemistry and in situ hybridization. Susceptible, but not resilient, rats displayed an increased number of neurons expressing the biosynthetic enzyme for serotonin, tryptophan-hydroxylase-2 (TPH2), in the ventral subnucleus of the dorsal raphe nucleus (DRv). Further, a decrease in the number of DRv glutamatergic (VGLUT3+) neurons was observed in all stressed rats. This neurotransmitter plasticity is activity-dependent, as was revealed by chemogenetic manipulation of the central amygdala, a stress-sensitive nucleus that forms a major input to the DR. Activation of amygdalar corticotropin-releasing hormone (CRH)+ neurons abolished the increase in DRv TPH2+ neurons and ameliorated stress-induced anhedonia in susceptible rats. These findings show that activation of amygdalar CRH+ neurons induces resilience, and suppresses the gain of serotonergic phenotype in the DRv that is characteristic of susceptible rats. This molecular signature of vulnerability to stress-induced anhedonia and the active nature of resilience could be targeted to develop new treatments for stress-related disorders like depression.SIGNIFICANCE STATEMENT Depression and other mental disorders can be induced by chronic or traumatic stressors. However, some individuals are resilient and do not develop depression in response to chronic stress. A complete picture of the molecular differences between susceptible and resilient individuals is necessary to understand how plasticity of limbic circuits is associated with the pathophysiology of stress-related disorders. Using a rodent model, our study identifies a novel molecular marker of susceptibility to stress-induced anhedonia, a core symptom of depression, and a means to modulate it. These findings will guide further investigation into cellular and circuit mechanisms of resilience, and the development of new treatments for depression.
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Affiliation(s)
- Nandkishore Prakash
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
| | - Christiana J Stark
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
| | - Maria N Keisler
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
| | - Lily Luo
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
| | - Andre Der-Avakian
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
| | - Davide Dulcis
- Department of Psychiatry, University of California San Diego, La Jolla, California 92093
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Pandey GN, Rizavi HS, Bhaumik R, Ren X. Increased protein and mRNA expression of corticotropin-releasing factor (CRF), decreased CRF receptors and CRF binding protein in specific postmortem brain areas of teenage suicide subjects. Psychoneuroendocrinology 2019; 106:233-243. [PMID: 31005044 PMCID: PMC7061258 DOI: 10.1016/j.psyneuen.2019.04.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 03/07/2019] [Accepted: 04/10/2019] [Indexed: 10/27/2022]
Abstract
Overactivity of hypothalamic-pituitary-adrenal (HPA) axis function has been implicated in depression and suicidal behavior. This is based on the observation of an abnormal dexamethasone (DEX) and DEX-adrenocorticotropic hormone (ACTH) test in patients with depression and suicidal behavior. Recently, some studies have also found abnormalities of glucocorticoid receptors (GR), mineralocorticoid receptors (MR), corticotropin releasing factor (CRF), CRF receptors (CRF-R) and CRF binding protein (CRF-BP) in depressed and suicidal patients. Some investigators have also observed increased levels of CRF in the cerebrospinal fluid (CSF) and altered levels of MR, GR and CRF in the postmortem brain of depressed and suicidal subjects. We have earlier reported decreased protein and mRNA expression of GR and GILZ, a chaperone protein, in the postmortem brain of teenage suicide subjects. We have further studied CRF and its receptors in different areas of the postmortem brain of suicide subjects, i.e., the prefrontal cortex (PFC), hippocampus (HIPPO), subiculum and amygdala (AMY) from teenage suicide subjects. The CRF and its receptors were determined in the PFC (Brodmann area 9), HIPPO, subiculum and different amygdaloid nuclei from 24 normal control subjects and 24 teenage suicide subjects. Protein expression of CRF, its receptors and CRF-BP was determined by immunolabeling using the Western blot technique and mRNA expression was determined by real-time PCR (qPCR) technique. We found that the mRNA levels of CRF were significantly increased in the PFC, in the central amygdaloid nucleus (CeAMY) and in the subiculum. mRNA levels of CRF-R1 and CRF-BP were significantly decreased in the PFC. We did not find any changes in the HIPPO of any of the CRF components we studied. When we compared the protein expression of CRF components we found that CRF was significantly increased and CRF-R1, CRF-R2 and CRF-BP significantly decreased in the PFC. On the other hand, there were no changes in the protein expression of CRF components in the HIPPO. Our results in the postmortem brain suggest that, as found by clinical studies in the CSF, there are significant alterations of CRF and its receptors in the postmortem brain of teenage suicide subjects. These alterations of CRF and its components were region-specific, as changes were not generally observed in the HIPPO.
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Affiliation(s)
- Ghanshyam N. Pandey
- Corresponding Author: Ghanshyam N. Pandey, Ph.D., University of Illinois at Chicago, 1601 West Taylor Street, Chicago, IL 60612, USA, Phone (312) 413-4540, Fax: (312) 413-4547,
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9
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Loupy KM, Arnold MR, Hassell JE, Lieb MW, Milton LN, Cler KE, Fox JH, Siebler PH, Schmidt D, Noronha SISR, Day HEW, Lowry CA. Evidence that preimmunization with a heat-killed preparation of Mycobacterium vaccae reduces corticotropin-releasing hormone mRNA expression in the extended amygdala in a fear-potentiated startle paradigm. Brain Behav Immun 2019; 77:127-140. [PMID: 30597198 DOI: 10.1016/j.bbi.2018.12.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 12/21/2018] [Accepted: 12/22/2018] [Indexed: 01/16/2023] Open
Abstract
Posttraumatic stress disorder (PTSD) is a trauma and stressor-related disorder that is characterized by dysregulation of glucocorticoid signaling, chronic low-grade inflammation, and impairment in the ability to extinguish learned fear. Corticotropin-releasing hormone (Crh) is a stress- and immune-responsive neuropeptide secreted from the paraventricular nucleus of the hypothalamus (PVN) to stimulate the hypothalamic-pituitary-adrenal (HPA) axis; however, extra-hypothalamic sources of Crh from the central nucleus of the amygdala (CeA) and bed nucleus of the stria terminalis (BNST) govern specific fear- and anxiety-related defensive behavioral responses. We previously reported that preimmunization with a heat-killed preparation of the immunoregulatory environmental bacterium Mycobacterium vaccae NCTC 11659 enhances fear extinction in a fear-potentiated startle (FPS) paradigm. In this follow-up study, we utilized an in situ hybridization histochemistry technique to investigate Crh, Crhr1, and Crhr2 mRNA expression in the CeA, BNST, and PVN of the same rats from the original study [Fox et al., 2017, Brain, Behavior, and Immunity, 66: 70-84]. Here, we demonstrate that preimmunization with M. vaccae NCTC 11659 decreases Crh mRNA expression in the CeA and BNST of rats exposed to the FPS paradigm, and, further, that Crh mRNA expression in these regions is correlated with fear behavior during extinction training. These data are consistent with the hypothesis that M. vaccae promotes stress-resilience by attenuating Crh production in fear- and anxiety-related circuits. These data suggest that immunization with M. vaccae may be an effective strategy for prevention of fear- and anxiety-related disorders.
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Affiliation(s)
- Kelsey M Loupy
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Mathew R Arnold
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - James E Hassell
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Margaret W Lieb
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Lauren N Milton
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Kristin E Cler
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - James H Fox
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Philip H Siebler
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Dominic Schmidt
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Sylvana I S R Noronha
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Heidi E W Day
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA.
| | - Christopher A Lowry
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; Center for Neuroscience, University of Colorado Boulder, Boulder, CO 80309, USA; Department of Physical Medicine & Rehabilitation and Center for Neuroscience, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center, Denver Veterans Affairs Medical Center (VAMC), Denver, CO 80045, USA; Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Denver, CO 80045, USA.
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Gouveia FV, Gidyk DC, Giacobbe P, Ng E, Meng Y, Davidson B, Abrahao A, Lipsman N, Hamani C. Neuromodulation Strategies in Post-Traumatic Stress Disorder: From Preclinical Models to Clinical Applications. Brain Sci 2019; 9:brainsci9020045. [PMID: 30791469 PMCID: PMC6406551 DOI: 10.3390/brainsci9020045] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/02/2019] [Accepted: 02/15/2019] [Indexed: 12/18/2022] Open
Abstract
Post-traumatic stress disorder (PTSD) is an often debilitating disease with a lifetime prevalence rate between 5⁻8%. In war veterans, these numbers are even higher, reaching approximately 10% to 25%. Although most patients benefit from the use of medications and psychotherapy, approximately 20% to 30% do not have an adequate response to conventional treatments. Neuromodulation strategies have been investigated for various psychiatric disorders with promising results, and may represent an important treatment option for individuals with difficult-to-treat forms of PTSD. We review the relevant neurocircuitry and preclinical stimulation studies in models of fear and anxiety, as well as clinical data on the use of transcranial direct current stimulation (tDCS), repetitive transcranial magnetic stimulation (rTMS), and deep brain stimulation (DBS) for the treatment of PTSD.
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Affiliation(s)
| | - Darryl C Gidyk
- Sunnybrook Research Institute, Toronto, ON M4N3M5, Canada.
| | - Peter Giacobbe
- Sunnybrook Research Institute, Toronto, ON M4N3M5, Canada.
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
- Department of Psychiatry, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
| | - Enoch Ng
- Department of Psychiatry, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
| | - Ying Meng
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
| | - Benjamin Davidson
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
| | - Agessandro Abrahao
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
| | - Nir Lipsman
- Sunnybrook Research Institute, Toronto, ON M4N3M5, Canada.
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
| | - Clement Hamani
- Sunnybrook Research Institute, Toronto, ON M4N3M5, Canada.
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada.
- Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON M4N 3M5, Canada.
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11
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He F, Wang M, Geng X, Ai H. Effect of Electroacupuncture on the Activity of Corticotrophin-Releasing Hormone Neurons in the Hypothalamus and Amygdala in Rats Exposed to Restraint Water-Immersion Stress. Acupunct Med 2018; 36:394-400. [DOI: 10.1136/acupmed-2017-011450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2017] [Indexed: 12/16/2022]
Abstract
Objective To investigate the effects of electroacupuncture (EA) treatment on gastric mucosal lesions and the activity of corticotrophin-releasing hormone (CRH) neurons in the paraventricular nucleus (PVN) of the hypothalamus and the central nucleus of the amygdala (CNA) in a rat model of restraint water-immersion stress (RWIS). Methods 24 male Wistar rats were randomly divided into three groups: normal, RWIS, and RWIS+EA (n=8 per group). Rats in the RWIS group and RWIS+EA group received RWIS for 3 hours. For rats in the RWIS+EA group, EA was applied at ST36 in the bilateral hind legs for 30 min before RWIS. Rats in the normal group did not receive stressors or EA treatment. The gastric mucosal lesions of each rat were evaluated by the erosion index (EI) according to the methods of Guth. The activity of CRH neurons in the PVN and CNA was measured by a dual immunohistochemical test for Fos and CRH in the brain sections. Results RWIS induced serious gastric mucosal lesions. The mean gastric EI was significantly decreased in the RWIS+EA group versus the RWIS group (P=0.005). Stress induced significant activation of CRH neurons in the PVN and CNA compared with the normal group (P<0.001 for both). The mean number of Fos+CRH immunoreactive neurons in the PVN and CNA were both decreased inRWIS+EA versusRWIS groups (P<0.001 and P=0.001). Conclusions EA at ST36 can ameliorate RWIS-induced gastric mucosal lesions and suppress the Fos expression of CRH neurons in the PVN and CNA, suggesting a potentially therapeutic role for EA in stress-related gastric disorders.
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Affiliation(s)
- Feng He
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Min Wang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Xiwen Geng
- Advanced Materials Genome Innovation Team, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province, China
| | - Hongbin Ai
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
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12
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Kubo KY, Suzuki A, Iinuma M, Sato Y, Nagashio R, Ohta E, Azuma K. Vulnerability to stress in mouse offspring is ameliorated when pregnant dams are provided a chewing stick during prenatal stress. Arch Oral Biol 2018; 97:150-155. [PMID: 30390464 DOI: 10.1016/j.archoralbio.2018.10.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/14/2018] [Accepted: 10/15/2018] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To investigate whether maternal chewing during prenatal stress alters the responsivity of young offspring to novel stress, we examined the expression of hippocampal glucocorticoid receptors and mineralocorticoid receptors, and the levels of hypothalamic corticotropin-releasing hormone in young adult mouse offspring of dams exposed to restraint stress during pregnancy. DESIGN To induce stress, the dams were placed in a ventilated restraint tube for 45 min each day from day 12 of pregnancy through parturition. While restrained in the tube, one group of dams was provided a wooden stick for chewing. Hippocampal expression of glucocorticoid receptor and mineralocorticoid receptor messenger ribonucleic acid was assessed in 1-month-old pups. Hypothalamic expression of corticotropin-releasing hormone messenger ribonucleic acid was examined before and after exposing the offspring to a novel stressor. RESULTS Prenatal stress significantly decreased hippocampal expression of both glucocorticoid receptor and mineralocorticoid receptor messenger ribonucleic acid in the offspring, and increased the expression of corticotropin-releasing hormone messenger ribonucleic acid in the hypothalamic paraventricular nucleus in the offspring after novel stress exposure. Maternal chewing during exposure to prenatal stress attenuated the decreased hippocampal expression of both glucocorticoid receptor and mineralocorticoid receptor messenger ribonucleic acid, and the increased corticotropin-releasing hormone messenger ribonucleic acid expression in the hypothalamic paraventricular nucleus in the offspring. CONCLUSIONS Downregulation of hippocampal glucocorticoid receptor and mineralocorticoid receptor expression in offspring due to prenatal stress, which may be associated with increased susceptibility to novel stress in adulthood, are attenuated by allowing the dams to chew on a wooden stick.
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Affiliation(s)
- Kin-Ya Kubo
- Graduate School of Human Life Science, Nagoya Women's University, 3-40, Shioji-cho, Mizuho-ku, Nagoya, Aichi, 467-8610, Japan.
| | - Ayumi Suzuki
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Mitsuo Iinuma
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Yuichi Sato
- Department of Molecular Diagnostics, Kitasato University School of Allied Health Science, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan; R & D Center for Cell Design, Institute for Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Ryo Nagashio
- Department of Molecular Diagnostics, Kitasato University School of Allied Health Science, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan; R & D Center for Cell Design, Institute for Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Etsuro Ohta
- R & D Center for Cell Design, Institute for Regenerative Medicine and Cell Design, Kitasato University School of Allied Health Sciences, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan; Department of Immunology, Kitasato University School of Allied Health Sciences, Kitasato, 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kagaku Azuma
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
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13
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Altered Neuronal Activity in the Central Nucleus of the Amygdala Induced by Restraint Water-Immersion Stress in Rats. Neurosci Bull 2018; 34:1067-1076. [PMID: 30171524 PMCID: PMC6246852 DOI: 10.1007/s12264-018-0282-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 05/16/2018] [Indexed: 02/07/2023] Open
Abstract
Restraint water-immersion stress (RWIS), a compound stress model, has been widely used to induce acute gastric ulceration in rats. A wealth of evidence suggests that the central nucleus of the amygdala (CEA) is a focal region for mediating the biological response to stress. Different stressors induce distinct alterations of neuronal activity in the CEA; however, few studies have reported the characteristics of CEA neuronal activity induced by RWIS. Therefore, we explored this issue using immunohistochemistry and in vivo extracellular single-unit recording. Our results showed that RWIS and restraint stress (RS) differentially changed the c-Fos expression and firing properties of neurons in the medial CEA. In addition, RWIS, but not RS, induced the activation of corticotropin-releasing hormone neurons in the CEA. These findings suggested that specific neuronal activation in the CEA is involved in the formation of RWIS-induced gastric ulcers. This study also provides a possible theoretical explanation for the different gastric dysfunctions induced by different stressors.
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14
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Kubo KY, Kotachi M, Suzuki A, Iinuma M, Azuma K. Chewing during prenatal stress prevents prenatal stress-induced suppression of neurogenesis, anxiety-like behavior and learning deficits in mouse offspring. Int J Med Sci 2018; 15:849-858. [PMID: 30008596 PMCID: PMC6036092 DOI: 10.7150/ijms.25281] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/30/2018] [Indexed: 01/08/2023] Open
Abstract
Prenatal stress (PS) induces learning deficits and anxiety-like behavior in mouse pups by increasing corticosterone levels in the dam. We examined the effects of maternal chewing during PS on arginine vasopressin (AVP) mRNA expression in the dams and on neurogenesis, brain-derived neurotrophic factor (BDNF) mRNA expression, learning deficits and anxiety-like behavior in the offspring. Mice were divided into control, stress and stress/chewing groups. Pregnant mice were exposed to restraint stress beginning on day 12 of pregnancy and continuing until delivery. Mice in the stress/chewing group were given a wooden stick to chew during restraint stress. PS significantly increased AVP mRNA expression in the paraventricular nucleus (PVN) of the hypothalamus in the dams. PS also impaired learning ability, suppressed neurogenesis and BDNF mRNA expression in the hippocampus, and induced anxiety-like behavior in the offspring. Chewing during PS prevented the PS-induced increase in AVP mRNA expression of the PVN in the dams. Chewing during PS significantly attenuated the PS-induced learning deficits, anxiety-like behavior, and suppression of neurogenesis and BDNF mRNA expression in the hippocampus of the offspring. Chewing during PS prevented the increase in plasma corticosterone in the dam by inhibiting the hypothalamic-pituitary-adrenal axis activity, and attenuated the attenuated the PS-induced suppression of neurogenesis and BDNF expression in the hippocampus of the pups, thereby ameliorating the PS-induced learning deficits and anxiety-like behavior. Chewing during PS is an effective stress-coping method for the dam to prevent PS-induced deficits in learning ability and anxiety-like behavior in the offspring.
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Affiliation(s)
- Kin-ya Kubo
- Graduate School of Human Life Science, Nagoya Women's University, 3-40 Shioji-cho, Mizuho-ku, Nagoya, Aichi, 467-8610, Japan
| | - Mika Kotachi
- Departments of 2 Pediatric Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Ayumi Suzuki
- Departments of 2 Pediatric Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Mitsuo Iinuma
- Departments of 2 Pediatric Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Kagaku Azuma
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyusyu, 807-8555, Japan
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15
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Abstract
This randomized cross-over study tested the hypothesis that exposure to short-wavelength light induces symptoms of motion sickness (MS). The study participants were 28 healthy adults (14 women; mean age±SD, 25.96±3.11 years). Two stimuli oscillating within a range of 0.4-0.6 Hz were used to induce MS: a blue wave stimulus with short-wavelength light (460 nm) and a green wave stimulus with middle-wavelength light (555 nm). All participants were exposed to both stimuli throughout two separate periods. After a baseline period, participants were exposed to each stimulus three times for 4 min. The Simulator Sickness Questionnaire, a self-report checklist composed of three subscales (Oculomotor, Disorientation, and Nausea), heart rate variability, and electrogastrography were used to measure the degree of symptoms related to MS. A linear mixed-effects model was used for statistical analysis. The results showed significant main effects for Period (P<0.01), Color (P<0.01), and Time Point (P<0.01) scores on the Simulator Sickness Questionnaire Nausea subscale. A post-hoc test indicated that scores on the Nausea subscale were significantly higher after the third exposure to blue light than after the first and second exposures. The linear mixed-effects model showed significant main effects for Color (P<0.01) with respect to the normogastria/tachygastria ratio. These findings suggest that short-wavelength light induces symptoms of MS, especially gastrointestinal symptoms.
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16
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Surkin PN, Gallino SL, Luce V, Correa F, Fernandez-Solari J, De Laurentiis A. Pharmacological augmentation of endocannabinoid signaling reduces the neuroendocrine response to stress. Psychoneuroendocrinology 2018; 87:131-140. [PMID: 29065362 DOI: 10.1016/j.psyneuen.2017.10.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 10/09/2017] [Accepted: 10/12/2017] [Indexed: 12/22/2022]
Abstract
Activation of the hypothalamic-pituitary-adrenal axis (HPA) is critical for survival when the organism is exposed to a stressful stimulus. The endocannabinoid system (ECS) is currently considered an important neuromodulator involved in numerous pathophysiological processes and whose primary function is to maintain homeostasis. In the tissues constituting the HPA axis, all the components of the ECS are present and the activation of this system acts in parallel with changes in the activity of numerous neurotransmitters, including nitric oxide (NO). NO is widely distributed in the brain and adrenal glands and recent studies have shown that free radicals, and in particular NO, may play a crucial role in the regulation of stress response. Our objective was to determine the participation of the endocannabinoid and NOergic systems as probable mediators of the neuroendocrine HPA axis response to a psychophysical acute stress model in the adult male rat. Animals were pre-treated with cannabinoid receptors agonists and antagonists at central and systemic level prior to acute restraint exposure. We also performed in vitro studies incubating adrenal glands in the presence of ACTH and pharmacological compounds that modifies ECS components. Our results showed that the increase in corticosterone observed after acute restraint stress is blocked by anandamide administered at both central and peripheral level. At hypothalamic level both cannabinoid receptors (CB1 and CB2) are involved, while in the adrenal gland, anandamide has a very potent effect in suppressing ACTH-induced corticosterone release that is mainly mediated by vanilloid TRPV1 receptors. We also observed that stress significantly increased hypothalamic mRNA levels of CB1 as well as adrenal mRNA levels of TRPV1 receptor. In addition, anandamide reduced the activity of the nitric oxide synthase enzyme during stress, indicating that the anti-stress action of endocannabinoids may involve a reduction in NO production at hypothalamic and adrenal levels. In conclusion, an endogenous cannabinoid tone maintains the HPA axis in a stable basal state, which is lost with a noxious stimulus. In this case, the ECS dampens the response to stress allowing the recovery of homeostasis. Moreover, our work further contributes to in vitro evidence for a participation of the endocannabinoid system by inhibiting corticosterone release directly at the adrenal gland level.
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Affiliation(s)
- Pablo Nicolás Surkin
- Cátedra de Fisiología, Facultad de Odontología, Universidad de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Sofia Ludmila Gallino
- Centro de Estudios Farmacológicos y Botánicos, CEFyBO-CONICET-UBA, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Valeria Luce
- Centro de Estudios Farmacológicos y Botánicos, CEFyBO-CONICET-UBA, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernando Correa
- Centro de Estudios Farmacológicos y Botánicos, CEFyBO-CONICET-UBA, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Javier Fernandez-Solari
- Cátedra de Fisiología, Facultad de Odontología, Universidad de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Andrea De Laurentiis
- Centro de Estudios Farmacológicos y Botánicos, CEFyBO-CONICET-UBA, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina; Cátedra de Fisiología, Facultad de Odontología, Universidad de Buenos Aires, Argentina.
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17
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Reznikov R, Hamani C. Posttraumatic Stress Disorder: Perspectives for the Use of Deep Brain Stimulation. Neuromodulation 2016; 20:7-14. [PMID: 27992092 DOI: 10.1111/ner.12551] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/02/2016] [Accepted: 10/18/2016] [Indexed: 12/30/2022]
Abstract
OBJECTIVES Deep Brain Stimulation (DBS) has been either approved or is currently under investigation for a number of psychiatric disorders. MATERIALS AND METHODS We review clinical and preclinical concepts as well as the neurocircuitry that may be of relevance for the implementation of DBS in posttraumatic stress disorder (PTSD). RESULTS PTSD is a chronic and debilitating illness associated with dysfunction in well-established neural circuits, including the amygdala and prefrontal cortex. Although most patients often improve with medications and/or psychotherapy, approximately 20-30% are considered to be refractory to conventional treatments. In other psychiatric disorders, DBS has been investigated in treatment-refractory patients. To date, preclinical work suggests that stimulation at high frequency delivered at particular timeframes to different targets, including the amygdala, ventral striatum, hippocampus, and prefrontal cortex may improve fear extinction and anxiety-like behavior in rodents. In the only clinical report published so far, a patient implanted with electrodes in the amygdala has shown striking improvements in PTSD symptoms. CONCLUSIONS Neuroimaging, preclinical, and preliminary clinical data suggest that the use of DBS for the treatment of PTSD may be practical but the field requires further investigation.
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Affiliation(s)
- Roman Reznikov
- Behavioural Neurobiology Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Clement Hamani
- Behavioural Neurobiology Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Division of Neurosurgery, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
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18
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Kalin NH, Fox AS, Kovner R, Riedel MK, Fekete EM, Roseboom PH, Tromp DPM, Grabow BP, Olsen ME, Brodsky EK, McFarlin DR, Alexander AL, Emborg ME, Block WF, Fudge JL, Oler JA. Overexpressing Corticotropin-Releasing Factor in the Primate Amygdala Increases Anxious Temperament and Alters Its Neural Circuit. Biol Psychiatry 2016; 80:345-55. [PMID: 27016385 PMCID: PMC4967405 DOI: 10.1016/j.biopsych.2016.01.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 12/23/2015] [Accepted: 01/14/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND Nonhuman primate models are critical for understanding mechanisms underlying human psychopathology. We established a nonhuman primate model of anxious temperament (AT) for studying the early-life risk to develop anxiety and depression. Studies have identified the central nucleus of the amygdala (Ce) as an essential component of AT's neural substrates. Corticotropin-releasing factor (CRF) is expressed in the Ce, has a role in stress, and is linked to psychopathology. Here, in young rhesus monkeys, we combined viral vector technology with assessments of anxiety and multimodal neuroimaging to understand the consequences of chronically increased CRF in the Ce region. METHODS Using real-time intraoperative magnetic resonance imaging-guided convection-enhanced delivery, five monkeys received bilateral dorsal amygdala Ce-region infusions of adeno-associated virus serotype 2 containing the CRF construct. Their cagemates served as unoperated control subjects. AT, regional brain metabolism, resting functional magnetic resonance imaging, and diffusion tensor imaging were assessed before and 2 months after viral infusions. RESULTS Dorsal amygdala CRF overexpression significantly increased AT and metabolism within the dorsal amygdala. Additionally, we observed changes in metabolism in other AT-related regions, as well as in measures of functional and structural connectivity. CONCLUSIONS This study provides a translational roadmap that is important for understanding human psychopathology by combining molecular manipulations used in rodents with behavioral phenotyping and multimodal neuroimaging measures used in humans. The results indicate that chronic CRF overexpression in primates not only increases AT but also affects metabolism and connectivity within components of AT's neural circuitry.
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Affiliation(s)
- Ned H Kalin
- Department of Psychiatry, University of Wisconsin, Madison, WI,Neuroscience Training Program, University of Wisconsin, Madison, WI,Wisconsin National Primate Research Center, Madison, WI
| | - Andrew S Fox
- Department of Psychiatry, University of Wisconsin, Madison, WI
| | - Rothem Kovner
- Department of Psychiatry, University of Wisconsin, Madison, WI,Neuroscience Training Program, University of Wisconsin, Madison, WI
| | | | - Eva M Fekete
- Department of Psychiatry, University of Wisconsin, Madison, WI
| | - Patrick H Roseboom
- Department of Psychiatry, University of Wisconsin, Madison, WI,Neuroscience Training Program, University of Wisconsin, Madison, WI
| | - Do P M Tromp
- Department of Psychiatry, University of Wisconsin, Madison, WI,Neuroscience Training Program, University of Wisconsin, Madison, WI
| | | | - Miles E Olsen
- Department of Medical Physics, University of Wisconsin, Madison, WI
| | - Ethan K Brodsky
- Department of Medical Physics, University of Wisconsin, Madison, WI,inseRT MRI, Inc
| | | | - Andrew L Alexander
- Department of Psychiatry, University of Wisconsin, Madison, WI,Department of Medical Physics, University of Wisconsin, Madison, WI,inseRT MRI, Inc
| | - Marina E Emborg
- Neuroscience Training Program, University of Wisconsin, Madison, WI,Department of Medical Physics, University of Wisconsin, Madison, WI,Wisconsin National Primate Research Center, Madison, WI
| | - Walter F Block
- Department of Medical Physics, University of Wisconsin, Madison, WI,inseRT MRI, Inc
| | - Julie L Fudge
- Departments of Neurobiology and Anatomy, and Psychiatry, University of Rochester Medical Center
| | - Jonathan A Oler
- Department of Psychiatry, University of Wisconsin, Madison, Wisconsin.
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19
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Gai Z, Li K, Sun H, She X, Cui B, Wang R. Effects of chronic noise on mRNA and protein expression of CRF family molecules and its relationship with p-tau in the rat prefrontal cortex. J Neurol Sci 2016; 368:307-13. [PMID: 27538655 DOI: 10.1016/j.jns.2016.07.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 07/15/2016] [Accepted: 07/21/2016] [Indexed: 11/30/2022]
Abstract
Chronic noise exposure has been associated with Alzheimer's disease (AD)-like pathological changes, such as tau hyperphosphorylation and β-amyloid peptide accumulation in the prefrontal cortex (PFC). Corticotropin-releasing factor (CRF) is the central driving force in the stress response and a regulator of tau phosphorylation via binding to CRF receptors (CRFR). Little is known about the CRF system in relation to noise-induced AD-like changes in the PFC. The aim of this study was to explore the effects of chronic noise exposure on the CRF system in the PFC of rats and its relationship to tau phosphorylation. Male Wistar rats were randomly divided into control and noise exposure groups. The CRF system was evaluated following chronic noise exposure (95dB sound pressure level white noise, 4h/day×30days). Chronic noise significantly accelerated the progressive overproduction of corticosterone and upregulated CRF and CRFR1 mRNA and protein, both of which persisted 7-14days after noise exposure. In contrast, CRFR2 was elevated 3-7days following the last stimulus. Double-labeling immunofluorescence co-localized p-tau with CRF in PFC neurons. The results suggest that chronic noise exposure elevates the expression of the CRF system, which may contribute to AD-like changes.
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Affiliation(s)
- Zhihui Gai
- Shandong Academy of Medical Sciences, Shandong Institute of Prevention and Control of Occupational Health and Occupational Disease, Jinan 250062, China; Department of Occupational Hygiene, Institute of Health and Environmental Medicine, Tianjin 300050, China
| | - Kang Li
- Department of Occupational Hygiene, Institute of Health and Environmental Medicine, Tianjin 300050, China
| | - Huanrui Sun
- Department of Occupational Hygiene, Institute of Health and Environmental Medicine, Tianjin 300050, China
| | - Xiaojun She
- Department of Occupational Hygiene, Institute of Health and Environmental Medicine, Tianjin 300050, China
| | - Bo Cui
- Department of Occupational Hygiene, Institute of Health and Environmental Medicine, Tianjin 300050, China.
| | - Rui Wang
- Shandong Academy of Medical Sciences, Shandong Institute of Prevention and Control of Occupational Health and Occupational Disease, Jinan 250062, China.
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20
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Hu MH, Bashir Z, Li XF, O'Byrne KT. Posterodorsal Medial Amygdala Mediates Tail-Pinch Induced Food Intake in Female Rats. J Neuroendocrinol 2016; 28. [PMID: 27028781 PMCID: PMC4949627 DOI: 10.1111/jne.12390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 03/25/2016] [Accepted: 03/29/2016] [Indexed: 01/05/2023]
Abstract
Comfort eating during periods of stress is a common phenomenon observed in both animals and humans. However, the underlying mechanisms of stress-induced food intake remain elusive. The amygdala plays a central role in higher-order emotional processing and the posterodorsal subnucleus of the medial amygdala (MePD), in particular, is involved in food intake. Extra-hypothalamic corticotrophin-releasing factor (CRF) is well recognised for mediating behavioural responses to stress. To explore the possible role of amygdala CRF receptor activation in stress-induced food intake, we evaluated whether a stressor such as tail-pinch, which reliably induces food intake, would fail to do so in animals bearing bilateral neurotoxic lesions of the MePD. Our results showed that ibotenic acid induced lesions of the MePD markedly reduced tail-pinch induced food intake in ovariectomised, 17β-oestradiol replaced rats. In addition, intra-MePD (right side only) administration of CRF (0.002 or 0.02 ng) via chronically implanted cannulae resulted in a dose-dependent increase in food intake, although higher doses of 0.2 and 2 ng CRF had less effect, producing a bell shaped curve. Furthermore, intra-MePD (bilateral) administration of the CRF receptor antagonist, astressin (0.3 μg per side) effectively blocked tail-pinch induced food intake. These data suggest that the MePD is involved in stress-induced food intake and that the amygdala CRF system may be a mediator of comfort eating.
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Affiliation(s)
- M H Hu
- Division of Women's Health, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Z Bashir
- Division of Women's Health, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - X F Li
- Division of Women's Health, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - K T O'Byrne
- Division of Women's Health, Faculty of Life Sciences and Medicine, King's College London, London, UK
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21
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Motta SC, Canteras NS. Restraint stress and social defeat: What they have in common. Physiol Behav 2016; 146:105-110. [PMID: 26066716 DOI: 10.1016/j.physbeh.2015.03.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/11/2015] [Accepted: 03/12/2015] [Indexed: 11/28/2022]
Abstract
Bob Blanchard was a great inspiration for our studies on the neural basis of social defense. In the present study, we compared the hypothalamic pattern of activation between social defeat and restraint stress. As important stress situations, both defeated and immobilized animals displayed a substantial increase in Fos in the parvicellular part of the paraventricular nucleus,mostly in the region that contains the CRH neurons. In addition, socially defeated animals, but not restrained animals, recruited elements of the medial hypothalamic conspecific-responsive circuit, a region also engaged in other forms of social behavior. Of particular interest, both defeated and immobilized animals presented a robust increase in Fos expression in specific regions of the lateral hypothalamic area (i.e., juxtaparaventricular and juxtadorsomedial regions) likely to convey septo-hippocampal information encoding the environmental boundary restriction observed in both forms of stress, and in the dorsomedial part of the dorsal premammillary nucleus which seems to work as a key player for the expression of, at least, part of the behavioral responses during both restraint and social defeat. These results indicate interesting commonalities between social defeat and restraint stress, suggesting, for the first time, a septo-hippocampal–hypothalamic path likely to respond to the environmental boundary restriction that may act as common stressor component for both types of stress. Moreover, the comparison of the neural circuits mediating physical restraint and social defense revealed a possible path for encoding the entrapment component during social confrontation.
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Miyake H, Mori D, Katayama T, Fujiwara S, Sato Y, Azuma K, Kubo KY. Novel stress increases hypothalamic-pituitary-adrenal activity in mice with a raised bite. Arch Oral Biol 2016; 68:55-60. [PMID: 27082875 DOI: 10.1016/j.archoralbio.2016.03.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 03/27/2016] [Accepted: 03/30/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE In humans, occlusal disharmony may cause various physical complaints, including head and neck ache, stiffness in the shoulder and neck, and arthrosis of the temporomandibular joints. Occlusal disharmony induced by raising the bite in rodents, increases plasma corticosterone levels, which leads to morphologic changes in the hippocampus and altered hippocampus-related behavior. The paraventricular nucleus (PVN) of the hypothalamus regulates the hypothalamic-pituitary-adrenal system. Chronically stressed animals exposed to a novel stress exhibit higher adrenocorticotropic hormone levels than naive control animals. We hypothesized that there would be different response of the corticotrophin releasing hormone (CRH) and arginine vasopressin (AVP) to a novel acute stress with occlusal disharmony. DESIGN In order to investigate how exposure of mice with occlusal disharmony to a novel acute stress (restraint stress) affects the PVN, we induced occlusal disharmony by raising the vertical dimension of the bite (bite-raised condition) and examined the expression of corticotrophin releasing hormone (CRH) mRNA and arginine vasopressin (AVP) mRNA in mouse PVN. RESULTS CRH mRNA expression was increased in the PVN of the bite-raised group 90min after the bite-raising procedure, but the expression was recovered to the control level at 14days. AVP mRNA expression in the PVN was normal at 90min, and increased significantly 14days after the bite-raising procedure. Exposure to restraint stress in the bite-raised mice induced a significant increase in CRH mRNA expression in the PVN. CONCLUSIONS The bite-raising procedure induced a rapid CRH mRNA response and a slower AVP mRNA response in the parvocellular PVN of the hypothalamus. Exposure to a novel stress following the bite-raising procedure further reinforced the CRH stress response. Thus, occlusal disharmony, such as that induced by raising the bite, may be a risk factor for hypersensitivity to a novel stress.
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Affiliation(s)
- Hidekazu Miyake
- Department of Prosthodontics, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Daisuke Mori
- Department of Prosthodontics, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Tasuku Katayama
- Department of Prosthodontics, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Shuu Fujiwara
- Department of Prosthodontics, Asahi University School of Dentistry, 1851 Hozumi, Mizuho, Gifu, 501-0296, Japan
| | - Yuichi Sato
- Department of Molecular Diagnostics, Kitasato University School of Allied Health Science, Kitasato 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kagaku Azuma
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka, 807-8555, Japan
| | - Kin-Ya Kubo
- Seijoh University Graduate School of Health Care Studies, 2-172, Fukinodai, Tokai, Aichi, 476-8588, Japan.
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LIU SUMEI, CHANG JEN, LONG NICOLE, BECKWITH KAYLEE, TALHOUARNE GAËLLE, BROOKS JULIAJ, QU MEIHUA, REN WEI, WOOD JACKIED, COOPER SCOTT, BHARGAVA ADITI. Endogenous CRF in rat large intestine mediates motor and secretory responses to stress. Neurogastroenterol Motil 2016; 28:281-91. [PMID: 26611915 PMCID: PMC4727995 DOI: 10.1111/nmo.12725] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 10/12/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Corticotropin-releasing factor (CRF) mediates our body's overall responses to stress. The role of central CRF in stress-stimulated colonic motility is well characterized. We hypothesized that transient perturbation in expression of enteric CRF is sufficient to change stress-induced colonic motor and secretory responses. METHODS Sprague-Dawley rats (adult, male) were subjected to 1-h partial restraint stress (PRS) and euthanized at 0, 4, 8, and 24 h. CRF mRNA and peptide levels in the colon were quantified by real-time RT-PCR, enzyme immuno-assay and immunohistochemistry. Double-stranded RNA (dsRNA) designed to target CRF (dsCRF) was injected into the colonic wall to attain RNA interference-mediated inhibition of CRF mRNA expression. DsRNA for β-globin was used as a control (dsControl). Four days after dsRNA injection, rats were subjected to 1-h PRS. Fecal output was measured. Ussing chamber techniques were used to assess colonic mucosal ion secretion and transepithelial tissue conductance. KEY RESULTS Exposure to PRS elevated CRF expression and increased CRF release in the rat colon. Injection of dsCRF inhibited basal CRF expression and prevented the PRS-induced increase in CRF expression, whereas CRF expression in dsControl-injected colons remained high after PRS. In rats treated with dsControl, PRS caused a significant increase in fecal pellet output, colonic baseline ion secretion, and transepithelial tissue conductance. Inhibition of CRF expression in the colon prevented PRS-induced increase in fecal output, baseline ion secretion, and transepithelial tissue conductance. CONCLUSIONS & INFERENCES These results provide direct evidence that transient perturbation in peripherally expressed CRF prevents colonic responses to stress.
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Affiliation(s)
- SUMEI LIU
- Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA,Corresponding author: Sumei Liu, Ph.D., Address: Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, 3010 Cowley Hall, 1725 State Street, La Crosse, WI 54601, USA, Tel: 1-608-785-6971, Fax: 1-608-785-6959,
| | - JEN CHANG
- Department of Ob-Gyn and Surgery, The Osher Center for Integrative Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - NICOLE LONG
- Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA
| | - KAYLEE BECKWITH
- Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA
| | - GAËLLE TALHOUARNE
- Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA
| | - JULIA J. BROOKS
- Department of Ob-Gyn and Surgery, The Osher Center for Integrative Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - MEI-HUA QU
- Departments of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - WEI REN
- Departments of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - JACKIE D. WOOD
- Departments of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - SCOTT COOPER
- Department of Biology, College of Science and Health, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA
| | - ADITI BHARGAVA
- Department of Ob-Gyn and Surgery, The Osher Center for Integrative Medicine, University of California San Francisco, San Francisco, CA 94143, USA
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Wang H, Li S, Kirouac GJ. Effects of footshocks on anxiety-like behavior and mRNA levels of precursor peptides for corticotropin releasing factor and opioids in the forebrain of the rat. Neuropeptides 2015; 54:1-7. [PMID: 26363852 DOI: 10.1016/j.npep.2015.08.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 11/23/2022]
Abstract
Corticotropin releasing factor (CRF) and dynorphin are neuropeptides that are associated with the negative emotional states. Experimental evidence indicates that dynorphin neurons located in the nucleus accumbens and CRF neurons in the bed nucleus of the stria terminalis (BST) and the central nucleus of the amygdala (CeA) mediate anxiety-like behaviors immediately after the stressful experience (24-48h). The present study was done to evaluate if changes in the levels of the mRNA for these peptides in the striatum, BST, and CeA were associated with the long-lasting avoidance of novelty, a measure of an anxiety-like state, in a subset of rats exposed to unpredictable and moderately intense footshocks (5×2s of 1.5mA). Shocked rats with enhanced fear to a novel tone 24h after the footshocks (high responders; HR) displayed long-lasting avoidance in the elevated T-maze whereas shocked rats with low levels of acute fear (low responders; LR) had low levels of avoidance similar to nonshocked rats. An increase in the level of proCRF mRNA was detected in the CeA of the HR compared to LR and nonshocked rats but not in other areas of the brain sampled. In contrast, prodynorphin and proenkephalin mRNA levels in the striatum, BST and CeA were not different between HR, LR and nonshocked rats. This study provides evidence that CRF neurons in the CeA may play a role in the anxiety-like state produced in a subset of rats exposed to footshocks.
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Affiliation(s)
- Huiying Wang
- Department of Oral Biology, College of Dentistry, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Sa Li
- Department of Oral Biology, College of Dentistry, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Gilbert J Kirouac
- Department of Oral Biology, College of Dentistry, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Psychiatry, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
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Dextran sulfate sodium-induced colitis alters stress-associated behaviour and neuropeptide gene expression in the amygdala-hippocampus network of mice. Sci Rep 2015; 5:9970. [PMID: 26066467 PMCID: PMC4464346 DOI: 10.1038/srep09970] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 03/26/2015] [Indexed: 01/07/2023] Open
Abstract
Psychological stress causes disease exacerbation and relapses in inflammatory bowel disease (IBD) patients. Since studies on stress processing during visceral inflammation are lacking, we investigated the effects of experimental colitis as well as psychological stress on neurochemical and neuroendocrine changes as well as behaviour in mice. Dextran sulfate sodium (DSS)-induced colitis and water avoidance stress (WAS) were used as mouse models of colitis and mild psychological stress, respectively. We measured WAS-associated behaviour, gene expression and proinflammatory cytokine levels within the amygdala, hippocampus and hypothalamus as well as plasma levels of cytokines and corticosterone in male C57BL/6N mice. Animals with DSS-induced colitis presented with prolonged immobility during the WAS session, which was associated with brain region-dependent alterations of neuropeptide Y (NPY), NPY receptor Y1, corticotropin-releasing hormone (CRH), CRH receptor 1, brain-derived neurotrophic factor and glucocorticoid receptor gene expression. Furthermore, the combination of DSS and WAS increased interleukin-6 and growth regulated oncogene-α levels in the brain. Altered gut-brain signalling in the course of DSS-induced colitis is thought to cause the observed distinct gene expression changes in the limbic system and the aberrant molecular and behavioural stress responses. These findings provide new insights into the effects of stress during IBD.
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Janitzky K, Peine A, Kröber A, Yanagawa Y, Schwegler H, Roskoden T. Increased CRF mRNA expression in the sexually dimorphic BNST of male but not female GAD67 mice and TMT predator odor stress effects upon spatial memory retrieval. Behav Brain Res 2014; 272:141-9. [DOI: 10.1016/j.bbr.2014.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 06/05/2014] [Accepted: 06/09/2014] [Indexed: 01/05/2023]
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Nahata M, Saegusa Y, Sadakane C, Yamada C, Nakagawa K, Okubo N, Ohnishi S, Hattori T, Sakamoto N, Takeda H. Administration of exogenous acylated ghrelin or rikkunshito, an endogenous ghrelin enhancer, improves the decrease in postprandial gastric motility in an acute restraint stress mouse model. Neurogastroenterol Motil 2014; 26:821-31. [PMID: 24684160 PMCID: PMC4415484 DOI: 10.1111/nmo.12336] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 03/06/2014] [Indexed: 02/08/2023]
Abstract
BACKGROUND Physical or psychological stress causes functional disorders in the upper gastrointestinal tract. This study aims to elucidate the ameliorating effect of exogenous acylated ghrelin or rikkunshito, a Kampo medicine which acts as a ghrelin enhancer, on gastric dysfunction during acute restraint stress in mice. METHODS Fasted and postprandial motor function of the gastric antrum was wirelessly measured using a strain gauge force transducer and solid gastric emptying was detected in mice exposed to restraint stress. Plasma corticosterone and ghrelin levels were also measured. To clarify the role of ghrelin on gastrointestinal dysfunction in mice exposed to stress, exogenous acylated ghrelin or rikkunshito was administered, then the mice were subjected to restraint stress. KEY RESULTS Mice exposed to restraint stress for 60 min exhibited delayed gastric emptying and increased plasma corticosterone levels. Gastric motility was decreased in mice exposed to restraint stress in both fasting and postprandial states. Restraint stress did not cause any change in plasma acylated ghrelin levels, but it significantly increased the plasma des-acyl ghrelin levels. Administration of acylated ghrelin or rikkunshito improved the restraint stress-induced delayed gastric emptying and decreased antral motility. Ameliorating effects of rikkunshito on stress-induced gastric dysfunction were abolished by simultaneous administration of a ghrelin receptor antagonist. CONCLUSIONS & INFERENCES Plasma acylated/des-acyl ghrelin imbalance was observed in acute restraint stress. Supplementation of exogenous acylated ghrelin or enhancement of endogenous ghrelin signaling may be useful in the treatment of decreased gastric function caused by stress.
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Affiliation(s)
- M Nahata
- Tsumura Research Laboratories, Tsumura & Co.Ibaraki, Japan
| | - Y Saegusa
- Tsumura Research Laboratories, Tsumura & Co.Ibaraki, Japan
| | - C Sadakane
- Tsumura Research Laboratories, Tsumura & Co.Ibaraki, Japan
| | - C Yamada
- Tsumura Research Laboratories, Tsumura & Co.Ibaraki, Japan
| | - K Nakagawa
- Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporo, Hokkaido, Japan
| | - N Okubo
- Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporo, Hokkaido, Japan
| | - S Ohnishi
- Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of MedicineSapporo, Hokkaido, Japan
| | - T Hattori
- Tsumura Research Laboratories, Tsumura & Co.Ibaraki, Japan
| | - N Sakamoto
- Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of MedicineSapporo, Hokkaido, Japan
| | - H Takeda
- Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido UniversitySapporo, Hokkaido, Japan,Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of MedicineSapporo, Hokkaido, Japan,Address for Correspondence Hiroshi Takeda, Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido University, N12W6, Kita-ku, Sapporo, Hokkaido 060-0812, Japan., Tel: +81-11-706-3746; fax: +81-11-706-4978; e-mail:
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de la Tremblaye PB, Raymond J, Milot MR, Merali Z, Plamondon H. Evidence of lasting dysregulation of neuroendocrine and HPA axis function following global cerebral ischemia in male rats and the effect of Antalarmin on plasma corticosterone level. Horm Behav 2014; 65:273-84. [PMID: 24444675 DOI: 10.1016/j.yhbeh.2014.01.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/09/2014] [Accepted: 01/10/2014] [Indexed: 01/06/2023]
Abstract
Abnormal function of the neuroendocrine stress system has been implicated in the behavioral impairments observed following brain ischemia. The current study examined long-term changes in stress signal regulation 30days following global cerebral ischemia. Experiment 1 investigated changes in the expression of corticotropin releasing hormone (CRH) and its subtype 1 receptor (CRHR1), glucocorticoid receptors (GR) in the paraventricular nucleus of the hypothalamus (PVN), the central nucleus of the amygdala (CeA), and the CA1 subfield of the hippocampus. Tyrosine hydroxylase (TH) was determined at the locus coeruleus (LC). Experiment 2 investigated the role of central CRHR1 activation on corticosterone (CORT) secretion at multiple time intervals following global ischemia after exposure to an acute stressor. Findings from Experiment 1 demonstrated a persistent increase in GR, CRH and CRHR1 immunoreactivity (ir) at the PVN, reduced GR and CRHR1 expression in pyramidal CA1 neurons, and increased LC TH expression in ischemic rats displaying working memory errors in the radial arm Maze. Findings from Experiment 2 revealed increased CORT secretion up to 7 days, but no longer present 14 and 21 days post ischemia. However upon an acute restraint stress induced 27 days following reperfusion, ischemic rats had increased plasma CORT secretions compared to sham-operated animals, suggesting HPA axis hypersensitivity. Antalarmin (2 μg/2 μl) pretreatment significantly attenuated post ischemic elevation of basal and stress-induced CORT secretion. These findings support persistent neuroendocrine dysfunctions following brain ischemia likely to contribute to emotional and cognitive impairments observed in survivors of cardiac arrest and stroke.
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MESH Headings
- Animals
- Behavior, Animal/drug effects
- Behavior, Animal/physiology
- Brain Ischemia/metabolism
- Brain Ischemia/physiopathology
- CA1 Region, Hippocampal/metabolism
- Central Amygdaloid Nucleus/metabolism
- Corticosterone/blood
- Corticotropin-Releasing Hormone/metabolism
- Hypothalamo-Hypophyseal System/drug effects
- Hypothalamo-Hypophyseal System/metabolism
- Hypothalamo-Hypophyseal System/physiopathology
- Limbic System/drug effects
- Limbic System/metabolism
- Locus Coeruleus/metabolism
- Male
- Memory, Short-Term/physiology
- Neurosecretory Systems/drug effects
- Neurosecretory Systems/metabolism
- Neurosecretory Systems/physiopathology
- Paraventricular Hypothalamic Nucleus/metabolism
- Pituitary-Adrenal System/drug effects
- Pituitary-Adrenal System/metabolism
- Pituitary-Adrenal System/physiopathology
- Pyrimidines/administration & dosage
- Pyrimidines/pharmacology
- Pyrroles/administration & dosage
- Pyrroles/pharmacology
- Rats
- Rats, Wistar
- Receptors, Corticotropin-Releasing Hormone/antagonists & inhibitors
- Receptors, Corticotropin-Releasing Hormone/metabolism
- Receptors, Glucocorticoid/metabolism
- Stress, Psychological/metabolism
- Stress, Psychological/physiopathology
- Time Factors
- Tyrosine 3-Monooxygenase/metabolism
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Affiliation(s)
- Patricia B de la Tremblaye
- Behavioural Neuroscience Group, School of Psychology, University of Ottawa, 136 Jean-Jacques Lussier, Ottawa, ON, K1N 6N5, Canada
| | - Julie Raymond
- Behavioural Neuroscience Group, School of Psychology, University of Ottawa, 136 Jean-Jacques Lussier, Ottawa, ON, K1N 6N5, Canada
| | - Marc R Milot
- Behavioural Neuroscience Group, School of Psychology, University of Ottawa, 136 Jean-Jacques Lussier, Ottawa, ON, K1N 6N5, Canada
| | - Zul Merali
- Behavioural Neuroscience Group, School of Psychology, University of Ottawa, 136 Jean-Jacques Lussier, Ottawa, ON, K1N 6N5, Canada; University of Ottawa Institute of Mental Health Research (IMHR), 1145 Carling Avenue Ottawa, Ontario K1Z 7K4, Canada
| | - Hélène Plamondon
- Behavioural Neuroscience Group, School of Psychology, University of Ottawa, 136 Jean-Jacques Lussier, Ottawa, ON, K1N 6N5, Canada.
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Brunton PJ, Russell JA, Hirst JJ. Allopregnanolone in the brain: protecting pregnancy and birth outcomes. Prog Neurobiol 2014; 113:106-36. [PMID: 24012715 DOI: 10.1016/j.pneurobio.2013.08.005] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 08/12/2013] [Accepted: 08/25/2013] [Indexed: 01/09/2023]
Abstract
A successful pregnancy requires multiple adaptations in the mother's brain that serve to optimise foetal growth and development, protect the foetus from adverse prenatal programming and prevent premature delivery of the young. Pregnancy hormones induce, organise and maintain many of these adaptations. Steroid hormones play a critical role and of particular importance is the progesterone metabolite and neurosteroid, allopregnanolone. Allopregnanolone is produced in increasing amounts during pregnancy both in the periphery and in the maternal and foetal brain. This review critically examines a role for allopregnanolone in both the maternal and foetal brain during pregnancy and development in protecting pregnancy and birth outcomes, with particular emphasis on its role in relation to stress exposure at this time. Late pregnancy is associated with suppressed stress responses. Thus, we begin by considering what is known about the central mechanisms in the maternal brain, induced by allopregnanolone, that protect the foetus(es) from exposure to harmful levels of maternal glucocorticoids as a result of stress during pregnancy. Next we discuss the central mechanisms that prevent premature secretion of oxytocin and consider a role for allopregnanolone in minimising the risk of preterm birth. Allopregnanolone also plays a key role in the foetal brain, where it promotes development and is neuroprotective. Hence we review the evidence about disruption to neurosteroid production in pregnancy, through prenatal stress or other insults, and the immediate and long-term adverse consequences for the offspring. Finally we address whether progesterone or allopregnanolone treatment can rescue some of these deficits in the offspring.
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Affiliation(s)
- Paula J Brunton
- Division of Neurobiology, The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Scotland, UK.
| | - John A Russell
- Centre for Integrative Physiology, School of Biomedical Sciences, University of Edinburgh, Scotland, UK
| | - Jonathan J Hirst
- Mothers and Babies Research Centre, School of Biomedical Sciences, University of Newcastle, Newcastle, N.S.W., Australia
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Kormos V, Gaszner B. Role of neuropeptides in anxiety, stress, and depression: from animals to humans. Neuropeptides 2013; 47:401-19. [PMID: 24210138 DOI: 10.1016/j.npep.2013.10.014] [Citation(s) in RCA: 234] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/07/2013] [Accepted: 10/09/2013] [Indexed: 12/11/2022]
Abstract
Major depression, with its strikingly high prevalence, is the most common cause of disability in communities of Western type, according to data of the World Health Organization. Stress-related mood disorders, besides their deleterious effects on the patient itself, also challenge the healthcare systems with their great social and economic impact. Our knowledge on the neurobiology of these conditions is less than sufficient as exemplified by the high proportion of patients who do not respond to currently available medications targeting monoaminergic systems. The search for new therapeutical strategies became therefore a "hot topic" in neuroscience, and there is a large body of evidence suggesting that brain neuropeptides not only participate is stress physiology, but they may also have clinical relevance. Based on data obtained in animal studies, neuropeptides and their receptors might be targeted by new candidate neuropharmacons with the hope that they will become important and effective tools in the management of stress related mood disorders. In this review, we attempt to summarize the latest evidence obtained using animal models for mood disorders, genetically modified rodent models for anxiety and depression, and we will pay some attention to previously published clinical data on corticotropin releasing factor, urocortin 1, urocortin 2, urocortin 3, arginine-vasopressin, neuropeptide Y, pituitary adenylate-cyclase activating polypeptide, neuropeptide S, oxytocin, substance P and galanin fields of stress research.
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Affiliation(s)
- Viktória Kormos
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary; Molecular Pharmacology Research Group, János Szentágothai Research Center, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary; Department of Anatomy, Faculty of Medicine, University of Pécs, Szigeti u. 12, H-7624 Pécs, Hungary
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31
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Kovács KJ. CRH: The link between hormonal-, metabolic- and behavioral responses to stress. J Chem Neuroanat 2013; 54:25-33. [DOI: 10.1016/j.jchemneu.2013.05.003] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/15/2013] [Indexed: 02/06/2023]
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Callahan LB, Tschetter KE, Ronan PJ. Inhibition of corticotropin releasing factor expression in the central nucleus of the amygdala attenuates stress-induced behavioral and endocrine responses. Front Neurosci 2013; 7:195. [PMID: 24194694 PMCID: PMC3810776 DOI: 10.3389/fnins.2013.00195] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 10/08/2013] [Indexed: 11/13/2022] Open
Abstract
Corticotropin releasing factor (CRF) is a primary mediator of endocrine, autonomic and behavioral stress responses. Studies in both humans and animal models have implicated CRF in a wide-variety of psychiatric conditions including anxiety disorders such as post-traumatic stress disorder (PTSD), depression, sleep disorders and addiction among others. The central nucleus of the amygdala (CeA), a key limbic structure with one of the highest concentrations of CRF-producing cells outside of the hypothalamus, has been implicated in anxiety-like behavior and a number of stress-induced disorders. This study investigated the specific role of CRF in the CeA on both endocrine and behavioral responses to stress. We used RNA Interference (RNAi) techniques to locally and specifically knockdown CRF expression in CeA. Behavior was assessed using the elevated plus maze (EPM) and open field test (OF). Knocking down CRF expression in the CeA had no significant effect on measures of anxiety-like behavior in these tests. However, it did have an effect on grooming behavior, a CRF-induced behavior. Prior exposure to a stressor sensitized an amygdalar CRF effect on stress-induced HPA activation. In these stress-challenged animals silencing CRF in the CeA significantly attenuated corticosterone responses to a subsequent behavioral stressor. Thus, it appears that while CRF projecting from the CeA does not play a significant role in the expression stress-induced anxiety-like behaviors on the EPM and OF it does play a critical role in stress-induced HPA activation.
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Affiliation(s)
- Leah B Callahan
- Avera Research Institute, Avera McKennan Hospital and University Health Center Sioux Falls, SD, USA ; Neuroscience Group, Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine Vermillion, SD, USA ; Department of Psychiatry, University of South Dakota Sanford School of Medicine Sioux Falls, SD, USA ; Research Service, Sioux Falls VA Health Care System Sioux Falls, SD, USA
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Beckerman MA, Van Kempen TA, Justice NJ, Milner TA, Glass MJ. Corticotropin-releasing factor in the mouse central nucleus of the amygdala: ultrastructural distribution in NMDA-NR1 receptor subunit expressing neurons as well as projection neurons to the bed nucleus of the stria terminalis. Exp Neurol 2012; 239:120-32. [PMID: 23063907 DOI: 10.1016/j.expneurol.2012.10.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 09/21/2012] [Accepted: 10/05/2012] [Indexed: 12/16/2022]
Abstract
Corticotropin-releasing factor (CRF) and glutamate are critical signaling molecules in the central nucleus of the amygdala (CeA). Central amygdala CRF, acting via the CRF type 1 receptor (CRF-R1), plays an integral role in stress responses and emotional learning, processes that are generally known to involve functional NMDA-type glutamate receptors. There is also evidence that CRF expressing CeA projection neurons to the bed nucleus of the stria terminalis (BNST) play an important role in stress related behaviors. Despite the potentially significant interactions between CRF and NMDA receptors in the CeA, the synaptic organization of these systems is largely unknown. Using dual labeling high resolution immunocytochemical electron microscopy, it was found that individual somata and dendrites displayed immunoreactivity for CRF and the NMDA-NR1 (NR1) subunit in the mouse CeA. In addition, CRF-containing axon terminals contacted postsynaptic targets in the CeA, some of which also expressed NR1. Neuronal profiles expressing the CRF type 1 receptor (CRF-R1), identified by the expression of green fluorescent protein (GFP) in bacterial artificial chromosome (BAC) transgenic mice, also contained NR1, and GFP immunoreactive terminals formed synapses with NR1 containing dendrites. Although CRF and GFP were only occasionally co-expressed in individual somata and dendritic profiles, contacts between labeled axon terminals and dendrites were frequently observed. A combination of tract tracing and immunocytochemistry revealed that a population of CeA CRF neurons projected to the BNST. It was also found that CRF, or GFP expressing terminals directly contacted CeA-BNST projection neurons. These results indicate that the NMDA receptor is positioned for the postsynaptic regulation of CRF expressing CeA neurons and the modulation of signals conveyed by CRF inputs. Interactions between CRF and NMDA receptor mediated signaling in CeA neurons, including those projecting to the BNST, may provide the synaptic basis for integrating the experience of stress and relevant environmental stimuli with behaviors that may be of particular relevance to stress-related learning and the emergence of psychiatric disorders, including drug addiction.
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Affiliation(s)
- Marc A Beckerman
- Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, NY 10065, USA
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Byrnes EM, Casey K, Bridges RS. Reproductive experience modifies the effects of estrogen receptor alpha activity on anxiety-like behavior and corticotropin releasing hormone mRNA expression. Horm Behav 2012; 61:44-9. [PMID: 22033279 PMCID: PMC3264805 DOI: 10.1016/j.yhbeh.2011.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/15/2011] [Accepted: 10/01/2011] [Indexed: 02/07/2023]
Abstract
Previous studies have demonstrated that prior reproductive experience can influence anxiety-like behaviors, although neural mechanisms underlying this shift remain unknown. Studies in virgin females suggest that activation of the two estrogen receptor subtypes, ERα and ERβ, have differing effects on anxiety. Specifically, ERβ activation has been shown to reduce anxiety-like behaviors, while ERα activation has no significant effect. The purpose of the present study was to examine the possible roles of ERα and ERβ subtypes in parity-induced alterations in anxiety-like behavior, as tested on the elevated plus maze (EPM). Groups of ovariectomized, age-matched, nulliparous and primiparous females were tested on the EPM following administration of the ERα agonist 4,4',4''-(4-Propyl-{1H}-pyrazole-1,3,5-tryl)trisphenol (PPT; 1 mg/kg), the ERβ agonist Diarylpropionitrile (DPN; 1 mg/kg) or vehicle (DMSO). All drugs were administered once daily for 4 days prior to testing as this dosing paradigm has previously been used to demonstrate anxiolytic effects of DPN in virgin rats. In addition, as exposure to the EPM is a psychological stressor, physiological markers of the stress response were measured in both plasma (corticosterone) and brain (corticotropin releasing hormone; CRH) post-EPM testing. Unexpectedly, the ERα agonist PPT selectively increased the time spent exploring the open arms of the EPM in non-lactating, primiparous females, with no significant effects of DPN observed in either nulliparous or primiparous subjects. All females administered PPT and tested on the EPM demonstrated significantly reduced corticosterone secretion when compared to vehicle-treated controls. In addition, significant effects of both reproductive experience and PPT administration on CRH mRNA expression were observed in both the paraventricular nucleus and amygdala using qPCR. These findings indicate that reproductive experience modulates the effects of ERα activation on both EPM behavior related to anxiety and CRH gene expression.
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Affiliation(s)
- Elizabeth M Byrnes
- Department of Biomedical Sciences, Tufts University, Cummings School of Veterinary Medicine, North Grafton, MA 01536, USA.
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Meng QY, Chen XN, Tong DL, Zhou JN. Stress and glucocorticoids regulated corticotropin releasing factor in rat prefrontal cortex. Mol Cell Endocrinol 2011; 342:54-63. [PMID: 21664419 DOI: 10.1016/j.mce.2011.05.035] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Revised: 04/22/2011] [Accepted: 05/23/2011] [Indexed: 11/28/2022]
Abstract
Corticotropin releasing factor (CRF) is considered as the central driving force in the stress response and plays a key role in the pathogenesis of depression. CRF neurons have been identified to locate in most regions of the prefrontal cortex (PFC), a brain region that is highly associated with the control of emotion and cognition. However, little is known on the regulation of CRF in this region. In this study, we aimed to identify the regulatory effect of acute restraint stress and glucocorticoid on PFC CRF and characterize the possible function of CRF in the PFC. We found that acute restraint stress increased and glucocorticoid decreased PFC CRF mRNA expression. The expression of glucocorticoid receptor (GR) was found to colocalize with CRF neurons in the PFC. In addition, recruitment of GR by the CRF promoter was observed in vivo. Specific attention was paid to the effect of CRF on CRF receptor 1 (CRFR1) expression in primary PFC cultures. The results showed that CRF increased CRFR1 expression through the MEK-ERK1/2 pathway. In summary, this study may contribute to the better understanding of CRF functions in the PFC.
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MESH Headings
- Animals
- Cells, Cultured
- Corticotropin-Releasing Hormone/genetics
- Corticotropin-Releasing Hormone/metabolism
- Depression/pathology
- Glucocorticoids/pharmacology
- MAP Kinase Signaling System
- Male
- Prefrontal Cortex/metabolism
- Promoter Regions, Genetic
- RNA, Messenger/biosynthesis
- RNA, Messenger/drug effects
- RNA, Messenger/genetics
- Rats
- Rats, Sprague-Dawley
- Receptors, Corticotropin-Releasing Hormone/genetics
- Receptors, Corticotropin-Releasing Hormone/metabolism
- Receptors, Glucocorticoid/biosynthesis
- Stress, Physiological
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Affiliation(s)
- Qing-Yuan Meng
- CAS Key Laboratory of Brain Function and Diseases, School of Life Sciences, University of Science and Technology of China, Jinzhai road 96, Hefei 230026, Anhui, PR China
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Wyrwoll CS, Holmes MC, Seckl JR. 11β-hydroxysteroid dehydrogenases and the brain: from zero to hero, a decade of progress. Front Neuroendocrinol 2011; 32:265-86. [PMID: 21144857 PMCID: PMC3149101 DOI: 10.1016/j.yfrne.2010.12.001] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 12/01/2010] [Accepted: 12/01/2010] [Indexed: 12/11/2022]
Abstract
Glucocorticoids have profound effects on brain development and adult CNS function. Excess or insufficient glucocorticoids cause myriad abnormalities from development to ageing. The actions of glucocorticoids within cells are determined not only by blood steroid levels and target cell receptor density, but also by intracellular metabolism by 11β-hydroxysteroid dehydrogenases (11β-HSD). 11β-HSD1 regenerates active glucocorticoids from their inactive 11-keto derivatives and is widely expressed throughout the adult CNS. Elevated hippocampal and neocortical 11β-HSD1 is observed with ageing and causes cognitive decline; its deficiency prevents the emergence of cognitive defects with age. Conversely, 11β-HSD2 is a dehydrogenase, inactivating glucocorticoids. The major central effects of 11β-HSD2 occur in development, as expression of 11β-HSD2 is high in fetal brain and placenta. Deficient feto-placental 11β-HSD2 results in a life-long phenotype of anxiety and cardiometabolic disorders, consistent with early life glucocorticoid programming.
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Affiliation(s)
- Caitlin S Wyrwoll
- Endocrinology Unit, Centre for Cardiovascular Science, Queen's Medical Research Institute, The University of Edinburgh, Edinburgh EH16 4TJ, UK.
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Calvez J, Fromentin G, Nadkarni N, Darcel N, Even P, Tomé D, Ballet N, Chaumontet C. Inhibition of food intake induced by acute stress in rats is due to satiation effects. Physiol Behav 2011; 104:675-83. [PMID: 21787797 DOI: 10.1016/j.physbeh.2011.07.012] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 07/07/2011] [Accepted: 07/08/2011] [Indexed: 11/17/2022]
Abstract
Acute mild stress induces an inhibition of food intake in rats. In most studies, the cumulative daily food intake is measured but this only provides a quantitative assessment of ingestive behavior. The present study was designed to analyze the reduction in food intake induced by acute stress and to understand which behavioral and central mechanisms are responsible for it. Two different stressors, restraint stress (RS) and forced swimming stress (FSS), were applied acutely to male Wistar rats. We first measured corticosterone and ACTH in plasma samples collected immediately after acute RS and FSS in order to validate our stress models. We measured food intake after RS and FSS and determined meal patterns and behavioral satiety sequences. The expressions of CRF, NPY and POMC in the hypothalamus were also determined immediately after acute RS and FSS. The rise in corticosterone and ACTH levels after both acute RS and FSS validated our models. Furthermore, we showed that acute stress induced a reduction in cumulative food intake which lasted the whole day for RS but only for the first hour after FSS. For both stressors, this stress-induced food intake inhibition was explained by a decrease in meal size and duration, but there was no difference in ingestion speed. The behavioral satiety sequence was preserved after RS and FSS but grooming was markedly increased, which thus competed with, and could reduce, other behaviors, including eating. Lastly, we showed that RS induced an increase in hypothalamic POMC expression. These results suggest that acute stress may affect ingestive behavior by increasing satiation and to some extent by enhancing grooming, and this may be due to stimulation of the hypothalamic POMC neurons.
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Affiliation(s)
- J Calvez
- INRA, UMR914 Nutrition Physiology and Ingestive Behavior, F-75005 Paris, France
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Brunton PJ, Russell JA. Neuroendocrine control of maternal stress responses and fetal programming by stress in pregnancy. Prog Neuropsychopharmacol Biol Psychiatry 2011; 35:1178-91. [PMID: 21216265 DOI: 10.1016/j.pnpbp.2010.12.023] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Revised: 12/30/2010] [Accepted: 12/31/2010] [Indexed: 02/07/2023]
Abstract
The major changes in highly dynamic neuroendocrine systems that are essential for establishing and maintaining pregnancy are outlined from studies on rodents. These changes optimise the internal environment to provide the life support system for the placenta, embryo and fetus. These include automatic prevention of further pregnancy, blood volume expansion, increased appetite and energy storage. The brain regulates these changes, in response to steroid (estrogens, progesterone) and peptide (lactogens, relaxin) hormone signals. Activation of inhibitory endogenous opioid mechanisms in the brain in late pregnancy restrains premature secretion of oxytocin, and attenuates hypothalamo-pituitary-adrenal (HPA) responses to stress. This opioid mechanism is activated by allopregnanolone, a neuroactive progesterone metabolite. The significance of reduced HPA axis responses in shifting maternal metabolic balance, and in protecting the fetuses from adverse programming of HPA axis stress responsiveness and anxious behaviour in later life is critically discussed. Experimental studies showing sex-dependent fetal programming by maternal stress or glucocorticoid exposure in late pregnancy are reviewed. The possibility of over-writing programming in offspring through neurosteroid administration is discussed. The impact of maternal stress on placental function is considered in the context of reconciling studies that show offspring programming by stress in very early or late pregnancy produce similar phenotypes in the offspring.
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Affiliation(s)
- Paula J Brunton
- Laboratory of Neuroendocrinology, Centre for Integrative Physiology, Hugh Robson Building, George Square, University of Edinburgh, Edinburgh EH89XD, UK
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Species-relevant inescapable stress differently influences memory consolidation and retrieval of mice in a spatial radial arm maze. Behav Brain Res 2011; 219:142-8. [DOI: 10.1016/j.bbr.2010.12.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 12/22/2010] [Accepted: 12/27/2010] [Indexed: 11/18/2022]
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Porter K, Hayward LF. Stress-induced changes in c-Fos and corticotropin releasing hormone immunoreactivity in the amygdala of the spontaneously hypertensive rat. Behav Brain Res 2011; 216:543-51. [PMID: 20832430 PMCID: PMC2981617 DOI: 10.1016/j.bbr.2010.08.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 08/23/2010] [Accepted: 08/24/2010] [Indexed: 12/26/2022]
Abstract
The present study was undertaken to test the hypothesis that dysregulation of the amygdala contributes to the exaggerated autonomic response to stress in an animal model of essential hypertension. Spontaneously hypertensive (SHR) and normotensive Wistar male rats were chronically instrumented and exposed to 20 min of either air jet stress (AJS) or air noise alone (CON). AJS induced a significant increase in both heart rate and arterial pressure that was greater in the SHR. AJS induced a significant increase in c-Fos-like immunoreactivity (FLI) throughout the caudal-rostral extent of the basolateral, medial, and central (CEA) subnuclei of the amygdala. Differences in FLI between strains were localized to the rostral CEA and the SHR expressed significantly less FLI. AJS also induced a significant increase in the number of corticotrophin releasing hormone (CRH) positive neurons in the CEA. Differences between strains were localized to the caudal CEA and the number of CRH-positive cells was significantly greater in the SHR. The stress-induced increase in CRH labeling in caudal CEA of the SHR was coupled to a greater increase in FLI in the rostral locus coeruleus (LC) of the SHR versus the Wistar. AJS also induced significant increases in FLI in several hypothalamus subnuclei, but no strain-related differences were identified. These results suggest for the first time that dysregulation of CRH-positive cells in the caudal CEA and reduced excitation and/or exaggerated inhibition of rostral CEA neurons may contribute to the exaggerated cardiovascular response to stress in the SHR, possibly through descending modulation of the rostral LC.
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Affiliation(s)
- Karen Porter
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32610, United States
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41
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Abstract
The hypothalamic-pituitary-adrenal (HPA) axis plays a key role in the neuroendocrine response to stress. Dynamic changes in HPA axis regulation and hence HPA responsivity occur over the lifetime of an animal. This article focuses on two extremes of the spectrum. The first occurs naturally during pregnancy when stress responses are dampened. The second, at the opposite end of the scale, occurs in offspring of mothers who were exposed to stress during pregnancy and display exaggerated HPA axis stress responses. Reduced glucocorticoid output in response to stress in pregnancy may have important consequences for conserving energy supply to the foetus(es), in modulating immune system adaptations and in protecting against adverse foetal programming by glucocorticoids. Understanding the mechanisms underpinning this adaptation in pregnancy may provide insights for manipulating HPA axis responsiveness in later life, particularly in the context of resetting HPA axis hyperactivity associated with prenatal stress exposure, which may underlie several major pathologies, including cardiovascular disease, diabetes mellitus type 2, obesity, cognitive decline and mood disorders.
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Affiliation(s)
- P J Brunton
- Centre for Integrative Physiology, University of Edinburgh, Edinburgh, UK.
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Martinez RC, Carvalho-Netto EF, Ribeiro-Barbosa ER, Baldo MVC, Canteras NS. Amygdalar roles during exposure to a live predator and to a predator-associated context. Neuroscience 2010; 172:314-28. [PMID: 20955766 DOI: 10.1016/j.neuroscience.2010.10.033] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 09/22/2010] [Accepted: 10/09/2010] [Indexed: 10/18/2022]
Abstract
The amygdala plays a critical role in determining the emotional significance of sensory stimuli and the production of fear-related responses. Large amygdalar lesions have been shown to practically abolish innate defensiveness to a predator; however, it is not clear how the different amygdalar systems participate in the defensive response to a live predator. Our first aim was to provide a comprehensive analysis of the amygdalar activation pattern during exposure to a live cat and to a predator-associated context. Accordingly, exposure to a live predator up-regulated Fos expression in the medial amygdalar nucleus (MEA) and in the lateral and posterior basomedial nuclei, the former responding to predator-related pheromonal information and the latter two nuclei likely to integrate a wider array of predatory sensory information, ranging from olfactory to non-olfactory ones, such as visual and auditory sensory inputs. Next, we tested how the amygdalar nuclei most responsive to predator exposure (i.e. the medial, posterior basomedial and lateral amygdalar nuclei) and the central amygdalar nucleus (CEA) influence both unconditioned and contextual conditioned anti-predatory defensive behavior. Medial amygdalar nucleus lesions practically abolished defensive responses during cat exposure, whereas lesions of the posterior basomedial or lateral amygdalar nuclei reduced freezing and increased risk assessment displays (i.e. crouch sniff and stretch postures), a pattern of responses compatible with decreased defensiveness to predator stimuli. Moreover, the present findings suggest a role for the posterior basomedial and lateral amygdalar nuclei in the conditioning responses to a predator-related context. We have further shown that the CEA does not seem to be involved in either unconditioned or contextual conditioned anti-predatory responses. Overall, the present results help to clarify the amygdalar systems involved in processing predator-related sensory stimuli and how they influence the expression of unconditioned and contextual conditioned anti-predatory responses.
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Affiliation(s)
- R C Martinez
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP 05508-000, Brazil
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Sutherland JE, Burian LC, Covault J, Conti LH. The effect of restraint stress on prepulse inhibition and on corticotropin-releasing factor (CRF) and CRF receptor gene expression in Wistar-Kyoto and Brown Norway rats. Pharmacol Biochem Behav 2010; 97:227-38. [PMID: 20709096 DOI: 10.1016/j.pbb.2010.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 07/24/2010] [Accepted: 08/07/2010] [Indexed: 10/19/2022]
Abstract
Stress plays a role in many psychiatric disorders that are characterized by deficits in prepulse inhibition (PPI), a form of sensorimotor gating. Corticotropin-releasing factor (CRF) is one of the most important neurotransmitters involved in behavioral components of the stress response, and central infusion of CRF decreases PPI in rodents. We recently demonstrated that restraint stress decreases PPI and attenuates the increase in PPI caused by repeated testing. To broaden our investigation into how restraint affects PPI, we subjected Wistar-Kyoto (WKY) and Brown Norway (BN) rats to 10 consecutive days of 2-hour restraint, or to brief handling, prior to assessing PPI. We next examined the effects of 1 or 10days of 2-hour restraint on plasma corticosterone levels in order to determine whether the endocrine response to stress parallels the behavioral effect of stress. Finally, we examined the effects of 1 or 10days of 2-hour restraint on CRF and CRF receptor gene expression in the amygdala, hippocampus, frontal cortex, and hypothalamus in order to determine whether a temporal pattern of gene expression parallels the change in the behavioral response to stress. The major findings of the present study are that 1) restraint stress attenuates the increase in PPI caused by repeated testing in both WKY and BN rats, and BN rats are more sensitive to the effects of restraint on PPI than WKY rats, 2) restraint-induced increases in corticosterone levels mirror the effect of restraint on PPI in WKY rats but not in BN rats, 3) laterality effects on gene expression were observed for the amygdala, whereby restraint increases CRF gene expression in the left, but not right, amygdala, and 4) some restraint-induced changes in CRF and CRF receptor gene expression precede changes in PPI while other changes coincide with altered PPI in a rat strain- and brain region-dependent manner.
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Affiliation(s)
- Jane E Sutherland
- Department of Psychiatry, University of Connecticut Health Center, Farmington, CT 06030, USA
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Wang SS, Yan XB, Hofman MA, Swaab DF, Zhou JN. Increased expression level of corticotropin-releasing hormone in the amygdala and in the hypothalamus in rats exposed to chronic unpredictable mild stress. Neurosci Bull 2010; 26:297-303. [PMID: 20651811 PMCID: PMC5552574 DOI: 10.1007/s12264-010-0329-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 05/11/2010] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE Corticotropin-releasing hormone (CRH) plays an important role in neuroendocrine, autonomic and behavioral responses to stressors. In the present study, the effect of chronic unpredictable mild stress (CUMS) on CRH neurons was investigated in rat brain. METHODS The rats were exposed to one of the stressors each day for 21 d. Immunostaining was performed to detect the CRH-positive neurons in the paraventricular nucleus (PVN) of the hypothalamus and in amygdala. RESULTS After the stress protocol, the animals showed a reduction in body weight gain as well as reduced sucrose preference and locomotor activity. Interestingly, the CRH neurons in both PVN and central nucleus of the amygdala (CeA) were stimulated by CUMS. The densities of CRH-containing neurons in both PVN and CeA were significantly higher than those in control group. CONCLUSION The CRH systems in PVN and CeA may both contribute to depression-like behaviors during CUMS.
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Affiliation(s)
- Shan-Shan Wang
- Department of Neurology, Clinical Division of Nanlou, Chinese PLA General Hospital, Beijing, 100853 China
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Neurobiology and Biophysics, Life Science School, University of Science and Technology of China, Hefei, 230027 China
| | - Xue-Bo Yan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Neurobiology and Biophysics, Life Science School, University of Science and Technology of China, Hefei, 230027 China
| | - Michel A. Hofman
- Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Science, Amsterdam, 1105BA the Netherlands
| | - Dick F. Swaab
- Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Science, Amsterdam, 1105BA the Netherlands
| | - Jiang-Ning Zhou
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Neurobiology and Biophysics, Life Science School, University of Science and Technology of China, Hefei, 230027 China
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Developing a neurobehavioral animal model of infant attachment to an abusive caregiver. Biol Psychiatry 2010; 67:1137-45. [PMID: 20163787 PMCID: PMC3929962 DOI: 10.1016/j.biopsych.2009.12.019] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 12/13/2009] [Accepted: 12/14/2009] [Indexed: 01/06/2023]
Abstract
BACKGROUND Both abused and well cared for infants show attachment to their caregivers, although the quality of that attachment differs. Moreover, the infant's attachment to the abusive caregiver is associated with compromised mental health, especially under stress. In an attempt to better understand how abuse by the caregiver can compromise mental health, we explore the neural basis of attachment in both typical and abusive environments using infant rats, which form attachments to the mother through learning her odor. Here, we hypothesize that the neural circuitry for infant attachment differs based on the quality of the attachment, which can be uncovered during stressful situations. METHODS We used infant rats to compare infant attachment social behaviors and supporting neurobiology using natural maternal odor, as well as two odor-learning attachment paradigms: odor-stroke (mimics typical attachment) and odor-.5 mA shock conditioning (mimics abusive attachment). Next, to uncover differences in behavior and brain, these pups were injected with systemic corticosterone. Finally, pups were reared with an abusive mother to determine ecological relevance. RESULTS Our results suggest that the natural and learned attachment odors indistinguishably control social behavior in infancy (approach to the odor and interactions with the mother). However, with corticosterone injection, pups with an abusive attachment show disrupted infant social behavior with the mother and engagement of the amygdala. CONCLUSIONS This animal model of attachment accommodates both abusive and typical attachment and suggests that pups' social behavior and underlying neural circuitry may provide clues to understanding attachment in children with various conditions of care.
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Early-life stress disrupts attachment learning: the role of amygdala corticosterone, locus ceruleus corticotropin releasing hormone, and olfactory bulb norepinephrine. J Neurosci 2010; 29:15745-55. [PMID: 20016090 DOI: 10.1523/jneurosci.4106-09.2009] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Infant rats require maternal odor learning to guide pups' proximity-seeking of the mother and nursing. Maternal odor learning occurs using a simple learning circuit including robust olfactory bulb norepinephrine (NE), release from the locus ceruleus (LC), and amygdala suppression by low corticosterone (CORT). Early-life stress increases NE but also CORT, and we questioned whether early-life stress disrupted attachment learning and its neural correlates [2-deoxyglucose (2-DG) autoradiography]. Neonatal rats were normally reared or stressed-reared during the first 6 d of life by providing the mother with insufficient bedding for nest building and were odor-0.5 mA shock conditioned at 7 d old. Normally reared paired pups exhibited typical odor approach learning and associated olfactory bulb enhanced 2-DG uptake. However, stressed-reared pups showed odor avoidance learning and both olfactory bulb and amygdala 2-DG uptake enhancement. Furthermore, stressed-reared pups had elevated CORT levels, and systemic CORT antagonist injection reestablished the age-appropriate odor-preference learning, enhanced olfactory bulb, and attenuated amygdala 2-DG. We also assessed the neural mechanism for stressed-reared pups' abnormal behavior in a more controlled environment by injecting normally reared pups with CORT. This was sufficient to produce odor aversion, as well as dual amygdala and olfactory bulb enhanced 2-DG uptake. Moreover, we assessed a unique cascade of neural events for the aberrant effects of stress rearing: the amygdala-LC-olfactory bulb pathway. Intra-amygdala CORT or intra-LC corticotropin releasing hormone (CRH) infusion supported aversion learning with intra-LC CRH infusion associated with increased olfactory bulb NE (microdialysis). These results suggest that early-life stress disturbs attachment behavior via a unique cascade of events (amygdala-LC-olfactory bulb).
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Davis M, Walker DL, Miles L, Grillon C. Phasic vs sustained fear in rats and humans: role of the extended amygdala in fear vs anxiety. Neuropsychopharmacology 2010; 35:105-35. [PMID: 19693004 PMCID: PMC2795099 DOI: 10.1038/npp.2009.109] [Citation(s) in RCA: 1028] [Impact Index Per Article: 73.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 06/26/2009] [Accepted: 07/14/2009] [Indexed: 01/11/2023]
Abstract
Data will be reviewed using the acoustic startle reflex in rats and humans based on our attempts to operationally define fear vs anxiety. Although the symptoms of fear and anxiety are very similar, they also differ. Fear is a generally adaptive state of apprehension that begins rapidly and dissipates quickly once the threat is removed (phasic fear). Anxiety is elicited by less specific and less predictable threats, or by those that are physically or psychologically more distant. Thus, anxiety is a more long-lasting state of apprehension (sustained fear). Rodent studies suggest that phasic fear is mediated by the amygdala, which sends outputs to the hypothalamus and brainstem to produce symptoms of fear. Sustained fear is also mediated by the amygdala, which releases corticotropin-releasing factor, a stress hormone that acts on receptors in the bed nucleus of the stria terminalis (BNST), a part of the so-called 'extended amygdala.' The amygdala and BNST send outputs to the same hypothalamic and brainstem targets to produce phasic and sustained fear, respectively. In rats, sustained fear is more sensitive to anxiolytic drugs. In humans, symptoms of clinical anxiety are better detected in sustained rather than phasic fear paradigms.
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Affiliation(s)
- Michael Davis
- Department of Psychiatry, Yerkes National Primate Center, Emory University, and the Center for Behavioral Neuroscience, Atlanta, GA 30329, USA.
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Walker DL, Miles LA, Davis M. Selective participation of the bed nucleus of the stria terminalis and CRF in sustained anxiety-like versus phasic fear-like responses. Prog Neuropsychopharmacol Biol Psychiatry 2009; 33:1291-308. [PMID: 19595731 PMCID: PMC2783512 DOI: 10.1016/j.pnpbp.2009.06.022] [Citation(s) in RCA: 258] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 06/26/2009] [Accepted: 06/29/2009] [Indexed: 01/09/2023]
Abstract
The medial division of the central nucleus of the amygdala (CeA(M)) and the lateral division of the bed nucleus of the stria terminalis (BNST(L)) are closely related. Both receive projections from the basolateral amygdala (BLA) and both project to brain areas that mediate fear-influenced behaviors. In contrast to CeA(M) however, initial attempts to implicate the BNST in conditioned fear responses were largely unsuccessful. More recent studies have shown that the BNST does participate in some types of anxiety and stress responses. Here, we review evidence suggesting that the CeA(M) and BNST(L) are functionally complementary, with CeA(M) mediating short- but not long-duration threat responses (i.e., phasic fear) and BNST(L) mediating long- but not short-duration responses (sustained fear or 'anxiety'). We also review findings implicating the stress-related peptide corticotropin-releasing factor (CRF) in sustained but not phasic threat responses, and attempt to integrate these findings into a neural circuit model which accounts for these and related observations.
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Affiliation(s)
- D. L. Walker
- Department of Psychiatry and Behavioral Sciences, School of Medicine, Emory University, Atlanta, GA, USA,Correspondence should be addressed to: David L. Walker, Emory University School of Medicine, 954 Gatewood Road NE, Yerkes Neurosci Bldg – Rm 5214, Atlanta, GA 30329, Ph: (404) 727-3587, Fax: (404) 727-8070,
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- Department of Psychiatry and Behavioral Sciences, School of Medicine, Emory University, Atlanta, GA, USA,The Center for Behavior Neurosci, Emory University, Atlanta, GA, USA
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Watanabe MA, Kucenas S, Bowman TA, Ruhlman M, Knuepfer MM. Angiotensin II and CRF receptors in the central nucleus of the amygdala mediate hemodynamic response variability to cocaine in conscious rats. Brain Res 2009; 1309:53-65. [PMID: 19879859 DOI: 10.1016/j.brainres.2009.10.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Revised: 10/23/2009] [Accepted: 10/23/2009] [Indexed: 11/25/2022]
Abstract
Stress or cocaine evokes either a large increase in systemic vascular resistance (SVR) or a smaller increase in SVR accompanied by an increase in cardiac output (designated vascular and mixed responders, respectively) in Sprague-Dawley rats. We hypothesized that the central nucleus of the amygdala (CeA) mediates this variability. Conscious, freely-moving rats, instrumented for measurement of arterial pressure and cardiac output and for drug delivery into the CeA, were given cocaine (5 mg/kg, iv, 4-6 times) and characterized as vascular (n=15) or mixed responders (n=10). Subsequently, we administered cocaine after bilateral microinjections (100 nl) of saline or selective agents in the CeA. Muscimol (80 pmol), a GABA(A) agonist, or losartan (43.4 pmol), an AT(1) receptor antagonist, attenuated the cocaine-induced increase in SVR in vascular responders, selectively, such that vascular responders were no longer different from mixed responders. The corticotropin releasing factor (CRF) antagonist, alpha-helical CRF(9-41) (15.7 pmol), abolished the difference between cardiac output and SVR in mixed and vascular responders. We conclude that greater increases in SVR observed in vascular responders are dependent on AT(1) receptor activation and, to a lesser extent on CRF receptors. Therefore, AT(1) and CRF receptors in the CeA contribute to hemodynamic response variability to intravenous cocaine.
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Affiliation(s)
- Mari A Watanabe
- Department of Pharmacological and Physiological Science, St. Louis University School of Medicine, 1402 S. Grand Blvd., St. Louis, MO 63104, USA
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Shalyapina VG, Mokrushin AA, Khama-Murad AK, Semenova OG. Effects of corticoliberin on synaptic transmission in rat olfactory cortex slices in a water immersion model of depression. ACTA ACUST UNITED AC 2009; 39:701-7. [PMID: 19621274 DOI: 10.1007/s11055-009-9176-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Indexed: 11/26/2022]
Abstract
Corticoliberin (corticotrophin-releasing factor, CRF, CRH) is an active regulator of endocrine, autonomic, and immune functions in stress, as well as a mediator of anxiety, determining the behavioral stress response. The present report describes studies of its action on neuron activity evoked by microstimulation of olfactory cortex slices. Behavioral testing in a T maze was used to select individuals with a passive behavioral strategy from a population of Wistar rats, and the animals were subjected to water immersion. Olfactory cortex slices were prepared 10 days later and evoked focal potentials were recorded on perfusion with medium containing corticoliberin (0.1 microM). Among active rats, 60% of slices retained high excitability after stress, and corticoliberin produced only insignificant reductions in the amplitudes of excitatory potentials in these slices, simultaneously increasing the amplitudes of inhibitory potentials. Low excitability was found in 40% of slices from active stressed rats, and corticoliberin had a significant inhibitory effect in these slices. Addition of corticoliberin to the incubation medium used for slices from passive rats with initially low excitability led to complete blockade of synaptic transmission. These data support the involvement of corticoliberin in the development of depression.
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Affiliation(s)
- V G Shalyapina
- I. P. Pavlov Institute of Physiology, Russian Academy of Sciences, 6 Makarov Bank, 199034, St. Petersburg, Russia.
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