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Brannan S, Garbe L, Richardson BD. Early life stress induced sex-specific changes in behavior is paralleled by altered locus coeruleus physiology in BALB/cJ mice. Neurobiol Stress 2024; 33:100674. [PMID: 39385751 PMCID: PMC11462065 DOI: 10.1016/j.ynstr.2024.100674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2024] [Revised: 09/16/2024] [Accepted: 09/17/2024] [Indexed: 10/12/2024] Open
Abstract
Adverse childhood experiences have been associated with many neurodevelopmental and affective disorders including attention deficit hyperactivity disorder and generalized anxiety disorder, with more exposures increasing negative risk. Sex and genetic background are biological variables involved in adverse psychiatric outcomes due to early life trauma. Females in general have an increased prevalence of stress-related psychopathologies beginning after adolescence, indicative of adolescence being a female-specific sensitive period. To understand the underlying neuronal mechanisms potentially responsible for this relationship between genetic background, sex, stress/trauma, and cognitive/affective behaviors, we assessed behavioral and neuronal changes in a novel animal model of early life stress exposure. Male and female BALB/cJ mice that express elevated basal anxiety-like behaviors and differences in monoamine signaling-associated genes, were exposed to an early life variable stress protocol that combined deprivation in early life with unpredictability in adolescence. Stress exposure produced hyperlocomotion and attention deficits (5-choice serial reaction time task) in male and female mice along with female-specific increased anxiety-like behavior. These behavioral changes were paralleled by reduced excitability of locus coeruleus (LC) neurons, due to resting membrane potential hyperpolarization in males and a female-specific increase in action potential delay time. These data describe a novel interaction between sex, genetic background, and early life stress that results in behavioral changes in clinically relevant domains and potential underlying mechanistic lasting changes in physiological properties of neurons in the LC.
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Affiliation(s)
- Savannah Brannan
- Department of Pharmacology, Southern Illinois University – School of Medicine, Springfield, IL, 62702, USA
| | - Lauren Garbe
- Department of Pharmacology, Southern Illinois University – School of Medicine, Springfield, IL, 62702, USA
| | - Ben D. Richardson
- Department of Pharmacology, Southern Illinois University – School of Medicine, Springfield, IL, 62702, USA
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2
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Novak J, Jaric I, Rosso M, Rufener R, Touma C, Würbel H. Handling method affects measures of anxiety, but not chronic stress in mice. Sci Rep 2022; 12:20938. [PMID: 36463282 PMCID: PMC9719500 DOI: 10.1038/s41598-022-25090-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 11/24/2022] [Indexed: 12/07/2022] Open
Abstract
Studies in mice have shown that less aversive handling methods (e.g. tunnel or cup handling) can reduce behavioural measures of anxiety in comparison to picking mice up by their tail. Despite such evidence, tail handling continues to be used routinely. Besides resistance to change accustomed procedures, this may also be due to the fact that current evidence in support of less aversive handling is mostly restricted to effects of extensive daily handling, which may not apply to routine husbandry practices. The aim of our study was to assess whether, and to what extent, different handling methods during routine husbandry induce differences in behavioural and physiological measures of stress in laboratory mice. To put the effects of handling method in perspective with chronic stress, we compared handling methods to a validated paradigm of unpredictable chronic mild stress (UCMS). We housed mice of two strains (Balb/c and C57BL/6) and both sexes either under standard laboratory conditions (CTRL) or under UCMS. Half of the animals from each housing condition were tail handled and half were tunnel handled twice per week, once during a cage change and once for a routine health check. We found strain dependent effects of handling method on behavioural measures of anxiety: tunnel handled Balb/c mice interacted with the handler more than tail handled conspecifics, and tunnel handled CTRL mice showed increased open arm exploration in the elevated plus-maze. Mice undergoing UCMS showed increased plasma corticosterone levels and reduced sucrose preference. However, we found no effect of handling method on these stress-associated measures. Our results therefore indicate that routine tail handling can affect behavioural measures of anxiety, but may not be a significant source of chronic husbandry stress. Our results also highlight strain dependent responses to handling methods.
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Affiliation(s)
- Janja Novak
- grid.5734.50000 0001 0726 5157Animal Welfare Division, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Ivana Jaric
- grid.5734.50000 0001 0726 5157Animal Welfare Division, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Marianna Rosso
- grid.5734.50000 0001 0726 5157Animal Welfare Division, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Reto Rufener
- grid.5734.50000 0001 0726 5157Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, Institute of Parasitology, University of Bern, Bern, Switzerland
| | - Chadi Touma
- grid.10854.380000 0001 0672 4366Department of Behavioural Biology, Osnabrück University, Osnabrück, Germany
| | - Hanno Würbel
- grid.5734.50000 0001 0726 5157Animal Welfare Division, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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3
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Kennedy-Wood K, Ng CAS, Alaiyed S, Foley PL, Conant K. Increased MMP-9 levels with strain-dependent stress resilience and tunnel handling in mice. Behav Brain Res 2021; 408:113288. [PMID: 33836170 PMCID: PMC8102390 DOI: 10.1016/j.bbr.2021.113288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 12/09/2022]
Abstract
Increased perineuronal net (PNN) deposition has been observed in association with corticosteroid administration and stress in rodent models of depression. PNNs are a specialized form of extracellular matrix (ECM) that may enhance GABA-mediated inhibitory neurotransmission to potentially restrict the excitation and plasticity of pyramidal glutamatergic neurons. In contrast, antidepressant administration increases levels of the PNN-degrading enzyme matrix metalloproteinase-9 (MMP-9), which enhances glutamatergic plasticity and neurotransmission. In the present study, we compare pro-MMP-9 levels and measures of stress in females from two mouse strains, C57BL/6 J and BALB/cJ, in the presence or absence of tail grasping versus tunnel-associated cage transfers. Prior work suggests that C57BL/6 J mice show relatively enhanced neuroplasticity and stress resilience, while BALB/c mice demonstrate enhanced susceptibility to adverse effects of stress. Herein we observe that as compared to the C57BL/6 J strain, BALB/c mice demonstrate a higher level of baseline anxiety as determined by elevated plus maze (EPM) testing. Moreover, as determined by open field testing, anxiety is differentially reduced in BALB/c mice by a choice-driven tunnel-entry cage transfer technique. Additionally, as compared to tail-handled C57BL/6 J mice, tail-handled BALB/c mice have reduced brain levels of pro-MMP-9 and increased levels of its endogenous inhibitor, tissue inhibitor of metalloproteinase-1 (TIMP-1); however, tunnel-associated cage transfer increases pro-MMP-9 levels in BALB/c mice. BALB/c mice also show increases in Western blot immunoreactive bands for brevican, a constituent of PNNs. Together, these data support the possibility that MMP-9, an effector of PNN remodeling, contributes to the phenotype of strain and handling-associated differences in behavior.
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Affiliation(s)
| | - Christi Anne S Ng
- Georgetown University Medical Center, Department of Neuroscience, Washington D.C., United States
| | - Seham Alaiyed
- Georgetown University Medical Center, Department of Neuroscience, Washington D.C., United States; Georgetown University Medical Center, Department of Pharmacology, Washington D.C., United States
| | - Patricia L Foley
- Georgetown University Medical Center, Division of Comparative Medicine, Washington D.C., United States.
| | - Katherine Conant
- Georgetown University Medical Center, Department of Neuroscience, Washington D.C., United States.
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Zachariassen LF, Sørensen DB, Krych L, Hansen AK, Hansen CHF. Effects of delivery mode on behavior in mouse offspring. Physiol Behav 2020; 230:113285. [PMID: 33309952 DOI: 10.1016/j.physbeh.2020.113285] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 12/02/2020] [Accepted: 12/08/2020] [Indexed: 12/29/2022]
Abstract
Cesarean section (CS) has been associated with an increased risk of mental disorders in the offspring. This could possibly be explained by an inadequate microbial colonization early in life with a consequential disturbed gut-brain interaction. To investigate the link between delivery mode and behavior and develop a suitable animal model for further research of the gut-brain axis, the aim of this study was to characterize the gut microbiota (GM) together with the behavioral response in various behavioral tests in CS-delivered mice. We hypothesized that mice delivered by CS would present with disturbances in normal physiological behavior possibly due to an inadequate microbial colonization. C57BL/6 mice delivered by CS or vaginal delivery (VD) were cross fostered and, as adults, observed for anxiety-related behavior in the open field test, social deficits in a sociability test and compulsive behavior in the marble burying test. GM was analyzed by 16S rRNA gene amplicon sequencing. The open field test showed that CS-delivered mice had a decreased activity and accelerated defecation compared to VD-delivered mice. In addition, CS-delivered female mice spend less time interacting with cage mates in the sociability test, whereas there was no effect of CS delivery on the average number of marbles buried. In conclusion, CS-delivered mice had a more pronounced anxiety-like behavior and showed less preference for sociability in female offspring.
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Affiliation(s)
- Line Fisker Zachariassen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
| | - Dorte Bratbo Sørensen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Lukasz Krych
- Department of Food Science, Faculty of Science, University of Copenhagen, Denmark
| | - Axel Kornerup Hansen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Camilla Hartmann Friis Hansen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
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5
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Gürağaç Dereli FT, Ilhan M, Küpeli Akkol E. Identification of the main active antidepressant constituents in a traditional Turkish medicinal plant, Centaurea kurdica Reichardt. JOURNAL OF ETHNOPHARMACOLOGY 2020; 249:112373. [PMID: 31689479 DOI: 10.1016/j.jep.2019.112373] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 10/30/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In Turkish folk medicine, infusions and decoctions prepared from the flowers, fruits and aerial parts of Centaurea kurdica Reichardt (Asteraceae) are used as sedative and antidepressant-like effects of various sedative plants have been identified in many studies. The present study was designed to evaluate the antidepressant activity of this plant. MATERIALS AND METHODS n-Hexane, ethyl acetate (EtOAc), and methanol (MeOH) extracts were prepared from the branches with leaves and also flowers of the plant. Antidepressant potentials of these extracts were researched by using the forced swimming test, tail suspension test, and antagonism of tetrabenazine-induced ptosis, hypothermia, and suppression of locomotor activity. RESULTS After determination of high antidepressant potentials of MeOH extract prepared from flowers and n-hexane extract prepared from branches with leaves, isolation studies were carried out on these two extracts and the main active components were determined as β-amyrin, mixture of β-sitosterol and stigmasterol and costunolide for the branches with leaves and quercitrin, isoquercetin and naringenin-7-O-glucopyranoside for the flowers. CONCLUSIONS As a result of the mechanistic and toxicity studies planned on this plant, it is thought that C. kurdica may be a glimmer of hope for depressed patients.
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Affiliation(s)
| | - Mert Ilhan
- Department of Pharmacognosy, Faculty of Pharmacy, Van Yüzüncü Yıl University, Tuşba, 65080, Van, Turkey
| | - Esra Küpeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler, 06330, Ankara, Turkey.
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6
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Kudryashov NV, Kalinina TS, Shimshirt AA, Volkova AV, Narkevich VB, Naplekova PL, Kasabov KA, Kudrin VS, Voronina TA, Fisenko VP. The Behavioral and Neurochemical Aspects of the Interaction between Antidepressants and Unpredictable Chronic Mild Stress. Acta Naturae 2020; 12:63-72. [PMID: 32477600 PMCID: PMC7245955 DOI: 10.32607/actanaturae.10942] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 01/29/2020] [Indexed: 01/28/2023] Open
Abstract
The behavioral and neurochemical effects of amitriptyline (10 mg/kg, i.p.) and fluoxetine (20 mg/kg, i.p.) after single and chronic administration in the setting of unpredictable mild stress in outbred ICR (CD-1) mice were studied. After a 28-day exposure to stress, we observed an increase in depressive reaction in a forced swim test in mice, as well as reduced hippocampal levels of serotonin (5-hydroxytryptamine, 5-HT) and 5-hydroxyindoleacetic acid (5-HIAA) and an increased hypothalamic level of noradrenaline (NA). Single and chronic administration of amitriptyline and fluoxetine shortened the immobility period and increased the time corresponding to active swimming in the forced swim test. The antidepressant-like effect of fluoxetine - but not of amitriptyline - after a single injection coincided with an increase in the 5-HT turnover in the hippocampus. Chronic administration of the antidepressants increased the hypothalamic levels of NA. Thus, the antidepressant- like effect of amitriptyline and fluoxetine may result from an enhancement of the stress-dependent adaptive mechanisms depleted by chronic stress.
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Affiliation(s)
- N. V. Kudryashov
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
- Sechenov First Moscow State Medical University (Sechenov University), Moscow, 119991 Russia
- N.K. Koltsov Institute of Developmental Biology RAS, Moscow, 119334 Russia
| | - T. S. Kalinina
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
- N.K. Koltsov Institute of Developmental Biology RAS, Moscow, 119334 Russia
| | - A. A. Shimshirt
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - A. V. Volkova
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - V. B. Narkevich
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - P. L. Naplekova
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - K. A. Kasabov
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - V. S. Kudrin
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - T. A. Voronina
- Federal State Budgetary Institution «Research Zakusov Institute of Pharmacology», Moscow, 125315 Russia
| | - V. P. Fisenko
- Sechenov First Moscow State Medical University (Sechenov University), Moscow, 119991 Russia
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7
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Shimamoto A. Social Defeat Stress, Sex, and Addiction-Like Behaviors. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2018; 140:271-313. [PMID: 30193707 DOI: 10.1016/bs.irn.2018.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Social confrontation is a form of social interaction in animals where two conspecific individuals confront each other in dispute over territory, during the formation of hierarchies, and during breeding seasons. Typically, a social confrontation involves a prevailing individual and a yielding individual. The prevailing individual often exhibits aggressive postures and launches attacks, whereas the yielding individual often adopts postures of defeat. The yielding or defeated animals experience a phenomenon known as social defeat stress, in which they show exaggerated stress as well as autonomic and endocrine responses that cause impairment of both the brain and body. In laboratory settings, one can reliably generate social defeat stress by allowing a naïve (or already defeated) animal to intrude into a home cage in which its resident has already established a territory or is nursing. This resident-intruder paradigm has been widely used in both males and females to study mechanisms in the brain that underlie the stress responses. Stress has profound effects on drug reward for cocaine, methamphetamine, alcohol, and opioids. Particularly, previous experiences with social defeat can exaggerate subsequent addiction-like behaviors. The extent of these addiction-like behaviors depends on the intensity, duration, frequency, and intermittency of the confrontation episodes. This chapter describes four types of social defeat stress: acute, repeated, intermittent, and chronic. Specifically, it focuses on social defeat stress models used in laboratories to study individual, sex, and animal strain differences in addiction-like behaviors.
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Affiliation(s)
- Akiko Shimamoto
- Department of Biochemistry, Cancer Biology, Neuroscience, and Pharmacology, Meharry Medical College, Nashville, TN, United States.
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8
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Borrow AP, Bales NJ, Stover SA, Handa RJ. Chronic Variable Stress Induces Sex-Specific Alterations in Social Behavior and Neuropeptide Expression in the Mouse. Endocrinology 2018; 159:2803-2814. [PMID: 29788320 PMCID: PMC6692887 DOI: 10.1210/en.2018-00217] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/10/2018] [Indexed: 12/11/2022]
Abstract
Chronic exposure to stressors impairs the function of multiple organ systems and has been implicated in increased disease risk. In the rodent, the chronic variable stress (CVS) paradigm has successfully modeled several stress-related illnesses. Despite striking disparities between men and women in the prevalence and etiology of disorders associated with chronic stress, most preclinical research examining chronic stressor exposure has focused on male subjects. One potential mediator of the consequences of CVS is oxytocin (OT), a known regulator of stress neurocircuitry and behavior. To ascertain the sex-specific effects of CVS in the C57BL/6 mouse on OT and the structurally similar neuropeptide arginine vasopressin (AVP), the numbers of immunoreactive and mRNA-containing neurons in the paraventricular nucleus (PVN) and supraoptic nucleus (SON) were determined using immunohistochemistry and in situ hybridization, respectively. In addition, the mice underwent a battery of behavioral tests to determine whether CVS affects social behaviors known to be regulated by OT and AVP. Six weeks of CVS increased sociability in the female mouse and decreased PVN OT immunoreactivity (ir) and AVP mRNA. In the male mice, CVS decreased PVN OT mRNA but had no effect on social behavior, AVP, or OT-ir. CVS also increased the soma volume for PVN OT neurons. In contrast, OT and AVP neurons in the SON were unaffected by CVS treatment. These findings demonstrate clear sex differences in the effects of CVS on neuropeptides in the mouse, suggest a pathway through which CVS alters sociability and stress-coping responses in females and reveals a vulnerability to CVS in the C57BL/6 mouse strain.
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Affiliation(s)
- Amanda P Borrow
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Natalie J Bales
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Sally A Stover
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Robert J Handa
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
- Correspondence: Robert J. Handa, PhD, Department of Biomedical Sciences, Colorado State University, 1617 Campus Delivery, Fort Collins, Colorado 80523. E-mail:
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Wang B, Katsube T, Begum N, Nenoi M. Revisiting the health effects of psychological stress-its influence on susceptibility to ionizing radiation: a mini-review. JOURNAL OF RADIATION RESEARCH 2016; 57:325-35. [PMID: 27242342 PMCID: PMC4973650 DOI: 10.1093/jrr/rrw035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 02/02/2016] [Accepted: 02/25/2016] [Indexed: 05/03/2023]
Abstract
Both psychological stress (PS) and ionizing radiation (IR) cause varied detrimental effects on humans. There has been no direct evidence so far showing PS alone could cause cancer; however, long-lasting PS may affect our overall health and ability to cope with cancer. Due to their living conditions and occupations, some people may encounter concurrent exposure to both PS and IR to a high extent. In addition to possible health effects resulting directly from exposure to IR on these people, fear of IR exposure is also a cause of PS. The question of whether PS would influence susceptibility to IR, radiocarcinogenesis in particular, is of great concern by both the academic world and the public. Recently, investigations using animal PS models demonstrated that PS could modulate susceptibility to IR, causing increased susceptibility to radiocarcinogenesis in Trp53-heterozygous mice, hematological toxicity in peripheral blood and elevated chromosome aberration (dicentrics) frequency in splenocytes of Trp53-wild-type mice. To actively reduce health risk from exposure to IR, further studies are needed to cumulate more evidence and provide insights into the mechanisms underlying the alterations in susceptibility due to PS modulation. This mini-review gives a general overview of the significance of PS effects on humans and experimental animals, with a special focus on summarizing the latest weight-of-evidence approaches to radiobiological studies on PS-induced alterations in susceptibility in experimental animal models. The susceptibility being investigated is mainly in the context of the impact of the modulatory effect of PS on radiocarcinogenesis; we seek to improve understanding of the combined effects of exposure to both PS and IR in order to facilitate, via active intervention, strategies for radiation risk reduction.
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Affiliation(s)
- Bing Wang
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Takanori Katsube
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Nasrin Begum
- Center for Nuclear Medicine and Ultrasound, Rajshahi Medical College Hospital Campus, G.P.O. Box No. 35, Rajshahi, Bangladesh
| | - Mitsuru Nenoi
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
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Aloba O, Olabisi O, Aloba T. The 10-Item Connor-Davidson Resilience Scale: Factorial Structure, Reliability, Validity, and Correlates Among Student Nurses in Southwestern Nigeria. J Am Psychiatr Nurses Assoc 2016; 22:43-51. [PMID: 26929231 DOI: 10.1177/1078390316629971] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The 10-item Connor-Davidson Resilience Scale (CD-RISC) has demonstrated satisfactory psychometric properties as a measure of resilience in all the previous studies conducted in developed countries. OBJECTIVE The objective of this study was to explore the psychometric characteristics of the 10-item CD-RISC among students nurses in southwestern Nigeria. DESIGN This descriptive cross-sectional study involved a total of 449 student nurses who completed the 10-item CD-RISC in addition to measures of self-esteem, depression, religiosity, and psychological distress. RESULTS The scale demonstrated adequate reliability (Cronbach's α = .81) and satisfactory validity with significant correlations with the measures of self-esteem, depression, religiosity, and psychological distress. Factor analyses revealed that resilience was best explained by a two-factor construct. CONCLUSIONS The scale is a valid measure of resilience among Nigerian student nurses.
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Affiliation(s)
- Olutayo Aloba
- Olutayo Aloba, FWACPsych, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
| | - Oluseyi Olabisi
- Oluseyi Olabisi, BNSc, Federal School of Nursing Sciences, Saki, Oyo State, Nigeria
| | - Tolulope Aloba
- Tolulope Aloba, BNSc, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
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11
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Wang B, Tanaka K, Katsube T, Ninomiya Y, Vares G, Liu Q, Morita A, Nakajima T, Nenoi M. Chronic restraint-induced stress has little modifying effect on radiation hematopoietic toxicity in mice. JOURNAL OF RADIATION RESEARCH 2015; 56:760-7. [PMID: 26045492 PMCID: PMC4576999 DOI: 10.1093/jrr/rrv030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 05/01/2015] [Indexed: 05/16/2023]
Abstract
Both radiation and stresses cause detrimental effects on humans. Besides possible health effects resulting directly from radiation exposure, the nuclear plant accident is a cause of social psychological stresses. A recent study showed that chronic restraint-induced stresses (CRIS) attenuated Trp53 functions and increased carcinogenesis susceptibility of Trp53-heterozygous mice to total-body X-irradiation (TBXI), having a big impact on the academic world and a sensational effect on the public, especially the residents living in radioactively contaminated areas. It is important to investigate the possible modification effects from CRIS on radiation-induced health consequences in Trp53 wild-type (Trp53wt) animals. Prior to a carcinogenesis study, effects of TBXI on the hematopoietic system under CRIS were investigated in terms of hematological abnormality in the peripheral blood and residual damage in the bone marrow erythrocytes using a mouse restraint model. Five-week-old male Trp53wt C57BL/6J mice were restrained 6 h per day for 28 consecutive days, and TBXI (4 Gy) was given on the 8th day. Results showed that CRIS alone induced a marked decrease in the red blood cell (RBC) and the white blood cell (WBC) count, while TBXI caused significantly lower counts of RBCs, WBCs and blood platelets, and a lower concentration of hemoglobin regardless of CRIS. CRIS alone did not show any significant effect on erythrocyte proliferation and on induction of micronucleated erythrocytes, whereas TBXI markedly inhibited erythrocyte proliferation and induced a significant increase in the incidences of micronucleated erythrocytes, regardless of CRIS. These findings suggest that CRIS does not have a significant impact on radiation-induced detrimental effects on the hematopoietic system in Trp53wt mice.
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Affiliation(s)
- Bing Wang
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Kaoru Tanaka
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Takanori Katsube
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Yasuharu Ninomiya
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Guillaume Vares
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Qiang Liu
- Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, PR China
| | - Akinori Morita
- Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8509, Japan
| | - Tetsuo Nakajima
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
| | - Mitsuru Nenoi
- Research Center for Radiation Protection, National Institute of Radiological Sciences, Chiba 263-8555, Japan
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12
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Dale SK, Weber KM, Cohen MH, Kelso GA, Cruise RC, Brody LR. Resilience Moderates the Association Between Childhood Sexual Abuse and Depressive Symptoms Among Women with and At-Risk for HIV. AIDS Behav 2015; 19:1379-87. [PMID: 25085079 DOI: 10.1007/s10461-014-0855-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Childhood sexual abuse (CSA) places women at risk for HIV infection and once infected, for poor mental health outcomes, including lower quality of life and depressive symptoms. Among HIV-positive and demographically matched HIV-negative women, we investigated whether resilience and HIV status moderated the relationships between CSA and health indices as well as the relationships among CSA, depressive symptoms, and health-related quality of life (HRQOL). Participants included 202 women (138 HIV+, 64 HIV-, 87 % African American) from the Women's Interagency HIV Study Chicago CORE Center site. Results indicated that in both HIV-positive and HIV-negative women, higher resilience significantly related to lower depressive symptoms and higher HRQOL. CSA related to higher depressive symptoms only for women scoring low in resilience. Interventions to promote resilience, especially in women with a CSA history, might minimize depressive symptoms and poor HRQOL among HIV-positive and HIV-negative women.
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Affiliation(s)
- Sannisha K Dale
- Department of Psychology, Boston University, 648 Beacon Street, Boston, MA, 02215, USA,
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Andrews PW, Bharwani A, Lee KR, Fox M, Thomson JA. Is serotonin an upper or a downer? The evolution of the serotonergic system and its role in depression and the antidepressant response. Neurosci Biobehav Rev 2015; 51:164-88. [DOI: 10.1016/j.neubiorev.2015.01.018] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 01/08/2015] [Accepted: 01/15/2015] [Indexed: 12/17/2022]
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Seibenhener ML, Wooten MC. Use of the Open Field Maze to measure locomotor and anxiety-like behavior in mice. J Vis Exp 2015:e52434. [PMID: 25742564 DOI: 10.3791/52434] [Citation(s) in RCA: 587] [Impact Index Per Article: 65.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Animal models have proven to be invaluable to researchers trying to answer questions regarding the mechanisms of behavior. The Open Field Maze is one of the most commonly used platforms to measure behaviors in animal models. It is a fast and relatively easy test that provides a variety of behavioral information ranging from general ambulatory ability to data regarding the emotionality of the subject animal. As it relates to rodent models, the procedure allows the study of different strains of mice or rats both laboratory bred and wild-captured. The technique also readily lends itself to the investigation of different pharmacological compounds for anxiolytic or anxiogenic effects. Here, a protocol for use of the open field maze to describe mouse behaviors is detailed and a simple analysis of general locomotor ability and anxiety-related emotional behaviors between two strains of C57BL/6 mice is performed. Briefly, using the described protocol we show Wild Type mice exhibited significantly less anxiety related behaviors than did age-matched Knock Out mice while both strains exhibited similar ambulatory ability.
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Litteljohn D, Nelson E, Hayley S. IFN-γ differentially modulates memory-related processes under basal and chronic stressor conditions. Front Cell Neurosci 2014; 8:391. [PMID: 25477784 PMCID: PMC4238410 DOI: 10.3389/fncel.2014.00391] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/03/2014] [Indexed: 02/06/2023] Open
Abstract
Cytokines are inflammatory messengers that orchestrate the brain’s response to immunological challenges, as well as possibly even toxic and psychological insults. We previously reported that genetic ablation of the pro-inflammatory cytokine, interferon-gamma (IFN-γ), attenuated some of the corticosteroid, cytokine, and limbic dopaminergic variations induced by 6 weeks of exposure to an unpredictable psychologically relevant stressor. Presently, we sought to determine whether a lack of IFN-γ would likewise modify the impact of chronic stress on hippocampus-dependent memory function and related neurotransmitter and neurotrophin signaling systems. As predicted, chronic stress impaired spatial recognition memory (Y-maze task) in the wild-type animals. In contrast, though the IFN-γ knockouts (KOs) showed memory disturbances in the basal state, under conditions of chronic stress these mice actually exhibited facilitated memory performance. Paralleling these findings, while overall the KOs displayed altered noradrenergic and/or serotonergic activity in the hippocampus and locus coeruleus, norepinephrine utilization in both of these memory-related brain regions was selectively increased among the chronically stressed KOs. However, contrary to our expectations, neither IFN-γ deletion nor chronic stressor exposure significantly affected nucleus accumbens dopaminergic neurotransmission or hippocampal brain-derived neurotrophic factor protein expression. These findings add to a growing body of evidence implicating cytokines in the often differential regulation of neurobehavioral processes in health and disease. Whereas in the basal state IFN-γ appears to be involved in sustaining memory function and the activity of related brain monoamine systems, in the face of ongoing psychologically relevant stress the cytokine may, in fact, act to restrict potentially adaptive central noradrenergic and spatial memory responses.
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Affiliation(s)
- Darcy Litteljohn
- Department of Neuroscience, Carleton University Ottawa, ON, Canada
| | - Eric Nelson
- Faculty of Medicine, University of Toronto Toronto, ON, Canada
| | - Shawn Hayley
- Department of Neuroscience, Carleton University Ottawa, ON, Canada
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Favreau-Peigné A, Calandreau L, Constantin P, Gaultier B, Bertin A, Arnould C, Laurence A, Richard-Yris MA, Houdelier C, Lumineau S, Boissy A, Leterrier C. Emotionality modulates the effect of chronic stress on feeding behaviour in birds. PLoS One 2014; 9:e87249. [PMID: 24498302 PMCID: PMC3911932 DOI: 10.1371/journal.pone.0087249] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 12/20/2013] [Indexed: 11/19/2022] Open
Abstract
Chronic stress is a long-lasting negative emotional state that induces negative consequences on animals' psycho-physiological state. This study aimed at assessing whether unpredictable and repeated negative stimuli (URNS) influence feeding behaviour in quail. Sixty-four quail were exposed to URNS from day 17 to 40, while 64 quail were undisturbed. Two lines divergently selected on their inherent emotionality were used to assess the effect of genetic factors on the sensitivity to URNS. All quail were submitted to a sequential feeding procedure (using two diets of different energetic values) which placed them in a contrasting situation. Behavioural tests were performed to assess the emotional reactivity of the two lines. Results confirmed that differences exist between them and that their emotional reactivity was enhanced by URNS. Diet preferences, motivation and daily intake were also measured. URNS did not change the preferences for the hypercaloric diet compared to the hypocaloric diet in choice tests, but they reduced daily intakes in both lines. Motivations for each diet were differently affected by URNS: they decreased the motivation to eat the hypercaloric diet in quail selected for their low inherent fearfulness whereas they increased the motivation to eat the hypocaloric diet in quail selected for their high inherent fearfulness, which suggested a devaluation process in the former and a compensatory behaviour in the later. Growth was furthermore reduced and laying delayed by URNS in both lines. In conclusion, the exposure to URNS induced interesting changes in feeding behaviour added with an increase in emotional reactivity and an alteration of production parameters. This confirms that both lines of quail experienced a chronic stress state. However differences in feed motivation and emotional reactivity between lines under chronic stress suggested that they experienced different emotional state and use different ways to cope with it depending on their genetic background.
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Affiliation(s)
- Angélique Favreau-Peigné
- UMR 791 Modélisation Systémique Appliquée aux Ruminants, AgroParisTech, Paris, France
- UMR 791 Modélisation Systémique Appliquée aux Ruminants, INRA, Paris, France
| | - Ludovic Calandreau
- UMR 85 Physiologie de la Reproduction et des Comportements, INRA, Nouzilly, France
- UMR 6175, CNRS, Nouzilly, France
- Université de Tours, Tours, France
- IFCE, Nouzilly, France
| | - Paul Constantin
- UMR 85 Physiologie de la Reproduction et des Comportements, INRA, Nouzilly, France
- UMR 6175, CNRS, Nouzilly, France
- Université de Tours, Tours, France
- IFCE, Nouzilly, France
| | - Bernard Gaultier
- UE 1295 Pôle d’Expérimentation Avicole de Tours, INRA, Nouzilly, France
| | - Aline Bertin
- UMR 85 Physiologie de la Reproduction et des Comportements, INRA, Nouzilly, France
- UMR 6175, CNRS, Nouzilly, France
- Université de Tours, Tours, France
- IFCE, Nouzilly, France
| | - Cécile Arnould
- UMR 85 Physiologie de la Reproduction et des Comportements, INRA, Nouzilly, France
- UMR 6175, CNRS, Nouzilly, France
- Université de Tours, Tours, France
- IFCE, Nouzilly, France
| | - Agathe Laurence
- Ethos UMR 6552, Université de Rennes 1, CNRS, Rennes, France
| | | | | | - Sophie Lumineau
- Ethos UMR 6552, Université de Rennes 1, CNRS, Rennes, France
| | - Alain Boissy
- UMR 1213 Herbivores, INRA, St-Genès Champanelle, France
| | - Christine Leterrier
- UMR 85 Physiologie de la Reproduction et des Comportements, INRA, Nouzilly, France
- UMR 6175, CNRS, Nouzilly, France
- Université de Tours, Tours, France
- IFCE, Nouzilly, France
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Sex-dependent effects of maternal separation on plasma corticosterone and brain monoamines in response to chronic ethanol administration. Neuroscience 2013; 253:55-66. [DOI: 10.1016/j.neuroscience.2013.08.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 07/22/2013] [Accepted: 08/20/2013] [Indexed: 01/16/2023]
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Gerecke KM, Kolobova A, Allen S, Fawer JL. Exercise protects against chronic restraint stress-induced oxidative stress in the cortex and hippocampus. Brain Res 2013; 1509:66-78. [DOI: 10.1016/j.brainres.2013.02.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 01/12/2013] [Accepted: 02/15/2013] [Indexed: 02/08/2023]
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Social agonistic distress in male and female mice: changes of behavior and brain monoamine functioning in relation to acute and chronic challenges. PLoS One 2013; 8:e60133. [PMID: 23565195 PMCID: PMC3614949 DOI: 10.1371/journal.pone.0060133] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Accepted: 02/21/2013] [Indexed: 11/19/2022] Open
Abstract
Stressful events promote several neuroendocrine and neurotransmitter changes that might contribute to the provocation of psychological and physical pathologies. Perhaps, because of its apparent ecological validity and its simple application, there has been increasing use of social defeat (resident-intruder) paradigms as a stressor. The frequency of stress-related psychopathology is much greater in females than in males, but the typical resident-intruder paradigm is less useful in assessing stressor effects in females. An alternative, but infrequently used procedure in females involves exposing a mouse to a lactating dam, resulting in threatening gestures being expressed by the resident. In the present investigation we demonstrated the utility of this paradigm, showing that the standard resident-intruder paradigm in males and the modified version in females promoted elevated anxiety in a plus-maze test. The behavioral effects that reflected anxiety were more pronounced 2 weeks after the stressor treatment than they were 2 hr afterward, possibly reflecting the abatement of the stress-related of hyper-arousal. These treatments, like a stressor comprising physical restraint, increased plasma corticosterone and elicited variations of norepinephrine and serotonin levels and turnover within the prefrontal cortex, hippocampus and central amygdala. Moreover, the stressor effects were exaggerated among mice that had been exposed to a chronic or subchronic-intermittent regimen of unpredictable stressors. Indeed, some of the monoamine changes were more pronounced in females than in males, although it is less certain whether this represented compensatory changes to deal with chronic stressors that could result in excessive strain on biological systems (allostatic overload).
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Hill MN, Hellemans KGC, Verma P, Gorzalka BB, Weinberg J. Neurobiology of chronic mild stress: parallels to major depression. Neurosci Biobehav Rev 2012; 36:2085-117. [PMID: 22776763 PMCID: PMC4821201 DOI: 10.1016/j.neubiorev.2012.07.001] [Citation(s) in RCA: 304] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 06/21/2012] [Accepted: 07/01/2012] [Indexed: 01/28/2023]
Abstract
The chronic mild (or unpredictable/variable) stress (CMS) model was developed as an animal model of depression more than 20 years ago. The foundation of this model was that following long-term exposure to a series of mild, but unpredictable stressors, animals would develop a state of impaired reward salience that was akin to the anhedonia observed in major depressive disorder. In the time since its inception, this model has also been used for a variety of studies examining neurobiological variables that are associated with depression, despite the fact that this model has never been critically examined to validate that the neurobiological changes induced by CMS are parallel to those documented in depressive disorder. The aim of the current review is to summarize the current state of knowledge regarding the effects of chronic mild stress on neurobiological variables, such as neurochemistry, neurochemical receptor expression and functionality, neurotrophin expression and cellular plasticity. These findings are then compared to those of clinical research examining common variables in populations with depressive disorders to determine if the changes observed following chronic mild stress are in fact consistent with those observed in major depression. We conclude that the chronic mild stress paradigm: (1) evokes an array of neurobiological changes that mirror those seen in depressive disorders and (2) may be a suitable tool to investigate novel systems that could be disturbed in depression, and thus aid in the development of novel targets for the treatment of depression.
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Affiliation(s)
- Matthew N Hill
- Departments of Cell Biology and Anatomy, Hotchkiss Brain Institute, University of Calgary, Calgary, AB Canada.
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21
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Dissecting anxiety-related QTLs in mice by univariate and multivariate mapping. CHINESE SCIENCE BULLETIN-CHINESE 2012. [DOI: 10.1007/s11434-012-5240-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Watanabe I, Li GY, Imamura Y, Nabeta H, Kunitake Y, Ishii H, Haraguchi M, Furukawa Y, Tateishi H, Kojima N, Nizoguchi Y, Yamada S. Baseline saliva level of 3-methoxy-4-hydroxyphenylglycole (MHPG) associates with a consequent cognitive decline in non-demented elderly subjects: three-years follow-up study. Psychiatry Res 2012; 195:125-8. [PMID: 21802746 DOI: 10.1016/j.psychres.2011.07.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 01/18/2011] [Accepted: 07/06/2011] [Indexed: 11/27/2022]
Abstract
The aim of the study was to explore the relation between saliva level of 3-methoxy-4-hydroxy-phenylglycol (MHPG) and a later cognitive decline in non-demented elderly subjects. We have reported that sMHPG in 214 elderly subjects living in the community (age 74.5±5.9years) was associated with scores on the Mini-Mental State Examination (MMSE) and the Frontal Assessment Battery (FAB) in 2004 to 2006 (Time A). The same cohort underwent these cognitive tests again from 2007 to 2009 (Time B). The cognitive function of the 147 of 214 subjects could be reassessed by the same cognitive tests. The score on the FAB, but not the MMSE, was significantly reduced at Time B (14.6±2.6) compared with that of Time A (15.2±1.9). There was a significant negative correlation between the baseline sMHPG and the changes in the FAB score subtracted from Time B to Time A or the scores on the FAB at Time B in men, but not at Time A. These correlations were not found in women. These data indicate that high sMHPG might be associated with subsequent cognitive decline assessed by the FAB in non-demented elderly men living in the community.
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Becker HC, Lopez MF, Doremus-Fitzwater TL. Effects of stress on alcohol drinking: a review of animal studies. Psychopharmacology (Berl) 2011; 218:131-56. [PMID: 21850445 PMCID: PMC3247761 DOI: 10.1007/s00213-011-2443-9] [Citation(s) in RCA: 163] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 08/02/2011] [Indexed: 11/26/2022]
Abstract
RATIONALE While stress is often proposed to play a significant role in influencing alcohol consumption, the relationship between stress and alcohol is complex and poorly understood. Over several decades, stress effects on alcohol drinking have been studied using a variety of animal models and experimental procedures, yet this large body of literature has generally produced equivocal results. OBJECTIVES This paper reviews results from animal studies in which alcohol consumption is evaluated under conditions of acute/sub-chronic stress exposure or models of chronic stress exposure. Evidence also is presented indicating that chronic intermittent alcohol exposure serves as a stressor that consequently influences drinking. RESULTS The effects of various acute/sub-chronic stress procedures on alcohol consumption have generally been mixed, but most study outcomes suggest either no effect or decreased alcohol consumption. In contrast, most studies indicate that chronic stress, especially when administered early in development, results in elevated drinking later in adulthood. Chronic alcohol exposure constitutes a potent stressor itself, and models of chronic intermittent alcohol exposure reliably produce escalation of voluntary alcohol consumption. CONCLUSIONS A complex and dynamic interplay among a wide array of genetic, biological, and environmental factors govern stress responses, regulation of alcohol drinking, and the circumstances in which stress modulates alcohol consumption. Suggestions for future directions and new approaches are presented that may aid in developing more sensitive and valid animal models that not only better mimic the clinical situation, but also provide greater understanding of mechanisms that underlie the complexity of stress effects on alcohol drinking.
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Affiliation(s)
- Howard C Becker
- Department of Psychiatry and Behavioral Sciences, Charleston Alcohol Research Center, Center for Drug and Alcohol Programs, 67 President Street, MSC 861, Charleston, SC 29425, USA.
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Delgado-Morales R, del Río E, Gómez-Román A, Bisagno V, Nadal R, de Felipe C, Armario A. Adrenocortical and behavioural response to chronic restraint stress in neurokinin-1 receptor knockout mice. Physiol Behav 2011; 105:669-75. [PMID: 22019828 DOI: 10.1016/j.physbeh.2011.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 10/05/2011] [Accepted: 10/07/2011] [Indexed: 11/15/2022]
Abstract
Brain substance P and its receptor (neurokinin-1, NK1) have a widespread brain distribution and are involved in an important number of behavioural and physiological responses to emotional stimuli. However, the role of NK1 receptors in the consequences of exposure to chronic stress has not been explored. The present study focused on the role of these receptors in the hypothalamic-pituitary-adrenal (HPA) response to daily repeated restraint stress (evaluated by plasma corticosterone levels), as well as on the effect of this procedure on anxiety-like behaviour, spatial learning and memory in the Morris water maze (MWM), a hippocampus-dependent task. Adult null mutant NK1-/- mice, with a C57BL/6J background, and the corresponding wild-type mice showed similar resting corticosterone levels and, also, did not differ in corticosterone response to a first restraint. Nevertheless, adaptation to the repeated stressor was faster in NK1-/- mice. Chronic restraint modestly increased anxiety-like behaviour in the light-dark test, irrespective of genotype. Throughout the days of the MWM trials, NK1-/- mice showed a similar learning rate to that of wild-type mice, but had lower levels of thigmotaxis and showed a better retention in the probe trial. Chronic restraint stress did not affect these variables in either genotype. These results indicate that deletion of the NK1 receptor does not alter behavioural susceptibility to chronic repeated stress in mice, but accelerates adaptation of the HPA axis. In addition, deletion may result in lower levels of thigmotaxis and improved short-term spatial memory, perhaps reflecting a better learning strategy in the MWM.
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Sartori SB, Landgraf R, Singewald N. The clinical implications of mouse models of enhanced anxiety. FUTURE NEUROLOGY 2011; 6:531-571. [PMID: 21901080 PMCID: PMC3166843 DOI: 10.2217/fnl.11.34] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Mice are increasingly overtaking the rat model organism in important aspects of anxiety research, including drug development. However, translating the results obtained in mouse studies into information that can be applied in clinics remains challenging. One reason may be that most of the studies so far have used animals displaying 'normal' anxiety rather than 'psychopathological' animal models with abnormal (elevated) anxiety, which more closely reflect core features and sensitivities to therapeutic interventions of human anxiety disorders, and which would, thus, narrow the translational gap. Here, we discuss manipulations aimed at persistently enhancing anxiety-related behavior in the laboratory mouse using phenotypic selection, genetic techniques and/or environmental manipulations. It is hoped that such models with enhanced construct validity will provide improved ways of studying the neurobiology and treatment of pathological anxiety. Examples of findings from mouse models of enhanced anxiety-related behavior will be discussed, as well as their relation to findings in anxiety disorder patients regarding neuroanatomy, neurobiology, genetic involvement and epigenetic modifications. Finally, we highlight novel targets for potential anxiolytic pharmacotherapeutics that have been established with the help of research involving mice. Since the use of psychopathological mouse models is only just beginning to increase, it is still unclear as to the extent to which such approaches will enhance the success rate of drug development in translating identified therapeutic targets into clinical trials and, thus, helping to introduce the next anxiolytic class of drugs.
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Affiliation(s)
- Simone B Sartori
- Department of Pharmacology & Toxicology, Institute of Pharmacy & Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Peter-Mayr-Street 1, A-6020, Innsbruck, Austria
| | - Rainer Landgraf
- Max Planck Institute of Psychiatry, Department of Behavioral Neuroendocrinology, Munich, Germany
| | - Nicolas Singewald
- Department of Pharmacology & Toxicology, Institute of Pharmacy & Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Peter-Mayr-Street 1, A-6020, Innsbruck, Austria
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Miller BH, Schultz LE, Gulati A, Su AI, Pletcher MT. Phenotypic characterization of a genetically diverse panel of mice for behavioral despair and anxiety. PLoS One 2010; 5:e14458. [PMID: 21206921 PMCID: PMC3012073 DOI: 10.1371/journal.pone.0014458] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Accepted: 12/07/2010] [Indexed: 02/04/2023] Open
Abstract
Background Animal models of human behavioral endophenotypes, such as the Tail Suspension Test (TST) and the Open Field assay (OF), have proven to be essential tools in revealing the genetics and mechanisms of psychiatric diseases. As in the human disorders they model, the measurements generated in these behavioral assays are significantly impacted by the genetic background of the animals tested. In order to better understand the strain-dependent phenotypic variability endemic to this type of work, and better inform future studies that rely on the data generated by these models, we phenotyped 33 inbred mouse strains for immobility in the TST, a mouse model of behavioral despair, and for activity in the OF, a model of general anxiety and locomotor activity. Results We identified significant strain-dependent differences in TST immobility, and in thigmotaxis and distance traveled in the OF. These results were replicable over multiple testing sessions and exhibited high heritability. We exploited the heritability of these behavioral traits by using in silico haplotype-based association mapping to identify candidate genes for regulating TST behavior. Two significant loci (-logp >7.0, gFWER adjusted p value <0.05) of approximately 300 kb each on MMU9 and MMU10 were identified. The MMU10 locus is syntenic to a major human depressive disorder QTL on human chromosome 12 and contains several genes that are expressed in brain regions associated with behavioral despair. Conclusions We report the results of phenotyping a large panel of inbred mouse strains for depression and anxiety-associated behaviors. These results show significant, heritable strain-specific differences in behavior, and should prove to be a valuable resource for the behavioral and genetics communities. Additionally, we used haplotype mapping to identify several loci that may contain genes that regulate behavioral despair.
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Affiliation(s)
- Brooke H. Miller
- Department of Neuroscience, The Scripps Research Institute-Scripps Florida, Jupiter, Florida, United States of America
| | - Laura E. Schultz
- Department of Molecular Therapeutics, The Scripps Research Institute-Scripps Florida, Jupiter, Florida, United States of America
| | - Anisha Gulati
- Department of Molecular Therapeutics, The Scripps Research Institute-Scripps Florida, Jupiter, Florida, United States of America
| | - Andrew I. Su
- Genomic Institute of the Novartis Research Foundation, San Diego, California, United States of America
| | - Mathew T. Pletcher
- Department of Molecular Therapeutics, The Scripps Research Institute-Scripps Florida, Jupiter, Florida, United States of America
- * E-mail:
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Razzoli M, Carboni L, Andreoli M, Ballottari A, Arban R. Different susceptibility to social defeat stress of BalbC and C57BL6/J mice. Behav Brain Res 2010; 216:100-8. [PMID: 20654656 DOI: 10.1016/j.bbr.2010.07.014] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 07/13/2010] [Accepted: 07/14/2010] [Indexed: 11/16/2022]
Abstract
Social stress may precipitate psychopathological disorders in susceptible individuals. The present experiments were focused on the biology beyond the differential susceptibility to social stress. Social defeat, an ethologically relevant stressor known to elicit different coping strategies, was used in two mouse strains differing for baseline emotionality, such as C57BL6/J and BalbC. In separate experiments, in both strains a single social defeat decreased home-cage activity without altering social aversion; it diminished body weight only in defeated BalbC mice. In longitudinal experiments, mice experienced repeated social defeats that induced multiple long-term consequences. Defeated C57BL6/J increased their body weight and food intake; defeated BalbC mice diminished their metabolic efficiency. Only defeated BalbC subjects exhibited increased social avoidance levels; no differences from controls were seen on forced swim test response in defeated mice of either strain. No long-term effects of social defeat were detected in peripheral biomarkers of stress, metabolic, and immune responses, although the analysis of selected internal organs revealed decreases in abdominal fat and gonadal organs in all defeated subjects. These results demonstrated a strain-distinctive profile in the susceptibility to social defeat stress, either acutely or chronically, with metabolic consequences more consistently found in C57BL6/J while social aversion induced predominantly in BalbC subjects.
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Affiliation(s)
- Maria Razzoli
- Neurosciences CEDD, GlaxoSmithKline Medicine Research Centre, via Alessandro Fleming 4, 37135 Verona, Italy.
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Cheng HW, Fahey A. Effects of group size and repeated social disruption on the serotonergic and dopaminergic systems in two genetic lines of White Leghorn laying hens. Poult Sci 2009; 88:2018-25. [DOI: 10.3382/ps.2008-00302] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Demographic and childhood environmental predictors of resilience in a community sample. J Psychiatr Res 2009; 43:1007-12. [PMID: 19264325 DOI: 10.1016/j.jpsychires.2009.01.013] [Citation(s) in RCA: 243] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Revised: 01/26/2009] [Accepted: 01/30/2009] [Indexed: 01/15/2023]
Abstract
Scientific investigation of resilient responses to stress and trauma has the potential to inform models of the etiology, treatment, and prevention of stress-related psychiatric disorders (e.g. posttraumatic stress disorder). Despite building interest in and investigation of resilience, many basic questions regarding this construct remain unstudied. This study contributes to the empirical literature on resilience by providing novel information on the distribution and correlates of stress resilience in the general community. A well-validated self-report measure of resilience was completed by a large sample (N=764) of respondents to a telephone-based community survey that also included questions about demographics and history of childhood maltreatment. Multiple regression analyses showed that several demographic characteristics (sex, education level, and income level) uniquely predicted subjects' resilience to stress and that, taken together, these factors explained approximately 11% of the variance in resilience. Reported history of childhood maltreatment independently contributed to prediction of resilience and explained an additional 2% of the variance in this trait. While females, individuals with lower levels of education and income, and individuals with histories of childhood maltreatment reported diminished resilience overall, the majority of variance in the resilience measure was left unexplained leaving much room for other variables to influence a person's resilience to stress. Relationships of the present results to other research on resilient and pathological stress responses are discussed, as well as implications of these findings for future investigations of resilience.
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Genetic relationship between anxiety-related and fear-related behaviors in BXD recombinant inbred mice. Behav Pharmacol 2009; 20:204-9. [PMID: 18830130 DOI: 10.1097/fbp.0b013e32830c368c] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Mood and anxiety disorders, and rodent phenotypic measures modeling these disorders, have a strong genetic component. Various assays are used to study the neurobiological basis of fear-related and anxiety-related behaviors, phenotype genetically modified mice, and elucidate pharmacological modulation of these behaviors for medication development. Earlier work, however, suggests that different trait measures are mediated by partly overlapping but ultimately distinct genetic factors. In this study, we assessed a novel panel of 23 C57BL/6JxDBA/2J (BXD) recombinant inbred strains on various trait measures of Pavlovian fear conditioning and anxiety-like behavior (novel open field, elevated plus-maze), as well as sensory (acoustic startle, prepulse inhibition of startle) and motor (baseline coordination and learning on accelerating rotarod) function. Results showed that traits were continuously distributed across strains and had modest to strong R values. Principal components analysis resolved the data into five factors: factor 1 loaded fear-related traits, factor 2 loaded elevated plus-maze measures as well as context fear, factor 3 loaded novel open field measures and plus-maze closed arm entries, factor 4 loaded rotarod motor function, and factor 5 loaded acoustic startle and prepulse inhibition. These data add to evidence that murine measures of fear-like and anxiety-like traits reflect distinct constructs mediated by dissociable gene variants.
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Corticosterone facilitates extinction of fear memory in BALB/c mice but strengthens cue related fear in C57BL/6 mice. Exp Neurol 2009; 216:375-82. [DOI: 10.1016/j.expneurol.2008.12.011] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 12/13/2008] [Accepted: 12/17/2008] [Indexed: 11/17/2022]
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Mutlu O, Ulak G, Laugeray A, Belzung C. Effects of neuronal and inducible NOS inhibitor 1-[2-(trifluoromethyl) phenyl] imidazole (TRIM) in unpredictable chronic mild stress procedure in mice. Pharmacol Biochem Behav 2009; 92:82-7. [DOI: 10.1016/j.pbb.2008.10.013] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Revised: 10/09/2008] [Accepted: 10/21/2008] [Indexed: 10/21/2022]
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Anisman H, Merali Z, Stead JDH. Experiential and genetic contributions to depressive- and anxiety-like disorders: clinical and experimental studies. Neurosci Biobehav Rev 2008; 32:1185-206. [PMID: 18423590 DOI: 10.1016/j.neubiorev.2008.03.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Revised: 12/31/2007] [Accepted: 02/23/2008] [Indexed: 10/22/2022]
Abstract
Stressful events have been implicated in the precipitation of depression and anxiety. These disorders may evolve owing to one or more of an array of neuronal changes that occur in several brain regions. It seems likely that these stressor-provoked neurochemical alterations are moderated by genetic determinants, as well as by a constellation of experiential and environmental factors. Indeed, animal studies have shown that vulnerability to depressive-like behaviors involve mechanisms similar to those associated with human depression (e.g., altered serotonin, corticotropin releasing hormone and their receptors, growth factors), and that the effects of stressors are influenced by previous stressor experiences, particularly those encountered early in life. These stressor effects might reflect sensitization of neuronal functioning, phenotypic changes of processes that lead to neurochemical release or receptor sensitivity, or epigenetic processes that modify expression of specific genes associated with stressor reactivity. It is suggested that depression is a life-long disorder, which even after effective treatment, has a high rate of re-occurrence owing to sensitized processes or epigenetic factors that promote persistent alterations of gene expression.
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Affiliation(s)
- Hymie Anisman
- Institute of Neuroscience, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
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Reiss D, Wolter-Sutter A, Krezel W, Ouagazzal AM. Effects of social crowding on emotionality and expression of hippocampal nociceptin/orphanin FQ system transcripts in mice. Behav Brain Res 2007; 184:167-73. [PMID: 17697718 DOI: 10.1016/j.bbr.2007.07.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 06/29/2007] [Accepted: 07/06/2007] [Indexed: 11/19/2022]
Abstract
The novel nociceptin/orphanin FQ (N/OFQ) system was proposed to be an important component of neural circuits involved in stress-coping behaviour and fear. This study investigated whether variations between the mouse strains in vulnerability to social crowding stress might be linked to different regulation of N/OFQ system transcripts in mice. Three weeks old C57BL/6J (B6), BALB/cByJ (CBy) and 129S2/SvPas (129S2) male mice were housed individually or in crowded (7/cage) conditions and then tested as adults in a battery of anxiety tests (open field, elevated plus-maze and acoustic startle reflex tests). Both 129S2 and B6 mice displayed increased signs of anxiety under crowded housing, while CBy mice tended to show the opposite profile. Analysis of gene expression revealed a 10-fold increase of nociceptin precursor and 4-fold increase of the NOP receptor mRNAs contents in the hippocampus of CBy mice kept in crowded conditions compared to those housed individually. In B6 mice, mRNA level of the peptide precursor remained unchanged, while that of the receptor was increased by 2-fold under crowding compared to individual housing. No significant changes were detected in 129S2 mice. These findings show that social housing may be important environmental stress factor in mice depending on the strain. The possible involvement of central nociceptin mechanisms in behavioural resilience to social crowding stress is discussed.
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Affiliation(s)
- D Reiss
- ICS, 1 Rue Laurent Fries, BP 10142, 67404 Illkirch, France
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35
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Campbell-Sills L, Stein MB. Psychometric analysis and refinement of the Connor-davidson Resilience Scale (CD-RISC): Validation of a 10-item measure of resilience. J Trauma Stress 2007; 20:1019-28. [PMID: 18157881 DOI: 10.1002/jts.20271] [Citation(s) in RCA: 1591] [Impact Index Per Article: 93.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Resilience refers to an individual's ability to thrive despite adversity. The current study examined the psychometric properties of the Connor-Davidson Resilience Scale (CD-RISC). Three undergraduate samples (ns < 500) were used to determine the factor structure of the CD-RISC. The first two samples were used to conduct exploratory factor analysis (EFA), and the third was used for confirmatory factor analysis. The EFA showed that the CD-RISC had an unstable factor structure across two demographically equivalent samples. A series of empirically driven modifications was made, resulting in a 10-item unidimensional scale that demonstrated good internal consistency and construct validity. Overall, the 10-item CD-RISC displays excellent psychometric properties and allows for efficient measurement of resilience.
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Affiliation(s)
- Laura Campbell-Sills
- Department of Psychiatry, University of California San Diego, La Jolla, CA 92037, USA.
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Boyce-Rustay JM, Janos AL, Holmes A. Effects of chronic swim stress on EtOH-related behaviors in C57BL/6J, DBA/2J and BALB/cByJ mice. Behav Brain Res 2007; 186:133-7. [PMID: 17822784 PMCID: PMC2695676 DOI: 10.1016/j.bbr.2007.07.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2007] [Revised: 06/06/2007] [Accepted: 07/19/2007] [Indexed: 11/26/2022]
Abstract
There is a strong clinical relationship between stress and stress-related disorders and the incidence of alcohol abuse and alcoholism, and this relationship appears to be partly genetic in origin. There are marked strain differences in ethanol (EtOH)-related behaviors and reactivity to stress, but little investigation of the interaction between the two. The present study assessed the effects of chronic exposure to swim stress on EtOH-related behavior in three common inbred strains of mice, C57BL/6J, DBA/2J and BALB/cByJ. After establishing baseline (10%) EtOH self-administration in a two-bottle free choice test, mice were exposed to daily swim stress for 14 consecutive days and EtOH consumption was measured as a percent of baseline both during stress and for 10 days afterwards. A separate experiment examined the effects of 14 days of swim stress on sensitivity to the sedative/hypnotic effects of an acute injection of 4g/kg EtOH. Results showed that stress produced a significant decrease in EtOH consumption, relative to pre-stress baseline, in DBA/2J and BALB/cByJ, but not C57BL/6J mice. By contrast, stress increased sensitivity to the sedative/hypnotic effects of EtOH in all three strains. These findings demonstrate that chronic swim stress produces reductions in EtOH self-administration in a strain-dependent manner, and that these effects may be restricted to strains with a pre-existing aversion to EtOH. Present data also demonstrates a dissociation between effects of this stressor on EtOH self-administration and sensitivity to EtOH's sedative/hypnotic effects. In conclusion, strain differences, that are likely in large part genetic in nature, modify the effects of this stressor on EtOH's effects in a behavior-specific manner.
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Affiliation(s)
- Janel M Boyce-Rustay
- Section on Behavioral Science and Genetics, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, Rockville, MD, USA.
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37
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Corticotropin releasing hormone receptor alterations elicited by acute and chronic unpredictable stressor challenges in stressor-susceptible and resilient strains of mice. Behav Brain Res 2007; 181:180-90. [PMID: 17517441 DOI: 10.1016/j.bbr.2007.04.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Revised: 04/05/2007] [Accepted: 04/07/2007] [Indexed: 11/28/2022]
Abstract
Stressors increase corticotropin releasing hormone (CRH) functioning in hypothalamic and frontal cortical brain regions, and thus may contribute to the provocation of anxiety and depressive disorder. As the effects of stressors on these behavioral changes are more pronounced in some strains of mice (e.g., BALB/cByJ) than in others (e.g., C57BL/6ByJ), the present investigation assessed whether acute and chronic stressors would differentially influence CRH receptor immunoreactivity (ir-CRHr) and CRH receptor mRNA expression (CRH(1) and CRH(2)) in the orbital frontal cortex (OFC) of these strains. An acute noise stressor, and to a greater extent a chronic, variable stressor regimen reduced ir-CRHr in BALB/cByJ mice. In contrast, in the hardier C57BL/6ByJ mice the acute stressor increased ir-CRHr in portions of the OFC, whereas a chronic stressor tended to reduce ir-CRHr. However, whereas the acute stressor did not influence CRH(1) mRNA expression, the chronic stressor increased CRH(1) mRNA expression in both mouse strains. The CRH(2) expression appeared in low abundance in both strains and was unaltered by the stressor. In addition to the OFC variations, quantitative immunohistochemistry indicated that the chronic stressor treatment increased CRH immunoreactivity in the median eminence of C57BL/6ByJ mice, but co-expression of CRH and arginine vasopressin (AVP) immunoreactivity was not provoked by the stressors. The data support the view that stressors provoke marked variations of ir-CRHr in the OFC that might contribute to the differential anxiety/depression-like profiles ordinarily apparent in the stressor-vulnerable and -resilient mouse strains.
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Millstein RA, Holmes A. Effects of repeated maternal separation on anxiety- and depression-related phenotypes in different mouse strains. Neurosci Biobehav Rev 2007; 31:3-17. [PMID: 16950513 DOI: 10.1016/j.neubiorev.2006.05.003] [Citation(s) in RCA: 302] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Revised: 04/27/2006] [Accepted: 05/25/2006] [Indexed: 11/22/2022]
Abstract
Genetic factors and early life adversity both play a major role in the etiology of mood and anxiety disorders. Previous studies have shown that postnatal maternal separation (MS) can produce lasting abnormalities in emotion-related behavior and neuroendocrine responses to stress in rodents. The present study sought to examine the effects of repeated MS in eight different inbred strains of mice (129S1/SvImJ, 129P3/J, A/J, BALB/cJ, BALB/cByJ C57BL/6J, DBA/2J, FVB/NJ). Pups were separated from their dam and littermates for 180 min/day ('MS') or 15 min/day ('handling'), or left undisturbed ('facility-reared') from postnatal days P0-P13, and tested as adults for anxiety- and depression-related behaviors. Results demonstrated no clear and consistent effects of MS or handling on behavioral phenotypes in any of the strains tested. In all strains, MS produced an increase in maternal care on reunion with pups, which may have modified MS effects. Data demonstrate that the MS procedure employed does not provide a robust model of early life stress effects on the anxiety- and depression-related behaviors in the mouse strains tested.
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Affiliation(s)
- Rachel A Millstein
- Section on Behavioral Science and Genetics, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, 5625 Fishers Lane, Room 2N09, Rockville, MD 20852, USA
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39
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Jacobson LH, Cryan JF. Feeling strained? Influence of genetic background on depression-related behavior in mice: a review. Behav Genet 2006; 37:171-213. [PMID: 17029009 DOI: 10.1007/s10519-006-9106-3] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Accepted: 08/11/2006] [Indexed: 02/03/2023]
Abstract
Depression is a growing pandemic in developed societies. The use of inbred mouse strains in pre-clinical psychiatric research has proven to be a valuable resource. Firstly, they provide the background for genetic manipulations that aid in the discovery of molecular pathways that may be involved in major depression. Further, inbred mouse strains are also being used in the determination of genetic and environmental influences that may pre-dispose or trigger depression-related behavior. This review aims to highlight the utility of inbred mouse strains in depression research, while providing an overview of the current state of research into behavioral differences between strains in paradigms commonly used in the field. Neurochemical differences that may underlie strain differences are examined, and some caveats and cautions associated with the use of inbred strains are highlighted.
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Affiliation(s)
- L H Jacobson
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4002, Basel, Switzerland
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40
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Schiller L, Donix M, Jähkel M, Oehler J. Serotonin 1A and 2A receptor densities, neurochemical and behavioural characteristics in two closely related mice strains after long-term isolation. Prog Neuropsychopharmacol Biol Psychiatry 2006; 30:492-503. [PMID: 16412547 DOI: 10.1016/j.pnpbp.2005.11.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/23/2005] [Indexed: 11/18/2022]
Abstract
Knowledge about individual differences in behavioural traits and their neurostructural and neurochemical correlates should improve therapeutic approaches of corresponding psychopathology. The presented investigations are aimed to reveal interrelationships between central nervous serotonergic [5-HT] receptor densities and neurochemical as well as behavioural traits in two mice strains. Male AB-Halle [ABH] and AB-Gatersleben [ABG] mice differing in aggression were investigated after 6 weeks of isolation housing. 5-HT1A and 5-HT2A receptors were analysed in different brain regions by in vitro autoradiography. HPLC determinations of aminergic transmission in the cortex, hippocampus, striatum as well as in the raphe-region and radioimmunoassay determination of serum corticosterone were done before (basal condition) and after behavioural tests (challenge condition). Receptor autoradiography revealed higher 5-HT1A receptor densities, especially in limbic regions, and lower 5-HT2A receptor densities in the basal ganglia of ABH mice. Furthermore, ABH mice characterized as behaviourally more active in the open field and plus maze as well as more reactive and aggressive during the social interaction test showed lower basal 5-hydroxyindolacetic acid [5-HIAA] concentrations in the hippocampus, cortex and raphe-region as well as a different activation pattern in serotonergic, dopaminergic and noradrenergic brain systems after challenge in comparison to ABG mice. Additionally lower corticosterone concentrations were found in ABH mice. Lower basal serotonergic and striatal dopaminergic, but higher basal cortical dopaminergic metabolism in contrast to enhanced challenge-induced central nervous serotonergic and cortical dopaminergic reactivities are discussed to be crucial for an enhanced reactive behavioural trait, which could secondarily result in aggression-related behaviours, where higher 5-HT1A receptor and lower 5-HT2A receptor densities may be essential.
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Affiliation(s)
- Lydia Schiller
- AG Neurobiologie, Klinik für Psychiatrie, Universitätsklinikum der TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
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41
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Stewart JA. The Detrimental Effects of Allostasis: Allostatic Load as a Measure of Cumulative Stress. J Physiol Anthropol 2006; 25:133-45. [PMID: 16617218 DOI: 10.2114/jpa2.25.133] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Since its inception in the 1980s, through further developments during the 1990s, and continuing today, the paradigm of allostatic load (AL) has becomed an important paradigm for predicting senescence and mortality. AL is a cumulative measure of the effects of multiple stressors and the process of responding to stressors on the soma. AL measurements of individuals is being tested on various samples and species and being reported across a variety of medical and social science journals. From the ISI Web of Science, all articles published between January 2000 and June 2005 with AL in any default category were obtained and transferred to Endnote. These articles, categorized as theory/review or data-driven, human or animal, and variability in risk factors used to estimate AL, are reviewed here. Only two of 90 reports were published in anthropological journals, likely, at least partly, because research on AL has focused more on western, industrialized populations where data are more easily obtained. From 2000-2005, 12 of 42 data-driven reports focused on elderly humans. Studies of animal models also are common (0 in 2000, but 4 in 2004 covering 21 species). During the last year, multiple additional potential physiological variables have been tested as measures of AL (10 to 20 in any one article). In the past half decade, AL also has been introduced to a wide range of disciplines, including psychology, anthropology, gerontology, veterinary medicine, and medical specialties, as a viable research theme. AL appears to provide a useful method for determining cumulative somatic stress such as that seen with senescence and frailty at older ages.
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Affiliation(s)
- James A Stewart
- Social and Behavioral Sciences, Columbus State Community College, Columbus, OH 43216, USA.
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Abstract
Numerous animal models of depression have been advanced, each having multiple attributes and some limitations. This review provides caveats concerning etiologically valid animal models of depression, focusing on characteristics of the depressive subtype being examined (e.g. typical vs atypical major depression, dysthymia, melancholia), and factors that contribute to the interindividual behavioral variability frequently evident in stressor-related behavioral paradigms. These include the stressor type (processive vs systemic stressors), and characteristics of the stressor (controllability, predictability, ambiguity, chronicity, intermittence), as well as organismic variables (genetic, age, sex), experiential variables (stressor history, early life events) and psychosocial and personality factors that moderate stressor reactivity. Finally, a model of depression is reviewed that evaluates the effects of stressors on hedonic processes, reflected by responding for rewarding brain stimulation. Anhedonia is a fundamental feature of depression, and assessment of stressor-related reductions in the rewarding value of brain stimulation, especially when coupled with other potential symptoms of depression, provides considerable face, construct and predictive validity. Stressful events markedly impact rewarding brain stimulation, and this effect varies across strains of mice differentially reactive to stressors, is modifiable by antidepressant treatments, and allows for analyses of the contribution of different brain regions to anhedonic processes. The paradigm is sensitive to several factors known to acts as moderators of stress responses, but analyses remain to be conducted with regard to several such variables.
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Affiliation(s)
- Hymie Anisman
- Institute of Neuroscience, Carleton University, LSRB, Ottawa, Ont., Canada K1S 5B6.
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Ducottet C, Aubert A, Belzung C. Susceptibility to subchronic unpredictable stress is related to individual reactivity to threat stimuli in mice. Behav Brain Res 2005; 155:291-9. [PMID: 15364489 DOI: 10.1016/j.bbr.2004.04.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2004] [Accepted: 04/30/2004] [Indexed: 10/26/2022]
Abstract
As in many complex behavioral responses, inter-individual variability can be observed in the responses to a chronic mild stress. While some subjects exhibit more resilient behaviours, others appear more susceptible to stress. This study hypothesizes that this variability relies on the individual appraisal of the stressful event. To study this assumption, mice were first subjected to a conditioned task occurring in a circular arena. In this task, a mild air-puff (i.e. stressor) in a given quadrant of the arena was coupled with the presence or the absence of a light in the same quadrant. Half of mice were then submitted to a 15-day subchronic stress consisting in various environmental and social mild stressors randomly applied two or three times a day. At the end of this procedure, the occurrence of depressive-like behaviours in stressed mice was assessed using measures of the stress regime (i.e. physical state, choice test, grooming test). The physical state assessed the physical appearance of mice. The grooming test consisted in measuring the time spent in grooming after mice were sprayed upon with a viscous solution. The choice test consisted in measuring the time spent in an uncomfortable place (i.e. whose floor was covered with damp sawdust) versus a more comfortable one (i.e. with dry sawdust) to evaluate the reactivity to a negative stimulus previously encountered during the subchronic stress. Multiple regression analyses revealed a relationship between attention toward salient stressful stimuli in the conditioned task and susceptibility to the subchronic stress procedure. These results are discussed regarding their relevance for the understanding of aetiologies of depressive illnesses.
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Affiliation(s)
- C Ducottet
- EA3248 Psychobiologie des Emotions, UFR des Sciences et Techniques, Parc de Grandmont, 37 200 Tours, France.
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44
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Davidson JRT, Payne VM, Connor KM, Foa EB, Rothbaum BO, Hertzberg MA, Weisler RH. Trauma, resilience and saliostasis: effects of treatment in post-traumatic stress disorder. Int Clin Psychopharmacol 2005; 20:43-8. [PMID: 15602116 DOI: 10.1097/00004850-200501000-00009] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
There has been growing interest in the concept of resilience and the question as to whether psychotropic medications or psychosocial treatments might have resilience-enhancing effects. This pilot study investigates resilience in a sample of patients with post-traumatic stress disorder (PTSD) before and after treatment. Effects of treatment with tiagabine, fluoxetine, sertraline alone, and sertraline with cognitive behavioural therapy on resilience were assessed using the Connor-Davidson Resilience Scale (CD-RISC). Changes in resilience after treatment were measured and response to treatment was predicted from demographic, resilience and baseline disability measures. Changes in resilience following treatment were statistically significant. Items that showed the greatest change related to confidence, control, coping, knowing where to turn for help and adaptability. Items showing the least change related to religious and existential aspects of resiliency, effort, acting on a hunch, decision-making and goals. In linear and logistic regression models, gender, baseline CD-RISC score, baseline Sheehan Disability Scale score and an individual item from the CD-RISC scale, 'Sense of Humor', were significant predictors of response to treatment. Treatment of PTSD significantly improved resilience and reduced symptoms in this sample. Further controlled studies are indicated.
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Affiliation(s)
- Jonathan R T Davidson
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina 27710, USA.
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45
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Osuch E, Engel CC. Research on the Treatment of Trauma Spectrum Responses: The Role of the Optimal Healing Environment and Neurobiology. J Altern Complement Med 2004. [DOI: 10.1089/acm.2004.10.s-211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Elizabeth Osuch
- Department of Psychiatry, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Charles C. Engel
- Deployment Health Clinical Center, Walter Reed Army Center, Washington, DC
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46
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Tannenbaum BM, Tannenbaum GS, Anisman H. Impact of life-long macronutrient choice on neuroendocrine and cognitive functioning in aged mice: differential effects in stressor-reactive and stressor-resilient mouse strains. Brain Res 2003; 985:187-97. [PMID: 12967723 DOI: 10.1016/s0006-8993(03)03196-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Nutrient selection emerges as a result of both genetic and environmental factors and may be further modified by stressors. The impact of this complex interrelationship on pathological outcomes is poorly understood. In the present investigation the stressor-reactive BALB/cByJ and the relatively stressor resilient C57BL/6ByJ mice were maintained on a macronutrient selection protocol or given free access to chow for 20 months. The C57BL/6ByJ mice exhibited a marked preference for fat over carbohydrates, whereas BALB/cByJ mice preferred carbohydrates over fat. Cognitive testing in a Morris water maze indicated that while BALB/cByJ mice were clearly more impaired in this task relative to their C57BL/6ByJ counterparts, there was no substantial effect of the diet at either 13 or 19 months of age. Furthermore, despite their stressor resiliency, at 19 months of age, C57BL/6ByJ mice who invariably consumed fat, exhibited greater plasma corticosterone responses to a 20-min period of restraint than chow fed animals. Indeed, the corticosterone rise was as pronounced as in the more reactive BALB/cByJ strain. Furthermore, the C57BL/6ByJ diet-fed mice showed features of insulin insensitivity and increased adiposity. These data suggest that the adverse effects of fat consumption need to be considered in the context of genetically determined vulnerability/resilience factors.
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Affiliation(s)
- Beth M Tannenbaum
- Institute of Neuroscience, Carleton University, Ottawa, Ontario, Canada K1S 5B6.
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