1
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Craft RM. Burrowing as an index of inflammatory pain in male vs. female rats. Behav Pharmacol 2023; 34:55-67. [PMID: 36473021 DOI: 10.1097/fbp.0000000000000711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The study objective was to determine whether burrowing behavior is useful as a functional index of pain in both male and female rats, and whether a 'no-training' protocol can be used to increase testing efficiency. Adult Sprague-Dawley rats were injected in one or both hindpaws with oil vehicle or complete Freund's adjuvant (CFA); starting the next day, the amount of gravel each rat burrowed out of a tube in 1 h was measured daily for ≤7 days. Without preliminary training on the burrowing procedure, CFA reliably suppressed burrowing for 2-3 days compared to controls, in both sexes. However, whereas unilateral CFA completely suppressed burrowing 1-day post-CFA in nearly all males, bilateral CFA was required to do so in females. When administered 30 min before testing, once daily for 5 days post-CFA, the nonsteroidal anti-inflammatory drug ketoprofen (0.01-3.2 mg/kg) and the opioid morphine (0.1-3.2 mg/kg) significantly increased CFA-suppressed burrowing, whereas the purported cannabinoid analgesic Δ 9 -tetrahydrocannabinol (0.01-2.0 mg/kg) did not. The benzodiazepine chlordiazepoxide (1.25-10 mg/kg), included as a 'true negative' control, also did not restore CFA-suppressed burrowing in either sex. However, in CFA-treated males only, chlordiazepoxide decreased burrowing, suggesting that anxiety may contribute to burrowing in males but not females that are in pain. Overall these results suggest that burrowing is a valid, functional index of inflammatory pain in both sexes, and training on the burrowing procedure is not necessary. However, females are more avid burrowers than males, which should be considered when both sexes are used in inflammatory pain testing.
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Affiliation(s)
- Rebecca M Craft
- Department of Psychology, Washington State University, Pullman, Washington, USA
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2
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Pittman DW, McGinnis MM, Liddy C, Richardson LM, Ellison ZT, Baird JP. Further disentangling the motivational processes underlying benzodiazepine hyperphagia. Pharmacol Biochem Behav 2022; 218:173426. [PMID: 35810922 DOI: 10.1016/j.pbb.2022.173426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 01/05/2023]
Abstract
In addition to their well-known anxiolytic functions, benzodiazepines produce hyperphagia. Previously, we reported that the benzodiazepine, chlordiazepoxide (CDP), increased consumption of both normally-preferred and normally-avoided taste stimuli during long-term (1 h) tests, primarily through changes in licking microstructure patterns associated with hedonic taste evaluation, whereas there was little effect on licking microstructure measures associated with post-ingestive feedback. In this study, we further examined the hedonic and motivational specificity of CDP effects on ingestive behavior. We tested brief access (15 s) licking responses for tastants spanning all taste qualities after treatment with either CDP (5 or 10 mg/kg) or the non-benzodiazepine anxiolytic, buspirone (1.5 or 3 mg/kg). A between-subjects, counterbalanced design compared the CDP or buspirone effects on licking responses for water and a range of weak to strong concentrations of NaCl, Q-HCl, citric acid, MSG, saccharin, and capsaicin under water-restricted (23 h) conditions; and sucrose, saccharin, and MSG under water-replete conditions. In a dose dependent manner, CDP increased licking for taste stimuli that were normally-avoided after saline treatment, with a notable exception observed for the trigeminal stimulus, capsaicin, which was not affected at any concentration or drug dose, suggesting a taste-specific effect of CDP on orosensory processing. Under water-replete conditions, CDP dose-dependently increased licking to normally-accepted concentrations of sucrose, saccharin, and MSG. There was no effect of either drug on licks for water under either water-restricted or water-replete conditions. Buspirone slowed oromotor coordination by increasing brief interlick intervals, but it did not affect licking for any concentrations of the tastants. Overall, these results indicate that benzodiazepines selectively enhance the hedonic acceptance of gustatory orosensory stimuli, independent of general anxiolytic or oromotor coordination effects, or physiological states such as thirst.
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Affiliation(s)
- David W Pittman
- Department of Psychology, Wofford College, 429 North Church Street, Spartanburg, SC 29303-3663, USA.
| | - Molly M McGinnis
- Department of Psychology, Wofford College, 429 North Church Street, Spartanburg, SC 29303-3663, USA
| | - Caroline Liddy
- Department of Psychology, Wofford College, 429 North Church Street, Spartanburg, SC 29303-3663, USA
| | - Lindsey M Richardson
- Department of Psychology, Wofford College, 429 North Church Street, Spartanburg, SC 29303-3663, USA
| | - Zachary T Ellison
- Department of Psychology, Wofford College, 429 North Church Street, Spartanburg, SC 29303-3663, USA
| | - John-Paul Baird
- Department of Psychology, Amherst College, P.O. Box 5000, Amherst, MA 01002-5000, USA
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3
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Lovick TA, Zangrossi H. Effect of Estrous Cycle on Behavior of Females in Rodent Tests of Anxiety. Front Psychiatry 2021; 12:711065. [PMID: 34531768 PMCID: PMC8438218 DOI: 10.3389/fpsyt.2021.711065] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 08/04/2021] [Indexed: 11/13/2022] Open
Abstract
Anxiety disorders are more prevalent in women than in men. In women the menstrual cycle introduces another variable; indeed, some conditions e.g., premenstrual syndrome, are menstrual cycle specific. Animal models of fear and anxiety, which form the basis for research into drug treatments, have been developed almost exclusively, using males. There remains a paucity of work using females and the available literature presents a confusing picture. One confound is the estrous cycle in females, which some authors consider, but many do not. Importantly, there are no accepted standardized criteria for defining cycle phase, which is important given the rapidly changing hormonal profile during the 4-day cycle of rodents. Moreover, since many behavioral tests that involve a learning component or that consider extinction of a previously acquired association require several days to complete; the outcome may depend on the phase of the cycle on the days of training as well as on test days. In this article we consider responsiveness of females compared to males in a number of commonly used behavioral tests of anxiety and fear that were developed in male rodents. We conclude that females perform in a qualitatively similar manner to males in most tests although there may be sex and strain differences in sensitivity. Tests based on unconditioned threatening stimuli are significantly influenced by estrous cycle phase with animals displaying increased responsiveness in the late diestrus phase of the cycle (similar to the premenstrual phase in women). Tests that utilize conditioned fear paradigms, which involve a learning component appear to be less impacted by the estrous cycle although sex and cycle-related differences in responding can still be detected. Ethologically-relevant tests appear to have more translational value in females. However, even when sex differences in behavior are not detected, the same outward behavioral response may be mediated by different brain mechanisms. In order to progress basic research in the field of female psychiatry and psychopharmacology, there is a pressing need to validate and standardize experimental protocols for using female animal models of anxiety-related states.
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Affiliation(s)
- Thelma A. Lovick
- Physiology, Pharmacology & Neuroscience, University of Bristol, Bristol, United Kingdom
| | - Hélio Zangrossi
- Department of Pharmacology, Ribeirão Preto Medical School of the University of São Paulo, Ribeirão Preto, Brazil
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Rodríguez-Landa JF, Guillén-Ruiz G, Hernández-López F, Cueto-Escobedo J, Rivadeneyra-Domínguez E, Bernal-Morales B, Herrera-Huerta EV. Chrysin reduces anxiety-like behavior through actions on GABA A receptors during metestrus-diestrus in the rat. Behav Brain Res 2020; 397:112952. [PMID: 33017640 DOI: 10.1016/j.bbr.2020.112952] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 09/22/2020] [Accepted: 09/27/2020] [Indexed: 01/20/2023]
Abstract
Low concentrations of ovarian hormones, among other factors, are associated with greater vulnerability to negative effects of environmental stressors and may trigger anxiety symptoms in females. The flavonoid chrysin (5,7-dihydroxyflavone) exerts anxiolytic-like effects in male and ovariectomized female rats, but it is unknown if chrysin could reduce anxiety-like behavior that naturally occurs through the ovarian cycle phases. The present study evaluated the effect of chrysin on anxiety-like behavior associated with the ovarian cycle phases in rats and the participation of γ-aminobutyric acid-A (GABAA) receptors in these actions. The acute effects of chrysin (2 mg/kg) were investigated in female cycling Wistar rats in the elevated plus maze, locomotor activity test, and light/dark test. Diazepam (2 mg/kg) was used as reference anxiolytic drug. The participation of GABAA receptor in the anxiolytic actions of chrysin was explored by pretreating the rats with the noncompetitive GABAA chloride ion channel antagonist picrotoxin (1 mg/kg). Chrysin and diazepam prevented anxiety-like behavior that was associated with the metestrus-diestrus phase in both the elevated plus maze and light/dark test, and these effects were reversed by picrotoxin, with no significant changes in spontaneous locomotor activity. No significant motor effects of chrysin were detected in either behavioral test during proestrus-estrus or metestrus-diestrus phases, whereas diazepam produced motor hypoactivity in the locomotor activity test during proestrus-estrus phase. These results indicate that the flavonoid chrysin prevents anxiety-like behavior that naturally occurs during metestrus-diestrus in two unconditioned models that are used to evaluate anxiety-like behavior, and these effects were mediated by actions on GABAA receptors.
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Affiliation(s)
- Juan Francisco Rodríguez-Landa
- Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico; Facultad de Química Farmacéutica Biológica, Universidad Veracruzana, Xalapa, Veracruz, Mexico.
| | - Gabriel Guillén-Ruiz
- Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico; Cátedras CONACyT-Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | - Fabiola Hernández-López
- Unidad de Medicina Familiar No. 66, Instituto Mexicano del Seguro Social, Xalapa, Veracruz, Mexico
| | - Jonathan Cueto-Escobedo
- Departamento de Investigación Clínica y Traslacional, Instituto de Ciencias de la Salud, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | | | - Blandina Bernal-Morales
- Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, Mexico; Facultad de Química Farmacéutica Biológica, Universidad Veracruzana, Xalapa, Veracruz, Mexico
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La-Vu M, Tobias BC, Schuette PJ, Adhikari A. To Approach or Avoid: An Introductory Overview of the Study of Anxiety Using Rodent Assays. Front Behav Neurosci 2020; 14:145. [PMID: 33005134 PMCID: PMC7479238 DOI: 10.3389/fnbeh.2020.00145] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/28/2020] [Indexed: 12/21/2022] Open
Abstract
Anxiety is a widely studied phenomenon in behavioral neuroscience, but the recent literature lacks an overview of the major conceptual framework underlying anxiety research to introduce young researchers to the field. In this mini-review article, which is aimed toward new undergraduate and graduate students, we discuss how researchers exploit the approach-avoidance conflict, an internal conflict rodents face between exploration of novel environments and avoidance of danger, to inform rodent assays that allow for the measurement of anxiety-related behavior in the laboratory. We review five widely-used rodent anxiety assays, consider the pharmacological validity of these assays, and discuss neural circuits that have recently been shown to modulate anxiety using the assays described. Finally, we offer related lines of inquiry and comment on potential future directions.
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Affiliation(s)
- Mimi La-Vu
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Brooke C Tobias
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Peter J Schuette
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Avishek Adhikari
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, United States
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6
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Meng Z, Berro LF, Sawyer EK, Rüedi-Bettschen D, Cook JE, Li G, Platt DM, Cook JM, Rowlett JK. Evaluation of the anti-conflict, reinforcing, and sedative effects of YT-III-31, a ligand functionally selective for α3 subunit-containing GABA A receptors. J Psychopharmacol 2020; 34:348-357. [PMID: 31670615 PMCID: PMC8011597 DOI: 10.1177/0269881119882803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND In recent years, pharmacological strategies have implicated α3 subunit-containing GABAA (α3GABAA) receptor subtypes in the anxiety-reducing effects of benzodiazepines, whereas transgenic mouse approaches have implicated α2 or α5 subunit-containing GABAA receptors. AIMS We investigated the role of α3GABAA subtypes in benzodiazepine-induced behaviors by evaluating the anti-conflict, reinforcing, and sedative-motor effects of the novel compound YT-III-31, which has functional selectivity for α3GABAA receptors. METHODS Female and male rhesus monkeys were trained under a conflict procedure (n = 3), and a progressive-ratio schedule of reinforcement with midazolam as the training drug (n = 4). Sedative-like behavior was assessed using a quantitative behavioral observation procedure (n = 4). A range of doses of YT-III-31 was administered in all tests using the i.v. route of administration. RESULTS In the conflict procedure, increasing doses of YT-III-31 resulted only in dose-dependent attenuation of non-suppressed responding. In the progressive-ratio model of self-administration, YT-III-31 maintained average injections/session above vehicle levels at 0.1 and 0.18 mg/kg/injection. In quantitative observation procedures, YT-III-31 engendered mild sedative effects ("rest/sleep posture"), and deep sedation at the highest dose tested (5.6 mg/kg, i.v.), along with a suppression of tactile/oral exploration and increased observable ataxia. In contrast to other benzodiazepine-like ligands, YT-III-31 uniquely engendered a biphasic dose-response function for locomotion and suppressed self-groom. CONCLUSIONS The finding that YT-III-31 lacked anti-conflict properties is in accordance with transgenic mouse research indicating no role for α3GABAA subtypes in benzodiazepine-mediated anxiety reduction. Instead, our results raise the possibility of a role for α3GABAA receptors in the abuse potential and sedative effects of benzodiazepine-type drugs.
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Affiliation(s)
- Zhiqiang Meng
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA,New England Primate Research Center, Harvard Medical School, Southborough, MA, USA,Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, CHINA
| | - Lais F Berro
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA
| | - Eileen K Sawyer
- New England Primate Research Center, Harvard Medical School, Southborough, MA, USA
| | - Daniela Rüedi-Bettschen
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA
| | - Jemma E Cook
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA
| | - Guanguan Li
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Donna M Platt
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA,New England Primate Research Center, Harvard Medical School, Southborough, MA, USA
| | - James M Cook
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - James K Rowlett
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA,New England Primate Research Center, Harvard Medical School, Southborough, MA, USA
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7
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Hiew LF, Khairuddin S, Aquili L, Koh J, Fung ML, Lim WL, Lim LW. Behavioural responses of anxiety in aversive and non-aversive conditions between young and aged Sprague-Dawley rats. Behav Brain Res 2020; 385:112559. [PMID: 32097707 DOI: 10.1016/j.bbr.2020.112559] [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: 09/09/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/20/2022]
Abstract
Measures of anxiety in behavioural tests remain largely unclear even decades after their establishment. Differences in the severity of anxiety measured by anxiety tests is an important issue that must be addressed. To test the hypothesis that the addition of light as an aversive stimulus will elicit a difference in behaviour between aged and young animals, we compared the responses of aged and young animals in the home cage emergence test (HCET) and elevated plus maze (EPM), in high aversive bright light and low aversive dim light conditions. In the HCET, our results demonstrated that young animals escaped with shorter latency and greater frequency than aged animals in both bright and dim light conditions, indicating that young animals display greater exploratory tendencies than aged animals. In the EPM, bright light conditions induced anxiogenic effects in both age groups. Interestingly, two-way ANOVA showed a significant interaction effect of age and light on the number of entries into the open arms of the EPM as well as frequency of escape in the HCET. These results show that the addition of light as an aversive stimulus in the EPM and HCET produced different responses in aged versus young animals in each test. In conclusion, significant interactions between age and light affected aged and young animals differently in the HCET and EPM, indicating that the two tests measure different aspects of anxiety.
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Affiliation(s)
- Lih Fhung Hiew
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China
| | - Sharafuddin Khairuddin
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China
| | - Luca Aquili
- School of Psychological and Clinical Sciences, Charles Darwin University, Darwin, Australia
| | - Junhao Koh
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China; Department of Biological Sciences, School of Science and Technology, Sunway University, Malaysia
| | - Man-Lung Fung
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China
| | - Wei Ling Lim
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China; Department of Biological Sciences, School of Science and Technology, Sunway University, Malaysia.
| | - Lee Wei Lim
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, China; Department of Biological Sciences, School of Science and Technology, Sunway University, Malaysia.
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8
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Responses to positive and aversive stimuli in estrous female rats housed in a seminatural environment: Effects of yohimbine and chlordiazepoxide. Pharmacol Biochem Behav 2019; 179:43-54. [DOI: 10.1016/j.pbb.2019.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/24/2019] [Accepted: 02/04/2019] [Indexed: 11/18/2022]
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9
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Tripathi SJ, Chakraborty S, Srikumar BN, Raju TR, Shankaranarayana Rao BS. Basolateral amygdalar inactivation blocks chronic stress-induced lamina-specific reduction in prefrontal cortex volume and associated anxiety-like behavior. Prog Neuropsychopharmacol Biol Psychiatry 2019; 88:194-207. [PMID: 30036565 DOI: 10.1016/j.pnpbp.2018.07.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 07/12/2018] [Accepted: 07/15/2018] [Indexed: 12/20/2022]
Abstract
Chronic exposure to stress causes cognitive deficits, anxiety and depression. Earlier studies have suggested that the prefrontal cortex (PFC) and basolateral amygdala (BLA) can differentially modulate the stress-induced alterations either by their action on HPA axis or via direct reciprocal connections between them. The PFC dysfunction and BLA hypertrophy following stress are known to cause anxiety and affective symptoms. Recent studies indicate that inactivation of BLA projections to PFC remarkably decreases anxiety. However, the effect of BLA inactivation on stress-induced anxiety and associated volume loss in prelimbic (PrL) and anterior cingulate (ACC) subregions of PFC is not known. Accordingly, we evaluated the effect of BLA lesion or inactivation during chronic immobilization stress (CIS) on an approach-avoidance task and associated volume loss in the PFC. The stressed rats showed a significant volumetric reduction in layer I and II of the PrL and ACC. Interestingly, BLA lesion prior to stress prevented the volume loss in PrL and ACC. Further, BLA lesion blocked the anxiety-like behavior in stressed rats. However, in the absence of stress, BLA lesion increased the number of shocks as compared to controls. As BLA lesion produced an anticonflict effect, we performed temporary inactivation of BLA specifically during stress. Similar to BLA lesion, lidocaine-induced inactivation prevented the stress-induced volume loss and anxiety-like behavior. We demonstrate that inactivation of BLA during stress prevents CIS-induced anxiety and associated structural correlates in the PFC. The present study extends the hypothesis of amygdalar silencing as a possible management strategy for stress and associated disorders.
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Affiliation(s)
- Sunil Jamuna Tripathi
- Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, Hosur Road, Bengaluru 560 029, India
| | - Suwarna Chakraborty
- Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, Hosur Road, Bengaluru 560 029, India
| | - B N Srikumar
- Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, Hosur Road, Bengaluru 560 029, India
| | - T R Raju
- Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, Hosur Road, Bengaluru 560 029, India
| | - B S Shankaranarayana Rao
- Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, Hosur Road, Bengaluru 560 029, India.
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Zhao Y, Bijlsma EY, Verdouw MP, Groenink L. No effect of sex and estrous cycle on the fear potentiated startle response in rats. Behav Brain Res 2018; 351:24-33. [DOI: 10.1016/j.bbr.2018.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/26/2018] [Accepted: 05/15/2018] [Indexed: 12/13/2022]
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11
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Eifediyi G, Ojugo AI, Aluede O. Effectiveness of rational emotive behaviour therapy in the reduction of examination Anxiety among secondary school students in Edo State, Nigeria. ASIA PACIFIC JOURNAL OF COUNSELLING AND PSYCHOTHERAPY 2017. [DOI: 10.1080/21507686.2017.1412329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gloria Eifediyi
- Counselling Unit, Irrua Specialist Teaching Hospital, Irrua, Nigeria
| | - Austine I. Ojugo
- Department of Guidance and Counselling, Faculty of Education, Ambrose Alli University, Ekpoma, Nigeria
| | - Oyaziwo Aluede
- Department of Guidance and Counselling, Faculty of Education, Ambrose Alli University, Ekpoma, Nigeria
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12
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Kirlic N, Young J, Aupperle RL. Animal to human translational paradigms relevant for approach avoidance conflict decision making. Behav Res Ther 2017; 96:14-29. [PMID: 28495358 DOI: 10.1016/j.brat.2017.04.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 04/17/2017] [Accepted: 04/20/2017] [Indexed: 12/29/2022]
Abstract
Avoidance behavior in clinical anxiety disorders is often a decision made in response to approach-avoidance conflict, resulting in a sacrifice of potential rewards to avoid potential negative affective consequences. Animal research has a long history of relying on paradigms related to approach-avoidance conflict to model anxiety-relevant behavior. This approach includes punishment-based conflict, exploratory, and social interaction tasks. There has been a recent surge of interest in the translation of paradigms from animal to human, in efforts to increase generalization of findings and support the development of more effective mental health treatments. This article briefly reviews animal tests related to approach-avoidance conflict and results from lesion and pharmacologic studies utilizing these tests. We then provide a description of translational human paradigms that have been developed to tap into related constructs, summarizing behavioral and neuroimaging findings. Similarities and differences in findings from analogous animal and human paradigms are discussed. Lastly, we highlight opportunities for future research and paradigm development that will support the clinical utility of this translational work.
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Affiliation(s)
- Namik Kirlic
- Laureate Institute for Brain Research, 6655 S Yale Ave, Tulsa, OK 74136, United States.
| | - Jared Young
- Department of Psychiatry, School of Medicine, University of California San Diego, 9500 Gilman Drive MC 0804, La Jolla, CA 92093, United States; VA San Diego Healthcare System, 3350 La Jolla Village Dr, San Diego, CA 92161, United States.
| | - Robin L Aupperle
- Laureate Institute for Brain Research, 6655 S Yale Ave, Tulsa, OK 74136, United States; School of Community Medicine, University of Tulsa, 800 S Tucker Dr, Tulsa, OK 74104, United States.
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13
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Silva AF, Sousa DS, Medeiros AM, Macêdo PT, Leão AH, Ribeiro AM, Izídio GS, Silva RH. Sex and estrous cycle influence diazepam effects on anxiety and memory: Possible role of progesterone. Prog Neuropsychopharmacol Biol Psychiatry 2016; 70:68-76. [PMID: 27208614 DOI: 10.1016/j.pnpbp.2016.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/10/2016] [Accepted: 05/17/2016] [Indexed: 12/13/2022]
Abstract
Studies with rodents and humans show the relationship between female sex hormones and cognitive/emotional tasks. However, despite the greater incidence of anxiety disorders in women, the data are still inconclusive regarding the mechanisms related to this phenomenon. We evaluated the effects of a classical anxiolytic/amnestic drug (diazepam; DZP) on female (at different estrous cycle phases) and male rats tested in the plus-maze discriminative avoidance task (PMDAT), that allows the concomitant evaluation of memory and anxiety-like behavior. Further, in order to investigate the role of progesterone and its metabolites in the effects of DZP in the PMDAT, female rats were pre-treated with the progesterone receptor antagonist mifepristone or the 5-alpha-reductase inhibitor finasteride. The main findings were: (1) DZP caused memory impairment and anxiolysis in both sexes, but only the highest dose induced the anxiolytic effect in females; (2) females in proestrus did not present the amnestic and anxiolytic effects of DZP (at 2.0 and 4.0mg/kg, respectively) and (3) the co-administration of mifepristone reestablished both amnestic and anxiolytic effects of DZP, while finasteride reinstated the amnestic effect in proestrus female rats. These results suggest that changes in the endogenous levels of progesterone and its metabolites are important in the modulation of emotional/cognitive behavior in female rats. Based on the influence on different aspects of DZP action, the mechanisms related to this modulation are probably linked to GABAergic transmission, but this point remains to be investigated. Further, the variation in therapeutic and adverse effects of DZP depending on sex and hormonal state is of great relevance considering the higher prevalence of anxiety disorders in women.
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Affiliation(s)
- Anatildes Feitosa Silva
- Memory Studies Laboratory, Physiology Department, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Diego Silveira Sousa
- Memory Studies Laboratory, Physiology Department, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - André Macêdo Medeiros
- Laboratory of Behavioral Neuroscience, Pharmacology Department, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Priscila Tavares Macêdo
- Memory Studies Laboratory, Physiology Department, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Anderson Henrique Leão
- Memory Studies Laboratory, Physiology Department, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Alessandra Mussi Ribeiro
- Laboratory of Neuroscience and Bioprospecting of Natural Products, Biosciences Department, Universidade Federal de São Paulo, Santos, Brazil
| | - Geison Souza Izídio
- Laboratory of Behavioral Genetics, Cell Biology, Embryology and Genetics Department, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Regina Helena Silva
- Memory Studies Laboratory, Physiology Department, Universidade Federal do Rio Grande do Norte, Natal, Brazil; Laboratory of Behavioral Neuroscience, Pharmacology Department, Universidade Federal de São Paulo, São Paulo, Brazil.
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14
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De Jesús-Burgos MI, González-García S, Cruz-Santa Y, Pérez-Acevedo NL. Amygdalar activation of group I metabotropic glutamate receptors produces anti- and pro-conflict effects depending upon animal sex in a sexually dimorphic conditioned conflict-based anxiety model. Behav Brain Res 2016; 302:200-12. [PMID: 26777900 PMCID: PMC4839301 DOI: 10.1016/j.bbr.2016.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 12/02/2015] [Accepted: 01/05/2016] [Indexed: 12/12/2022]
Abstract
Women are more susceptible than men to develop anxiety disorders, however, the mechanisms involved are still unclear. In this study, we investigated the role of group I metabotropic glutamate receptors (mGluRs), a target for anxiety disorders, and whether estradiol may modulate conflict-based anxiety in female rats by using the Vogel Conflict Test (VCT). We used ovariectomized female rats with high (OVX+EB) and low (OVX) estradiol levels and intact male rats to evaluate sex differences. Infusion of (S)-3,5-Dihydroxyphenylglycine (DHPG), a group I mGluR agonist, into the basolateral amygdala, a region involved in anxiety-responses, statistically increased the number of shocks in OVX, but not OVX+EB female rats at 0.1, nor at 1.0 μM. In contrast, DHPG statistically decreased the number of shocks in male rats at 1.0 μM only. DHPG (0.1 μM) increased the number of recoveries in OVX, but not OVX+EB or male rats. Sex differences were detected for the number of shocks, recoveries and punished licks, where female rats displayed more conflict than male rats. Western blot analyses showed that protein expression of mGluR1, but not mGluR5 was higher in OVX+EB>OVX>male rats in the amygdala, whereas no significant differences were detected in the hippocampus, olfactory bulb and/or the periaqueductal gray. Therefore, DHPG produced paradoxical effects that are sex dependent; producing anxiolytic-like effects in female rats, while anxiogenic-like effects in male rats according to the VCT. These results highlight the importance of including female experimental models to underpin the neural circuitry of anxiety according to sex and for the screening of novel anxiolytic compounds.
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Affiliation(s)
- María I De Jesús-Burgos
- Department of Biology, University of Puerto Rico, Cayey Campus, PO Box 372230, Cayey, PR 00737-2230, USA
| | | | - Yanira Cruz-Santa
- Department of Social Sciences, University of Puerto Rico, Cayey Campus, PO Box 372230, Cayey, PR 00737-2230, USA
| | - Nivia L Pérez-Acevedo
- Department of Anatomy and Neurobiology, School of Medicine, UPR-MSC, PO Box 365067, San Juan, PR 00936-5067, USA.
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15
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Qiu ZK, He JL, Liu X, Lai S, Ma JC, Zeng J, Li Y, Wu HW, Chen Y, Shen YG, Chen JS, Luo M. The role of allopregnanolone in the anxiolytic-like effect of free and easy wanderer plus (FEWP), a polyherbal preparation. Neurosci Lett 2015; 595:94-8. [PMID: 25800108 DOI: 10.1016/j.neulet.2015.03.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/10/2015] [Accepted: 03/19/2015] [Indexed: 12/08/2022]
Abstract
Anxiety disorders are the serious and burdensome psychiatric illnesses, which are closely correlated with allopregnanolone. The down-regulation of allopregnanolone biosynthesis has been implicated as the possible contributor to the aetiology of anxiety disorders. Free and easy wanderer plus (FEWP) is a well-known traditional Chinese medicine that had been shown to be effective in various mood disorders. The purpose of the present study was to evaluate the anxiolytic-like effect of FEWP and its association with the level of allopregnanolone in the brain. The animal behavioral tests were processed by the acute FEWP (2.5, 5 and 10mg/kg, p.o.) treatment. It had been shown that FEWP produced anxiolytic-like effects in behavioral models, including novelty suppressed feeding (5, 10mg/kg, p.o.), Vogel-type conflict test (10mg/kg, p.o.), elevated plus-maze test (5, 10mg/kg, p.o.). The animals were decapitated after the end of the behavioral tests and measured the allopregnanolone level of the prefrontal cortex and hippocampus by enzyme-linked immunosorbent assay (ELISA). The allopregnanolone level of the prefrontal cortex and hippocampus was increased by administration of FEWP (5, 10mg/kg, p.o.). Overall, these results indicated that FEWP exerts anxiolytic-like effects that were associated with the stiumlation of the allopregnanolone biosynthesis.
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Affiliation(s)
- Zhi-Kun Qiu
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Jia-Li He
- Department of Endocrinology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, PR China
| | - Xu Liu
- Pharmacy Department of General Hospital of Chinese People's Armed Police Forces, Beijing 100039, PR China
| | - Sha Lai
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Jian-Chun Ma
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Jia Zeng
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Yan Li
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Hong-Wei Wu
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Yong Chen
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Yong-Gang Shen
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China
| | - Ji-Sheng Chen
- Pharmaceutical Department of the First Affiliated Hospital of Guangdong Pharmaceutical University, Clinical Pharmacy Department of Guangdong Pharmaceutical University, Guangzhou 510080, PR China.
| | - Min Luo
- Department of Clinical Laboratory, Nanfang Hospital of Southern Medical University, Guangzhou 510515,PR China.
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16
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Testing the role of reward and punishment sensitivity in avoidance behavior: a computational modeling approach. Behav Brain Res 2015; 283:121-38. [PMID: 25639540 PMCID: PMC4351139 DOI: 10.1016/j.bbr.2015.01.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Revised: 01/12/2015] [Accepted: 01/20/2015] [Indexed: 01/27/2023]
Abstract
Exaggerated avoidance behavior is a predominant symptom in all anxiety disorders and its degree often parallels the development and persistence of these conditions. Both human and non-human animal studies suggest that individual differences as well as various contextual cues may impact avoidance behavior. Specifically, we have recently shown that female sex and inhibited temperament, two anxiety vulnerability factors, are associated with greater duration and rate of the avoidance behavior, as demonstrated on a computer-based task closely related to common rodent avoidance paradigms. We have also demonstrated that avoidance is attenuated by the administration of explicit visual signals during "non-threat" periods (i.e., safety signals). Here, we use a reinforcement-learning network model to investigate the underlying mechanisms of these empirical findings, with a special focus on distinct reward and punishment sensitivities. Model simulations suggest that sex and inhibited temperament are associated with specific aspects of these sensitivities. Specifically, differences in relative sensitivity to reward and punishment might underlie the longer avoidance duration demonstrated by females, whereas higher sensitivity to punishment might underlie the higher avoidance rate demonstrated by inhibited individuals. Simulations also suggest that safety signals attenuate avoidance behavior by strengthening the competing approach response. Lastly, several predictions generated by the model suggest that extinction-based cognitive-behavioral therapies might benefit from the use of safety signals, especially if given to individuals with high reward sensitivity and during longer safe periods. Overall, this study is the first to suggest cognitive mechanisms underlying the greater avoidance behavior observed in healthy individuals with different anxiety vulnerabilities.
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17
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Daviu N, Andero R, Armario A, Nadal R. Sex differences in the behavioural and hypothalamic-pituitary-adrenal response to contextual fear conditioning in rats. Horm Behav 2014; 66:713-23. [PMID: 25311689 DOI: 10.1016/j.yhbeh.2014.09.015] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 08/02/2014] [Accepted: 09/30/2014] [Indexed: 12/17/2022]
Abstract
In recent years, special attention is being paid to sex differences in susceptibility to disease. In this regard, there is evidence that male rats present higher levels of both cued and contextual fear conditioning than females. However, little is known about the concomitant hypothalamic-pituitary-adrenal (HPA) axis response to those situations which are critical in emotional memories. Here, we studied the behavioural and HPA responses of male and female Wistar rats to context fear conditioning using electric footshock as the aversive stimulus. Fear-conditioned rats showed a much greater ACTH and corticosterone response than those merely exposed to the fear conditioning chamber without receiving shocks. Moreover, males presented higher levels of freezing whereas HPA axis response was greater in females. Accordingly, during the fear extinction tests, female rats consistently showed less freezing and higher extinction rate, but greater HPA activation than males. Exposure to an open-field resulted in lower activity/exploration in fear-conditioned males, but not in females, suggesting greater conditioned cognitive generalization in males than females. It can be concluded that important sex differences in fear conditioning are observed in both freezing and HPA activation, but the two sets of variables are affected in the opposite direction: enhanced behavioural impact in males, but enhanced HPA responsiveness in females. Thus, the role of sex differences on fear-related stimuli may depend on the variables chosen to evaluate it, the greater responsiveness of the HPA axis in females perhaps being an important factor to be further explored.
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Affiliation(s)
- Núria Daviu
- Institut de Neurociències and Red de Transtornos Adictivos (RTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain; Animal Physiology (School of Biosciences), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain
| | - Raül Andero
- Institut de Neurociències and Red de Transtornos Adictivos (RTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain; Animal Physiology (School of Biosciences), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain
| | - Antonio Armario
- Institut de Neurociències and Red de Transtornos Adictivos (RTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain; Animal Physiology (School of Biosciences), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain.
| | - Roser Nadal
- Institut de Neurociències and Red de Transtornos Adictivos (RTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain; Psychobiology (School of Psychology), Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain.
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18
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Zhang LM, Zhao N, Guo WZ, Jin ZL, Qiu ZK, Chen HX, Xue R, Zhang YZ, Yang RF, Li YF. Antidepressant-like and anxiolytic-like effects of YL-IPA08, a potent ligand for the translocator protein (18 kDa). Neuropharmacology 2013; 81:116-25. [PMID: 24067925 DOI: 10.1016/j.neuropharm.2013.09.016] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 09/04/2013] [Accepted: 09/09/2013] [Indexed: 11/16/2022]
Abstract
It has been demonstrated that the translocator protein (18 kDa) (TSPO) plays an important role in stress-response and stress-related disorders, such as anxiety and depression, by affecting the production of neurosteroids, supporting the potential use of selective TSPO ligands as antidepressant or anxiolytic drugs. N-ethyl-N-(2-pyridinylmethyl)- 2-(3,4-ichlorophenyl)- 7-methylimidazo [1,2-a] pyridine-3-acetamide hydrochloride (YL-IPA08), a novel TSPO ligand that has been synthesized at our institute, exerted a high affinity for TSPO in a crude mitochondrial fraction prepared from rat cerebellum but exhibited only a negligible affinity for the central benzodiazepine receptor. As expected, YL-IPA08 incubation with the cultured rat astrocyte cells increased the pregnenolone and progesterone concentration from the cultured medium. Moreover, YL-IPA08 produced significant antidepressant-like and anxiolytic-like effects in a series of mouse and rat behavior models. In addition, the antidepressant-like behavior of YL-IPA08 was totally blocked by the TSPO antagonist PK11195 in a tail suspension test, and the anxiolytic effect was blocked by PK11195 but not by a CBR antagonist in the elevated plus-maze test. Furthermore, compared with the CBR agonist diazepam, YL-IPA08 had no myorelaxant effects and did not affect the motor coordination, memory or hexobarbitone-induced sleep in mice. Overall, these results indicate that YL-IPA08 is a more potent and selective TSPO ligand, which exerts antidepressant-like and anxiolytic-like effects on behaviors that are mediated by TSPO but does not cause the side effects that are typically associated with conventional benzodiazepines.
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Affiliation(s)
- Li-Ming Zhang
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - Nan Zhao
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - Wen-Zhi Guo
- Department of Anesthesiology, General Hospital of Beijing Military Command, Beijing 100007, China
| | - Zeng-Liang Jin
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - Zhi-Kun Qiu
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China; Department of Pharmacology, School of Pharmaceutical Sciences, Southern Medical University, 1023 Shatainan Road, Guangzhou, PR China
| | - Hong-Xia Chen
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - Rui Xue
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - You-Zhi Zhang
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China
| | - Ri-Fang Yang
- Department of Medicinal Chemistry, Beijing Institute of Pharmacology and Toxicology, Beijing, PR China
| | - Yun-Feng Li
- Department of New Drug Evaluation, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China.
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Deep brain stimulation affects conditioned and unconditioned anxiety in different brain areas. Transl Psychiatry 2013; 3:e289. [PMID: 23900312 PMCID: PMC3731788 DOI: 10.1038/tp.2013.56] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 05/25/2013] [Indexed: 12/14/2022] Open
Abstract
Deep brain stimulation (DBS) of the nucleus accumbens (NAc) has proven to be an effective treatment for therapy refractory obsessive-compulsive disorder. Clinical observations show that anxiety symptoms decrease rapidly following DBS. As in clinical studies different regions are targeted, it is of principal interest to understand which brain area is responsible for the anxiolytic effect and whether high-frequency stimulation of different areas differentially affect unconditioned (innate) and conditioned (learned) anxiety. In this study, we examined the effect of stimulation in five brain areas in rats (NAc core and shell, bed nucleus of the stria terminalis (BNST), internal capsule (IC) and the ventral medial caudate nucleus (CAU)). The elevated plus maze was used to test the effect of stimulation on unconditioned anxiety, the Vogel conflict test for conditioned anxiety, and an activity test for general locomotor behaviour. We found different anxiolytic effects of stimulation in the five target areas. Stimulation of the CAU decreased both conditioned and unconditioned anxiety, while stimulation of the IC uniquely reduced conditioned anxiety. Remarkably, neither the accumbens nor the BNST stimulation affected conditioned or unconditioned anxiety. Locomotor activity increased with NAc core stimulation but decreased with the BNST. These findings suggest that (1) DBS may have a differential effect on unconditioned and conditioned anxiety depending on the stimulation area, and that (2) stimulation of the IC exclusively reduces conditioned anxiety. This suggests that the anxiolytic effects of DBS seen in OCD patients may not be induced by stimulation of the NAc, but rather by the IC.
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20
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Tenk CM, Kavaliers M, Ossenkopp K. Neonatal treatment with lipopolysaccharide differentially affects adult anxiety responses in the light–dark test and taste neophobia test in male and female rats. Int J Dev Neurosci 2012; 31:171-80. [DOI: 10.1016/j.ijdevneu.2012.12.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 12/21/2012] [Accepted: 12/21/2012] [Indexed: 11/24/2022] Open
Affiliation(s)
- Christine M. Tenk
- Department of PsychologyBrescia University CollegeLondonONCanadaN6G 1H2
| | - Martin Kavaliers
- Neuroscience Program and Department of PsychologyWestern UniversityLondonONCanadaN6A 5C2
| | - Klaus‐Peter Ossenkopp
- Neuroscience Program and Department of PsychologyWestern UniversityLondonONCanadaN6A 5C2
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21
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Abstract
This paper is the thirty-fourth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2011 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, Flushing, NY 11367, United States.
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22
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Taiwo AE, Leite FB, Lucena GM, Barros M, Silveira D, Silva MV, Ferreira VM. Anxiolytic and antidepressant-like effects of Melissa officinalis (lemon balm) extract in rats: Influence of administration and gender. Indian J Pharmacol 2012; 44:189-92. [PMID: 22529473 PMCID: PMC3326910 DOI: 10.4103/0253-7613.93846] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 09/12/2011] [Accepted: 12/16/2011] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To analyse the behavioral effects of Melissa officinalis extract in rats following acute or subacute treatment. MATERIALS AND METHODS The behavioral effects of an acute or subacute (10-day course) orally administered M. officinalis (MO; 0, 30, 100 or 300 mg/kg) ethanol extract were evaluated in male and female Wistar rats in elevated plus-maze (EPM), forced swimming (FS) and open field (OF) tests. The effects of diazepam (DZP; 1 mg/kg) and fluoxetine (FXT; 10 mg/kg) were also assessed. RESULTS In the EPM test, the percentage of open arm entries and open arm times of both males and females given the subacute M. officinalis ethanol extract were significantly higher than those of the vehicle-treated animals but were at levels similar to those observed in the DZP group, regardless of the treatment length. In the FS test, immobility duration was significantly lower in both males and females treated with the plant extract when compared to vehicle-treated counterparts. A 10-day treatment with FXT induced the same antidepressant response, regardless of gender, and was more effective than the M. officinalis extract. Male and female rats demonstrated distinct gender profiles, and treatment × gender interactions were observed. Locomotion in the EPM and OF tests was not significantly altered by treatments. CONCLUSION The potential psychoactive properties of M. officinalis may provide a unique pharmacological alternative for certain psychiatric disorders; however, the efficacy appears to be dependent on both gender and administration length.
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Affiliation(s)
- Adefunmilayo E Taiwo
- Faculdade de Ciências da Saúde, Programa de Pós Graduação em Ciências da Saúde, Universidade de Brasília (UnB), 70910-900, DF, Brazil
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Goeldner C, Spooren W, Wichmann J, Prinssen EP. Further characterization of the prototypical nociceptin/orphanin FQ peptide receptor agonist Ro 64-6198 in rodent models of conflict anxiety and despair. Psychopharmacology (Berl) 2012; 222:203-14. [PMID: 22249359 DOI: 10.1007/s00213-012-2636-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 12/30/2011] [Indexed: 12/18/2022]
Abstract
RATIONALE Ro 64-6198, the prototypical non-peptide nociceptin/orphanin FQ peptide (NOP) receptor agonist, has potent anxiolytic-like effects in several preclinical models and species. However the effects of Ro 64-6198 on distinctive anxiety-provoking conditions related to unconditioned conflict behavior as well as its role in despair-like behavior remain to be addressed. OBJECTIVE Here we examined the effects of Ro 64-6198 on unconditioned conflict anxiety using stimuli with different salience and on regulation of autonomic reactivity and compared these to the effects of benzodiazepine receptor agonists. We also addressed the potential effects of Ro 64-6198 on despair-like behavior. MATERIALS AND METHODS Ro 64-6198 (0.1 to 10 mg/kg i.p.) and either diazepam or chlordiazepoxide were tested in the Vogel conflict punished drinking test (VCT) in Sprague Dawley rats, in the social approach-avoidance (SAA) test in Lewis rats, in the novelty-induced hypophagia (NIH) in C57BL/6J mice, and in stress-induced hyperthermia in NMRI mice, as well as in the forced swim test (FST) in Sprague Dawley rats and the tail suspension test (TST) in C57BL/6J mice. RESULTS Ro 64-6198 (0.3 to 3 mg/kg) dose-dependently produced anxiolytic-like effects in the VCT, SAA, NIH, and SIH, similar to benzodiazepine receptor agonists. Ro 64-6198 did not alter immobility time in the FST and TST. CONCLUSIONS Ro 64-6198 produced marked anxiolytic-like effects in response to a variety of mild to strong anxiogenic stimuli, whereas it did not facilitate depression-related behaviors. This data extend previous literature suggesting that NOP receptors are a viable target for the treatment of anxiety disorders.
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Affiliation(s)
- Celia Goeldner
- CNS Research, CNS Discovery, pRED, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, CH-4070 Basel, Switzerland
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Melo TG, Izídio GS, Ferreira LS, Sousa DS, Macedo PT, Cabral A, Ribeiro AM, Silva RH. Antidepressants differentially modify the extinction of an aversive memory task in female rats. Prog Neuropsychopharmacol Biol Psychiatry 2012; 37:33-40. [PMID: 22310225 DOI: 10.1016/j.pnpbp.2012.01.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 01/23/2012] [Accepted: 01/23/2012] [Indexed: 12/19/2022]
Abstract
Treatment of major depression, posttraumatic stress disorder and other psychopathologies with antidepressants can be associated with improvement of the cognitive deficits related to these disorders. Although the mechanisms of these effects are not completely elucidated, alterations in the extinction of aversive memories are believed to play a role in these psychopathologies. We have recently verified that female rats present low levels of extinction when submitted to the plus-maze discriminative avoidance task. In the present study, female rats were treated long term with clinically used antidepressants (fluoxetine, nortriptyline or mirtazapine) and subjected to the plus-maze discriminative avoidance task to evaluate learning, memory, extinction and anxiety-related behaviors as well as behavioral despair in the forced swimming test. All groups learned the task and exhibited retrieval. Chronic treatment with fluoxetine (but not with the other antidepressants tested) increased extinction of the discriminative task. In the forced swimming test, the animals treated with fluoxetine and mirtazapine showed decreased immobility duration. In conclusion, fluoxetine potentiated extinction, while both fluoxetine and mirtazapine were effective in ameliorating depressive-like behavior in the forced swimming test, suggesting a possible dissociation between the effects on mood and the extinction of aversive memories in female rats.
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Affiliation(s)
- Thieza G Melo
- Memory Studies Laboratory, Physiology Department, Federal University of Rio Grande of Norte, Natal, Brazil
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25
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Parent AJ, Beaudet N, Beaudry H, Bergeron J, Bérubé P, Drolet G, Sarret P, Gendron L. Increased anxiety-like behaviors in rats experiencing chronic inflammatory pain. Behav Brain Res 2012; 229:160-7. [PMID: 22245257 DOI: 10.1016/j.bbr.2012.01.001] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 11/29/2011] [Accepted: 01/02/2012] [Indexed: 01/01/2023]
Abstract
For many patients, chronic pain is often accompanied, and sometimes amplified, by co-morbidities such as anxiety and depression. Although it represents important challenges, the establishment of appropriate preclinical behavioral models contributes to drug development for treating chronic inflammatory pain and associated psychopathologies. In this study, we investigated whether rats experiencing persistent inflammatory pain induced by intraplantar injection of complete Freund's adjuvant (CFA) developed anxiety-like behaviors, and whether clinically used analgesic and anxiolytic drugs were able to reverse CFA-induced anxiety-related phenotypes. These behaviors were evaluated over 28 days in both CFA- and saline-treated groups with a variety of behavioral tests. CFA-induced mechanical allodynia resulted in increased anxiety-like behaviors as evidenced by: (1) a significant decrease in percentage of time spent and number of entries in open arms of the elevated-plus maze (EPM), (2) a decrease in number of central squares visited in the open field (OF), and (3) a reduction in active social interactions in the social interaction test (SI). The number of entries in closed arms in the EPM and the distance traveled in the OF used as indicators of locomotor performance did not differ between treatments. Our results also reveal that in CFA-treated rats, acute administration of morphine (3mg/kg, s.c.) abolished tactile allodynia and anxiety-like behaviors, whereas acute administration of diazepam (1mg/kg, s.c) solely reversed anxiety-like behaviors. Therefore, pharmacological treatment of anxiety-like behaviors induced by chronic inflammatory pain can be objectively evaluated using multiple behavioral tests. Such a model could help identify/validate alternative potential targets that influence pain and cognitive dimensions of anxiety.
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Affiliation(s)
- Alexandre J Parent
- Department of Physiology and Biophysics, Faculty of Medicine and Health Sciences, Institut de pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, QC, Canada
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Aupperle RL, Sullivan S, Melrose AJ, Paulus MP, Stein MB. A reverse translational approach to quantify approach-avoidance conflict in humans. Behav Brain Res 2011; 225:455-63. [PMID: 21843556 DOI: 10.1016/j.bbr.2011.08.003] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 07/29/2011] [Accepted: 08/01/2011] [Indexed: 01/17/2023]
Abstract
Animal approach-avoidance conflict paradigms have been used extensively to characterize effects of anxiolytic agents and probe neural circuitry related to anxiety. However, there are few behavioral approaches to measure conflict in human populations, limiting the translation of findings from animal conflict tasks to human clinical research. We developed a novel approach-avoidance conflict (AAC) paradigm involving situations in which the same decision is associated with "reward" (points) and "punishment" (negative affective stimuli). The AAC task was completed by 95 young adults (56 female) with varying levels of self-reported trait anxiety. As expected, conflict-related approach behavior correlated with self-reported motivation to approach reward and avoid punishment and greater reward level increased approach behavior. Additionally, females exhibited less approach behavior than males. Anxiety Sensitivity Index (Physical subscale) scores related negatively to approach behavior for males, while Behavioral Activation Scale (BAS, Fun Seeking subscale) scores related positively to approach behavior for females. Results support the utility of the AAC task as a behavioral test that has strong reverse translational features. Findings indicate that approach drives and anxiety sensitivity may be important in determining conflict behavior for females and males respectively. The approach-avoidance conflict task offers a novel, translational measure to probe neural systems underlying conflict behavior, motivational processes, and anxiety disorders.
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Affiliation(s)
- Robin L Aupperle
- Department of Psychiatry, University of California-San Diego, 9500 Gilman Drive, MC: 0603 La Jolla 92093-0603, CA, USA.
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