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Santos-Carrasco D, De la Casa LG. Stressing out! Effects of acute stress on prepulse inhibition and working memory. Psychophysiology 2024:e14599. [PMID: 38691020 DOI: 10.1111/psyp.14599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024]
Abstract
Prepulse inhibition (PPI) of the startle reflex serves as a pre-cognitive marker of sensorimotor gating, and its deficit may predict cognitive impairments. Startle reflex is modulated by many factors. Among them, stress has been a topic of interest, but its effects on both pre-cognitive and cognitive variables continue to yield divergent results. This study aims to analyze the effect of acute stress on PPI of the startle reflex and cognitive function (working memory, attention, inhibition, and verbal fluency). Participants were exposed to the MAST stress induction protocol or a stress-neutral task: stress group (n = 54) or control group (n = 54). Following stress induction, participants' startle responses were recorded, and cognition was assessed. The results revealed that participants in the stress group exhibited greater startle magnitude, lower PPI, and lower scores in working memory tests compared with the control group. Additionally, a correlation was found between working memory and PPI across all the participants, independent of stress group. These findings support the notion that after stress, both greater startle magnitude and diminished PPI could play an adaptive role by allowing for increased processing of stimuli potentially dangerous and stress-related. Similarly, our results lend support to the hypothesis that lower PPI may be predictive of cognitive impairment. Considering the impact of stress on both pre-cognitive (PPI) and cognitive (working memory) variables, we discuss the possibility that the effect of stress on PPI occurs through motivational priming and emphasize the relevance of considering stress in both basic and translational science.
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Li Z, Gao Z, Chang C, Gao Z. Anticonvulsive Effect of Glucosyl Xanthone Mangiferin on Pentylenetetrazol (PTZ)-Induced Seizure-Provoked Mice. Appl Biochem Biotechnol 2024; 196:2161-2175. [PMID: 37486538 DOI: 10.1007/s12010-023-04651-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2023] [Indexed: 07/25/2023]
Abstract
Anxiety and depression are major side effects induced by currently available antiepileptic drugs; apart from this, they also diminish intelligence and language skills which cause hepatic failure, anemia, etc. Hence, in this study, we assessed antiepileptic effect of a phytochemical mangiferin. Epilepsy, a prevalent non communicable neurological disorder, affects infants and older population throughout the world. Epilepsy-induced comorbidities are more severe and if not treated cautiously lead to disability and even worse cases, mortality. The onset and duration of convulsion were observed. Seizure severity score was assessed by provoking kindling with 35 mg/kg PTZ. Prooxidants and antioxidants were measured to assess the antioxidant effect of mangiferin. Inflammatory markers were measured to determine the anti-inflammatory effect of mangiferin. The levels of neurotransmitters and ATPases were quantified to evaluate the neuroprotective effect of mangiferin. Mangiferin significantly decreased the onset and duration convulsion. It also decreased the seizure severity score, locomotor activity, and immobilization effectively. The excitatory neurotransmitter was reduced, and inhibitory neurotransmitter was increased in mice treated with mangiferin. Overall, our results confirm that mangiferin efficiently protects mice from PTZ-induced seizures. It can be subjected to further research to be prescribed as a potent antiepileptic drug.
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Affiliation(s)
- Zhaoxia Li
- Department of Pediatric, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China
| | - Zhiliang Gao
- Department of Pediatric, Binzhou Hospital of Traditional Chinese Medicine, Binzhou, 256600, China
| | - Cong Chang
- Department of Rehabilitation Medicine, Binzhou Municipal Hospital, Binzhou, 256600, China
| | - Zhuanglei Gao
- Department of Gastrointestinal Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, China.
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Speck ML, Gomes ALA, Rojas CS, Willig JB, Herrmann AP, Pilger DA, Rates SMK. Environmental enrichment affects behavioral and pharmacological response to antidepressants in CF1 mice. Neurosci Lett 2023; 813:137432. [PMID: 37549865 DOI: 10.1016/j.neulet.2023.137432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/31/2023] [Accepted: 08/04/2023] [Indexed: 08/09/2023]
Abstract
It has been described that environmental enrichment (EE) exerts beneficial effects on cognitive and emotional performances, dendritic branching, synaptic density, neurogenesis and modulation of neurotrophic systems and neurotransmitters in rodents. However, the influence of EE on pharmacological and behavioral responses in animal models of psychiatric disorders has not been fully established. In this context, the aim of this study was to evaluate the influence of exposure to EE on mice behavior in the open field test (OFT) and forced swimming tests (FST), as well as the response to antidepressant drugs (fluoxetine 30 mg/kg and bupropion 30 mg/kg, p.o.). CF1 mice were exposed to an enriched housing condition at different developmental stages: from mating to postnatal day (PND) 55 (lifelong enrichment), from mating to PND21 (perinatal enrichment) and from PND21 to PND55 (post-weaning enrichment). At PND58 the male offspring were evaluated in the OFT and FST. BDNF gene expression in the hippocampus was determined through qPCR. Mice exposed to perinatal enrichment remained longer in the peripheral zone of the OFT and performed fewer grooming than mice housed under standard condition, and these effects were independent of drug treatment. Post-weaning and lifelong enrichment increased grooming behavior. Bupropion reduced grooming in all groups except in perinatal enriched. In turn, fluoxetine decreased grooming only in post-weaning enriched group. None of the enriched housing conditions altered the immobility time in the FST, which indicates that EE had no antidepressant-like effect. However, all enriched housing conditions abolished the anti-immobility effect of bupropion. None of the EE protocols affected BDNF hippocampal expression. The main conclusion is that mice behavior in the OFT is sensitive to alterations in the housing environment and depends on the developmental stage of exposure. Bupropion and fluoxetine yielded divergent responses depending on the housing condition, which suggests that EE modulates monoaminergic neurotransmission pathways.
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Affiliation(s)
- Marta Lorena Speck
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil
| | - Ana Luiza Azevedo Gomes
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil
| | - Camila Schafer Rojas
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil
| | - Julia Biz Willig
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil
| | - Ana Paula Herrmann
- Graduate Program in Biological Sciences: Pharmacology and Therapeutics. Federal University of: Rio Grande do Sul. Rua Ramiro Barcelos, 2600, Porto Alegre, RS ZIP CODE 90035003, Brazil.
| | - Diogo André Pilger
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil.
| | - Stela Maris Kuze Rates
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul. Avenida Ipiranga, 2752, Porto Alegre, RS ZIP CODE 90610000, Brazil.
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Melanson B, Leri F. Effect of ketamine on the physiological responses to combined hypoglycemic and psychophysical stress. IBRO Neurosci Rep 2021; 11:81-87. [PMID: 34485972 PMCID: PMC8406162 DOI: 10.1016/j.ibneur.2021.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/20/2021] [Indexed: 12/01/2022] Open
Abstract
There is evidence that hypoglycemic stress can interact with other stressors, and that ketamine can mitigate the impact of these stressors on behavior and physiology. The current study in male Sprague-Dawley rats investigated whether pre-treatment with 0, 10, or 20 mg/kg ketamine could modulate the interaction between hypoglycemia induced by 0 or 300 mg/kg 2-deoxy-D-glucose (2-DG) and the psychophysical stress of forced swimming (FSS; 6 sessions, 10 min/session) on serum concentrations of corticosterone (CORT) and the pro-inflammatory cytokine, tumor necrosis factor (TNF)-α. It was found that 2-DG enhanced the CORT response to an initial session of FSS, and this effect dissipated after multiple sessions. More importantly, animals displayed significantly higher levels of CORT and lower levels of TNF-α in response to a drug-free test swim conducted 1 week after exposure to the combined stressors, and these responses were not observed in rats that were pre-treated with ketamine. Overall, these findings indicate that ketamine has the potential to reduce the negative impact of interacting stressors on the biological reactivity of the hypothalamic-pituitary-adrenal axis and the immune system.
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Affiliation(s)
- Brett Melanson
- Department of Psychology and Collaborative Neuroscience, Program University of Guelph, Guelph, ON, Canada
| | - Francesco Leri
- Department of Psychology and Collaborative Neuroscience, Program University of Guelph, Guelph, ON, Canada
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Du W, Li M, Zhou H, Shao F, Wang W. Alteration of the PKA-CREB cascade in the mPFC accompanying prepulse inhibition deficits: evidence from adolescent social isolation and chronic SKF38393 injection during early adolescence. Behav Pharmacol 2021; 32:487-496. [PMID: 34148969 DOI: 10.1097/fbp.0000000000000643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Prepulse inhibition (PPI) refers to the inhibition of the startle reflex that occurs when the startling stimulus is preceded by a weak prestimulus. Altered adolescent mPFC circuitry induced by early-life adversity might be a key source of PPI deficits. The current study focused on variations in the cyclic AMP (cAMP)/protein kinase A (PKA)-cAMP-response element-binding protein (CREB) pathway in the medial prefrontal cortex (mPFC). We found a negative relationship between PPI and the PKA-CREB cascade during adolescence by employing both developmental and pharmacologic manipulations. Experiment 1, with the early adolescent social isolation model [postnatal days (PNDs), 21-34), displayed a disrupted PPI at PND 35 and significantly altered PKA, phosphorylated CREB (p-CREB) and the ratio of p-CREB to CREB. In particular, the level of p-CREB was negatively related to PPI performance. In Experiment 2, SKF38393, a well-characterized activator of adenylate cyclase and cAMP/PKA, was chronically injected during early adolescence (PNDs 28-34). We sought to mimic potential biochemical changes, particularly PKA activation, which is possibly altered by adolescent social isolation, and to determine if PPI was disrupted, similar to the disruption associated with adolescent social isolation. On PND 35, PPI deficits were detected, as well as increased PKA, marginally increased CREB and no change occurred in p-CREB or the ratio of p-CREB to CREB. In particular, PKA activity was negatively related to PPI performance. Although these results are limited in suggesting a causal link between PPI deficits and PKA-CREB signaling, they may help to elucidate the role played by PKA-CREB in the mPFC in regulating PPI.
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Affiliation(s)
- Wei Du
- School of Psychological and Cognitive Science, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing
| | - Man Li
- Key Research Base of Humanities and Social Sciences of the Ministry of Education, Academy of Psychology and Behavior, Tianjin Normal University
- Faculty of Psychology, Tianjin Normal University
- Tianjin Social Science Laboratory of Students' Mental Development and Learning, Tianjin
| | - Hao Zhou
- School of Psychological and Cognitive Science, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing
| | - Feng Shao
- School of Psychological and Cognitive Science, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing
| | - Weiwen Wang
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences
- The University of Chinese Academy of Sciences, Beijing, China
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Melanson B, Lapointe T, Leri F. Impact of impaired glucose metabolism on responses to a psychophysical stressor: modulation by ketamine. Psychopharmacology (Berl) 2021; 238:1005-1015. [PMID: 33404733 DOI: 10.1007/s00213-020-05748-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 12/08/2020] [Indexed: 12/11/2022]
Abstract
RATIONALE There is evidence that hypoglycemia, a metabolic stressor, can negatively impact mood and motivation, and can interact with other stressors to potentiate their effects on behavior and physiology. OBJECTIVES/METHODS The current study in male Sprague-Dawley rats explored the interaction between impaired glucose metabolism induced by 0, 200, or 300 mg/kg 2-deoxy-D-glucose (2-DG) and a psychophysical stressor induced by forced swimming stress (FSS; 6 sessions, 10 min/session). The endpoints of interest were blood glucose levels, progressive behavioral immobility, and saccharin preference (2-bottle choice test). Furthermore, it was investigated whether pre-treatment with 0, 10, or 20 mg/kg ketamine could modify the interaction between 2-DG and FSS on these endpoints. RESULTS It was found that 2-DG increased blood glucose levels equally in all experimental groups, accelerated the immobile response to FSS, and suppressed saccharin preference 1 week following termination of stress exposure. As well, pre-treatment with ketamine blocked the effects of combined 2-DG and FSS on immobility and saccharin preference without affecting blood glucose levels and produced an anti-immobility effect that was observed during a drug-free test swim 1 week following administration. CONCLUSIONS Overall, these findings demonstrate that impaired glucose metabolism can potentiate the effects of a psychophysical stressor, and that this interaction can be modulated pharmacologically by ketamine.
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Affiliation(s)
- Brett Melanson
- Department of Psychology and Collaborative Neuroscience Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Thomas Lapointe
- Department of Psychology and Collaborative Neuroscience Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Francesco Leri
- Department of Psychology and Collaborative Neuroscience Program, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
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Borsoi M, Nunes LED, Barbosa AR, Lima MS, Medeiros I, Pranke MA, Antonio CB, Rates SMK, Neves GA. Intermittent repeated stress but not ketamine changes mice response to antidepressants. Neurosci Lett 2020; 741:135452. [PMID: 33166638 DOI: 10.1016/j.neulet.2020.135452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 12/19/2022]
Abstract
Discovery of the rapid antidepressant effect of ketamine has been considered one of the most important advances in major depressive disorder treatment. Several studies report a significant benefit to patients that lasts up to 19 days after treatment. However, concerns arise from the long-term use of ketamine, thus a safe and effective strategy for maintaining its antidepressant effect is still necessary. To this end, our work assessed the effects of imipramine and fluoxetine after repeated ketamine treatment in male mice. Ketamine (30 mg/kg/day for 14 days) induced an anti-immobility effect in the forced swimming (FS) paradigm, detected 1 and 3 days after treatment. Seven days after the last ketamine injection, mice received imipramine (20 mg/kg) or fluoxetine (30 mg/kg). Imipramine and fluoxetine did not change mice's immobility time, regardless of the pre-treatment (saline or ketamine). Since both drugs' anti-immobility effect was demonstrated in the classical FS test, we can assume that repeated exposure to intermittent stress inhibited the antidepressant drugs' anti-immobility effects. Moreover, pre-exposure to ketamine did not counteract stress-induced changes in mice response to antidepressants. Since exposure to forced swim and i.p. injections are stressful to rodents, each stressor's contribution to the blunted response to antidepressants was investigated. Our data demonstrated that both stressors (FS and i.p. injections) influenced the reported effect. In summary, our results showed that exposure to intermittent repeated stress inhibited the anti-immobility effect of imipramine and fluoxetine in mice and corroborated findings demonstrating that exposure to stress can blunt patients' response to antidepressants.
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Affiliation(s)
- Milene Borsoi
- Laboratory of Experimental Psychopharmacology, School of Pharmacy, Federal University of Rio Grande do Sul, Av. Ipiranga 2752, sala 503-B, Porto Alegre, RS, CEP 90610-000, Brazil
| | - Luis Eduardo D Nunes
- Laboratory of Molecular Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco J, sala J1-029, Rio de Janeiro, RJ, CEP 21941-902, Brazil
| | - Amanda R Barbosa
- Laboratory of Molecular Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco J, sala J1-029, Rio de Janeiro, RJ, CEP 21941-902, Brazil
| | - Mariana S Lima
- Laboratory of Molecular Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco J, sala J1-029, Rio de Janeiro, RJ, CEP 21941-902, Brazil
| | - Isabelle Medeiros
- Laboratory of Molecular Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco J, sala J1-029, Rio de Janeiro, RJ, CEP 21941-902, Brazil
| | - Mariana A Pranke
- Laboratory of Experimental Psychopharmacology, School of Pharmacy, Federal University of Rio Grande do Sul, Av. Ipiranga 2752, sala 503-B, Porto Alegre, RS, CEP 90610-000, Brazil
| | - Camila B Antonio
- Laboratory of Experimental Psychopharmacology, School of Pharmacy, Federal University of Rio Grande do Sul, Av. Ipiranga 2752, sala 503-B, Porto Alegre, RS, CEP 90610-000, Brazil
| | - Stela M K Rates
- Laboratory of Experimental Psychopharmacology, School of Pharmacy, Federal University of Rio Grande do Sul, Av. Ipiranga 2752, sala 503-B, Porto Alegre, RS, CEP 90610-000, Brazil
| | - Gilda A Neves
- Laboratory of Experimental Psychopharmacology, School of Pharmacy, Federal University of Rio Grande do Sul, Av. Ipiranga 2752, sala 503-B, Porto Alegre, RS, CEP 90610-000, Brazil; Laboratory of Molecular Pharmacology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, bloco J, sala J1-029, Rio de Janeiro, RJ, CEP 21941-902, Brazil.
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PT-31, a putative α2-adrenoceptor agonist, is effective in schizophrenia cognitive symptoms in mice. Behav Pharmacol 2019; 30:574-587. [DOI: 10.1097/fbp.0000000000000494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mondal AC, Fatima M. Direct and indirect evidences of BDNF and NGF as key modulators in depression: role of antidepressants treatment. Int J Neurosci 2018; 129:283-296. [PMID: 30235967 DOI: 10.1080/00207454.2018.1527328] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
PURPOSE Depression is one of the most prevalent, recurrent and life-threatening mental illnesses. However, the precise mechanism underlying the disorder is not yet clearly understood. It is therefore, essential to identify the novel biomarkers which may help in the development of effective treatment. METHODS In this milieu, the profile of the brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) were considered as biomarkers in the light of pathophysiology of depression and its treatment. RESULTS Previously, we have reported that BDNF level in the postmortem brain of suicide victims was significantly lower than those of normal controls. We also found decreased BDNF levels in the specific brain regions of the learned helplessness model of depression in rat, and was found to increase normal level following chronic fluoxetine hydrochloride treatment. NGF is another important member of neurotrophin, which is dysregulated in the pathophysiology of depression in some models of peripheral nerve damage and stress. The results shown evidences of the effect of antidepressants on modulating depression via the NGF in preclinical and clinical models of depression, but conflicted, therefore make it currently difficult to affirm the therapeutic role of antidepressants. CONCLUSIONS Here, we review some of the preclinical and clinical studies aimed at disclosing the role of BDNF and NGF mediated pathophysiological mechanisms of depression and the new therapeutic approaches targeting those key molecules. In addition, an important link between BDNF, NGF and depression has been discussed in the light of current existing knowledge.
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Affiliation(s)
- Amal Chandra Mondal
- a Laboratory of Cellular and Molecular Neurobiology , School of Life Sciences, Jawaharlal Nehru University , New Delhi , India
| | - Mahino Fatima
- a Laboratory of Cellular and Molecular Neurobiology , School of Life Sciences, Jawaharlal Nehru University , New Delhi , India
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Takai Y, Kawai M, Ogo T, Ichinose T, Furuya S, Takaki N, Tone Y, Udo H, Furuse M, Yasuo S. Early-life Photoperiod Influences Depression-like Behavior, Prepulse Inhibition of the Acoustic Startle Response, and Hippocampal Astrogenesis in Mice. Neuroscience 2018; 374:133-143. [DOI: 10.1016/j.neuroscience.2018.01.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 01/18/2018] [Indexed: 10/18/2022]
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Sild M, Ruthazer ES, Booij L. Major depressive disorder and anxiety disorders from the glial perspective: Etiological mechanisms, intervention and monitoring. Neurosci Biobehav Rev 2017; 83:474-488. [DOI: 10.1016/j.neubiorev.2017.09.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/08/2017] [Accepted: 09/11/2017] [Indexed: 12/12/2022]
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Chronic stress exacerbates neuropathic pain via the integration of stress-affect-related information with nociceptive information in the central nucleus of the amygdala. Pain 2017; 158:717-739. [PMID: 28225710 DOI: 10.1097/j.pain.0000000000000827] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Exacerbation of pain by chronic stress and comorbidity of pain with stress-related psychiatric disorders, including anxiety and depression, represent significant clinical challenges. However, the underlying mechanisms still remain unclear. Here, we investigated whether chronic forced swim stress (CFSS)-induced exacerbation of neuropathic pain is mediated by the integration of stress-affect-related information with nociceptive information in the central nucleus of the amygdala (CeA). We first demonstrated that CFSS indeed produces both depressive-like behaviors and exacerbation of spared nerve injury (SNI)-induced mechanical allodynia in rats. Moreover, we revealed that CFSS induces both sensitization of basolateral amygdala (BLA) neurons and augmentation of long-term potentiation (LTP) at the BLA-CeA synapse and meanwhile, exaggerates both SNI-induced sensitization of CeA neurons and LTP at the parabrachial (PB)-CeA synapse. In addition, we discovered that CFSS elevates SNI-induced functional up-regulation of GluN2B-containing NMDA (GluN2B-NMDA) receptors in the CeA, which is proved to be necessary for CFSS-induced augmentation of LTP at the PB-CeA synapse and exacerbation of pain hypersensitivity in SNI rats. Suppression of CFSS-elicited depressive-like behaviors by antidepressants imipramine or ifenprodil inhibits the CFSS-induced exacerbation of neuropathic pain. Collectively, our findings suggest that CFSS potentiates synaptic efficiency of the BLA-CeA pathway, leading to the activation of GluN2B-NMDA receptors and sensitization of CeA neurons, which subsequently facilitate pain-related synaptic plasticity of the PB-CeA pathway, thereby exacerbating SNI-induced neuropathic pain. We conclude that chronic stress exacerbates neuropathic pain via the integration of stress-affect-related information with nociceptive information in the CeA.
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Neves G, Borsoi M, Antonio CB, Pranke MA, Betti AH, Rates SMK. Is Forced Swimming Immobility a Good Endpoint for Modeling Negative Symptoms of Schizophrenia? - Study of Sub-Anesthetic Ketamine Repeated Administration Effects. AN ACAD BRAS CIENC 2017; 89:1655-1669. [PMID: 28832723 DOI: 10.1590/0001-3765201720160844] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/16/2017] [Indexed: 11/21/2022] Open
Abstract
Immobility time in the forced swimming has been described as analogous to emotional blunting or apathy and has been used for characterizing schizophrenia animal models. Several clinical studies support the use of NMDA receptor antagonists to model schizophrenia in rodents. Some works describe the effects of ketamine on immobility behavior but there is variability in the experimental design used leading to controversial results. In this study, we evaluated the effects of repeated administration of ketamine sub-anesthetic doses in forced swimming, locomotion in response to novelty and novel object recognition, aiming a broader evaluation of the usefulness of this experimental approach for modeling schizophrenia in mice. Ketamine (30 mg/kg/day i.p. for 14 days) induced a not persistent decrease in immobility time, detected 24h but not 72h after treatment. This same administration protocol induced a deficit in novel object recognition. No change was observed in mice locomotion. Our results confirm that repeated administration of sub-anesthetic doses of ketamine is useful in modeling schizophrenia-related behavioral changes in mice. However, the immobility time during forced swimming does not seem to be a good endpoint to evaluate the modeling of negative symptoms in NMDAR antagonist animal models of schizophrenia.
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Affiliation(s)
- Gilda Neves
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Milene Borsoi
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Camila B Antonio
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Mariana A Pranke
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Andresa H Betti
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
| | - Stela M K Rates
- Laboratório de Psicofarmacologia Experimental, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil
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Participation of hippocampal nitric oxide synthase and soluble guanylate cyclase in the modulation of behavioral responses elicited by the rat forced swimming test. Behav Pharmacol 2017; 28:19-29. [DOI: 10.1097/fbp.0000000000000263] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Takahashi K, Maejima H, Ikuta G, Mani H, Asaka T. Exercise combined with low-level GABAA receptor inhibition up-regulates the expression of neurotrophins in the motor cortex. Neurosci Lett 2017; 636:101-107. [DOI: 10.1016/j.neulet.2016.10.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 10/17/2016] [Accepted: 10/26/2016] [Indexed: 12/11/2022]
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Cummins ED, Leedy KK, Dose JM, Peterson DJ, Kirby SL, Hernandez LJ, Brown RW. The effects of adolescent methylphenidate exposure on the behavioral and brain-derived neurotrophic factor response to nicotine. J Psychopharmacol 2017; 31:75-85. [PMID: 27940499 DOI: 10.1177/0269881116681458] [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] [Indexed: 11/17/2022]
Abstract
This study analyzed the interaction of adolescent methylphenidate on the behavioral response to nicotine and the effects of these drug treatments on brain-derived neurotrophic factor in the nucleus accumbens and hippocampus in male and female Sprague-Dawley rats. Animals were intraperitoneal administered 1 mg/kg methylphenidate or saline using a "school day" regimen (five days on, two days off) beginning on postnatal day (P)28 and throughout behavioral testing. In Experiment 1, animals were intraperitoneal administered 0.5 mg/kg (free base) nicotine or saline every second day for 10 days from P45-P63 and tested after a three-day drug washout on the forced swim stress task on P67-P68. Results revealed that adolescent methylphenidate blunted nicotine behavioral sensitization. However, methylphenidate-treated rats given saline during sensitization demonstrated decreased latency to immobility and increased immobility time on the forced swim stress task in males that was reduced by nicotine. In Experiment 2, a different set of animals were conditioned to nicotine (0.6 mg/kg free base) or saline using the conditioned place preference behavioral paradigm from P44-P51, and given a preference test on P52. On P53, the nucleus accumbens and hippocampus were analyzed for brain-derived neurotrophic factor. Methylphenidate enhanced nicotine-conditioned place preference in females and nicotine produced conditioned place preference in males and females pre-exposed to saline in adolescence. In addition, methylphenidate and nicotine increased nucleus accumbens brain-derived neurotrophic factor in females and methylphenidate enhanced hippocampus brain-derived neurotrophic factor in males and females. Methylphenidate adolescent exposure using a clinically relevant dose and regimen results in changes in the behavioral and brain-derived neurotrophic factor responses to nicotine in adolescence that are sex-dependent.
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Affiliation(s)
- Elizabeth D Cummins
- 1 Department of Psychology, East Tennessee State University, Johnson City, TN, USA
| | - Kristen K Leedy
- 1 Department of Psychology, East Tennessee State University, Johnson City, TN, USA
| | - John M Dose
- 3 Department of Psychology, St Norbert College, De Pere, WI, USA
| | - Daniel J Peterson
- 1 Department of Psychology, East Tennessee State University, Johnson City, TN, USA
| | - Seth L Kirby
- 1 Department of Psychology, East Tennessee State University, Johnson City, TN, USA
| | - Liza J Hernandez
- 1 Department of Psychology, East Tennessee State University, Johnson City, TN, USA
| | - Russell W Brown
- 2 Department of Biomedical Sciences, East Tennessee State University, Johnson City, TN, USA
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Li M, Du W, Shao F, Wang W. Cognitive dysfunction and epigenetic alterations of the BDNF gene are induced by social isolation during early adolescence. Behav Brain Res 2016; 313:177-183. [DOI: 10.1016/j.bbr.2016.07.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 07/11/2016] [Accepted: 07/15/2016] [Indexed: 10/21/2022]
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Li E, Deng H, Wang B, Fu W, You Y, Tian S. Apelin-13 exerts antidepressant-like and recognition memory improving activities in stressed rats. Eur Neuropsychopharmacol 2016; 26:420-30. [PMID: 26853763 DOI: 10.1016/j.euroneuro.2016.01.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 12/23/2015] [Accepted: 01/23/2016] [Indexed: 01/23/2023]
Abstract
Apelin is the endogenous ligand for the G-protein-coupled receptor (APJ). The localization of APJ in limbic structures suggests a potential role for apelin in emotional processes. However, the role of apelin in the regulation of stress-induced responses such as depression and memory impairment is largely unknown. In the present study, we evaluated the role of apelin-13 in the regulation of stress-induced depression and memory impairment in rats. We report that repeated intracerebroventricular injections of apelin-13 reversed behavioral despair (immobility) in the forced swim (FS) test, a model widely used for the selection of new antidepressant agents. Apelin-13 also reversed behavioral deficits (escape failure) in the learned helplessness test. The magnitude of the antiimmobility and anti-escape failure effects of apelin-13 was comparable to that of imipramine, a classic antidepressant used as a positive control. Rats exposed to FS stress showed memory performance impairment in the novel object recognition test, and this impairment was improved by apelin-13 treatment. Apelin-13 did not affect recognition memory performance in non-stressed rats. Furthermore, the pretreatment of LY294002 (PI3K inhibitors) or PD98059 (ERK1/2 inhibitor) blocked apelin-13-mediated activities in FS-stressed rats. These findings suggest that apelin-13 exerts antidepressant-like and recognition memory improving activities through activating PI3K and ERK1/2 signaling pathways in stressed rats.
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Affiliation(s)
- E Li
- Department of Physiology, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China
| | - Haifeng Deng
- Department of Physiology, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China
| | - Bo Wang
- Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Department of Anesthesiology, First Affiliated Hospital, University of South China, Hengyang, Hunan 421001, PR China
| | - Wan Fu
- Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Department of Neurology, First Affiliated Hospital, University of South China, Hengyang, Hunan 421001, PR China
| | - Yong You
- Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Department of Neurology, First Affiliated Hospital, University of South China, Hengyang, Hunan 421001, PR China
| | - Shaowen Tian
- Department of Physiology, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China; Institute of Neuroscience, College of Medicine, University of South China, Hengyang, Hunan 421001, PR China.
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Marriott AL, Tasker RA, Ryan CL, Doucette TA. Alterations to prepulse inhibition magnitude and latency in adult rats following neonatal treatment with domoic acid and social isolation rearing. Behav Brain Res 2016; 298:310-7. [DOI: 10.1016/j.bbr.2015.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 11/05/2015] [Accepted: 11/09/2015] [Indexed: 12/27/2022]
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20
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Champeil-Potokar G, Hennebelle M, Latour A, Vancassel S, Denis I. Docosahexaenoic acid (DHA) prevents corticosterone-induced changes in astrocyte morphology and function. J Neurochem 2016; 136:1155-1167. [PMID: 26709611 DOI: 10.1111/jnc.13510] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/08/2015] [Accepted: 12/10/2015] [Indexed: 01/02/2023]
Abstract
The many functions of astrocytes, such as glutamate recycling and morphological plasticity, enable them to stabilize synapses environment and protect neurons. Little is known about how they adapt to glucocorticoid-induced stress, and even less about the influence of dietary factors. We previously showed that omega-3 polyunsaturated fatty acids (ω3PUFA), dietary fats which alleviate stress responses, influence the way astroglia regulate glutamatergic synapses. We have explored the role of docosahexaenoic acid (DHA), the main ω3PUFA, in the astroglial responses to corticosterone, the main stress hormone in rodents to determine whether ω3PUFA help astrocytes resist stress. Cultured rat astrocytes were enriched in DHA or arachidonic acid (AA, the main ω6PUFA) and given 100 nM corticosterone for several days. Corticosterone stimulated astrocyte glutamate recycling by increasing glutamate uptake and glutamine synthetase (GS), and altered the astrocyte cytoskeleton. DHA-enriched astrocytes no longer responded to the action of corticosterone on glutamate uptake, had decreased GS, and the cytoskeletal effect of corticosterone was delayed, while AA-enriched cells were unaffected. The DHA-dependent anti-corticosterone effect was related to fewer glucocorticoid receptors, while corticosterone increased DHA incorporation into astrocyte membranes. Thus, DHA helps astrocytes resist the influence of corticosterone, so perhaps promoting a sustainable response by the stressed brain. We show that corticosterone increases the glutamate recycling capacity of rat cortical astrocytes in culture, and alters their morphology, which may be detrimental in the long term. Increasing the membrane incorporation of docosahexaenoic acid (DHA), the main omega-3 in brain, reduces the amount of glucocorticoid receptors (GR) and prevents the effects of corticosterone. This may help the astrocytes maintain a functional phenotype in chronic stress situations.
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Affiliation(s)
| | - Marie Hennebelle
- Department of Food Science and Technology, University of California, Davis, CA, USA
| | - Alizée Latour
- INRA, Nutrition et Régulation Lipidique des Fonctions Cérébrales U0902 NURELICE, Jouy-en-Josas, France
| | - Sylvie Vancassel
- INRA, NutriNeurO UMR INRA 1286, Université Victor Segalen Bordeaux 2, Bordeaux Cedex, France
| | - Isabelle Denis
- INRA, Neurobiologie de l'Olfaction U1197 NBO, Domaine de Vilvert, Jouy-en-Josas, France
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d-amphetamine withdrawal-induced decreases in brain-derived neurotrophic factor in sprague-dawley rats are reversed by treatment with ketamine. Neuropharmacology 2015; 97:7-17. [DOI: 10.1016/j.neuropharm.2015.04.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/24/2015] [Accepted: 04/26/2015] [Indexed: 12/16/2022]
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