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https://www.readbyqxmd.com/read/29130470/-the-influence-of-social-stress-on-the-reinforcing-effect-of-ecstasy-under-the-conditioned-place-preference-paradigm-the-role-played-by-age-dose-and-type-of-stress
#1
REVIEW
M P Garcia-Pardo, J E de la Rubia, M A Aguilar
INTRODUCTION: Addiction to drugs is a chronic illness with severe repercussions for those that consume them and to date has no known cure. Psychostimulants, such as ecstasy, are the most widely consumed illegal drugs among adolescents and young adults. AIMS: To describe and to analyse the different variables that can influence the effects of social stress and the reinforcing properties of ecstasy. Likewise, it also seeks to evaluate whether the effects of social stress on conditioned place preference (induced by ecstasy) are similar to those deriving from other psychostimulants, such as cocaine...
November 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/29126982/effects-of-chronic-social-defeat-on-social-behaviors-in-adult-female-mandarin-voles-microtus-mandarinus-involvement-of-the-oxytocin-system-in-the-nucleus-accumbens
#2
Limin Wang, Wenjuan Hou, Zhixiong He, Wei Yuan, Jinfeng Yang, Yang Yang, Rui Jia, Zhenxiang Zhu, Yue Zhou, Fadao Tai
Chronic social defeat affects many aspects of behavior. Most previous studies have focused on effects on males and defeat during adolescence. The extents to which chronic social defeat can impact female social behavior in adulthood and the neural mechanisms of such effects are poorly understood. Using highly social and aggressive female mandarin voles (Microtus mandarinus), the present study found that chronic social defeat reduced social preference in adult females, and that the defeated voles exhibited a high level of freeze, self-grooming and defensive behavior, as well as reduced exploration, intimacy and aggression during social interactions...
November 7, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29126979/ropivacaine-and-bupivacaine-prevent-increased-pain-sensitivity-without-altering-neuroimmune-activation-following-repeated-social-defeat-stress
#3
Caroline M Sawicki, January K Kim, Michael D Weber, Brant L Jarrett, Jonathan P Godbout, John F Sheridan, Michelle Humeidan
Mounting evidence indicates that stress influences the experience of pain. Exposure to psychosocial stress disrupts bi-directional communication pathways between the central nervous system and peripheral immune system, and can exacerbate the frequency and severity of pain experienced by stressed subjects. Repeated social defeat (RSD) is a murine model of psychosocial stress that recapitulates the immune and behavioral responses to stress observed in humans, including activation of stress-reactive neurocircuitry and increased pro-inflammatory cytokine production...
November 7, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29118713/corticotropin-releasing-factor-in-the-bed-nucleus-of-the-stria-terminalis-in-socially-defeated-and-non-stressed-mice-with-a-history-of-chronic-alcohol-intake
#4
Lucas Albrechet-Souza, Thiago W Viola, Rodrigo Grassi-Oliveira, Klaus A Miczek, Rosa M M de Almeida
Stress exposure has been identified as one risk factor for alcohol abuse that may facilitate the transition from social or regulated use to the development of alcohol dependence. Preclinical studies have shown that dysregulation of the corticotropin releasing factor (CRF) neurotransmission has been implicated in stress-related psychopathologies such as depression and anxiety, and may affect alcohol consumption. The bed nucleus of the stria terminalis (BNST) contains CRF-producing neurons which seem to be sensitive to stress...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29118417/brain-activation-induced-by-chronic-psychosocial-stress-in-mice
#5
Mikaela A Laine, Ewa Sokolowska, Mateusz Dudek, Saija-Anita Callan, Petri Hyytiä, Iiris Hovatta
Chronic psychosocial stress is a well-established risk factor for neuropsychiatric diseases. Abnormalities in brain activity have been demonstrated in patients with stress-related disorders. Global brain activation patterns during chronic stress exposure are less well understood but may have strong modifying effects on specific brain circuits and thereby influence development of stress-related pathologies. We determined neural activation induced by chronic social defeat stress, a mouse model of psychosocial stress...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29114211/microglial-over-activation-by-social-defeat-stress-contributes-to-anxiety-and-depressive-like-behaviors
#6
REVIEW
Dirson J Stein, Mailton F Vasconcelos, Lucas Albrechet-Souza, Keila M M Ceresér, Rosa M M de Almeida
Hyper activation of the neuroimmune system is strongly related to the development of neuropsychiatric disorders. Psychosocial stress has been postulated to play an important role in triggering anxiety and major depression. In preclinical models, there is mounting evidence that social defeat stress activates microglial cells in the central nervous system. This type of stress could be one of the major factors in the development of these psychopathologies. Here, we reviewed the most recent literature on social defeat and the associated immunological reactions...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29103920/influence-of-the-anteromedial-thalamus-on-social-defeat-associated-contextual-fear-memory
#7
Miguel J Rangel, Marcus Vinicius C Baldo, Newton Sabino Canteras
The ventral part of the anteromedial thalamic nucleus (AMv) is heavily targeted by the dorsal premammillary nucleus (PMd), which is the main hypothalamic site that is responsive to both predator and conspecific aggressor threats. This PMd-AMv pathway is likely involved in modulating memory processing, and previous findings from our group have shown that cytotoxic lesions or pharmacological inactivation of the AMv drastically reduced contextual fear responses to predator-associated environments. In the present study, we investigated the role of the AMv in both unconditioned (i...
November 2, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29090682/a-novel-method-for-chronic-social-defeat-stress-in-female-mice
#8
Alexander Z Harris, Piray Atsak, Zachary H Bretton, Emma S Holt, Raisa Alam, Mitchell P Morton, Atheir I Abbas, E David Leonardo, Scott S Bolkan, René Hen, Joshua A Gordon
Historically, preclinical stress studies have often omitted female subjects, despite evidence that women have higher rates of anxiety and depression. In rodents, many stress susceptibility and resilience studies have focused on males since one commonly used paradigm-chronic social defeat stress-has proven challenging to implement in females. We report a new version of the social defeat paradigm that works in female mice. By applying male odorants to females in order to increase resident male aggressive behavior, we find that female mice undergo repeated social defeat stress and develop social avoidance, decreased sucrose preference and decreased time in the open arms of the elevated plus maze relative to control mice...
November 1, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29083030/a-practical-guide-for-inferring-reliable-dominance-hierarchies-and-estimating-their-uncertainty
#9
Alfredo Sánchez-Tójar, Julia Schroeder, Damien R Farine
1.Many animal social structures are organized hierarchically, with dominant individuals monopolizing resources. Dominance hierarchies have received great attention from behavioural and evolutionary ecologists. 2.There are many methods for inferring hierarchies from social interactions. Yet, there are no clear guidelines about how many observed dominance interactions (i.e. sampling effort) are necessary for inferring reliable dominance hierarchies, nor are there any established tools for quantifying their uncertainty...
October 30, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29074097/behavioral-effects-of-early-life-maternal-trauma-witness-in-rats
#10
Hesong Liu, Gaurav Patki, Ankita Salvi, Matthew Kelly, Samina Salim
BACKGROUND: Earlier, we have reported that post-traumatic stress disorder (PTSD)-like behaviors developed in rats that witnessed their cage mates undergo repeated traumatic stress. More recently, we published that early life physical traumatic stress leads to later life depression-like behaviors in rats. Whether early life trauma witness causes later life PTSD-like behaviors is not known. Also unclear are sex-specific stress-induced behavioral variations in later life. The early life witness component of stress is an important aspect of stress-induced psychopathologies and must be investigated...
October 24, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29066224/oxytocin-receptors-in-the-anteromedial-bed-nucleus-of-the-stria-terminalis-promote-stress-induced-social-avoidance-in-female-california-mice
#11
Natalia Duque-Wilckens, Michael Q Steinman, Marta Busnelli, Bice Chini, Sae Yokoyama, Mary Pham, Sarah A Laredo, Rebecca Hao, Allison M Perkeybile, Vanessa A Minie, Phillip B Tan, Karen L Bales, Brian C Trainor
BACKGROUND: The neuropeptide oxytocin (OT) is a key regulator of social and emotional behaviors. The effects of OT are context dependent, and it has been proposed that OT increases the salience of both positive and negative social cues. Here we tested whether the bed nucleus of the stria terminalis (BNST) mediates anxiogenic effects of OT. METHODS: First, we studied the effects of systemic administration of an OT receptor (OTR) antagonist L-368,899 on social behavior in male and female California mice exposed to social defeat...
September 14, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29056427/consequences-of-continuous-social-defeat-stress-on-anxiety-and-depressive-like-behaviors-and-ethanol-reward-in-mice
#12
Giovana Camila de Macedo, Gleice Midori Morita, Liz Paola Domingues, Cristiane Favoretto, Deborah Suchecki, Isabel Marian Hartmann Quadros
This study employed the intruder-resident paradigm to evaluate the effects of continuous social defeat on depressive- and anxiety-like behaviors and the reinforcing and motivational actions of ethanol in male Swiss mice. Male Swiss mice were exposed to a 10-day social defeat protocol, while control mice cohabitated with a non-aggressive animal. Continuous defeat stress consisted of episodes of defeat, followed by 24h or 48h cohabitation with the aggressor until the following defeat. Mice were assessed for sucrose drinking (anhedonia), social investigation test, elevated plus-maze, conditioned place preference to ethanol, and locomotor response to ethanol...
October 19, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29035920/the-antidepressant-like-effects-of-sinomenine-in-mice-a-behavioral-and-neurobiological-characterization
#13
Xiuqin Li, Chao Liu, Bo Jiang, Kai Chen, Wenjuan Li, Hongze Wang
Sinomenine is a bioactive alkaloid extracted from Sinomenium acutum. Here, we investigated the antidepressant effects of sinomenine in mice. The antidepressant actions of sinomenine were first examined in the forced-swim test and the tail-suspension test, and then assessed in the chronic social defeat stress (CSDS) model of depression. Changes in the brain-derived neurotrophic factor (BDNF) signaling pathway after CSDS and sinomenine treatment were also investigated. A tryptophan hydroxylase inhibitor and a BDNF signaling inhibitor were also used to determine the pharmacological mechanisms of sinomenine...
October 13, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/29020387/reversal-of-stress-induced-social-interaction-deficits-by-buprenorphine
#14
Caroline A Browne, Edgardo Falcon, Shivon A Robinson, Olivier Berton, Irwin Lucki
Background: Patients with post-traumatic stress disorder (PTSD) frequently report persistent problems with social interactions, emerging after a traumatic experience. Chronic social defeat stress (CSDS) is a widely used rodent model of stress that produces robust and sustained social avoidance behavior. The avoidance of other rodents can be reversed by 28 days of treatment with selective serotonin reuptake inhibitors (SSRIs), the only pharmaceutical class approved by the U. S. Food and Drug Administration for treating PTSD...
August 31, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29016792/antidepressant-like-actions-of-inhibitors-of-poly-adp-ribose-polymerase-in-rodent-models
#15
Gregory A Ordway, Attila Szebeni, Liza J Hernandez, Jessica D Crawford, Katalin Szebeni, Michelle J Chandley, Katherine C Burgess, Corwin Miller, Erol Bakkalbasi, Russell W Brown
Background: Many patients suffering from depressive disorders are refractory to treatment with currently available antidepressant medications, while many more exhibit only a partial response. These factors drive research to discover new pharmacological approaches to treat depression. Numerous studies demonstrate evidence of inflammation and elevated oxidative stress in major depression. Recently, major depression has been shown to be associated with elevated levels of DNA oxidation in brain cells, accompanied by increased gene expression of the nuclear base excision repair enzyme, poly(ADP-ribose) polymerase-1...
August 3, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28993631/establishment-of-a-repeated-social-defeat-stress-model-in-female-mice
#16
Aki Takahashi, Jia-Ru Chung, Song Zhang, Hongxing Zhang, Yael Grossman, Hossein Aleyasin, Meghan E Flanigan, Madeline L Pfau, Caroline Menard, Dani Dumitriu, Georgia E Hodes, Bruce S McEwen, Eric J Nestler, Ming-Hu Han, Scott J Russo
Numerous studies have employed repeated social defeat stress (RSDS) to study the neurobiological mechanisms of depression in rodents. An important limitation of RSDS studies to date is that they have been conducted exclusively in male mice due to the difficulty of initiating attack behavior directed toward female mice. Here, we establish a female mouse model of RSDS by inducing male aggression toward females through chemogenetic activation of the ventrolateral subdivision of the ventromedial hypothalamus (VMHvl)...
October 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28967185/itraq-based-proteomics-suggests-ephb6-as-a-potential-regulator-of-the-erk-pathway-in-the-prefrontal-cortex-of-chronic-social-defeat-stress-model-mice
#17
Hua Guo, Zhi-Lin Huang, Wei Wang, Shu-Xiao Zhang, Juan Li, Ke Cheng, Ke Xu, Yong He, Si-Wen Gui, Peng-Fei Li, Hai-Yang Wang, Zhi-Fang Dong, Peng Xie
PURPOSE: Major depressive disorder (MDD) is a worldwide concern and devastating psychiatric disease. The World Health Organization claims that MDD leads to at least 11.9% of the global burden of disease. However, the underlying pathophysiology mechanisms of MDD remain largely unknown. EXPERIMENTAL DESIGN: Herein, we proteomic-based strategy is used to compare the prefrontal cortex (PFC) in chronic social defeat stress (CSDS) model mice with a control group. Based on pooled samples, differential proteins are identified in the PFC proteome using iTRAQ coupled with LC-MS/MS...
October 1, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28955290/selective-fair-behavior-as-a-function-of-psychopathic-traits-in-a-subclinical-population
#18
Takahiro Osumi, Hideki Ohira
Psychopathy is a group of personality traits that are associated with violations of social norms. Previous studies have suggested that people with psychopathic traits in subclinical populations do not necessarily display antisocial, self-defeating behaviors, and instead may strategically show adaptive behaviors in response to cues during reciprocal social interactions. Therefore, in the present study, we examined whether the association between psychopathic traits and unfair behavior can be moderated by a potential for punishment and social distance (anonymity), which are known to facilitate fair behavior...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28935447/prosocial-effects-of-prolactin-in-male-rats-social-recognition-social-approach-and-social-learning
#19
Mary E Donhoffner, Samar Al Saleh, Olivia Schink, Ruth I Wood
Prolactin (PRL) and oxytocin (OT) are pituitary hormones essential for lactation, but also promote sexual behavior. OT stimulates social behaviors, such as recognition, approach, and learning, but less is known about PRL in these behaviors. Since PRL and OT have complementary functions in reproduction, we hypothesized that PRL increases social recognition, approach, and learning. Male Long-Evans rats received ovine PRL (oPRL; 0.5, 2.0 or 5.0mg/kg), the PRL antagonist bromocriptine (0.1, 3.0 or 5.0mg/kg) or saline 20 mins before testing for recognition of familiar vs...
September 24, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28924188/dopamine-d1-receptor-subtype-mediates-acute-stress-induced-dendritic-growth-in-excitatory-neurons-of-the-medial-prefrontal-cortex-and-contributes-to-suppression-of-stress-susceptibility-in-mice
#20
R Shinohara, M Taniguchi, A T Ehrlich, K Yokogawa, Y Deguchi, Y Cherasse, M Lazarus, Y Urade, A Ogawa, S Kitaoka, A Sawa, S Narumiya, T Furuyashiki
Dopamine in prefrontal cortices is implicated in cognitive and emotional functions, and the dysfunction of prefrontal dopamine has been associated with cognitive and emotional deficits in mental illnesses. These findings have led to clinical trials of dopamine-targeting drugs and brain imaging of dopamine receptors in patients with mental illnesses. Rodent studies have suggested that dopaminergic pathway projecting to the medial prefrontal cortex (mPFC) suppresses stress susceptibility. Although various types of mPFC neurons express several dopamine receptor subtypes, previous studies neither isolated a role of dopamine receptor subtype nor identified the site of its action in mPFC...
September 19, 2017: Molecular Psychiatry
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