keyword
MENU ▼
Read by QxMD icon Read
search

learned helplessness

keyword
https://www.readbyqxmd.com/read/29155993/lack-of-antidepressant-effects-of-2r-6r-hydroxynorketamine-in-a-rat-learned-helplessness-model-comparison-with-r-ketamine
#1
Yukihiko Shirayama, Kenji Hashimoto
Background: (R)-Ketamine exhibits rapid and sustained antidepressant effects in animal models of depression. It is stereoselectively metabolized to (R)-norketamine, and subsequently to (2R,6R)-hydroxynorketamine (HNK) in the liver. The metabolism of ketamine to HNK was recently demonstrated to be essential for ketamine's antidepressant actions. However, no study has compared the antidepressant effects of these three compounds in animal models of depression. Methods: The effects of a single intraperitoneal injection of (R)-ketamine, (R)-norketamine, and (2R,6R)-HNK in a rat learned helplessness (LH) model were examined...
November 15, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29151391/repeated-treatment-with-nitric-oxide-synthase-inhibitor-attenuates-learned-helplessness-development-in-rats-and-increases-hippocampal-bdnf-expression
#2
Laura Alves Stanquini, Caroline Biojone, Francisco Silveira Guimarães, Sâmia Regiane Joca
BACKGROUND: Nitric oxide synthase (NOS) inhibitors induce antidepressant-like effects in animal models sensitive to acute drug treatment such as the forced swimming test. However, it is not yet clear if repeated treatment with these drugs is required to induce antidepressant-like effects in preclinical models. OBJECTIVE: The aim of this study was to test the effect induced by acute or repeated (7 days) treatment with 7-nitroindazole (7-NI), a preferential inhibitor of neuronal NOS, in rats submitted to the learned helplessness (LH) model...
November 20, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/29132340/what-do-japanese-residents-learn-from-treating-dying-patients-the-implications-for-training-in-end-of-life-care
#3
Kazuko Arai, Takuya Saiki, Rintaro Imafuku, Chihiro Kawakami, Kazuhiko Fujisaki, Yasuyuki Suzuki
BACKGROUND: How medical residents' experiences with care for dying patients affect their emotional well-being, their learning outcomes, and the formation of their professional identities is not fully understood. We examine residents' emotional states and learning occurring during the provision of care to dying patients and specifically discuss the impact of providing end-of-life (EOL) care on professional identity formation. METHODS: Semi-structured interviews were conducted with 13 residents who had graduated in the last 3 to 5 years...
November 13, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/29119264/keap1-nrf2-signaling-pathway-confers-resilience-versus-susceptibility-to-inescapable-electric-stress
#4
Ji-Chun Zhang, Wei Yao, Chao Dong, Mei Han, Yukihiko Shirayama, Kenji Hashimoto
The transcription factor Keap1-Nrf2 signaling plays a key role in the oxidative stress which is involved in psychiatric disorders. In the learned helplessness (LH) paradigm, protein levels of Keap1 and Nrf2 in the prefrontal cortex and dentate gyrus of hippocampus from LH (susceptible) rats were lower than control and non-LH (resilience) rats. Furthermore, protein expressions of Keap1 and Nrf2 in the parietal cortex from major depressive disorder, schizophrenia, and bipolar disorder were lower than controls...
November 8, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/29075536/neural-plasticity-associated-with-hippocampal-pka-creb-and-nmda-signaling-is-involved-in-the-antidepressant-effect-of-repeated-low-dose-of-yueju-pill-on-chronic-mouse-model-of-learned-helplessness
#5
Zhilu Zou, Yin Chen, Qinqin Shen, Xiaoyan Guo, Yuxuan Zhang, Gang Chen
Yueju pill is a traditional Chinese medicine formulated to treat syndromes of mood disorders. Here, we investigated the therapeutic effect of repeated low dose of Yueju in the animal model mimicking clinical long-term depression condition and the role of neural plasticity associated with PKA- (protein kinase A-) CREB (cAMP response element binding protein) and NMDA (N-methyl-D-aspartate) signaling. We showed that a single low dose of Yueju demonstrated antidepressant effects in tests of tail suspension, forced swim, and novelty-suppressed feeding...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28957945/rough-and-tumble-play-induces-resilience-to-stress-in-rats
#6
Jeffrey Burgdorf, Roger A Kroes, Joseph R Moskal
Positive emotions have been shown to induce resilience to stress in humans, as well as increase cognitive abilities (learning, memory, and problem solving) and improve overall health. In rats, frequency modulated 50-kHz ultrasonic vocalizations (hedonic 50 kHz) reflect a positive affective state and are best elicited by rough-and-tumble play. A well-established rat chronic unpredictable stress paradigm was used to produce a robust and long-lasting decrease in positive affect, increase in negative affect, and learned helplessness in Sprague-Dawley rats...
December 6, 2017: Neuroreport
https://www.readbyqxmd.com/read/28867895/estrous-cycle-phase-dependent-changes-in-anxiety-and-depression-like-profiles-in-the-late-adolescent-wistar-kyoto-rat
#7
Deepthi D'Souza, Monika Sadananda
BACKGROUND: Depression often manifests during adolescence when the development and networking of social and emotional brain areas is being influenced by hormones. The Wistar Kyoto (WKY) rat has been proposed as an animal model of adolescent depression with various face, construct, and predictive validities for clinical depression having been established. PURPOSE: The influence of the estrous cycle on anxiety- and depression-like behaviors in female adolescents may be tested out further using this model...
July 2017: Annals of Neurosciences
https://www.readbyqxmd.com/read/28844005/synaptic-potentiation-mediated-by-l-type-voltage-dependent-calcium-channels-mediates-the-antidepressive-effects-of-lateral-habenula-stimulation
#8
Qinji Zhou, Jianyang Dong, Ting Xu, Xiang Cai
Although deep-brain stimulation (DBS) of the lateral habenula (LHb) has been successfully applied to treatment-resistant depression for years, the mechanism is still unclear. Previous researches have demonstrated that LHb-DBS elevates brain monoamine neurotransmitters. However, these changes do not account for the treatment efficacy on treatment-resistant depression, or the rapid behavioral effects in rats; the evidence suggests that altered synaptic potentiation may contribute to the treatment effects. We applied LHb-DBS in a rat model of learned helplessness (LH) and analyzed mammalian target of rapamycin (mTOR) phosphorylation...
August 24, 2017: Neuroscience
https://www.readbyqxmd.com/read/28843434/when-patients-and-their-families-feel-like-hostages-to-health-care
#9
REVIEW
Leonard L Berry, Tracey S Danaher, Dan Beckham, Rana L A Awdish, Kedar S Mate
Patients are often reluctant to assert their interests in the presence of clinicians, whom they see as experts. The higher the stakes of a health decision, the more entrenched the socially sanctioned roles of patient and clinician can become. As a result, many patients are susceptible to "hostage bargaining syndrome" (HBS), whereby they behave as if negotiating for their health from a position of fear and confusion. It may manifest as understating a concern, asking for less than what is desired or needed, or even remaining silent against one's better judgment...
September 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28798343/isoflurane-produces-antidepressant-effects-and-induces-trkb-signaling-in-rodents
#10
Hanna Antila, Maria Ryazantseva, Dina Popova, Pia Sipilä, Ramon Guirado, Samuel Kohtala, Ipek Yalcin, Jesse Lindholm, Liisa Vesa, Vinicius Sato, Joshua Cordeira, Henri Autio, Mikhail Kislin, Maribel Rios, Sâmia Joca, Plinio Casarotto, Leonard Khiroug, Sari Lauri, Tomi Taira, Eero Castrén, Tomi Rantamäki
A brief burst-suppressing isoflurane anesthesia has been shown to rapidly alleviate symptoms of depression in a subset of patients, but the neurobiological basis of these observations remains obscure. We show that a single isoflurane anesthesia produces antidepressant-like behavioural effects in the learned helplessness paradigm and regulates molecular events implicated in the mechanism of action of rapid-acting antidepressant ketamine: activation of brain-derived neurotrophic factor (BDNF) receptor TrkB, facilitation of mammalian target of rapamycin (mTOR) signaling pathway and inhibition of glycogen synthase kinase 3β (GSK3β)...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28782590/may-the-use-of-different-background-strains-strain-the-stress-related-phenotype-of-gr-mice
#11
Miriam A Vogt, Natascha Pfeiffer, Anne Marie Le Guisquet, Christiane Brandwein, Bruno Brizard, Peter Gass, Catherine Belzung, Sabine Chourbaji
Genetically altered mice are available on different background strains. While respective backcrosses are often performed for pragmatic reasons, e.g. references, comparability, or existing protocols, the interaction between the mutations per se and the background strain often remains a neglected factor. The heterozygous mutation of the glucocorticoid receptor gene (GR) represents a well-examined model for depressive-like behavior in mice. To address the question in how far a robust depressive-like phenotype on a distinct background strain may allow a generalized conclusion, we analyzed respective phenotypes in two commonly used inbred strains: i...
August 3, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28719226/learned-helplessness-and-sexual-risk-taking-in-adolescent-and-young-adult-african-american-females
#12
Laura Pittiglio
Research involving adolescent and young African American (AA) females has demonstrated that they face uncontrollable obstacles which can interfere with the negotiation of safer sexual behaviors. If these obstacles are perceived as uncontrollable, then these females may be at risk for the development of Learned Helplessness (LH). As the LH model predicts, if these obstacles are believed not to be in their control, it may lead to deficits in motivational or cognitive decision-making, deficits that could certainly influence their sexual risk taking behaviors...
August 2017: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/28642693/exposure-to-unsolvable-anagrams-impairs-performance-on-the-iowa-gambling-task
#13
Katrin Starcke, Janet D Agorku, Matthias Brand
Recent research indicates that external manipulations, such as stress or mood induction, can affect decision-making abilities. In the current study, we investigated whether the exposure to an unsolvable task affected subsequent performance on the Iowa Gambling Task. Participants were randomly assigned to a condition in which they were exposed to unsolvable anagrams (n = 20), or a condition in which they worked on solvable anagrams (n = 22). Afterwards, all participants played the Iowa Gambling Task, a prominent task that measures decision making under uncertain conditions with no explicit rules for gains and losses...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28633291/p2x7-receptors-drive-spine-synapse-plasticity-in-the-learned-helplessness-model-of-depression
#14
Lilla Otrokocsi, Ágnes Kittel, Beáta Sperlágh
Background: Major depressive disorder is characterized by structural and functional abnormalities of cortical and limbic brain areas, including a decrease in spine synapse number in the dentate gyrus of the hippocampus. Recent studies highlighted that both genetic and pharmacological invalidation of the purinergic P2X7 receptor (P2rx7) leads to antidepressant-like phenotype in animal experiments; however, the impact of P2rx7 on depression-related structural changes in the hippocampus is not clarified yet...
October 1, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28617373/-a-psychological-content-of-social-phobia-syndrome
#15
O A Sagalakova, D V Truevtsev, I Ya Stoyanova
AIM: To perform a psychological analysis of social phobia syndrome. The subject area of research is the structure of mental activity and behavior in social activity. MATERIAL AND METHODS: The study included 32 patients with symptoms of social phobia (ICD-10 F40.1) and 29 healthy people (controls). A complex of psychological methods (questionnaires; pathopsychological experiment) was used. RESULTS AND CONCLUSION: Early maladaptive schemes and a tendency to mental rigidity can be a premorbid basis of the syndrome...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28585931/the-modulation-of-adult-neuroplasticity-is-involved-in-the-mood-improving-actions-of-atypical-antipsychotics-in-an-animal-model-of-depression
#16
M Morais, P Patrício, A Mateus-Pinheiro, N D Alves, A R Machado-Santos, J S Correia, J Pereira, L Pinto, N Sousa, J M Bessa
Depression is a prevalent psychiatric disorder with an increasing impact in global public health. However, a large proportion of patients treated with currently available antidepressant drugs fail to achieve remission. Recently, antipsychotic drugs have received approval for the treatment of antidepressant-resistant forms of major depression. The modulation of adult neuroplasticity, namely hippocampal neurogenesis and neuronal remodeling, has been considered to have a key role in the therapeutic effects of antidepressants...
June 6, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28585544/serotonin-modulates-a-depression-like-state-in-drosophila-responsive-to-lithium-treatment
#17
Ariane-Saskia Ries, Tim Hermanns, Burkhard Poeck, Roland Strauss
Major depressive disorder (MDD) affects millions of patients; however, the pathophysiology is poorly understood. Rodent models have been developed using chronic mild stress or unavoidable punishment (learned helplessness) to induce features of depression, like general inactivity and anhedonia. Here we report a three-day vibration-stress protocol for Drosophila that reduces voluntary behavioural activity. As in many MDD patients, lithium-chloride treatment can suppress this depression-like state in flies. The behavioural changes correlate with reduced serotonin (5-HT) release at the mushroom body (MB) and can be relieved by feeding the antidepressant 5-hydroxy-L-tryptophan or sucrose, which results in elevated 5-HT levels in the brain...
June 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28585017/laboratory-induced-learned-helplessness-attenuates-approach-motivation-as-indexed-by-posterior-versus-frontal-theta-activity
#18
Samantha J Reznik, Robin Nusslock, Narun Pornpattananangkul, Lyn Y Abramson, James A Coan, Eddie Harmon-Jones
Research suggests that midline posterior versus frontal electroencephalographic (EEG) theta activity (PFTA) may reflect a novel neurophysiological index of approach motivation. Elevated PFTA has been associated with approach-related tendencies both at rest and during laboratory tasks designed to enhance approach motivation. PFTA is sensitive to changes in dopamine signaling within the fronto-striatal neural circuit, which is centrally involved in approach motivation, reward processing, and goal-directed behavior...
June 5, 2017: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/28556813/cognitive-motivational-determinants-of-residents-civic-engagement-and-health-inequities-in-the-context-of-noise-action-planning-a-conceptual-model
#19
Natalie Riedel, Irene van Kamp, Heike Köckler, Joachim Scheiner, Adrian Loerbroks, Thomas Claßen, Gabriele Bolte
The Environmental Noise Directive expects residents to be actively involved in localising and selecting noise abatement interventions during the noise action planning process. Its intervention impact is meant to be homogeneous across population groups. Against the background of social heterogeneity and environmental disparities, however, the impact of noise action planning on exposure to traffic-related noise and its health effects is unlikely to follow homogenous distributions. Until now, there has been no study evaluating the impact of noise action measures on the social distribution of traffic-related noise exposure and health outcomes...
May 30, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28544869/restoring-agency-to-the-human-actor
#20
William B Swann, Jolanda Jetten
A cursory read of the social psychological literature suggests that when people find themselves in strong situations, they fail to display agency. The early classic studies of conformity, obedience, and bystander intervention, for example, are renowned for showing that when challenged by strong situational pressures, participants acquiesced-even if it meant abandoning their moral principles or disregarding their own sensory data. Later studies of learned helplessness, ego depletion, and stereotype threat echoed this "power of the situation" theme, demonstrating that exposure to (or the expectation of) a frustrating or unpleasant experience suppressed subsequent efforts to actualize goals and abilities...
May 2017: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
keyword
keyword
88251
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"