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Ketamine schizophrenia

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https://www.readbyqxmd.com/read/28421529/suppression-of-methamphetamine-self-administration-by-ketamine-pre-treatment-is-absent-in-the-methylazoxymethanol-mam-rat-model-of-schizophrenia
#1
Jana Ruda-Kucerova, Zuzana Babinska, Tibor Stark, Vincenzo Micale
Ketamine may prove to be a potential candidate in treating the widespread drug addiction/substance abuse epidemic among patients with schizophrenia. Clinical studies have shown ketamine to reduce cocaine and heroin cravings. However, the use of ketamine remains controversial as it may exacerbate the symptoms of schizophrenia. Therefore, the aim of this study is to characterize the effects of ketamine on drug addiction in schizophrenia using the methylazoxymethanol (MAM) acetate rat model on operant IV methamphetamine (METH) self-administration...
April 18, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28418641/classics-in-chemical-neuroscience-ketamine
#2
Marshall W Tyler, Harmony B Yourish, Dawn F Ionescu, Stephen J Haggarty
Ketamine, a molecule of many faces, has contributed immeasurably to numerous realms of clinical practice and scientific inquiry. From anesthesia and analgesia to depression and schizophrenia, it continues to shed light on the molecular underpinnings of pain, consciousness, and the pathophysiology of neuropsychiatric disorders. In particular, research on ketamine's mechanism of action is providing new hope in the search for therapies for treatment-resistant depression and affords insights into disorders of glutamatergic dysfunction...
April 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28408985/new-drugs-in-psychiatry-focus-on-new-pharmacological-targets
#3
REVIEW
Filippo Caraci, Gian Marco Leggio, Salvatore Salomone, Filippo Drago
The approval of psychotropic drugs with novel mechanisms of action has been rare in recent years. To address this issue, further analysis of the pathophysiology of neuropsychiatric disorders is essential for identifying new pharmacological targets for psychotropic medications. In this report, we detail drug candidates being examined as treatments for psychiatric disorders. Particular emphasis is placed on agents with novel mechanisms of action that are being tested as therapies for depression, schizophrenia, or Alzheimer's disease...
2017: F1000Research
https://www.readbyqxmd.com/read/28405711/effect-of-clozapine-on-ketamine-induced-deficits-in-attentional-set-shift-task-in-mice
#4
M Szlachta, P Pabian, M Kuśmider, J Solich, M Kolasa, D Żurawek, M Dziedzicka-Wasylewska, A Faron-Górecka
RATIONALE: Clozapine (CLZ) is an effective treatment for schizophrenia, producing improvements in both negative symptoms and cognitive impairments. Cognitive impairments can be modelled in animals by ketamine (KET) and assessed using the attentional set-shift task (ASST). OBJECTIVE: Our first aim was to determine whether CLZ improves cognitive function and reverses KET-induced cognitive impairments using the ASST. Our second aim was to assess dose dependency of these effects...
April 12, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28384469/altered-cortical-ensembles-in-mouse-models-of-schizophrenia
#5
Jordan P Hamm, Darcy S Peterka, Joseph A Gogos, Rafael Yuste
In schizophrenia, brain-wide alterations have been identified at the molecular and cellular levels, yet how these phenomena affect cortical circuit activity remains unclear. We studied two mouse models of schizophrenia-relevant disease processes: chronic ketamine (KET) administration and Df(16)A(+/-), modeling 22q11.2 microdeletions, a genetic variant highly penetrant for schizophrenia. Local field potential recordings in visual cortex confirmed gamma-band abnormalities similar to patient studies. Two-photon calcium imaging of local cortical populations revealed in both models a deficit in the reliability of neuronal coactivity patterns (ensembles), which was not a simple consequence of altered single-neuron activity...
April 5, 2017: Neuron
https://www.readbyqxmd.com/read/28350371/a-neurophysiological-perspective-on-a-preventive-treatment-against-schizophrenia-using-transcranial-electric-stimulation-of-the-corticothalamic-pathway
#6
REVIEW
Didier Pinault
Schizophrenia patients are waiting for a treatment free of detrimental effects. Psychotic disorders are devastating mental illnesses associated with dysfunctional brain networks. Ongoing brain network gamma frequency (30-80 Hz) oscillations, naturally implicated in integrative function, are excessively amplified during hallucinations, in at-risk mental states for psychosis and first-episode psychosis. So, gamma oscillations represent a bioelectrical marker for cerebral network disorders with prognostic and therapeutic potential...
March 28, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28342013/the-evaluation-of-folic-acid-deficient-or-folic-acid-supplemented-diet-in-the-gestational-phase-of-female-rats-and-in-their-adult-offspring-subjected-to-an-animal-model-of-schizophrenia
#7
L Canever, C S V Alves, G Mastella, L Damázio, J V Polla, S Citadin, L A De Luca, A S Barcellos, M L Garcez, J Quevedo, J Budni, A I Zugno
Although folic acid (FA) supplementation is known to influence numerous physiological functions, especially during pregnancy, little is known about its direct effects on the mothers' health. However, this vitamin is essential for the health of the mother and for the normal growth and development of the fetus. Thus, the aim of this study was (1) to evaluate the cognitive effects and biochemical markers produced by the AIN-93 diet (control), the AIN-93 diet supplemented with different doses of FA (5, 10, and 50 mg/kg), and a FA-deficient diet during pregnancy and lactation in female mother rats (dams) and (2) to evaluate the effect of maternal diets on inflammatory parameters in the adult offspring which were subjected to an animal model of schizophrenia (SZ) induced by ketamine (Ket)...
March 24, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28323012/extracellular-matrix-alterations-in-the-ketamine-model-of-schizophrenia
#8
Gabriela Matuszko, Sebastiano Curreli, Rahul Kaushik, Axel Becker, Alexander Dityatev
The neural extracellular matrix (ECM) plays an important role in regulation of perisomatic GABAergic inhibition and synaptic plasticity in the hippocampus and cortex. Decreased labeling of perineuronal nets, a form of ECM predominantly associated with parvalbumin-expressing interneurons in the brain, has been observed in post-mortem studies of schizophrenia patients, specifically, in brain areas such as prefrontal cortex, entorhinal cortex, and amygdala. Moreover, glial ECM in the form of dandelion clock-like structures was reported to be altered in schizophrenia patients...
March 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28294453/a-translational-approach-for-nmda-receptor-profiling-as-a-vulnerability-biomarker-for-depression-and-schizophrenia
#9
Handan Gunduz-Bruce, Joshua Kenney, Suravi Changlani, Aldo Peixoto, Ralitza Gueorguieva, Cheryl Leone, Nina Stachenfeld
Altered N-methyl-D-aspartate (NMDA) receptor activity and glutamate signaling may underlie the pathogenesis of both schizophrenia and depression in subgroups of patients. In schizophrenia, pharmacologic modeling, postmortem and imaging data suggest reduced NMDA signaling. In contrast, recent clinical trials demonstrating the efficacy of the NMDA antagonist ketamine in severely depressed patients suggest increased NMDA receptor signaling. We conducted a proof of concept study to assess whether there is any in vivo evidence for an inverse association in depression and schizophrenia with respect to the NMDA receptor function...
March 13, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28286284/pre-clinical-investigation-of-diabetes-mellitus-as-a-risk-factor-for-schizophrenia
#10
Alexandra S Almeida Heylmann, Lara Canever, Katia Gress, Sarah T Gomes, Isadora Fachim, Carolina Michels, Geórgia C Stopassoli, Gustavo A Mastella, Amanda V Steckert, Adriani P Damiani, Vanessa M de Andrade, João Quevedo, Alexandra I Zugno
This study investigated the behavioral and biochemical parameters of DM1 as a risk factor in an animal model of schizophrenia (SZ). All groups: 1 Control (saline+saline); 2 Alloxan (alloxan+saline); 3 Ketamine (saline+ketamine); 4 (Alloxan+Ketamine) were fasted for a period of 18h before the subsequent induction of DM via a single intraperitoneal (i.p) injection of alloxan (150mg/kg). From the 4th to the 10th days, the animals were injected i.p with ketamine (25mg/kg) or saline, once a day, to induce a model of SZ and 30min after the last administration were subjected to behavioral testing...
March 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28252572/pharmacogenetics-of-ketamine-induced-emergence-phenomena-a-pilot-study
#11
Edwin N Aroke, Sybil L Crawford, Jennifer R Dungan
BACKGROUND: Up to 55% of patients who are administered ketamine experience an emergence phenomena (EP) that closely mimics schizophrenia and increases their risk of injury; however, to date, no studies have investigated genetic association of ketamine-induced EP in healthy patients. OBJECTIVES: The aim of the study was to investigate the feasibility and sample sizes required to explore the relationship between CYP2B6*6 and GRIN2B single-nucleotide polymorphisms and ketamine-induced EP...
March 2017: Nursing Research
https://www.readbyqxmd.com/read/28244984/schizophrenia-like-phenotypes-in-mice-with-nmda-receptor-ablation-in-intralaminar-thalamic-nucleus-cells-and-gene-therapy-based-reversal-in-adults
#12
K Yasuda, Y Hayashi, T Yoshida, M Kashiwagi, N Nakagawa, T Michikawa, M Tanaka, R Ando, A Huang, T Hosoya, T J McHugh, M Kuwahara, S Itohara
In understanding the mechanism of schizophrenia pathogenesis, a significant finding is that drug abuse of phencyclidine or its analog ketamine causes symptoms similar to schizophrenia. Such drug effects are triggered even by administration at post-adolescent stages. Both drugs are N-methyl-d-aspartate receptor (NMDAR) antagonists, leading to a major hypothesis that glutamate hypofunction underlies schizophrenia pathogenesis. The precise region that depends on NMDAR function, however, is unclear. Here, we developed a mouse strain in which NMDARs in the intralaminar thalamic nuclei (ILN) were selectively disrupted...
February 28, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28243163/drug-abuse-and-psychosis-new-insights-into-drug-induced-psychosis
#13
REVIEW
Suji Ham, Tae Kyoo Kim, Sooyoung Chung, Heh-In Im
Addictive drug use or prescribed medicine abuse can cause psychosis. Some representative symptoms frequently elicited by patients with psychosis are hallucination, anhedonia, and disrupted executive functions. These psychoses are categorized into three classifications of symptoms: positive, negative, and cognitive. The symptoms of DIP are not different from the symptoms of schizophrenia, and it is difficult to distinguish between them. Due to this ambiguity of distinction between the DIP and schizophrenia, the DIP animal model has been frequently used as the schizophrenia animal model...
February 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28242871/attenuation-of-ketamine-induced-impairment-in-verbal-learning-and-memory-in-healthy-volunteers-by-the-ampa-receptor-potentiator-pf-04958242
#14
M Ranganathan, N DeMartinis, B Huguenel, F Gaudreault, M M Bednar, C L Shaffer, S Gupta, J Cahill, M A Sherif, J Mancuso, L Zumpano, D C D'Souza
There is a need to develop treatments for cognitive impairment associated with schizophrenia (CIAS). The significant role played by N-methyl-d-aspartate receptors (NMDARs) in both the pathophysiology of schizophrenia and in neuronal plasticity suggests that facilitation of NMDAR function might ameliorate CIAS. One strategy to correct NMDAR hypofunction is to stimulate α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors (AMPARs) as AMPAR and NMDAR functioning are coupled and interdependent. In rats and nonhuman primates (NHP), AMPAR potentiators reduce spatial working memory deficits caused by the nonselective NMDAR antagonist ketamine...
February 28, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28241130/nardostachys-jatamansi-targets-bdnf-trkb-to-alleviate-ketamine-induced-schizophrenia-like-symptoms-in-rats
#15
Anjali Janardhanan, Anjana Sadanand, Arambakkam Janardhanam Vanisree
OBJECTIVE: Schizophrenia, a common neurological disorder appearing in the late teens or early adulthood, is characterized by disorganized thinking, behaviour, and perception of emotions. Aberrant N-methyl-D-aspartate (NMDA) receptor-mediated synaptic plasticity is a major pathological event here due to dysfunction of dopamine and glutamate transmission at NMDA receptors. De-regulated brain-derived neurotrophic factor (BDNF), i.e., its signalling through the tropomyosin receptor kinase B (TrkB) receptor, is a major feature of schizophrenia...
2016: Neuropsychobiology
https://www.readbyqxmd.com/read/28229913/increased-risk-of-developing-schizophrenia-in-animals-exposed-to-cigarette-smoke-during-the-gestational-period
#16
Alexandra I Zugno, Mariana B Oliveira, Gustavo A Mastella, Alexandra S A Heylmann, Lara Canever, Felipe D Pacheco, Louyse S Damazio, Sullivan A Citadin, Luiz Antonio de Lucca, Lutiana Roque Simões, Fernanda Malgarin, Josiane Budni, Tatiana Barichello, Patricia F Schuck, João Quevedo
Cigarette smoking during the prenatal period has been investigated as a causative factor of obstetric abnormalities, which lead to cognitive and behavioural changes associated with schizophrenia. The aim of this study was to investigate behaviour and AChE activity in brain structures in adult rats exposed to cigarette smoke during the prenatal period. Pregnant rats were divided into non-PCSE (non-prenatal cigarette smoke exposure) and PCSE (prenatal cigarette smoke exposure) groups. On post-natal day 60, the rats received saline or ketamine for 7days and were subjected to behavioural tasks...
April 3, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28211248/anesthetic-considerations-for-pediatric-electroconvulsive-therapy
#17
REVIEW
Andrew D Franklin, Jenna H Sobey, Eric T Stickles
Electroconvulsive therapy is being used more frequently in the treatment of many chronic and acute psychiatric illnesses in children. The most common psychiatric indications for pediatric electroconvulsive therapy are refractory depression, bipolar disorder, schizophrenia, catatonia, and autism. In addition, a relatively new indication is the treatment of pediatric refractory status epilepticus. The anesthesiologist may be called upon to assist in the care of this challenging and vulnerable patient population...
May 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28190661/the-novel-antipsychotic-drug-brexpiprazole-alone-and-in-combination-with-escitalopram-facilitates-prefrontal-glutamatergic-transmission-via-a-dopamine-d1-receptor-dependent-mechanism
#18
Carl Björkholm, Monica M Marcus, Åsa Konradsson-Geuken, Kent Jardemark, Torgny H Svensson
Brexpiprazole (Rexulti(®)), a novel D2/3 receptor (R) partial agonist, was recently approved as monotherapy for schizophrenia, demonstrating effectiveness against both positive and negative symptoms, and also approved as add-on treatment to antidepressant drugs, inducing a potent antidepressant effect with a faster onset compared to an antidepressant given alone. Moreover, brexpiprazole has demonstrated pro-cognitive effects in preclinical studies. To explore whether the observed effects may be mediated via modulation of prefrontal glutamatergic transmission, we investigated the effect of brexpiprazole, alone and in combination with the SSRI escitalopram, on prefrontal glutamatergic transmission using in vitro electrophysiological intracellular recordings of deep layer pyramidal cells of the rat medial prefrontal cortex (mPFC)...
February 9, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28190425/i-predict-therefore-i-am-perturbed-predictive-coding-under-ketamine-and-in-schizophrenia
#19
Philip R Corlett
No abstract text is available yet for this article.
March 15, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28125634/pacap-protects-adult-neural-stem-cells-from-the-neurotoxic-effect-of-ketamine-associated-with-decreased-apoptosis-er-stress-and-mtor-pathway-activation
#20
Shiva Mansouri, Ingrid Agartz, Sven-Ove Ögren, Cesare Patrone, Mathias Lundberg
Ketamine administration is a well-established approach to mimic experimentally some aspects of schizophrenia. Adult neurogenesis dysregulation is associated with psychiatric disorders, including schizophrenia. The potential role of neurogenesis in the ketamine-induced phenotype is largely unknown. Recent results from human genetic studies have shown the pituitary adenylate cyclase-activating polypeptide (PACAP) gene is a risk factor for schizophrenia. Its potential role on the regulation of neurogenesis in experimental model of schizophrenia remains to be investigated...
2017: PloS One
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