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Antipsychotic response

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https://www.readbyqxmd.com/read/28549722/deficient-prepulse-inhibition-in-schizophrenia-in-a-multi-site-cohort-internal-replication-and-extension
#1
Neal R Swerdlow, Gregory A Light, Michael L Thomas, Joyce Sprock, Monica E Calkins, Michael F Green, Tiffany A Greenwood, Raquel E Gur, Ruben C Gur, Laura C Lazzeroni, Keith H Nuechterlein, Allen D Radant, Larry J Seidman, Larry J Siever, Jeremy M Silverman, William S Stone, Catherine A Sugar, Debby W Tsuang, Ming T Tsuang, Bruce I Turetsky, David L Braff
BACKGROUND: The Consortium on the Genetics of Schizophrenia (COGS) collected case-control endophenotype and genetic information from 2457 patients and healthy subjects (HS) across 5 test sites over 3.5 years. Analysis of the first "wave" (W1) of 1400 subjects identified prepulse inhibition (PPI) deficits in patients vs. HS. Data from the second COGS "wave" (W2), and the combined W(1+2), were used to assess: 1) the replicability of PPI deficits in this design; 2) the impact of response criteria on PPI deficits; and 3) PPI in a large cohort of antipsychotic-free patients...
May 23, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28549480/improving-the-appropriateness-of-antipsychotic-prescribing-in-nursing-homes-a-mixed-methods-process-evaluation-of-an-academic-detailing-intervention
#2
L Desveaux, M Saragosa, J Rogers, L Bevan, H Loshak, A Moser, S Feldman, L Regier, L Jeffs, N M Ivers
BACKGROUND: In 2014, nursing home administration and government officials were facing increasing public and media scrutiny around the variation of antipsychotic medication (APM) prescribing across Ontario nursing homes. In response, policy makers partnered to test an academic detailing (AD) intervention to address appropriate prescribing of APM in nursing homes in a cluster-randomized trial. This mixed-methods study aimed to explore how and why the AD intervention may have resulted in changes in the nursing home context...
May 26, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28541090/sixty-years-of-placebo-controlled-antipsychotic-drug-trials-in-acute-schizophrenia-systematic-review-bayesian-meta-analysis-and-meta-regression-of-efficacy-predictors
#3
Stefan Leucht, Claudia Leucht, Maximilian Huhn, Anna Chaimani, Dimitris Mavridis, Bartosz Helfer, Myrto Samara, Matteo Rabaioli, Susanne Bächer, Andrea Cipriani, John R Geddes, Georgia Salanti, John M Davis
OBJECTIVE: Antipsychotic drug efficacy may have decreased over recent decades. The authors present a meta-analysis of all placebo-controlled trials in patients with acute exacerbations of schizophrenia, and they investigate which trial characteristics have changed over the years and which are moderators of drug-placebo efficacy differences. METHOD: The search included multiple electronic databases. The outcomes were overall efficacy (primary outcome); responder and dropout rates; positive, negative, and depressive symptoms; quality of life; functioning; and major side effects...
May 25, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28529220/clinical-correlates-of-treatment-response-among-patients-with-schizophrenia-in-a-tertiary-nigerian-hospital
#4
Mark Sunday Ezeme, Richard Uwakwe, Appolos Chidi Ndukuba, Monday N Igwe, Paul Chigozie Odinka, Kennedy Amadi, Nichodemus O Obayi
A significant proportion of patients treated for schizophrenia respond poorly to medication. Few studies have systematically examined the impact of clinical characteristics of patients to antipsychotic response in our environment. The study aimed to identify clinical variables associated with response in patients with schizophrenia. A total of 172 participants diagnosed with schizophrenia, placed on antipsychotics, who presented for the first time to the hospital or have stopped medication in the preceding six months, whose responses were assessed after four to six weeks were studied...
2017: Journal of Health Care for the Poor and Underserved
https://www.readbyqxmd.com/read/28523839/algorithm-based-pharmacotherapy-for-first-episode-schizophrenia-involuntarily-hospitalized-a-retrospective-analysis-of-real-world-practice
#5
Bunta Yoshimura, Kojiro Sato, Manabu Takaki, Norihito Yamada
BACKGROUND: Little is known about the clinical outcomes of severely ill patients with first-episode schizophrenia spectrum disorders (FES) who are considered to lack the capacity to consent to clinical trials. We investigated the feasibility of an algorithm-based pharmacotherapy (ABP) and clinical outcomes of patients with FES involuntarily hospitalized and treated with ABP. METHODS: We conducted a retrospective chart review of 160 patients admitted involuntarily between October 2012 and October 2015...
May 19, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/28522313/neurotensin-in-the-nucleus-accumbens-reverses-dopamine-supersensitivity-evoked-by-antipsychotic-treatment
#6
Alice Servonnet, Ellie-Anna Minogianis, Claude Bouchard, Anne-Marie Bédard, Daniel Lévesque, Pierre-Paul Rompré, Anne-Noël Samaha
Long-term exposure to antipsychotics like haloperidol can increase sensitivity to dopamine agonist stimulation. This could contribute to treatment failure and increase relapse to psychosis. Chronic antipsychotic treatment elevates neurotensin levels in the nucleus accumbens (NAc), where the neuropeptide modulates dopamine function by signalling through NTS1 receptors. We hypothesized that increasing neurotensin activity in the NAc attenuates the expression of antipsychotic-induced dopamine supersensitivity, which is indicated by a potentiated psychomotor response to amphetamine...
May 15, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28514486/efficacy-of-42-pharmacologic-cotreatment-strategies-added-to-antipsychotic-monotherapy-in-schizophrenia-systematic-overview-and-quality-appraisal-of-the-meta-analytic-evidence
#7
Christoph U Correll, Jose M Rubio, Gabriella Inczedy-Farkas, Michael L Birnbaum, John M Kane, Stefan Leucht
Importance: Limited treatment responses in schizophrenia prompted the testing of combining an antipsychotic drug treatment with a second psychotropic medication. A comprehensive evaluation of the efficacy of multiple medication combinations is missing. Objective: To summarize and compare the meta-analytically determined efficacy of pharmacologic combination strategies of antipsychotic drugs in adults with schizophrenia. Data Sources: Systematic search of PubMed and PsycInfo until May 13, 2016...
May 17, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/28512255/immune-consequences-of-penfluridol-treatment-associated-with-inhibition-of-glioblastoma-tumor-growth
#8
Alok Ranjan, Stephen Wright, Sanjay K Srivastava
Glioblastoma is the most common and lethal brain tumor associated with only 12% median survival rate of patients. Despite the development of advanced surgical, radiation or use of combinations of anti-cancer drugs, treatment for glioblastoma patients is still a challenge. The major contributing factor in glioblastoma progression and resistive nature is its ability to evade the immune surveillance. Hence, modulating the immune system in glioblastoma tumors could be an important strategy for anticancer therapeutics...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28509906/therapeutic-efficacy-of-atypical-antipsychotic-drugs-by-targeting-multiple-stress-related-metabolic-pathways
#9
H L Cai, P Jiang, Q Y Tan, R L Dang, M M Tang, Y Xue, Y Deng, B K Zhang, P F Fang, P Xu, D X Xiang, H D Li, J K Yao
Schizophrenia (SZ) is considered to be a multifactorial brain disorder with defects involving many biochemical pathways. Patients with SZ show variable responses to current pharmacological treatments of SZ because of the heterogeneity of this disorder. Stress has a significant role in the pathophysiological pathways and therapeutic responses of SZ. Atypical antipsychotic drugs (AAPDs) can modulate the stress response of the hypothalamic-pituitary-adrenal (HPA) axis and exert therapeutic effects on stress by targeting the prefrontal cortex (PFC) and hippocampus...
May 16, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28508933/genetic-variants-within-key-nodes-of-the-cascade-of-antipsychotic-mechanisms-effects-on-antipsychotic-response-and-schizophrenia-psychopathology-in-a-naturalistic-treatment-setting-in-two-independent-korean-and-italian-samples
#10
Marco Calabrò, Stefano Porcelli, Concetta Crisafulli, Sheng-Min Wang, Soo-Jung Lee, Changsu Han, Ashwin A Patkar, Prakash S Masand, Diego Albani, Ilaria Raimondi, Gianluigi Forloni, Sofia Bin, Alessandro Mattiaccio, Vilma Mantovani, Tae-Youn Jun, Chi-Un Pae, Alessandro Serretti
INTRODUCTION: Schizophrenia (SCZ) is one of the most disabling psychiatric disorders. Genetic factors play an important role in both SCZ liability and its treatment outcome. In the present paper, we investigated the effects of several single nucleotide polymorphisms (SNPs) within ten strong candidate genes involved with antipsychotics (APs) mechanisms of action. METHODS: Two independent samples were investigated in the present study. Totals of 176 SCZ subjects and 326 controls of Korean ancestry, and 83 SCZ subjects and 194 controls of Italian ancestry were recruited and genotyped...
May 16, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28503156/effects-of-antipsychotic-administration-on-brain-glutamate-in-schizophrenia-a-systematic-review-of-longitudinal-1-h-mrs-studies
#11
REVIEW
Alice Egerton, Akarmi Bhachu, Kate Merritt, Grant McQueen, Agata Szulc, Philip McGuire
Schizophrenia is associated with brain glutamate dysfunction, but it is currently unclear whether antipsychotic administration can reduce the extent of glutamatergic abnormality. We conducted a systematic review of proton magnetic resonance spectroscopy ((1)H-MRS) studies examining the effects of antipsychotic treatment on brain glutamate levels in schizophrenia. The Medline database was searched to identify relevant articles published until December 2016. Inclusion required that studies examined longitudinal changes in brain glutamate metabolites in patients with schizophrenia before and after initiation of first antipsychotic treatment or a switch in antipsychotic treatment...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28500893/glucagon-receptor-knockout-mice-are-protected-against-acute-olanzapine-induced-hyperglycemia
#12
Laura N Castellani, Willem T Peppler, Charles D Sutton, Jamie Whitfield, Maureen J Charron, David C Wright
OBJECTIVES: To determine if glucagon is involved in mediating the increase in blood glucose levels caused by the second-generation antipsychotic drug olanzapine. MATERIALS AND METHODS: Whole body glucagon receptor deficient mice (Gcgr(-/-)) or WT littermate controls were injected with olanzapine (5mg/kg BW IP) and changes in blood glucose measured over the following 120min. Separate cohorts of mice were treated with olanzapine and changes in pyruvate tolerance, insulin tolerance and whole body substrate oxidation were determined...
May 3, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28499974/prefrontal-cortical-glutathione-dependent-defense-and-proinflammatory-mediators-in-chronically-isolated-rats-modulation-by-fluoxetine-or-clozapine
#13
Nevena Todorović, Dragana Filipović
Chronic psychosocial stress modulates brain antioxidant systems and causes neuroinflammation that plays a role in the pathophysiology of depression. Although the antidepressant fluoxetine (FLX) represents the first-line treatment for depression and the atypical antipsychotic clozapine (CLZ) is considered as a second-line treatment for psychotic disorders, the downstream mechanisms of action of these treatments, beyond serotonergic or dopaminergic signaling, remain elusive. We examined behavioral changes, glutathione (GSH)-dependent defense and levels of proinflammatory mediators in the prefrontal cortex (PFC) of adult male Wistar rats exposed to 21days of chronic social isolation (CSIS)...
May 10, 2017: Neuroscience
https://www.readbyqxmd.com/read/28499900/lurasidone-in-post-menopausal-females-with-major-depressive-disorder-with-mixed-features-post-hoc-analysis-of-a-placebo-controlled-trial
#14
John Sramek, Anthony Loebel, Michael Murphy, Yongcai Mao, Andrei Pikalov, Neal R Cutler
BACKGROUND: Several studies have found that depressed, post-menopausal females may respond differently to antidepressants compared to pre-menopausal females. The atypical antipsychotic lurasidone, whose mechanism of action differs from SSRIs and other standard antidepressants, was shown in a 6-week randomized, flexible-dose, placebo-controlled study (n=209), to be effective in treating major depressive disorder (MDD) with mixed features (subthreshold hypomanic symptoms). This post-hoc analysis assessed the efficacy of lurasidone in this study by menopausal status...
May 9, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28495491/a-computational-algorithm-for-personalized-medicine-in-schizophrenia
#15
Beom S Lee, Roger S McIntyre, James E Gentle, Nan Sook Park, David A Chiriboga, Yena Lee, Sabrina Singh, Marie A McPherson
Despite advances in sequencing candidate genes and whole genomes, no method has accurately predicted who will or will not benefit from a specific antipsychotic medication among patients with schizophrenia. We propose a computational algorithm that utilizes a person-centered approach that directly identifies individual patients who will respond to a specific antipsychotic medication. The algorithm was applied to the data obtained from the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) study...
May 8, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28490005/opposing-effects-of-valproic-acid-treatment-mediated-by-histone-deacetylase-inhibitor-activity-in-four-transgenic-x-laevis-models-of-retinitis-pigmentosa
#16
Ruanne Y J Vent-Schmidt, Runxia H Wen, Zusheng Zong, Colette N Chiu, Beatrice M Tam, Christopher G May, Orson L Moritz
Retinitis pigmentosa (RP) is an inherited retinal degeneration (RD) that leads to blindness for which no treatment is available. RP is frequently caused by mutations in Rhodopsin; in some animal models, RD is exacerbated by light. Valproic acid (VPA) is a proposed treatment for RP and other neurodegenerative disorders, with a phase II trial for RP under way. However, the therapeutic mechanism is unclear, with minimal research supporting its use in RP. We investigated the effects of VPA on Xenopus laevis models of RP expressing human P23H, T17M, T4K, and Q344ter rhodopsins, which are associated with RP in humans...
January 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28489133/association-between-antipsychotics-and-cardiovascular-adverse-events-a-systematic-review
#17
Ana Amancio Santos Da Silva, Marina Viegas Moura Rezende Ribeiro, Célio Fernando de Sousa-Rodrigues, Fabiano Timbó Barbosa
Objective: Determine whether there is an association between the risk of cardiovascular adverse events and the use of antipsychotic agents. Method: Analysis of original articles retrieved from the following databases: LILACS, PubMed, Cochrane Controlled Trials Clinical Data Bank (CENTRAL) and PsycINFO, without language restriction, dated until November 2015. After screening of 2,812 studies, three cohort original articles were selected for quality analysis. Results: 403,083 patients with schizophrenia and 119,015 participants in the control group data were analyzed...
March 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28487497/the-involvement-of-darpp-32-in-the-pathophysiology-of-schizophrenia
#18
REVIEW
Haitao Wang, Mohd Farhan, Jiangping Xu, Philip Lazarovici, Wenhua Zheng
Schizophrenia is one of the most devastating heterogeneous psychiatric disorders. The dopamine hypothesis is the longest standing pathoetiologic theory of schizophrenia based on neurochemical evidences of elevated brain striatal dopamine synthesis capacity and increased dopamine release in response to stress. Dopamine and cyclic AMP-regulated phosphoprotein of relative molecular mass 32,000 (DARPP-32) is a cytosolic protein highly enriched in the medium spiny neurons of the neostriatum, considered as the most important integrator between the cortical input and the basal ganglia, and associated with motor control...
April 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28486094/a-pharmacodynamic-modelling-and-simulation-study-identifying-gender-differences-of-daily-olanzapine-dose-and-dopamine-d2-receptor-occupancy
#19
Andy R Eugene, Jolanta Masiak
BACKGROUND: Gender differences in treatment response rates for patients treated with antipsychotics are known. However, the literature lacks a pharmacodynamic model to allow for gender-based clinical trial simulations from modelling parameters for Olanzapine and dopamine D2 receptor occupancy. Thus, the primary aim of this analysis is to test and quantify the effect of gender on the pharmacodynamics of Olanzapine. METHODS: Population pharmacodynamic modelling was performed using non-linear mixed effects modelling in MONOLIX, while the Clinical Trial Simulations were performed using R for statistical programming...
May 9, 2017: Nordic Journal of Psychiatry
https://www.readbyqxmd.com/read/28483714/purposeless-oral-activity-induced-by-meta-chlorophenylpiperazine-m-cpp-undefined-tic-like-behaviors
#20
Deborah S Kreiss, Philippe De Deurwaerdère
BACKGROUND: The pathophysiological hypothesis underlying tic disorders in Tourette syndrome (TS) is that basal ganglia are not capable of properly filtering cortical information, leading patients with difficulties in inhibiting unwanted behaviors or impulses. One of the main challenges for furthering such a hypothesis is to find appropriate animal models summarizing some aspects of the disease. METHODS: It has been established for more than 25 years in rodents that the prototypical serotonin (5-HT) agonist meta-chlorophenylpiperazine (m-CPP) elicits purposeless oral movements including chewing behavior...
May 5, 2017: Journal of Neuroscience Methods
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