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Clozapine

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https://www.readbyqxmd.com/read/28226264/leukocyte-telomere-length-in-hispanic-schizophrenia-patients-under-treatment-with-olanzapine
#1
Nancy Monroy-Jaramillo, Yaneth Rodríguez-Agudelo, Luis Carlos Aviña-Cervantes, David L Roberts, Dawn I Velligan, Consuelo Walss-Bass
Different lines of evidence indicate that patients with schizophrenia (SZ) exhibit accelerated aging. Leukocyte telomere length (TL), an aging marker, is associated with age-related and chronic pathologies, including schizophrenia. We analyzed leukocyte TL in 170 SZ patients of Hispanic ancestry grouped based on antipsychotic treatment, compared to 126 matched controls. The group under treatment with atypical antipsychotics was further subdivided according to the risk of medication to cause metabolic syndrome (MetS)...
February 10, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28225745/predictors-of-nonhospitalization-and-functional-response-in-clozapine-treatment-a-nationwide-population-based-cohort-study
#2
Ole Köhler-Forsberg, Henriette T Horsdal, Sophie E Legge, James H MacCabe, Christiane Gasse
BACKGROUND: Clozapine remains the only evidence-based treatment for treatment-resistant schizophrenia, and prediction of clozapine response is important in developing stratified treatment. We studied potential predictors of clozapine response, applying functional assessments as well as service use. PROCEDURES: We performed a nationwide cohort study among all individuals diagnosed with schizophrenia in Denmark after 1995 (age, ≥18 years) who initiated clozapine treatment between 2004 and 2011 with a Global Assessment of Functioning (GAF-F) score registered at clozapine initiation...
April 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28225439/tachycardia-in-patients-treated-with-clozapine-versus-antipsychotic-long-acting-injections
#3
Björn M Nilsson, Oscar Edström, Leif Lindström, Petter Wernegren, Robert Bodén
Tachycardia is a known adverse effect during clozapine treatment. However, prevalence reported differs widely between studies and hitherto there are no studies comparing clozapine-treated patients with a similar control group. The present study was carried out to assess the prevalence of tachycardia in patients treated with clozapine and antipsychotic long-acting injections (LAI). Data on heart rate (HR), concomitant medication, and relevant anthropometric and laboratory measurements were collected for all clozapine-treated patients (n=174) in a defined catchment area and compared with data on patients treated with LAI (n=87)...
February 20, 2017: International Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28224085/authors-reply-clozapine-for-mitochondrial-psychosis
#4
Caroline Demily, Charlyne Duwime, Alice Poisson, Nathalie Boddaert, Arnold Munnich
No abstract text is available yet for this article.
March 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/28221369/chemistry-based-molecular-signature-underlying-the-atypia-of-clozapine
#5
T Cardozo, E Shmelkov, K Felsovalyi, J Swetnam, T Butler, D Malaspina, S V Shmelkov
The central nervous system is functionally organized as a dynamic network of interacting neural circuits that underlies observable behaviors. At higher resolution, these behaviors, or phenotypes, are defined by the activity of a specific set of biomolecules within those circuits. Identification of molecules that govern psychiatric phenotypes is a major challenge. The only organic molecular entities objectively associated with psychiatric phenotypes in humans are drugs that induce psychiatric phenotypes and drugs used for treatment of specific psychiatric conditions...
February 21, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28220613/comparison-of-treatment-patterns-in-schizophrenia-between-china-and-japan-2001-2009
#6
Yu-Tao Xiang, Takahiro A Kato, Taishiro Kishimoto, Gabor S Ungvari, Helen F K Chiu, Tian-Mei Si, Shu-Yu Yang, Senta Fujii, Chee H Ng, Naotaka Shinfuku
INTRODUCTION: To date no study has compared the treatment patterns for schizophrenia specifically between China and Japan. This study examined the cross-national differences in the use of psychotropic drugs and electroconvulsive therapy (ECT) in schizophrenia. METHOD: Data on 3248 schizophrenia inpatients (n = 1524 in China and n = 1724 in Japan) were collected by either chart review or interviews during the designated 3 study periods between 2001 and 2009. Patients' socio-demographic and clinical characteristics, prescriptions of psychotropic drugs, and ECT use were recorded using a standardized protocol and data collection procedure...
February 20, 2017: Asia-Pacific Psychiatry: Official Journal of the Pacific Rim College of Psychiatrists
https://www.readbyqxmd.com/read/28220347/stercoral-colitis-mimicking-appendicitis
#7
Abdelghafour Elkoundi, Mustapha Bensghir, Charki Haimeur
BACKGROUND: Stercoral colitis is an inflammatory process involving the colonic wall related to fecal impaction. This rare condition is associated with high morbidity-mortality. FINDINGS: We report a case of a 78-year-old woman with a history of dementia under clozapine who presented a clinical and sonographic presentation of acute appendicitis. The worsening of her clinical condition prompted us to review our diagnosis and modify our approach using the CT scan which was consistent with stercoral colitis...
December 2017: International Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28219485/acute-antipsychotic-treatment-of-children-and-adolescents-with-schizophrenia-spectrum-disorders-a-systematic-review-and-network-meta-analysis
#8
REVIEW
Anne Katrine Pagsberg, Simon Tarp, Dorte Glintborg, Anne Dorte Stenstrøm, Anders Fink-Jensen, Christoph Ulrich Correll, Robin Christensen
OBJECTIVE: To determine the comparative efficacy and safety of antipsychotics for youth with early-onset schizophrenia using network meta-analytic methods combining direct and indirect trial data. METHOD: The authors systematically searched MEDLINE, the Cochrane Library, and clinicaltrials.gov and selected randomized controlled trials allocating youth with schizophrenia spectrum disorders to a (non-clozapine) antipsychotic versus placebo or another antipsychotic...
March 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28216047/serotonin-2a-homodimers-are-needed-for-signalling-via-both-phospholipase-a2-and-phospholipase-c-in-transfected-cho-cells
#9
Alba Iglesias, Marta Cimadevila, María Isabel Cadavid, María Isabel Loza, José Brea
Different ligands differentially activate phospholipase A2 (PLA2) and phospholipase C (PLC) signalling pathways that are coupled to the serotonin 2A (5-HT2A) receptor, a class-A G-protein coupled receptor (GPCR). The serotonin 5-HT2A receptor has been shown to be expressed as a homodimer displaying some ligands negative cooperativity between protomers in the PLA2 signalling pathway. We hypothesized that the homodimeric complex is the minimum functional unit required for activation of the PLA2 and PLC pathways by the serotonin 5-HT2A receptor...
February 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28210568/clozapine-induced-hypersensitivity-myocarditis-presenting-as-sudden-cardiac-death
#10
Natraj Katta, Sudarshan Balla, Kul Aggarwal
Hypersensitivity myocarditis is a rare but serious adverse effect of clozapine, a commonly used psychiatric drug. We report the case of sudden cardiac death from clozapine-induced hypersensitivity myocarditis diagnosed at autopsy. A 54-year-old Caucasian male on clozapine therapy for bipolar disorder presented with a sudden onset of shortness of breath. Laboratory studies were significant for elevated N-terminal prohormone of brain natriuretic peptide. During his hospital stay, the patient died of sudden cardiac arrest from ventricular tachycardia...
October 2016: Autopsy & case reports
https://www.readbyqxmd.com/read/28209485/effects-of-clozapine-on-adipokine-secretions-productions-and-lipid-droplets-in-3t3-l1-adipocytes
#11
Tomomi Tsubai, Akira Yoshimi, Yoji Hamada, Makoto Nakao, Hiroshi Arima, Yutaka Oiso, Yukihiro Noda
Clozapine, a second-generation antipsychotic (SGA), is a cause of side effects related to metabolic syndrome. The participation of serotonin 5-HT2C and histamine H1 receptors in the central nervous system has been reported as a mechanism of the weight gain caused by clozapine. In the present study, we investigated the direct pharmacological action of clozapine on the 3T3-L1 adipocytes and compared it to that of blonanserin, an SGA with low affinity for both receptors. Short-term exposure to clozapine decreased secretion and mRNA expression of leptin...
January 28, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28202410/atypical-antipsychotic-clozapine-reversed-deficit-on-prepulse-inhibition-of-the-acoustic-startle-reflex-produced-by-microinjection-of-doi-into-the-inferior-colliculus-in-rats
#12
Rodolpho Pereira de Oliveira, Karen Yuriko Nagaishi, Regina Cláudia Barbosa Silva
Dysfunctions of the serotonergic system have been suggested to be important in the neurobiology of schizophrenia. Patients with schizophrenia exhibit deficits in an operational measure of sensorimotor gating: prepulse inhibition (PPI) of startle. PPI is the normal reduction in the startle response caused by a low intensity non-startling stimulus (prepulse) which is presented shortly before the startle stimulus (pulse). The hallucinogen 2,5-dimethoxy-4-iodoamphetamine (DOI), a 5-hydroxytryptamine(HT)2 receptor agonist disrupted PPI in rats...
February 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28202290/effect-of-psychotropic-drug-treatment-on-sterol-metabolism
#13
Željka Korade, Wei Liu, Emily B Warren, Kristan Armstrong, Ned A Porter, Christine Konradi
Cholesterol metabolism is vital for brain function. Previous work in cultured cells has shown that a number of psychotropic drugs inhibit the activity of 7-dehydrocholesterol reductase (DHCR7), an enzyme that catalyzes the final steps in cholesterol biosynthesis. This leads to the accumulation of 7-dehydrocholesterol (7DHC), a molecule that gives rise to oxysterols, vitamin D, and atypical neurosteroids. We examined levels of cholesterol and the cholesterol precursors desmosterol, lanosterol, 7DHC and its isomer 8-dehydrocholesterol (8DHC), in blood samples of 123 psychiatric patients on various antipsychotic and antidepressant drugs, and 85 healthy controls, to see if the observations in cell lines hold true for patients as well...
February 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28197007/use-of-clozapine-alongside-chemotherapy-in-a-treatment-resistant-bipolar-disorder-patient-with-ovarian-carcinoma-a-case-report-and-brief-review
#14
Ashish Pakhre, Aarya Krishnan, Raman Deep Pattanayak, Sudhir K Khandelwal
Regular monitoring of blood counts ensures the safety of clozapine use; however, certain clinical situations may pose a dilemma for management such as use of clozapine in the presence of myelosuppressive chemotherapy. Further, there is very limited literature to guide such decisions. We report a case of a clozapine-stabilized, treatment-resistant bipolar disorder patient with ovarian carcinoma requiring chemotherapy. The clinical challenges are discussed in light of a brief review of the available reports.
October 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28197002/an-exploratory-study-for-bladder-dysfunction-in-atypical-antipsychotic-emergent-urinary-incontinence
#15
Preeti Sinha, Anupam Gupta, V Senthil Kumar Reddi, Chittaranjan Andrade
INTRODUCTION: This is an exploratory study, which aimed to analyze urodynamic findings in patients who are on atypical antipsychotics and present with urinary incontinence (UI) in order to understand the mechanisms of antipsychotic-emergent UI. PATIENTS AND METHODS: Eight patients (34 ± 7.6 years; five males and three females) diagnosed with schizophrenia or other psychotic disorders, who were on risperidone, olanzapine, or clozapine monotherapy and having UI were recruited...
October 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28196880/agrp-to-kiss1-neuron-signaling-links-nutritional-state-and-fertility
#16
Stephanie L Padilla, Jian Qiu, Casey C Nestor, Chunguang Zhang, Arik W Smith, Benjamin B Whiddon, Oline K Rønnekleiv, Martin J Kelly, Richard D Palmiter
Mammalian reproductive function depends upon a neuroendocrine circuit that evokes the pulsatile release of gonadotropin hormones (luteinizing hormone and follicle-stimulating hormone) from the pituitary. This reproductive circuit is sensitive to metabolic perturbations. When challenged with starvation, insufficient energy reserves attenuate gonadotropin release, leading to infertility. The reproductive neuroendocrine circuit is well established, composed of two populations of kisspeptin-expressing neurons (located in the anteroventral periventricular hypothalamus, Kiss1(AVPV), and arcuate hypothalamus, Kiss1(ARH)), which drive the pulsatile activity of gonadotropin-releasing hormone (GnRH) neurons...
February 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28196460/prescribing-of-clozapine-and-antipsychotic-polypharmacy-for-schizophrenia-in-a-large-medicaid-program
#17
Yan Tang, Marcela Horvitz-Lennon, Walid F Gellad, Judith R Lave, Chung-Chou H Chang, Sharon-Lise Normand, Julie M Donohue
OBJECTIVE: Underuse of clozapine and overuse of antipsychotic polypharmacy are both indicators of poor quality of care. This study examined variation in prescribing clozapine and antipsychotic polypharmacy across providers, as well as factors associated with these practices. METHODS: Using 2010-2012 Pennsylvania Medicaid data, prescribers were identified if they wrote antipsychotic prescriptions for ten or more nonelderly adult patients with schizophrenia annually...
February 15, 2017: Psychiatric Services: a Journal of the American Psychiatric Association
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/28189104/generic-method-for-the-absolute-quantification-of-glutathione-s-conjugates-application-to-the-conjugates-of-acetaminophen-clozapine-and-diclofenac
#19
Michiel W den Braver, Nico P E Vermeulen, Jan N M Commandeur
Modification of cellular macromolecules by reactive drug metabolites is considered to play an important role in the initiation of tissue injury by many drugs. Detection and identification of reactive intermediates is often performed by analyzing the conjugates formed after trapping by glutathione (GSH). Although sensitivity of modern mass spectrometrical methods is extremely high, absolute quantification of GSH-conjugates is critically dependent on the availability of authentic references. Although (1)H NMR is currently the method of choice for quantification of metabolites formed biosynthetically, its intrinsically low sensitivity can be a limiting factor in quantification of GSH-conjugates which generally are formed at low levels...
February 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28182153/switching-bipolar-disorder-patients-treated-with-clozapine-to-another-antipsychotic-medication-a-mirror-image-study
#20
Petru Ifteni, Andreea Teodorescu, Marius Alexandru Moga, Alina Mihaela Pascu, Roxana Steliana Miclaus
Bipolar disorder (BD) is associated with periodic symptom exacerbations, leading to functional impairment, and increased risk of suicide. Although clozapine has never been approved for the treatment of BD, it is occasionally used in severe mania. The aim of the study is to evaluate the risks and benefits of switching clozapine in remitted BD patients. This is an observational, mirror image study of 62 consecutive remitted BD outpatients treated with clozapine. Twenty-five patients were switched to another antipsychotic following a change in a drug reimbursement rule, while 37 continued on clozapine...
2017: Neuropsychiatric Disease and Treatment
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