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https://www.readbyqxmd.com/read/28734907/predicting-relapse-in-schizophrenia-is-bdnf-a-plausible-biological-marker
#1
Anilkumar Pillai, Nina R Schooler, Diya Peter, Stephen W Looney, Donald C Goff, Alexander Kopelowicz, John Lauriello, Theo Manschreck, Alan Mendelowitz, Del D Miller, Joanne B Severe, Daniel R Wilson, Donna Ames, Juan Bustillo, John M Kane, Peter F Buckley
Understanding the biological processes that underlie why patients relapse is an issue of fundamental importance to the detection and prevention of relapse in schizophrenia. Brain Derived Neurotrophic Factor (BDNF), a facilitator of brain plasticity, is reduced in patients with schizophrenia. In the present study, we examined whether decreases in plasma BDNF levels could be used as a biological predictor of relapse in schizophrenia. A total of 221 patients were prospectively evaluated for relapse over 30months in the Preventing Relapse in Schizophrenia: Oral Antipsychotics Compared to Injectables: eValuating Efficacy (PROACTIVE) study...
July 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28733244/response-surface-optimization-ex-vivo-and-in-vivo-investigation-of-nasal-spanlastics-for-bioavailability-enhancement-and-brain-targeting-of-risperidone
#2
Fatma Elzahraa Abdelrahman, Ibrahim Elsayed, Mary Kamal Gad, Ahmed Hassen Elshafeey, Magdi Ibrahim Mohamed
Transnasal brain drug targeting could ensure better drug delivery to the brain through the olfactory pathway. Risperidone bioavailability is 66% in extensive metabolizers and 82% in slow metabolizers. The aim of this study is to investigate the ability of the nanovesicular spanlastics to effectively deliver risperidone through the nasal route to the brain and increase its bioavailability. Spanlastics formulae, composed of span and polyvinyl alcohol, were designed based on central composite statistical design...
July 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28727644/cariprazine-specificity-profile-in-the-treatment-of-acute-schizophrenia-a-meta-analysis-and-meta-regression-of-randomized-controlled-trials
#3
Filippo Corponi, Alessandro Serretti, Stuart Montgomery, Chiara Fabbri
Cariprazine is a new dopamine D2 and D3 receptor partial agonist antipsychotic. Meta-analytic evidence of efficacy in acute schizophrenia and specific groups of patients is lacking. We carried out a meta-analysis in patients with acute schizophrenia to evaluate the efficacy of cariprazine over placebo and active comparators in overall symptoms, positive and negative symptoms and quality of life. Low and high (≥6 mg/day) doses were tested separately. The possible effect of clinical-demographic modulators was also tested...
July 19, 2017: International Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28726075/effectiveness-adverse-effects-and-drug-compliance-of-long-acting-injectable-risperidone-in-children-and-adolescents
#4
Mehmet Fatih Ceylan, Betül Erdogan, Selma Tural Hesapcioglu, Esra Cop
BACKGROUND AND OBJECTIVES: Although the use of oral risperidone in children and adolescents has been well studied, there is little information on the intramuscular use of long-acting injectable risperidone (LAIR). The aims of this study were to investigate the effectiveness and adverse effects of LAIR in children and adolescents with conduct disorder, bipolar disorder, and schizophrenia. METHODS: In total, 42 patients (age range 12-17 years) who were non-adherent to oral antipsychotic drugs, received 25 mg/day of LAIR intramuscularly every 2 weeks...
July 19, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28721057/safety-tolerability-and-risks-associated-with-first-and-second-generation-antipsychotics-a-state-of-the-art-clinical-review
#5
REVIEW
Marco Solmi, Andrea Murru, Isabella Pacchiarotti, Juan Undurraga, Nicola Veronese, Michele Fornaro, Brendon Stubbs, Francesco Monaco, Eduard Vieta, Mary V Seeman, Christoph U Correll, André F Carvalho
Since the discovery of chlorpromazine (CPZ) in 1952, first-generation antipsychotics (FGAs) have revolutionized psychiatric care in terms of facilitating discharge from hospital and enabling large numbers of patients with severe mental illness (SMI) to be treated in the community. Second-generation antipsychotics (SGAs) ushered in a progressive shift from the paternalistic management of SMI symptoms to a patient-centered approach, which emphasized targets important to patients - psychosocial functioning, quality of life, and recovery...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28719598/the-predictive-value-of-abcb1-abcg2-cyp3a4-5-and-cyp2d6-polymorphisms-for-risperidone-and-aripiprazole-plasma-concentrations-and-the-occurrence-of-adverse-drug-reactions
#6
C Rafaniello, M Sessa, F F Bernardi, M Pozzi, S Cheli, D Cattaneo, S Baldelli, M Molteni, R Bernardini, F Rossi, E Clementi, C Bravaccio, S Radice, A Capuano
We investigated in ninety Caucasian pediatric patients the impact of the main polymorphisms occurring in CYP3A, CYP2D6, ABCB1 and ABCG2 genes on second-generation antipsychotics plasma concentrations, and their association with the occurrence of adverse drug reactions. Patients with the CA/AA ABCG2 genotype had a statistically significant lower risperidone plasma concentration/dose ratio (Ct/ds) (P-value: 0.007) and an higher estimated marginal probability of developing metabolism and nutrition disorders as compared to the ABCG2 c...
July 18, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/28719227/simvastatin-as-an-adjunctive-therapy-to-risperidone-in-treatment-of-autism-a-randomized-double-blind-placebo-controlled-clinical-trial
#7
Ehsan Moazen-Zadeh, Fatemeh Shirzad, Mohammad-Ali Karkhaneh-Yousefi, Rasoul Khezri, Mohammad-Reza Mohammadi, Shahin Akhondzadeh
OBJECTIVES: Providing novel treatments for autism has been a subject of long-standing research. Based on etiopathological findings, we aim at assessing potential therapeutic effects of statins, here simvastatin, on autism symptoms for the first time. METHODS: In this randomized, double-blind, placebo-controlled, parallel-group 10-week clinical trial, 70 drug-free children aged 4 to 12 years old with diagnosis of autistic disorder based on the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision, who had an Aberrant Behavior Checklist-Community (ABC-C) scale irritability subscale score of ≥12, were equally randomized to receive either simvastatin (20-40 mg/day) or placebo as an adjunct to risperidone (1-2 mg/day) whereas administration of both drugs was started simultaneously from baseline...
July 18, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28716726/early-life-risperidone-enhances-locomotor-responses-to-amphetamine-during-adulthood
#8
Bobbie Lee Stubbeman, Clifford J Brown, Justin R Yates, Mark E Bardgett
Antipsychotic drug prescriptions for pediatric populations have increased over the past 20 years, particularly the use of atypical antipsychotic drugs such as risperidone. Most antipsychotic drugs target forebrain dopamine systems, and early-life antipsychotic drug exposure could conceivably reset forebrain neurotransmitter function in a permanent manner that persists into adulthood. This study determined whether chronic risperidone administration during development modified locomotor responses to the dopamine/norepinephrine agonist, D-amphetamine, in adult rats...
July 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28712880/the-role-of-oxidative-stress-in-antipsychotics-induced-ovarian-toxicity
#9
Ekramy Elmorsy, Ayat Al-Ghafari, Amal Misbah Aggour, Raheela Khan, Saad Amer
This study tested the hypothesis that oxidative stress could be an underlying mechanism for APs-induced ovarian cytotoxicity and reproductive dysfunction. Rat ovarian theca interstitial cells (TICs) were isolated and treated with four APs [chlorpromazine (CPZ), haloperidol (HAL), risperidone (RIS) and clozapine (CLZ)]. MTT assay was used to test the effects of these antipsychotics on TICs viability and to estimate their 50% inhibitory concentrations (IC50s). The effects of APs (IC50s and 1μM concentrations) on the activities of caspases-3, -8 and -9, reactive oxygen species (ROS) production, total intracellular glutathione and lipid peroxidation (LPO) in TICs were assessed...
July 13, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28709776/effects-of-four-atypical-antipsychotics-on-autonomic-nervous-system-activity-in-schizophrenia
#10
Saki Hattori, Ikuko Kishida, Akira Suda, Masatoshi Miyauchi, Yohko Shiraishi, Mami Fujibayashi, Natsuki Tsujita, Chie Ishii, Norio Ishii, Toshio Moritani, Masataka Taguri, Yoshio Hirayasu
Antipsychotic drugs are associated with autonomic nervous system (ANS) dysfunction in patients with schizophrenia, but the effects of individual atypical antipsychotic drugs are not clear. This study investigated how four atypical antipsychotic drugs-risperidone, olanzapine, aripiprazole, and quetiapine-differ in their effects on ANS activity. A total of 241 Japanese patients with schizophrenia participated in this study. All of the participants received an atypical antipsychotic as monotherapy: 90 participants received risperidone, 68 olanzapine, 52 aripiprazole, and 31 quetiapine...
July 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28707161/a-weight-independent-association-between-atypical-antipsychotic-medications-and-obstructive-sleep-apnea
#11
Habibolah Khazaie, Amir Sharafkhaneh, Sepideh Khazaie, Mohammad Rasoul Ghadami
BACKGROUND: With increasing use of atypical antipsychotic (AAP) agents, the concern has been raised about the association between AAP agents and medical complications. Obstructive sleep apnea (OSA) is a common breathing disorder that adversely affects health and quality of life. Because the major risk factors for OSA are weight gain and obesity by altering the upper airway anatomy, an association between AAP and development of OSA is predictable. However, we hypothesized that AAP may promote OSA not only by weight gain but also because of its potential effects on upper airway muscle function...
July 13, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28706577/risperidone-induced-renal-damage-and-metabolic-side-effects-the-protective-effect-of-resveratrol
#12
Sedat Bilgiç, Deniz Taştemir Korkmaz, Sebile Azirak, Ayşe Nilay Güvenç, Nevin Kocaman, Mehmet Kaya Özer
OBJECTIVE: The aim of the study was to investigate the possible protective qualities of resveratrol (RSV) against the side effects of risperidone (RIS) in an experimental model in rat kidneys with histologic and biochemical assessments. MATERIALS AND METHODS: Experimental procedures were performed on 35 female Sprague Dawley rats. Rats were randomly divided into five groups: control, untreated rats (n = 7) were in group 1; group 2 was given 2 mg/kg/day RIS (n = 7); group 3 was treated with 2 mg/kg/day RIS and 20 mg/kg/day RSV (n = 7); group 4 was treated with 2 mg/kg/day RIS and 40 mg/kg/day RSV (n = 7); and group 5 was treated with 2 mg/kg/day RIS and 80 mg/kg/day RSV (n = 7)...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28705297/the-diagnosis-and-treatment-of-behavioral-disorders-in-dementia
#13
Torsten Kratz
BACKGROUND: Behavioral disorders such as aggressiveness, agitation, delusions, disinhibition, affect lability, and apathy arise in more than 90% of patients with dementia. Behavioral disorders are a major challenge and the greatest stress factor in everyday life for nursing personnel and for family members caring for the patient. METHODS: This review is based on relevant publications retrieved by a selective literature search in the PubMed, Cochrane Library, and German S3 guideline databases with the search terms "behavioral disorders," "non-cognitive disorders," and "challenging behavior," in conjunction with "dementia" and "behavioral and psychological symptoms of dementia...
June 30, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28700523/dried-blood-spots-combined-with-ultra-high-performance-liquid-chromatography-mass-spectrometry-for-the-quantification-of-the-antipsychotics-risperidone-aripiprazole-pipamperone-and-their-major-metabolites
#14
Camille Tron, Sanne M Kloosterboer, Bart C H van der Nagel, Rixt A Wijma, Bram Dierckx, Gwen C Dieleman, Teun van Gelder, Birgit C P Koch
BACKGROUND: Risperidone, aripiprazole, and pipamperone are antipsychotic drugs frequently prescribed for the treatment of comorbid behavioral problems in children with autism spectrum disorders. Therapeutic drug monitoring (TDM) could be useful to decrease side effects and to improve patient outcome. Dried blood spot (DBS) sample collection seems to be an attractive technique to develop TDM of these drugs in a pediatric population. The aim of this work was to develop and validate a DBS assay suitable for TDM and home sampling...
August 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28699847/a-systematic-review-and-combined-analysis-of-therapeutic-drug-monitoring-studies-for-long-acting-risperidone
#15
Georgios Schoretsanitis, Edoardo Spina, Christoph Hiemke, Jose de Leon
This systematic review of therapeutic drug monitoring (TDM) identifies three long-acting injectable (LAI) risperidone formulations. Areas covered: Limited data is available on two formulations (RBP-7000 and in Situ Microparticle), but 20 TDM articles on the microsphere formulation were found. Risperidone TDM includes the serum concentrations of risperidone and its active metabolite, 9-hydroxyrisperidone, used for calculating: 1) the risperidone/9-hydroxyrisperidone (R/9-OH-R) ratio (a measure of CYP2D6; values >1 are indicative of a CYP2D6 poor metabolizer) and 2) the total risperidone concentration-to-dose (C/D) ratio (a measure of risperidone clearance with a normal value around 7 in oral risperidone)...
July 12, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28696411/combined-study-of-genetic-and-epigenetic-biomarker-risperidone-treatment-efficacy-in-chinese-han-schizophrenia-patients
#16
Y Shi, M Li, C Song, Q Xu, R Huo, L Shen, Q Xing, D Cui, W Li, J Zhao, L He, S Qin
Nowadays, risperidone is an atypical antipsychotic drug that has been increasingly used for treatment and maintenance therapy in schizophrenia. However, partially affected by genetic or environmental factors, there is significant difference in treatment outcomes among patients. In this study, we aimed to interpret the difference between good and poor responders treated with risperidone in both genetic and epigenetic levels in 288 mainland Chinese patients. We recruited a Henan cohort including 98 patients as initial discovery group and then confirmed our results in Shanghai cohort...
July 11, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28693754/a-comprehensive-analysis-of-mitochondrial-genes-variants-and-their-association-with-antipsychotic-induced-weight-gain
#17
Kirti Mittal, Vanessa F Gonçalves, Ricardo Harripaul, Ari B Cuperfain, Brandi Rollins, Arun K Tiwari, Clement C Zai, Malgorzata Maciukiewicz, Daniel J Müller, Marquis P Vawter, James L Kennedy
Antipsychotic Induced Weight Gain (AIWG) is a common and severe side effect of many antipsychotic medications. Mitochondria play a vital role for whole-body energy homeostasis and there is increasing evidence that antipsychotics modulate mitochondrial function. This study aimed to examine the role of variants in nuclear-encoded mitochondrial genes and the mitochondrial DNA (mtDNA) in conferring risk for AIWG. We selected 168 European-Caucasian individuals from the CATIE sample based upon meeting criteria of multiple weight measures while taking selected antipsychotics (risperidone, quetiapine or olanzapine)...
July 7, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28692863/identification-of-genetic-correlates-of-response-to-risperidone-findings-of-a-multicentric-schizophrenia-study-from-india
#18
Gurjit Kaur, Deepti Gupta, Bir Singh Chavan, Vikas Sinhmar, Rajendra Prasad, Adarsh Tripathi, P D Garg, Rajiv Gupta, Hitesh Khurana, Shiv Gautam, Mushtaq Ahmed Margoob, Jitender Aneja
Risperidone is most commonly used as an antipsychotic in India for treatment of schizophrenia. However, the response to treatment with risperidone is affected by many factors, genetic factors being one of them. So, we attempted to evaluate the association between dopamine D2 (DRD2) receptor, serotonergic (5HT2A) receptor and CYP2D6 gene polymorphisms and response to treatment with risperidone in persons with schizophrenia from North India. It was a multicentric 12-weeks prospective study, undertaken in patients diagnosed with schizophrenia according to International Classification of Diseases 10th revision, Diagnostic Criteria for Research module (ICD-10 DCR)...
July 6, 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/28690671/association-between-the-blood-concentrations-of-ammonia-and-carnitine-amino-acid-of-schizophrenic-patients-treated-with-valproic-acid
#19
Masazumi Ando, Hideaki Amayasu, Takahiro Itai, Hisahiro Yoshida
BACKGROUND: Administration of valproic acid (VPA) is complicated with approximately 0.9% of patients developing hyperammonemia, but the pathogenesis of this adverse effect remains to be clarified. The aim of the present study was to search for mechanisms associated with VPA-induced hyperammonemia in the light of changes in serum amino acids concentrations associated with the urea cycle of schizophrenic patients. METHOD: Blood samples (10 mL) were obtained from 37 schizophrenic patients receiving VPA for the prevention of violent behaviors in the morning after overnight fast...
2017: BioPsychoSocial Medicine
https://www.readbyqxmd.com/read/28689816/a-novel-role-for-dopamine-signaling-in-the-pathogenesis-of-bone-loss-from-the-atypical-antipsychotic-drug-risperidone-in-female-mice
#20
Katherine J Motyl, Megan Beauchemin, Deborah Barlow, Phuong T Le, Kenichi Nagano, Annika Treyball, Anisha Contractor, Roland Baron, Clifford J Rosen, Karen L Houseknecht
Atypical antipsychotic (AA) drugs, including risperidone (RIS), are used to treat schizophrenia, bipolar disorder, and autism, and are prescribed off-label for other mental health issues. AA drugs are associated with severe metabolic side effects of obesity and type 2 diabetes. Cross-sectional and longitudinal data also show that risperidone causes bone loss and increases fracture risk in both men and women. There are several potential mechanisms of bone loss from RIS. One is hypogonadism due to hyperprolactinemia from dopamine receptor antagonism...
July 6, 2017: Bone
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