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1.
Pain Physician ; 27(4): 263-272, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38805533

RESUMEN

BACKGROUND: Flupentixol and melitracen are being investigated for their potential effectiveness in managing persistent idiopathic facial pain (PIFP), based on their mechanisms of action as dopamine receptor antagonists and noradrenaline/serotonin reuptake inhibitors, respectively. The efficacy and safety of flupentixol and melitracen (FM) tablets in treating PIFP were retrospectively analyzed at our hospital. OBJECTIVES: The aim of this study is to determine the effectiveness and safety of FM tablets in treating PIFP. STUDY DESIGN: Retrospective unicentric cohort design. SETTING: An academic university hospital. METHODS: A retrospective analysis was conducted on a cohort comprising 128 patients with a definite diagnoses of PIFP who were treated with FM tablets (flupentixol 0.5 mg and melitracen 10 mg tablet, >= 4 tablets/d) from January 2022 through May 2023 at an academic university hospital. Baseline conditions were statistically described, and Numeric Rating Scale (NRS-11) scores of pain levels before and during treatment were collected. Pain relief rates were calculated. Differences in baseline characteristics between responsive and unresponsive patients were evaluated using statistical tests. Additionally, the side effects experienced during treatment were summarized. RESULTS: Among the included 128 patients, 105 (82.0%) patients achieved pain relief (pain NRS-11 score reduction rate >= 50%). The median treatment onset time was 3 (1-7) days. NRS-11 scores of responsive patients at week 2, week 4, week 8, and week 12 were significantly lower than the baseline NRS-11 scores (P < 0.001), regardless of their Hamilton Depression Rating Scale score. Pain duration was the only factor that related to responsiveness (Wilcoxon rank sum test, P < 0.001; logistic regression, P = 0.001). No serious side effects that could affect patients' lives were observed during the first week of treatments. LIMITATIONS: Due to its retrospective nature, this study is limited by its lack of a randomized control. The lack of data on nonresponders who did not achieve significant pain relief hinders assessing overall change and the placebo effects'. Patients previously treated with antidepressants were excluded, making it hard to determine if FM tablets were a better treatment for PIFP. Additionally, the small sample size in a single center may be influenced by chance variation in pain relief. CONCLUSIONS: FM tablets showed its potential in the management of PIFP with considerable efficacy and safety. Early administration of FM tablets after a PIFP diagnosis may result in a high possibility of pain relief.


Asunto(s)
Dolor Facial , Flupentixol , Humanos , Estudios Retrospectivos , Masculino , Femenino , Persona de Mediana Edad , Dolor Facial/tratamiento farmacológico , Adulto , Flupentixol/uso terapéutico , Flupentixol/efectos adversos , Flupentixol/administración & dosificación , Comprimidos , Anciano , Resultado del Tratamiento
2.
Am J Psychiatry ; 178(5): 424-436, 2021 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-33596679

RESUMEN

OBJECTIVE: This study compared relapse prevention and acceptability of long-acting injectable (LAI) antipsychotics in the maintenance treatment of adults with nonaffective psychoses. METHODS: The authors searched MEDLINE, Embase, PsycINFO, CINAHL, CENTRAL, and online registers for randomized controlled trials published until June 2020. Relative risks and standardized mean differences were pooled using random-effects pairwise and network meta-analysis. The primary outcomes were relapse rate and all-cause discontinuation ("acceptability"). The quality of included studies was rated with the Cochrane Risk of Bias tool, and the certainty of pooled estimates was measured with GRADE (Grading of Recommendations Assessment, Development, and Evaluation). RESULTS: Of 86 eligible trials, 78 (N=11,505) were included in the meta-analysis. Regarding relapse prevention, most of the 12 LAIs included outperformed placebo. The largest point estimates and best rankings of LAIs compared with placebo were found for paliperidone (3-month formulation) and aripiprazole. Moderate to high GRADE certainty for superior relapse prevention compared with placebo was also found for (in descending ranking order) risperidone, pipothiazine, olanzapine, and paliperidone (1-month formulation). In head-to-head comparisons of LAIs, only haloperidol was inferior to aripiprazole, fluphenazine, and paliperidone. For acceptability, most LAIs outperformed placebo, with moderate to high GRADE certainty for (in descending ranking order) zuclopenthixol, aripiprazole, paliperidone (3-month formulation), olanzapine, flupenthixol, fluphenazine, and paliperidone (1-month formulation). In head-to-head comparisons, only LAI aripiprazole had superior acceptability to other LAIs (bromperidol, fluphenazine, paliperidone [1-month formulation], pipothiazine, and risperidone). CONCLUSIONS: LAI formulations of paliperidone (3-month formulation), aripiprazole, olanzapine, and paliperidone (1-month formulation) showed the highest effect sizes and certainty of evidence for both relapse prevention and acceptability. Results from this network meta-analysis should inform frontline clinicians and guidelines.


Asunto(s)
Antipsicóticos/administración & dosificación , Aceptación de la Atención de Salud , Trastornos Psicóticos/tratamiento farmacológico , Esquizofrenia/tratamiento farmacológico , Aripiprazol/administración & dosificación , Clopentixol/administración & dosificación , Preparaciones de Acción Retardada , Flupentixol/administración & dosificación , Flufenazina/administración & dosificación , Haloperidol/administración & dosificación , Humanos , Inyecciones Intramusculares , Metaanálisis en Red , Olanzapina/administración & dosificación , Palmitato de Paliperidona/administración & dosificación , Fenotiazinas/administración & dosificación , Risperidona/administración & dosificación , Prevención Secundaria
3.
Behav Brain Res ; 393: 112794, 2020 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-32619566

RESUMEN

This study aimed to further dissect the deer mouse (Peromyscus maniculatus bairdii) model of compulsive-like behavior with respect to two persistent-like behavioral phenotypes viz. large nest building (LNB) and high marble-burying (HMB), which may be relevant to understanding the neurobiology of different symptom dimensions in obsessive-compulsive and related disorders. Since LNB is sensitive to chronic, high dose escitalopram intervention but HMB is not, we assessed whether the two behaviors could be further distinguished based on their response to 4 weeks of uninterrupted serotoninergic intervention (i.e. escitalopram; ESC; 50 mg/kg/day), dopaminergic antagonism, i.e. flupentixol; FLU; 0.9 mg/kg/day), dopaminergic potentiation (i.e. rasagiline; RAS; 5 mg/kg/day), and their respective combinations with escitalopram (ESC/FLU and ESC/RAS). Here we show LNB to be equally responsive to chronic ESC and ESC/FLU. HMB was insensitive to either of these interventions but was responsive to ESC/RAS. Additionally, we report that scoring preoccupied interaction with marbles over several trials is an appropriate measure of compulsive-like behavioral persistence in addition to the standard marble burying test. Taken together, these data provide further evidence that LNB and HMB in deer mice have distinctive neurobiological underpinnings. Thus, the naturally occurring compulsive-like behaviors expressed by deer mice may be useful in providing a platform to test unique treatment targets for different symptom dimensions of OCD and related disorders.


Asunto(s)
Conducta Compulsiva/fisiopatología , Dopamina/fisiología , Comportamiento de Nidificación/fisiología , Serotonina/fisiología , Animales , Citalopram/administración & dosificación , Antagonistas de Dopamina/administración & dosificación , Femenino , Flupentixol/administración & dosificación , Indanos/administración & dosificación , Masculino , Inhibidores de la Monoaminooxidasa/administración & dosificación , Comportamiento de Nidificación/efectos de los fármacos , Peromyscus , Fenotipo , Inhibidores Selectivos de la Recaptación de Serotonina/administración & dosificación
4.
Drug Des Devel Ther ; 13: 3331-3342, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31571834

RESUMEN

PURPOSE: A fixed-dose combination (FDC) tablet of melitracen/flupentixol has been widely used for depression. The purpose of this study was to assess the safety profile and the relative bioavailability of two FDC products containing 10 mg melitracen and 0.5 mg flupentixol from two different manufacturers, in order to acquire adequate pharmacokinetic evidence for registration approval of the test formulation. METHODS: The study was designed as a single-dose, randomized, open-label, 2-period crossover study under fasted or fed conditions in healthy Chinese subjects. Twenty-four subjects (16 men and 8 women) were selected for fasted study, and another 24 cases (16 men and 8 women) were in fed study. Each subject was randomized at the beginning to receive either a single dose of the reference FDC or the test FDC tablet during the first period. Following two-week washout period, all subjects received the alternate formulation during the second period. Blood samples were collected up to 144 hrs after administration. Pharmacokinetic parameters, including Cmax, Tmax, AUC0-t, AUC0-∞, t½, CL/F, and Vd/F were acquired based on the time versus concentration profiles. Then, the geometric mean ratios (GMR) and corresponding 90% CIs were calculated for the determination of bioequivalence analysis. Safety assessment included changes in vital signs and laboratory tests, physical examination findings, and incidence or reports of adverse events (AEs). RESULTS: The present study has clearly indicated the test and the reference FDC products are bioequivalent in terms of rate and extent of drug absorption. GMR of Cmax, AUC0-t, and AUC0-∞ for both flupentixol and melitracen between the two formulation FDC products, and corresponding 90% CIs, were all within the range of 80% to 125% under fasted or fed conditions. Both the test and the reference FDC products indicated good tolerance in all volunteers. Chinese Clinical Trials Registry identifier: CTR20171256.


Asunto(s)
Antracenos/farmacocinética , Antidepresivos/farmacocinética , Flupentixol/farmacocinética , Adulto , Antracenos/administración & dosificación , Antracenos/efectos adversos , Antidepresivos/administración & dosificación , Antidepresivos/efectos adversos , Área Bajo la Curva , China , Estudios Cruzados , Combinación de Medicamentos , Ayuno , Femenino , Flupentixol/administración & dosificación , Flupentixol/efectos adversos , Voluntarios Sanos , Humanos , Masculino , Comprimidos , Equivalencia Terapéutica , Adulto Joven
5.
Psychopharmacology (Berl) ; 236(11): 3081-3092, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31300829

RESUMEN

RATIONALE: The licensed dose range for the long-acting injectable antipsychotic flupentixol decanoate (Depixol®) in the treatment of schizophrenia is very broad. This provides little useful direction to prescribers and may ultimately result in patients receiving unnecessarily high doses. OBJECTIVES: We aimed to estimate the effect of dose of flupentixol decanoate on relapse rates in schizophrenia and on tolerability by expanding on an earlier review and including non-RCT and German-language studies, as well as using pharmacokinetic and pharmacodynamic data to offer guidance on dosing. METHODS: A literature review using EMBASE, Medline, PsycINFO and PubMed was conducted. Treatment success rates at 6 months were extracted or extrapolated from the studies and plotted against dose to estimate a dose-response curve. RESULTS: Data from 16 studies (n = 514) allowed estimation of a dose-response curve which rises steeply between the chosen placebo anchor (25% success rate) and 10 mg every 2 weeks before reaching a maximum between 20 and 40 mg every 2 weeks (80-95% success rates). Extrapyramidal side effects (EPSEs) were frequently seen (12-71% of participants) in that dose range. Two -weekly injections seem to provide the highest trough plasma concentration per dose administered and the lowest peak-to-trough concentration ratio. Plasma concentration varied up to 5-fold among individuals receiving the same dose. CONCLUSIONS: The optimal dose of flupentixol decanoate is likely to be between 20 mg and 40 mg every 2 weeks although higher doses may be required in some individuals owing to variation in drug handling. Doses of flupentixol should be individually established in the range of 10 to 40 mg every 2 weeks according to response and tolerability.


Asunto(s)
Antagonistas de Dopamina/administración & dosificación , Flupentixol/análogos & derivados , Esquizofrenia/tratamiento farmacológico , Psicología del Esquizofrénico , Adulto , Antipsicóticos/administración & dosificación , Preparaciones de Acción Retardada/administración & dosificación , Relación Dosis-Respuesta a Droga , Femenino , Flupentixol/administración & dosificación , Humanos , Masculino , Persona de Mediana Edad , Esquizofrenia/diagnóstico , Resultado del Tratamiento
7.
Psychol Med ; 47(12): 2187-2196, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28347393

RESUMEN

BACKGROUND: Progressive brain volume reductions have been described in schizophrenia, and an association with antipsychotic exposure has been reported. METHODS: We compared percentage changes in grey and white matter volume from baseline to month 12 in 23 previously antipsychotic-naïve patients with a first episode of schizophrenia or schizophreniform disorder who were treated with the lowest effective dose of flupenthixol decanoate depot formulation, with 53 matched healthy individuals. Total antipsychotic dose was precisely calculated and its relationship with brain volume changes investigated. Relationships between volumetric changes and treatment were further investigated in terms of treatment response (changes in psychopathology and functionality) and treatment-related adverse-events (extrapyramidal symptoms and weight gain). RESULTS: Excessive cortical volume reductions were observed in patients [-4.6 (6.6)%] v. controls [-1.12 (4.0)%] (p = 0.009), with no significant group differences for changes in subcortical grey matter and white matter volumes. In a multiple regression model, the only significant predictor of cortical volume change was total antipsychotic dose received (p = 0.04). Cortical volume change was not significantly associated with the changes in psychopathology, functionality, extrapyramidal symptoms and body mass index or age, gender and duration of untreated psychosis. CONCLUSIONS: Brain volume reductions associated with antipsychotic treatment are not restricted to poor outcome patients and occur even with the lowest effective dose of antipsychotic. The lack of an association with poor treatment response or treatment-related adverse effects counts against cortical volume reductions reflecting neurotoxicity, at least in the short term. On the other hand, the volume reductions were not linked to the therapeutic benefits of antipsychotics.


Asunto(s)
Antipsicóticos/farmacología , Corteza Cerebral , Flupentixol/análogos & derivados , Sustancia Gris , Trastornos Psicóticos , Esquizofrenia , Sustancia Blanca , Adulto , Antipsicóticos/administración & dosificación , Corteza Cerebral/diagnóstico por imagen , Corteza Cerebral/efectos de los fármacos , Corteza Cerebral/patología , Preparaciones de Acción Retardada , Femenino , Flupentixol/administración & dosificación , Flupentixol/farmacología , Sustancia Gris/diagnóstico por imagen , Sustancia Gris/efectos de los fármacos , Sustancia Gris/patología , Humanos , Imagen por Resonancia Magnética , Masculino , Trastornos Psicóticos/diagnóstico por imagen , Trastornos Psicóticos/tratamiento farmacológico , Trastornos Psicóticos/patología , Esquizofrenia/diagnóstico por imagen , Esquizofrenia/tratamiento farmacológico , Esquizofrenia/patología , Resultado del Tratamiento , Sustancia Blanca/diagnóstico por imagen , Sustancia Blanca/efectos de los fármacos , Sustancia Blanca/patología , Adulto Joven
8.
Schizophr Res ; 188: 144-150, 2017 10.
Artículo en Inglés | MEDLINE | ID: mdl-28130002

RESUMEN

BACKGROUND: Neurological soft signs (NSS) are proposed to represent both state- and trait-related features of schizophrenia. METHOD: We assessed the course of NSS with the Neurological Evaluation Scale (NES) over 12months of standardised treatment in 126 patients with first-episode schizophrenia, schizophreniform or schizoaffective disorder, and evaluated their state- and trait-related associations with psychopathology, functionality, cognition and antipsychotic treatment. We considered change scores from baseline to be state-related and endpoint scores to be trait-related. RESULTS: Significant effects for time were recorded for all NSS domains. For state-related change-scores greater improvements in sensory integration were predicted by more improvement in working memory (p=0.01); greater improvements in motor sequencing scores were predicted by more improvement in working memory (p=0.005) and functionality (p=0.005); and greater improvements in NES Total score were predicted by more improvement in disorganised symptoms (p=0.02). There were more substantial associations between trait-related endpoint scores than for state-related change scores. For endpoint scores lower composite cognitive score predicted poorer sensory integration (p=0.001); higher Parkinsonism score predicted poorer motor co-ordination (p=0.0001); lower composite cognitive score (p=0.001) and higher Parkinsonism score (p=0.005) predicted poorer motor sequencing; higher Parkinsonism score (p=0.0001) and disorganised symptoms (p=0.04), and lower composite cognitive score (p=0.0007) predicted higher NES total score. CONCLUSIONS: NSS improved with treatment, but were weakly associated with improvements in psychopathology. Studies investigating NSS as trait-markers should ensure that patients have been optimally treated at the time of testing, and should take possible effects of extrapyramidal symptoms into account.


Asunto(s)
Antipsicóticos/administración & dosificación , Cognición/efectos de los fármacos , Trastornos Psicóticos/tratamiento farmacológico , Trastornos Psicóticos/fisiopatología , Esquizofrenia/tratamiento farmacológico , Esquizofrenia/fisiopatología , Femenino , Flupentixol/administración & dosificación , Flupentixol/análogos & derivados , Humanos , Entrevista Psicológica , Modelos Lineales , Estudios Longitudinales , Masculino , Memoria a Corto Plazo/efectos de los fármacos , Actividad Motora/efectos de los fármacos , Examen Neurológico , Escalas de Valoración Psiquiátrica , Trastornos Psicóticos/psicología , Psicología del Esquizofrénico , Índice de Severidad de la Enfermedad , Resultado del Tratamiento , Adulto Joven
9.
Artículo en Chino | MEDLINE | ID: mdl-29774682

RESUMEN

Objective:To explore the clinical effects of Flupentixol/Melitracencombined with specific immunotherapy in allergic rhinitis patients with anxiety and depression. Method:Totally ninetynine moderate to severe persistent allergic rhinitis patients with anxiety and depression from October 2014 to Sepetember 2015 were randomly divided into two groups: 45 patients in experimental group (Flupentixol/Melitracen 10.5 mg,QD,treatment last 4 months)and 44 patients in control group.All patients were treated with specific immunotherapy for 1 years. The nasal symptoms score, mini Rhinoconjunctivitis Quality of life questionnaire(MiniRQLQ), Medication score, SAS and SDS score and the clinical curative effect were observed before treatment, after 4 months or one year treatment. The drug reactions were also recorded. Result:The VAS scores, MiniRQLQ scores, medication scores, SAS and SDS scores of patients in two groups who were treated after 4 months and 1 year were significantly reduced than that of patients before treatment.The differences were statistically significant(P<0.05).Compared with the control group, nasal symptom scores, MiniRQLQ scores, medication scores, SAS and SDS scores in experimental group were decreased after 4 month or 1 year treatment(P<0.05).After 4 months of treatment, the total effective rate of the experimental group was 84.4%, while the control group was 56.8%.After 1 years of treatment, the experimental group excellence rate was 57.8%, while the control group was 22.7%.The differences were statistically significant(P<0.05). During the course of treatment, there were thirteen cases of mild adverse reactionsin experimental group (17.7%) and control group(11.4%). There was no significant differences(P>0.05). Conclusion:Flupentixol and melitracen combined with specific immunotherapy could sifnificantlly relieve clinical symptom, quality of life and mental depression.is a safe and reliable therapeutic regimen for further improving clinical symptoms,quality of life,mental statusand the clinical efficacy in moderate to severe persistent with anxiety anddepression.


Asunto(s)
Antracenos/administración & dosificación , Ansiedad/tratamiento farmacológico , Depresión/tratamiento farmacológico , Flupentixol/administración & dosificación , Inmunoterapia/métodos , Rinitis Alérgica/terapia , Ansiedad/complicaciones , Depresión/complicaciones , Combinación de Medicamentos , Quimioterapia Combinada , Humanos , Calidad de Vida , Rinitis Alérgica/psicología , Resultado del Tratamiento
11.
Neuropsychopharmacology ; 41(9): 2352-65, 2016 08.
Artículo en Inglés | MEDLINE | ID: mdl-26997298

RESUMEN

The abuse of 'bath salts' has raised concerns because of their adverse effects, which include delirium, violent behavior, and suicide ideation in severe cases. The bath salt constituent 3,4-methylenedioxypyrovalerone (MDPV) has been closely linked to these and other adverse effects. The abnormal behavioral pattern produced by acute high-dose MDPV intake suggests possible disruptions of neural communication between brain regions. Therefore, we determined if MDPV exerts disruptive effects on brain functional connectivity, particularly in areas of the prefrontal cortex. Male rats were imaged following administration of a single dose of MDPV (0.3, 1.0, or 3.0 mg/kg) or saline. Resting state brain blood oxygenation level-dependent (BOLD) images were acquired at 4.7 T. To determine the role of dopamine transmission in MDPV-induced changes in functional connectivity, a group of rats received the dopamine D1/D2 receptor antagonist cis-flupenthixol (0.5 mg/kg) 30 min before MDPV. MDPV dose-dependently reduced functional connectivity. Detailed analysis of its effects revealed that connectivity between frontal cortical and striatal areas was reduced. This included connectivity between the prelimbic prefrontal cortex and other areas of the frontal cortex and the insular cortex with hypothalamic, ventral, and dorsal striatal areas. Although the reduced connectivity appeared widespread, connectivity between these regions and somatosensory cortex was not as severely affected. Dopamine receptor blockade did not prevent the MDPV-induced decrease in functional connectivity. The results provide a novel signature of MDPV's in vivo mechanism of action. Reduced brain functional connectivity has been reported in patients suffering from psychosis and has been linked to cognitive dysfunction, audiovisual hallucinations, and negative affective states akin to those reported for MDPV-induced intoxication. The present results suggest that disruption of functional connectivity networks involving frontal cortical and striatal regions could contribute to the adverse effects of MDPV.


Asunto(s)
Benzodioxoles/administración & dosificación , Encéfalo/efectos de los fármacos , Encéfalo/fisiología , Psicotrópicos/administración & dosificación , Pirrolidinas/administración & dosificación , Animales , Mapeo Encefálico , Drogas de Diseño/administración & dosificación , Antagonistas de Dopamina/administración & dosificación , Flupentixol/administración & dosificación , Imagen por Resonancia Magnética , Masculino , Actividad Motora/efectos de los fármacos , Vías Nerviosas/efectos de los fármacos , Vías Nerviosas/fisiología , Ratas Long-Evans , Cathinona Sintética
12.
Schizophr Res ; 169(1-3): 89-94, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26441006

RESUMEN

BACKGROUND: Studies of pre-and post-treatment striatal volume in schizophrenia have reported conflicting results. MATERIALS AND METHODS: We assessed dorsal striatal (caudate and putamen) volumes bilaterally in 22 never-treated, non-substance-abusing patients with first-episode schizophrenia or schizophreniform disorder and 23 healthy controls matched for age, sex and educational status. Patients received either risperidone or flupenthixol long acting injection and were compared by structural MRI with controls at weeks 0, 4 and 13. T1-weighted data on a 3T MRI scanner were obtained and images were reconstructed using FreeSurfer. Treatment outcome was assessed by changes in psychopathology, insight, functionality, cognitive performance and motor symptoms. RESULTS: Caudate, but not putamen volumes was significantly larger in patients bilaterally at baseline (P=0.01). Linear mixed effects repeated measures found no significant group × time interactions for any of the regions. Caudate volume was not significantly associated with improvements in psychotic symptoms. Also, the findings of a regression model were inconsistent insofar as larger caudate volume was associated with less improvement in depression scores, greater improvement in functionality and greater improvement in verbal learning but less improvement in reasoning and problem solving (left caudate) and composite cognitive score (right caudate). CONCLUSIONS: The increased caudate volumes prior to treatment are contrary to previous reports in never-treated patients with first-episode schizophrenia, and together with our failure to demonstrate volume changes related to acute treatment, call into question previous proposals that enlarged caudate volume is a consequence of antipsychotic treatment.


Asunto(s)
Núcleo Caudado/patología , Trastornos Psicóticos/tratamiento farmacológico , Trastornos Psicóticos/patología , Putamen/patología , Esquizofrenia/tratamiento farmacológico , Esquizofrenia/patología , Adulto , Antipsicóticos/administración & dosificación , Núcleo Caudado/efectos de los fármacos , Método Doble Ciego , Femenino , Flupentixol/administración & dosificación , Humanos , Procesamiento de Imagen Asistido por Computador , Imagen por Resonancia Magnética , Masculino , Tamaño de los Órganos , Escalas de Valoración Psiquiátrica , Trastornos Psicóticos/psicología , Putamen/efectos de los fármacos , Risperidona/administración & dosificación , Psicología del Esquizofrénico , Programas Informáticos , Resultado del Tratamiento , Adulto Joven
13.
Neuropeptides ; 53: 19-27, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26329764

RESUMEN

It has been shown that dopamine antagonists suppress the ghrelin-induced increased motivation to work for food. The aim of this study was to investigate the influence of the dopamine antagonist flupentixol on ghrelin-induced food intake. Ad libitum fed male Sprague-Dawley (SD) rats were injected intraperitoneally (ip) with vehicle plus vehicle, vehicle plus ghrelin (13 µg/kg), 0.25mg/kg or 0.5mg/kg flupentixol plus ghrelin, or 0.25mg/kg or 0.5 mg/kg flupentixol plus vehicle. In a second experiment, intracerebroventricularly (icv) cannulated rats received an ip injection of vehicle (0.15M NaCl) or flupentixol (0.25mg/kg) and 20 min later an icv injection of vehicle or ghrelin (1 µg/rat). Both experiments were performed twice: first, rats were offered only standard chow, while in the second experiment they could choose between standard chow and a palatable/preferred chow. Cumulative light phase food intake was assessed for 7h. Ip as well as icv injected ghrelin reliably increased intake of standard chow. Flupentixol did not affect ghrelin-induced intake of standard chow. Ip injected ghrelin failed to increase the intake of palatable chow, whereas icv injected ghrelin did. This effect was not blocked by ip flupentixol. In summary, ip administered ghrelin did not increase the intake of chow the rats preferred; whereas icv injected ghrelin further stimulated the intake of preferred chow suggesting a direct central mediation of this effect. Our results show that the dopamine antagonist flupentixol does not influence ghrelin-induced feeding in our choice paradigm.


Asunto(s)
Antagonistas de Dopamina/farmacología , Ingestión de Alimentos/efectos de los fármacos , Flupentixol/farmacología , Ghrelina/antagonistas & inhibidores , Animales , Antagonistas de Dopamina/administración & dosificación , Relación Dosis-Respuesta a Droga , Flupentixol/administración & dosificación , Preferencias Alimentarias , Inyecciones Intraperitoneales , Inyecciones Intraventriculares , Masculino , Periodicidad , Ratas , Ratas Sprague-Dawley
14.
Psychiatry Res ; 233(2): 186-93, 2015 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-26184461

RESUMEN

We investigated whether morphological brain changes occurred in brain regions associated with body-weight homeostasis during acute antipsychotic treatment, and if so, whether they were related to changes in body mass and metabolic profile. Twenty-two antipsychotic-naive patients with first-episode schizophrenia received either risperidone long acting injection or flupenthixol decanoate over 13 weeks and were compared by structural MRI with 23 matched healthy volunteers at weeks 0, 4 and 13. Images were reconstructed using freesurfer fully-automated whole brain segmentation. The ventral diencephalon and prefrontal cortex were selected to represent the homeostatic and hedonic food intake regulatory systems respectively. Body mass was measured at weeks 0, 7 and 13 and fasting glucose and lipid profiles at weeks 0 and 13. Linear mixed effect models indicated significant group(⁎)time interactions for the ventral diencephalon volumes bilaterally. Ventral diencephalon volume reduction was strongly correlated bilaterally with body mass increase and HDL-cholesterol reductions, and unilaterally with blood glucose elevation. There were no significant changes in prefrontal cortical thickness. These findings implicate the ventral diencephalon, of which the hypothalamus is the main component, in the acute adipogenic and dyslipidaemic effects of antipsychotic medication.


Asunto(s)
Antipsicóticos/efectos adversos , Antipsicóticos/uso terapéutico , Índice de Masa Corporal , Encéfalo/efectos de los fármacos , Encéfalo/fisiopatología , Ingestión de Alimentos/efectos de los fármacos , Ingestión de Alimentos/fisiología , Flupentixol/análogos & derivados , Interpretación de Imagen Asistida por Computador/métodos , Imagen por Resonancia Magnética/métodos , Risperidona/efectos adversos , Esquizofrenia/tratamiento farmacológico , Esquizofrenia/fisiopatología , Adolescente , Adulto , Preparaciones de Acción Retardada , Método Doble Ciego , Femenino , Flupentixol/administración & dosificación , Flupentixol/efectos adversos , Humanos , Inyecciones Intramusculares , Masculino , Persona de Mediana Edad , Risperidona/administración & dosificación , Sudáfrica , Adulto Joven
15.
Behav Neurosci ; 129(4): 450-6, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26098230

RESUMEN

Two experiments used an associative blocking design to study the role of dopamine receptors in the nucleus accumbens shell (AcbSh) and core (AcbC) in fear prediction error. Rats in the experimental groups were trained to a visual fear-conditioned stimulus (conditional stimulus [CS]) A in Stage I, whereas rats in the control groups were not. In Stage II, all rats received compound fear conditioning of the visual CSA and an auditory CSB. Rats were later tested for their fear responses to CSB. All rats received microinjections of saline or the D1-D2 receptor antagonist cis-(z)-flupenthixol prior to Stage II. These microinjections targeted either the AcbSh (Experiment 1) or the AcbC (Experiment 2). In each experiment, Stage I fear conditioning of CSA blocked fear learning to CSB. Microinjection of cis-(z)-flupenthixol (10 or 20 µg) into the AcbSh (Experiment 1) had no effect on fear learning or associative blocking. In contrast, microinjection of cis-(z)-flupenthixol (10 or 20 µg) into the AcbC (Experiment 2) attenuated blocking and so enabled fear learning to CSB. These results identify the AcbC as the critical locus for dopamine receptor contributions to fear prediction error and the associative blocking of fear learning.


Asunto(s)
Aprendizaje por Asociación/fisiología , Miedo/fisiología , Núcleo Accumbens/fisiología , Receptores de Dopamina D1/fisiología , Receptores de Dopamina D2/fisiología , Animales , Aprendizaje por Asociación/efectos de los fármacos , Condicionamiento Psicológico/efectos de los fármacos , Condicionamiento Psicológico/fisiología , Antagonistas de los Receptores de Dopamina D2/administración & dosificación , Electrochoque , Miedo/efectos de los fármacos , Flupentixol/administración & dosificación , Masculino , Núcleo Accumbens/efectos de los fármacos , Ratas , Ratas Sprague-Dawley , Receptores de Dopamina D1/antagonistas & inhibidores
16.
Behav Neurosci ; 129(4): 399-411, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-26052791

RESUMEN

The noncompetitive NMDA receptor antagonist (+)-5-methyl-10,11-dihydro-5H-dibenzo [a,d] cyclohepten-5-10-imine maleate (MK-801) has been shown to increase the probability of operant responding during extinction and reduce infralimbic prefrontal cortical activation, possibly modeling the cognitive dysfunction symptomology, and underlying cause, in patients with schizophrenia. The present study sought to determine if typical and/or atypical antipsychotics would attenuate the MK-801-induced behavioral perseveration and whether this would be associated with concomitant changes in phosphorylated ERK1/2 (pERK1/2) labeling in the infralimbic cortex (IL). Male, Long Evans rats were pretreated with the typical antipsychotic, Flupenthixol (0, 0.125, 0.25 or 0.5 mg/kg) or the atypical antipsychotic, aripiprazole (0, 0.3, 1.0, 3.0 mg/kg), then given 0.1 mg/kg MK-801 followed by a 60-min appetitive operant extinction session. Flupenthixol produced a dose-dependent decrease in MK-801-induced bar pressing behavior and locomotor activity and a dose-dependent increase in IL pERK1/2 labeling. Aripiprazole produced a U-shaped dose-response curve on MK-801-induced bar pressing behavior, a dose-dependent decrease in locomotor activity but no changes in IL pERK1/2 labeling. The attenuation of the MK-801-induced behavioral (bar pressing, locomotion) profile by Flupenthixol indicates a clear dopaminergic contribution to this behavior. The behavioral effect of aripiprazole may be due to its a) binding to presynaptic dopamine receptors at the midrange dose decreasing dopamine output and b) binding to postsynaptic dopamine receptors at the higher dose increasing dopamine tone. While both classes of antipsychotics can normalize perseverative behavioral symptoms, the underlying prefrontal cortical dysregulation seems to persist.


Asunto(s)
Antipsicóticos/administración & dosificación , Aripiprazol/administración & dosificación , Condicionamiento Operante/efectos de los fármacos , Maleato de Dizocilpina/administración & dosificación , Antagonistas de Aminoácidos Excitadores/administración & dosificación , Extinción Psicológica/efectos de los fármacos , Flupentixol/administración & dosificación , Animales , Masculino , Proteína Quinasa 1 Activada por Mitógenos/metabolismo , Proteína Quinasa 3 Activada por Mitógenos/metabolismo , Actividad Motora/efectos de los fármacos , Corteza Prefrontal/efectos de los fármacos , Corteza Prefrontal/metabolismo , Ratas , Ratas Long-Evans
17.
Psychol Med ; 45(13): 2873-83, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25998030

RESUMEN

BACKGROUND: Several questions remain unanswered regarding the magnitude and time course of cognitive improvement in response to antipsychotic treatment. The purpose of this study was to assess changes in cognitive performance in antipsychotic-naive or minimally medicated patients with first-episode schizophrenia during the first 12 months of treatment, in a case-control design. Patients were treated with flupenthixol decanoate depot injection, according to a standard algorithm. The primary outcome measure was change in MATRICS Cognitive Consensus Battery (MCCB) composite score over 12 months. METHOD: The sample comprised 92 patients and 100 healthy controls matched for age, sex, ethnicity and educational status. Cognitive function was assessed by means of the MCCB. RESULTS: A mixed-effects model identified a significant group × time effect (p ≤ 0.0001) for the MCCB composite score, with patients showing a greater degree of change than the controls. For the other MCCB domains there were significant group × time effects at adjusted significance level for attention and vigilance (p ≤ 0.0001), visual learning (p ≤ 0.0001), verbal learning (p = 0.005) and working memory (p ≤ 0.0001), but not for reasoning and problem solving (p = 0.04), speed of processing (p = 0.03) and social cognition (p = 0.06). There were moderate correlations between change in MCCB composite score and change in symptomatology as assessed by Positive and Negative Syndrome Scale factor analysis-derived domains. CONCLUSIONS: Substantial improvements in cognitive function were observed over and above a practice effect, and were significantly correlated with improvements in psychopathology and functionality.


Asunto(s)
Antipsicóticos/administración & dosificación , Cognición/fisiología , Flupentixol/administración & dosificación , Esquizofrenia/complicaciones , Esquizofrenia/tratamiento farmacológico , Psicología del Esquizofrénico , Adolescente , Adulto , Atención , Estudios de Casos y Controles , Análisis Factorial , Femenino , Humanos , Estudios Longitudinales , Masculino , Memoria a Corto Plazo , Solución de Problemas , Escalas de Valoración Psiquiátrica , Aprendizaje Verbal , Adulto Joven
18.
Int J Neuropsychopharmacol ; 18(10): pyv043, 2015 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-25908669

RESUMEN

BACKGROUND: It is well known that brain dopamine (DA) signals support risk-based decision making; however, the specific terminal regions of midbrain DA neurons through which DA signals mediate risk-based decision making are unknown. METHODS: Using microinfusions of the D1/D2 receptor antagonist flupenthixol, we sought to explore the role of D1/D2 receptor activity in the rat orbitofrontal cortex (OFC) and core and shell regions of the nucleus accumbens (AcbC and AcbS, respectively) in the regulation of risky choices. A risk-discounting task was used that involves choices between a certain small-reward lever that always delivered 1 pellet or a risky large-reward lever which delivered 4 pellets but had a decreasing probability of receiving the reward across 4 subsequent within-session trial blocks (100%, 50%, 25%, 12.5%). To validate task sensitivity to experimental manipulations of DA activity, we also examined the effects of systemic amphetamine and flupenthixol. RESULTS: Systemic amphetamine increased while systemic flupenthixol reduced risky choices. Results further demonstrate that rats that received intra-AcbC flupenthixol were able to track increasing risk associated with the risky lever but displayed a generally reduced preference for the risky lever across all trial blocks, including in the initial trial block (large reward at 100%). Microinfusions of flupenthixol into the AcbS or OFC did not alter risk-based decision making. CONCLUSIONS: Our data suggest that intra-AcbC D1/D2 receptor signaling does not support the ability to track shifts in reward probabilities but does bias risk-based decision making. That is, it increased the rats' preference for the response option known to be associated with higher risk-related costs.


Asunto(s)
Conducta de Elección/fisiología , Núcleo Accumbens/metabolismo , Corteza Prefrontal/metabolismo , Receptores de Dopamina D1/metabolismo , Receptores de Dopamina D2/metabolismo , Asunción de Riesgos , Anfetamina/administración & dosificación , Animales , Estimulantes del Sistema Nervioso Central/administración & dosificación , Conducta de Elección/efectos de los fármacos , Antagonistas de Dopamina/administración & dosificación , Flupentixol/administración & dosificación , Masculino , Núcleo Accumbens/efectos de los fármacos , Corteza Prefrontal/efectos de los fármacos , Probabilidad , Desempeño Psicomotor/efectos de los fármacos , Desempeño Psicomotor/fisiología , Ratas , Recompensa , Riesgo
19.
BMC Psychiatry ; 15: 84, 2015 Apr 14.
Artículo en Inglés | MEDLINE | ID: mdl-25879863

RESUMEN

BACKGROUND: Patients in chronic somatic diseases are often accompanied with depression and anxiety, remission of which may be observed in the third or fourth week after applying common antidepressant medications. We investigate the efficacy and safety of sertraline plus deanxit on patients with depression and anxiety in chronic somatic diseases. METHODS: 75 Patients who met the criteria were randomly assigned to deanxit group or placebo group: sertraline (75 mg/day) plus deanxit (one piece/day) (N = 38), or sertraline (75 mg/day) plus placebo (one piece/day) (N = 37) for 2 weeks, both groups received sertraline (75 mg/day) in the following 2 weeks. Changes from baseline to day 4, day 8, day 15, and day 29 in Hamilton Rating Scale for Depression (HAM-D) and Hamilton Rating Scale for Anxiety (HAM-A) total scores were the efficacy measures. Adverse events were monitored and registered systematically during the trial. RESULTS: Response rates for HAM-D scores in deanxit group and placebo group were significantly different on day 8(55.26% ± 2.56% VS 24.32% ± 2.19%, p = 0.006) and day 15(78.95% ± 3.89% VS 40.54% ± 4.18%, p = 0.001), while no statistical differences were observed on day 4 and day 29. Respectively, response rates for HAM-A scores on day 4 (34.21% ± 2.21% VS 8.11% ± 1.37%, p = 0.006), day 8 (57.89% ± 3.56% VS 18.92% ± 2.68%, p = 0.001) and day 15 (78.95% ± 4.37% VS 43.24% ± 4.68%, p = 0.002), favoring the deanxit group. However, HAM-A scores were not remarkably different at the end point. The overall safety profile of both groups was favorable with no distinct differences. CONCLUSIONS: The efficacy was exhibited in the deanxit group, with evidence for similar safety. The rapid onset of sertraline plus short-term deanxit indicated that it might be an inspiring strategy to manage depression and anxiety within the first two weeks in chronic somatic diseases.


Asunto(s)
Antracenos/administración & dosificación , Ansiedad , Enfermedad Crónica/psicología , Depresión , Flupentixol/administración & dosificación , Sertralina/administración & dosificación , Anciano , Antidepresivos/administración & dosificación , Antipsicóticos/administración & dosificación , Ansiedad/diagnóstico , Ansiedad/tratamiento farmacológico , Ansiedad/etiología , Ansiedad/fisiopatología , Depresión/diagnóstico , Depresión/tratamiento farmacológico , Depresión/etiología , Depresión/fisiopatología , Combinación de Medicamentos , Monitoreo de Drogas/métodos , Quimioterapia Combinada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Escalas de Valoración Psiquiátrica , Resultado del Tratamiento
20.
Eur Psychiatry ; 30(2): 277-83, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25577186

RESUMEN

OBJECTIVES: To assess changes in body mass and metabolic profiles in patients with first-episode schizophrenia receiving standardised, assured treatment and to identify predictors and moderators of the effects. METHODS: We investigated the changes in body mass, fasting blood glucose and lipids in 107 largely antipsychotic naïve, first-episode schizophrenia patients who were treated according to a standard algorithm with long-acting injectable flupenthixol decanoate over 12 months. RESULTS: Eighty-three (78%) participants completed the 12 months of treatment, and 104 (97%) received 100% of the prescribed injections during their participation. There were significant increases in BMI (P<.0001), waist circumference (P=0.0006) and triglycerides (P=0.03) and decrease in HDL (P=0.005), while systolic (P=0.7) and diastolic blood pressure (P=0.8), LDL (P=0.1), cholesterol (P=0.3), and glucose (P=0.9) values did not change over time. The triglyceride: HDL ratio increased by 91%. Change in BMI was only correlated with change in triglycerides (P=.008). The only significant predictor of BMI increase was non-substance abuse (P=.002). CONCLUSIONS: The risks of weight gain and metabolic syndrome associated with antipsychotic treatment in first-episode schizophrenia are not restricted to second generation antipsychotics. This is a global problem, and developing communities may be particularly susceptible.


Asunto(s)
Antipsicóticos/administración & dosificación , Antipsicóticos/efectos adversos , Glucemia/metabolismo , Índice de Masa Corporal , Colesterol/sangre , Flupentixol/análogos & derivados , Síndrome Metabólico/inducido químicamente , Esquizofrenia/tratamiento farmacológico , Triglicéridos/sangre , Adulto , Biomarcadores/sangre , Estudios de Cohortes , Femenino , Flupentixol/administración & dosificación , Flupentixol/efectos adversos , Humanos , Masculino , Síndrome Metabólico/sangre , Metaboloma , Esquizofrenia/sangre , Sudáfrica , Aumento de Peso/efectos de los fármacos
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