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1.
Pharmaceuticals (Basel) ; 16(7)2023 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-37513915

RESUMO

Studies have shown high comorbidity of anxiety disorder and chronic pain; generalized anxiety disorder (GAD) and neuropathic pain are among these pathologies. Cannabidiol (CBD) has been considered a promising treatment for these conditions. This study investigated whether chronic systemic treatment with CBD alters pain in high- (CHF) and low-freezing (CLF) Carioca rats (GAD model) and control rats (CTL) submitted to chronic neuropathic pain. The rats were evaluated in the sensory aspects (von Frey, acetone, and hot plate tests) before the chronic constriction injury of the ischiatic nerve (CCI) or not (SHAM) and on days 13 and 23 after surgery. Chronic treatment with CBD (5 mg/kg daily) was used for ten days, starting the 14th day after surgery. The open field test on the 22nd also evaluated locomotion and anxiety-like behavior. CBD treatment had an anti-allodynic effect on the mechanical and thermal threshold in all lineages; however, these effects were lower in the CHF and CLF lineages. Considering emotional evaluation, we observed an anxiolytic effect in CTL+CCI and CHF+CCI after CBD treatment and increased mobility in CLF+SHAM rats. These results suggest that the CBD mechanical anti-allodynic and emotional effects can depend on anxiety level.

3.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 44(1): 15-20, Jan.-Feb. 2022. graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1360183

RESUMO

Objective: To compare plasma concentrations of cannabidiol (CBD) following oral administration of two formulations of the drug (powder and dissolved in oil), and to evaluate the effects of these distinct formulations on responses to emotional stimuli in healthy human volunteers. Methods: In a randomized, double-blind, placebo-controlled, parallel-group design, 45 healthy male volunteers were randomly assigned to three groups of 15 subjects that received either 150 mg of CBD powder; 150 mg of CBD dissolved in corn oil; or placebo. Blood samples were collected at different times after administration, and a facial emotion recognition task was completed after 150 min. Results: There were no significant differences across groups in the subjective and physiological measures, nor in the facial emotion recognition task. However, groups that received the drug showed statistically significant differences in baseline measures of plasma CBD, with a significantly greater difference in favor of the oil formulation. Conclusion: When administered as a single 150-mg dose, neither formulation of oral CBD altered responses to emotional stimuli in healthy subjects. The oil-based CBD formulation resulted in more rapid achievement of peak plasma level, with an approximate fourfold increase in oral bioavailability.

4.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 43(5): 477-483, Sept.-Oct. 2021. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1345469

RESUMO

Objective: The aim of the present study was to analyze the body sway response in specific phobia (SP) patients and healthy controls while viewing neutral, phobic, and disgusting images. Methods: The participants' heart rate (HR) and skin conductance were also recorded during the procedure. Nineteen patients with arachnophobia and 19 healthy volunteers matched by age, gender, and years of education underwent a postural control test on a stabilometric platform. Results: The platform recorded increased body sway in the SP group when exposed to spider images (SPI). The SP group presented increases in most parameters (SD, velocity, frequency, area, p ≤ 0.05) when viewing pictures of the SPI category. Psychometric measures of subjective anxiety (State-Trait Anxiety Inventory, STAI) and physiological states (HR; skin conductance responses; spontaneous fluctuations in skin conductance) showed increased anxiety (p ≤ 0.05) in the SP group compared to healthy volunteers. High anxiety levels were observed throughout the assessment, including the task of exposure to SPI (p ≤ 0.05). No significant effect or correlation was found between skin conductance and body sway measures (p > 0.05). Conclusions: The results of the postural control test suggest the occurrence of a defensive escape response in SP, in agreement with previous evidence.


Assuntos
Transtornos Fóbicos , Aranhas , Ansiedade , Transtornos de Ansiedade , Frequência Cardíaca
5.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 43(5): 467-476, Sept.-Oct. 2021. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1345480

RESUMO

Objective: To assess the efficacy of cannabidiol (CBD) in the management of crack-cocaine craving and the treatment of frequent withdrawal symptoms. Methods: Thirty-one men with a diagnosis of crack-cocaine dependence were enrolled in a randomized, double-blind, placebo-controlled trial. We applied neuropsychological tests and assessed craving intensity, anxiety and depression symptoms, and substance use patterns at baseline and at the end of the trial. The participants were treated with CBD 300 mg/day or placebo for 10 days. During this period, we used a technique to induce craving and assessed the intensity of symptoms before and after the induction procedure. Results: Craving levels reduced significantly over the 10 days of the trial, although no differences were found between the CBD and placebo groups. Craving induction was successful in both groups, with no significant differences between them. Indicators of anxiety, depression, and sleep alterations before and after treatment also did not differ across groups. Conclusion: Under the conditions of this trial, CBD was unable to interfere with symptoms of crack-cocaine withdrawal. Further studies with larger outpatient samples involving different doses and treatment periods would be desirable and timely to elucidate the potential of CBD to induce reductions in crack-cocaine self-administration.


Assuntos
Humanos , Masculino , Canabidiol , Cocaína Crack , Transtornos Relacionados ao Uso de Cocaína/tratamento farmacológico , Método Duplo-Cego , Fissura
6.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 42(2): 218-224, Mar.-Apr. 2020.
Artigo em Inglês | LILACS | ID: biblio-1089257

RESUMO

Current pharmacotherapy of Parkinson's disease (PD) is palliative and unable to modify the progression of neurodegeneration. Treatments that can improve patients' quality of life with fewer side effects are needed, but not yet available. Cannabidiol (CBD), the major non-psychotomimetic constituent of cannabis, has received considerable research attention in the last decade. In this context, we aimed to critically review the literature on potential therapeutic effects of CBD in PD and discuss clinical and preclinical evidence supporting the putative neuroprotective mechanisms of CBD. We searched MEDLINE (via PubMed) for indexed articles published in English from inception to 2019. The following keywords were used: cannabis; cannabidiol and neuroprotection; endocannabinoids and basal ganglia; Parkinson's animal models; Parkinson's history; Parkinson's and cannabidiol. Few studies addressed the biological bases for the purported effects of CBD on PD. Six preclinical studies showed neuroprotective effects, while three targeted the antidyskinetic effects of CBD. Three human studies have tested CBD in patients with PD: an open-label study, a case series, and a randomized controlled trial. These studies reported therapeutic effects of CBD on non-motor symptoms. Additional research is needed to elucidate the potential effectiveness of CBD in PD and the underlying mechanisms involved.


Assuntos
Humanos , Animais , Doença de Parkinson/tratamento farmacológico , Canabidiol/uso terapêutico , Fármacos Neuroprotetores/uso terapêutico , Modelos Animais de Doenças , Estudos Clínicos como Assunto
7.
JAMA Netw Open ; 2(11): e1916097, 2019 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-31774520

RESUMO

Importance: Depression is highly prevalent among physicians and has been associated with increased risk of medical errors. However, questions regarding the magnitude and temporal direction of these associations remain open in recent literature. Objective: To provide summary relative risk (RR) estimates for the associations between physician depressive symptoms and medical errors. Data Sources: A systematic search of Embase, ERIC, PubMed, PsycINFO, Scopus, and Web of Science was performed from database inception to December 31, 2018. Study Selection: Peer-reviewed empirical studies that reported on a valid measure of physician depressive symptoms associated with perceived or observed medical errors were included. No language restrictions were applied. Data Extraction and Synthesis: Study characteristics and RR estimates were extracted from each article. Estimates were pooled using random-effects meta-analysis. Differences by study-level characteristics were estimated using subgroup meta-analysis and metaregression. The Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guideline was followed. Main Outcomes and Measures: Relative risk estimates for the associations between physician depressive symptoms and medical errors. Results: In total, 11 studies involving 21 517 physicians were included. Data were extracted from 7 longitudinal studies (64%; with 5595 individuals) and 4 cross-sectional studies (36%; with 15 922 individuals). The overall RR for medical errors among physicians with a positive screening for depression was 1.95 (95% CI, 1.63-2.33), with high heterogeneity across the studies (χ2 = 49.91; P < .001; I2 = 82%; τ2 = 0.06). Among the variables assessed, study design explained the most heterogeneity across studies, with lower RR estimates associated with medical errors in longitudinal studies (RR, 1.62; 95% CI, 1.43-1.84; χ2 = 5.77; P = .33; I2 = 13%; τ2 < 0.01) and higher RR estimates in cross-sectional studies (RR, 2.51; 95% CI, 2.20-2.83; χ2 = 5.44; P = .14; I2 = 45%; τ2 < 0.01). Similar to the results for the meta-analysis of physician depressive symptoms associated with subsequent medical errors, the meta-analysis of 4 longitudinal studies (involving 4462 individuals) found that medical errors associated with subsequent depressive symptoms had a pooled RR of 1.67 (95% CI, 1.48-1.87; χ2 = 1.85; P = .60; I2 = 0%; τ2 = 0), suggesting that the association between physician depressive symptoms and medical errors is bidirectional. Conclusions and Relevance: Results of this study suggest that physicians with a positive screening for depressive symptoms are at higher risk for medical errors. Further research is needed to evaluate whether interventions to reduce physician depressive symptoms could play a role in mitigating medical errors and thus improving physician well-being and patient care.


Assuntos
Depressão/psicologia , Erros Médicos/estatística & dados numéricos , Inabilitação do Médico/psicologia , Depressão/epidemiologia , Humanos , Erros Médicos/psicologia , Inabilitação do Médico/estatística & dados numéricos
8.
Rev. bras. psiquiatr ; 41(1): 9-14, Jan.-Mar. 2019. tab, graf
Artigo em Inglês | LILACS | ID: biblio-985360

RESUMO

Objective: Cannabidiol (CBD), one of the non-psychotomimetic compounds of Cannabis sativa, causes anxiolytic-like effects in animals, with typical bell-shaped dose-response curves. No study, however, has investigated whether increasing doses of this drug would also cause similar curves in humans. The objective of this study was to compare the acute effects of different doses of CBD and placebo in healthy volunteers performing a simulated public speaking test (SPST), a well-tested anxiety-inducing method. Method: A total of 57 healthy male subjects were allocated to receive oral CBD at doses of 150 mg (n=15), 300 mg (n=15), 600 mg (n=12) or placebo (n=15) in a double-blind procedure. During the SPST, subjective ratings on the Visual Analogue Mood Scale (VAMS) and physiological measures (systolic and diastolic blood pressure, heart rate) were obtained at six different time points. Results: Compared to placebo, pretreatment with 300 mg of CBD significantly reduced anxiety during the speech. No significant differences in VAMS scores were observed between groups receiving CBD 150 mg, 600 mg and placebo. Conclusion: Our findings confirm the anxiolytic-like properties of CBD and are consonant with results of animal studies describing bell-shaped dose-response curves. Optimal therapeutic doses of CBD should be rigorously determined so that research findings can be adequately translated into clinical practice.


Assuntos
Humanos , Masculino , Ansiedade/tratamento farmacológico , Fala/efeitos dos fármacos , Ansiolíticos/administração & dosagem , Canabidiol/administração & dosagem , Fatores Socioeconômicos , Método Duplo-Cego , Relação Dose-Resposta a Droga
9.
Toxicol Appl Pharmacol ; 368: 63-71, 2019 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-30796934

RESUMO

Cannabidiol (CBD) is a natural compound with psychoactive therapeutic properties well described. Conversely, the immunological effects of CBD are still poorly explored. In this study, the potential anti-inflammatory effects and underlying mechanisms of CBD and its analog Dimethyl-Heptyl-Cannabidiol (DMH-CBD) were investigated using RAW 264.7 macrophages. CBD and DMH-CBD suppressed LPS-induced TNF production and NF-kB activity in a concentration-dependent manner. Both compounds reduced the NF-kB activity in a µM concentration range: CBD (IC50 = 15 µM) and DMH-CBD (IC50 = 38 µM). However, the concentrations of CBD that mediated NF-kB inhibition were similar to those that cause cytotoxicity (LC50 = 58 µM). Differently, DMH-CBD inhibited the NF-kB activation without cytotoxic effects at the same concentrations, although it provokes cytotoxicity at long-term exposure. The inhibitory action of the DMH-CBD on NF-kB activity was not related to the reduction in IkBα degradation or either p65 (NF-kB) translocation to the nucleus, although it decreased p38 MAP kinase phosphorylation. Additionally, 8-(3-Chlorostyryl) caffeine (CSC), an A2A antagonist, reversed the effect of DMH-CBD on NF-kB activity in a concentration-dependent manner. Collectively, our results demonstrated that CBD reduces NF-kB activity at concentrations intimately associated with those that cause cell death, whereas DMH-CBD decreases NF-kB activity at non-toxic concentrations in an A2A receptor dependent-manner.


Assuntos
Agonistas do Receptor A2 de Adenosina/farmacologia , Canabidiol/análogos & derivados , Canabidiol/farmacologia , Macrófagos/efeitos dos fármacos , NF-kappa B/metabolismo , Receptor A2A de Adenosina/efeitos dos fármacos , Fator de Necrose Tumoral alfa/metabolismo , Agonistas do Receptor A2 de Adenosina/toxicidade , Animais , Canabidiol/química , Canabidiol/toxicidade , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Humanos , Concentração Inibidora 50 , Macrófagos/metabolismo , Macrófagos/patologia , Camundongos , Fosforilação , Células RAW 264.7 , Receptor A2A de Adenosina/metabolismo , Via Secretória , Transdução de Sinais , Células THP-1 , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
10.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 38(4): 318-324, Oct.-Dec. 2016. tab
Artigo em Inglês | LILACS | ID: lil-798087

RESUMO

Objective: To examine association of sociodemographic characteristics, personality traits, social skills, and work variables with anxiety, depression, and alcohol dependence in medical residents. Methods: A total of 270 medical residents completed the following self-report instruments: sociodemographic and work questionnaire, Patient Health Questionnaire-4 (PHQ-4), Alcohol Use Disorders Identification Test-3 (AUDIT-3), Revised NEO-Five Factor Inventory (NEO-FFI-R), and Social Skills Inventory (SSI-Del-Prette). Data were analyzed using descriptive statistics and univariate and multivariate logistic regression analyses. Results: Multivariate analysis showed an association of neuroticism (odds ratio [OR] 2.60, p < 0.001), social skills (OR 0.41, p < 0.01), and number of shifts (OR 1.91, p = 0.03) with anxiety or depression, and of male sex (OR 3.14, p = 0.01), surgical residency (OR 4.40, p = 0.001), extraversion (OR 1.80, p < 0.01), and number of shifts (OR 2.32, p = 0.04) with alcohol dependence. Conclusion: The findings support a multidetermined nature of mental health problems in medical residents, in addition to providing data that may assist in the design of preventive measures to protect the mental health of this group.


Assuntos
Humanos , Masculino , Feminino , Adulto , Transtornos de Ansiedade/epidemiologia , Esgotamento Profissional/epidemiologia , Saúde Mental , Transtorno Depressivo/epidemiologia , Alcoolismo/epidemiologia , Internato e Residência/estatística & dados numéricos , Transtornos de Ansiedade/psicologia , Inventário de Personalidade , Fatores Socioeconômicos , Brasil/epidemiologia , Esgotamento Profissional/psicologia , Modelos Logísticos , Análise Multivariada , Inquéritos e Questionários , Carga de Trabalho , Transtorno Depressivo/psicologia , Alcoolismo/psicologia
11.
Arch. Clin. Psychiatry (Impr.) ; 43(6): 151-156, Nov.-Dec. 2016. tab, ILUS
Artigo em Inglês | LILACS | ID: biblio-830764

RESUMO

Abstract Background: Neuroimaging studies are an invaluable source of information about the physiopathology of schizophrenia. Arterial spin labeling (ASL) is a new magnetic resonance technique (MRI) that is able to effectively evaluate brain function without the use of radiation. Objective: To make a systematic review of studies using ASL to compare resting-state regional cerebral blood flow (rCBF) patterns in patients with schizophrenia and healthy controls. Methods: Original articles were searched for on PubMed, Scopus, Web of Science and PsycINFO electronic databases. The search terms used were 'arterial', 'spin', 'labeling', and 'schizophrenia'. Only studies comparing resting-state rCBF were included, a qualitative synthesis was then performed. Results: Ten articles were included in the review among a total of 22. Decreased rCBF in schizophrenia patients was described in the anterior cingulate, cuneus, fusiform gyrus, frontal lobe, left middle frontal gyrus, inferior frontal gyrus, lingual gyrus, middle occipital gyrus, and parietal lobe. The putamen was the only region with increased rCBF in schizophrenia. Discussion: The evidence of the studies reviewed lends support to the concept of hipofrontality in schizophrenia. rCBF alterations were found in regions classically associated with schizophrenia. ASL seems to be valid, and reliable tool to assess schizophrenia.


Assuntos
Humanos , Masculino , Feminino , Esquizofrenia/fisiopatologia , Neurologia , Imageamento por Ressonância Magnética , Neuropatologia
12.
Front Pharmacol ; 7: 359, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27746737

RESUMO

Animal studies and preliminary clinical trials have shown that cannabidiol (CBD)-enriched extracts may have beneficial effects for children with treatment-resistant epilepsy. However, these compounds are not yet registered as medicines by regulatory agencies. We describe the cases of two children with treatment-resistant epilepsy (Case A with left frontal dysplasia and Case B with Dravet Syndrome) with initial symptom improvement after the introduction of CBD extracts followed by seizure worsening after a short time. The children presented typical signs of intoxication by Δ9-THC (inappropriate laughter, ataxia, reduced attention, and eye redness) after using a CBD-enriched extract. The extract was replaced by the same dose of purified CBD with no Δ9-THC in both cases, which led to improvement in intoxication signs and seizure remission. These cases support pre-clinical and preliminary clinical evidence suggesting that CBD may be effective for some patients with epilepsy. Moreover, the cases highlight the need for randomized clinical trials using high-quality and reliable substances to ascertain the safety and efficacy of cannabinoids as medicines.

13.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 37(1): 13-20, Jan-Mar/2015. tab, graf
Artigo em Inglês | LILACS | ID: lil-741933

RESUMO

Objectives: Ayahuasca (AYA), a natural psychedelic brew prepared from Amazonian plants and rich in dimethyltryptamine (DMT) and harmine, causes effects of subjective well-being and may therefore have antidepressant actions. This study sought to evaluate the effects of a single dose of AYA in six volunteers with a current depressive episode. Methods: Open-label trial conducted in an inpatient psychiatric unit. Results: Statistically significant reductions of up to 82% in depressive scores were observed between baseline and 1, 7, and 21 days after AYA administration, as measured on the Hamilton Rating Scale for Depression (HAM-D), the Montgomery-Åsberg Depression Rating Scale (MADRS), and the Anxious-Depression subscale of the Brief Psychiatric Rating Scale (BPRS). AYA administration resulted in nonsignificant changes in Young Mania Rating Scale (YMRS) scores and in the thinking disorder subscale of the BPRS, suggesting that AYA does not induce episodes of mania and/or hypomania in patients with mood disorders and that modifications in thought content, which could indicate psychedelic effects, are not essential for mood improvement. Conclusions: These results suggest that AYA has fast-acting anxiolytic and antidepressant effects in patients with a depressive disorder. .


Assuntos
Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Antidepressivos/uso terapêutico , Banisteriopsis/química , Transtorno Depressivo/tratamento farmacológico , Alucinógenos/uso terapêutico , Fitoterapia , Análise de Variância , Ansiolíticos/uso terapêutico , Escalas de Graduação Psiquiátrica Breve , Harmina/uso terapêutico , N,N-Dimetiltriptamina/uso terapêutico , Índice de Gravidade de Doença , Fatores de Tempo , Resultado do Tratamento
14.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 37(1): 71-79, Jan-Mar/2015. tab, graf
Artigo em Inglês | LILACS | ID: lil-741940

RESUMO

Objective: Schizophrenia is one of the most severe psychiatric disorders, and its current treatment relies on antipsychotic medications with only partial effectiveness. Clozapine is an atypical antipsychotic with a specific profile of action indicated for treatment-resistant schizophrenia. Neuroimaging studies assessing the effects of clozapine could help shed light on the neural underpinnings of the effects of this drug in the brain. The objective of this study was to review the available literature on the structural and functional neuroimaging findings associated with use of clozapine. Method: We conducted a systematic review of the indexed literature using the PubMed, BIREME, and ISI Web of Knowledge search engines and the following keywords: clozapine, neuroimaging, computed tomography, MRI, functional magnetic resonance, PET, SPECT, and DTI. Results: A total of 23 articles were included in the review. In structural studies, the use of clozapine was associated with volume reductions in the basal ganglia, especially the caudate nucleus, where functional neuroimaging studies also found decreased perfusion. In the frontal lobe, clozapine treatment was associated with increased gray matter volume and reduced perfusion. Conclusion: The results of the studies reviewed suggest that the use of clozapine is associated with distinctive structural and functional neuroimaging findings that are not shared with other antipsychotics. .


Assuntos
Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Transtornos Cognitivos/etiologia , Potenciais Evocados/fisiologia , Esquizofrenia/complicações , Psicologia do Esquizofrênico , Análise de Variância , Eletroencefalografia , Testes Neuropsicológicos , Resolução de Problemas , Tempo de Reação/fisiologia , Estatística como Assunto
15.
Neuropsychopharmacology ; 40(6): 1343-52, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25249057

RESUMO

There is now considerable evidence to support the hypothesis that psychotic symptoms are the result of abnormal salience attribution, and that the attribution of salience is largely mediated through the prefrontal cortex, the striatum, and the hippocampus. Although these areas show differential activation under the influence of delta-9-tetrahydrocannabinol (delta-9-THC) and cannabidiol (CBD), the two major derivatives of cannabis sativa, little is known about the effects of these cannabinoids on the functional connectivity between these regions. We investigated this in healthy occasional cannabis users by employing event-related functional magnetic resonance imaging (fMRI) following oral administration of delta-9-THC, CBD, or a placebo capsule. Employing a seed cluster-based functional connectivity analysis that involved using the average time series from each seed cluster for a whole-brain correlational analysis, we investigated the effect of drug condition on functional connectivity between the seed clusters and the rest of the brain during an oddball salience processing task. Relative to the placebo condition, delta-9-THC and CBD had opposite effects on the functional connectivity between the dorsal striatum, the prefrontal cortex, and the hippocampus. Delta-9-THC reduced fronto-striatal connectivity, which was related to its effect on task performance, whereas this connection was enhanced by CBD. Conversely, mediotemporal-prefrontal connectivity was enhanced by delta-9-THC and reduced by CBD. Our results suggest that the functional integration of brain regions involved in salience processing is differentially modulated by single doses of delta-9-THC and CBD and that this relates to the processing of salient stimuli.


Assuntos
Atenção/efeitos dos fármacos , Encéfalo/efeitos dos fármacos , Canabidiol/farmacologia , Dronabinol/farmacologia , Psicotrópicos/farmacologia , Adulto , Atenção/fisiologia , Encéfalo/fisiopatologia , Mapeamento Encefálico , Cannabis , Humanos , Imageamento por Ressonância Magnética , Masculino , Fumar Maconha/fisiopatologia , Vias Neurais/efeitos dos fármacos , Vias Neurais/fisiopatologia , Testes Neuropsicológicos
16.
Schizophr Res ; 161(2-3): 439-45, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25497439

RESUMO

Increasing evidence suggests that the tetracycline antibiotic minocycline has neuroprotective effects and is a potential treatment for schizophrenia. However, the mechanisms of action of minocycline in the CNS remain elusive. The aim of this study was to investigate the effects of minocycline on brain morphology and cerebral perfusion in patients with recent-onset schizophrenia after 12months of a randomized double-blind, placebo-controlled clinical trial of minocycline add-on treatment. This study included 24 outpatients with recent-onset schizophrenia randomized for 12months of adjuvant treatment with minocycline (200mg/d) or placebo. MRI (1.5T) and [(99m)Tc]-ECD SPECT brain scans were performed at the end of the 12-month of trial. Between-condition comparisons of SPECT and MRI brain images were performed using statistical parametric mapping and analyzed by voxel-based morphometry (VBM). Minocycline adjuvant treatment significantly reduced positive and negative symptoms when compared with placebo. The VBM analysis of MRI scans showed that the patients in the placebo group had significant lower gray matter volumes in the midposterior cingulate cortex and in the precentral gyrus in comparison with the patients in the minocycline group. In addition, a decreased ECD uptake in the minocycline condition was observed in fronto-temporal areas. These results suggest that minocycline may protect against gray matter loss and modulate fronto-temporal areas involved in the pathophysiology of schizophrenia. Furthermore, minocycline add-on treatment may be a potential treatment in the early stages of schizophrenia and may ameliorate clinical deterioration and brain alterations observed in this period.


Assuntos
Antipsicóticos/uso terapêutico , Encéfalo/efeitos dos fármacos , Minociclina/uso terapêutico , Esquizofrenia/tratamento farmacológico , Adulto , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Circulação Cerebrovascular/efeitos dos fármacos , Cisteína/análogos & derivados , Método Duplo-Cego , Quimioterapia Combinada , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Tamanho do Órgão , Compostos de Organotecnécio , Escalas de Graduação Psiquiátrica , Compostos Radiofarmacêuticos , Esquizofrenia/diagnóstico por imagem , Esquizofrenia/patologia , Processamento de Sinais Assistido por Computador , Fatores de Tempo , Tomografia Computadorizada de Emissão de Fóton Único , Resultado do Tratamento , Adulto Jovem
17.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 36(3): 245-247, Jul-Sep/2014. tab
Artigo em Inglês | LILACS | ID: lil-718439

RESUMO

Objective: To assess the discriminative capacity of the Kenny Music Performance Anxiety Inventory (K-MPAI), in its version adapted for Brazil, in a sample of 230 Brazilian adult musicians. Method: The Social Phobia Inventory (SPIN) was used to assess the presence of social anxiety indicators, adopting it as the gold standard. The Mann-Whitney U test and the receiver operating characteristic (ROC) curve were used for statistical analysis, with p ≤ 0.05 set as the significance level. Results: Subjects with social anxiety indicators exhibited higher mean total K-MPAI scores, as well as higher individual scores on 62% of its items. The area under the ROC curve was 0.734 (p = 0.001), and considered appropriate. Within the possible cutoff scores presented, the score -15 had the best balance of sensitivity and specificity values. However, the score -7 had greater specificity and accuracy. Conclusion: The K-MPAI showed appropriate discriminant validity, with a marked association between music performance anxiety and social anxiety. The cutoff scores presented in the study have both clinical and research value, allowing screening for music performance anxiety and identification of possible cases. .


Assuntos
Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Música/psicologia , Ansiedade de Desempenho/psicologia , Brasil , Ansiedade de Desempenho/diagnóstico , Psicometria , Curva ROC , Valores de Referência , Reprodutibilidade dos Testes , Estatísticas não Paramétricas
18.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 35(4): 406-415, Oct-Dec. 2013.
Artigo em Inglês | LILACS | ID: lil-697332

RESUMO

Objective: To present the most relevant findings regarding the Brazilian Medical Association guidelines for the diagnosis and differential diagnosis of panic disorder. Methods: We used the methodology proposed by the Brazilian Medical Association for the Diretrizes Project. The MEDLINE (PubMed), Scopus, Web of Science, and LILACS online databases were queried for articles published from 1980 to 2012. Searchable questions were structured using the PICO format (acronym for “patient” [or population], “intervention” [or exposure], “comparison” [or control], and “outcome”). Results: We present data on clinical manifestations and implications of panic disorder and its association with depression, drug abuse, dependence and anxiety disorders. In addition, discussions were held on the main psychiatric and clinical differential diagnoses. Conclusions: The guidelines are proposed to serve as a reference for the general practitioner and specialist to assist in and facilitate the diagnosis of panic disorder. .


Assuntos
Humanos , Transtornos de Ansiedade/diagnóstico , Transtorno de Pânico/diagnóstico , Transtornos de Ansiedade/psicologia , Brasil , Transtorno Depressivo/diagnóstico , Diagnóstico Diferencial , Transtorno de Pânico/psicologia , Doença de Parkinson , Transtornos Fóbicos/diagnóstico , Sociedades Médicas
19.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 35(4): 380-386, Oct-Dec. 2013. graf
Artigo em Inglês | LILACS | ID: lil-697333

RESUMO

Objective: To investigate the effects of cannabidiol (CBD) on mitochondrial complex and creatine kinase (CK) activity in the rat brain using spectrophotometry. Method: Male adult Wistar rats were given intraperitoneal injections of vehicle or CBD (15, 30, or 60 mg/kg) in an acute (single dose) or chronic (once daily for 14 consecutive days) regimen. The activities of mitochondrial complexes and CK were measured in the hippocampus, striatum, and prefrontal cortex. Results: Both acute and chronic injection of CBD increased the activity of the mitochondrial complexes (I, II, II-III, and IV) and CK in the rat brain. Conclusions: Considering that metabolism impairment is certainly involved in the pathophysiology of mood disorders, the modulation of energy metabolism (e.g., by increased mitochondrial complex and CK activity) by CBD could be an important mechanism implicated in the action of CBD. .


Assuntos
Animais , Masculino , Ratos , Encéfalo/efeitos dos fármacos , Canabidiol/administração & dosagem , Creatina Quinase/metabolismo , Mitocôndrias/efeitos dos fármacos , Encéfalo/metabolismo , Mitocôndrias/metabolismo , Ratos Wistar
20.
Arq. neuropsiquiatr ; 71(6): 392-396, jun. 2013. tab
Artigo em Inglês | LILACS | ID: lil-677608

RESUMO

We assessed the functional impairment in Charcot-Marie-Tooth resulting from 17p11.2-p12 duplication (CMT1A) patients using the Short-Form Health Survey (SF-36), which is a quality of life questionnaire. Twenty-five patients of both genders aged ≥10 years with a positive molecular diagnosis of CMT1A were selected. Age- and gender-matched Control Group (without family history of neuropathy), and the sociodemographic and professional conditions similar to the patients' group were selected to compare the SF-36 results between them. The results showed that the majority quality of life impairments in CMT1A patients occurred in the social and emotional domains. Functional capacity also tended to be significantly affected; other indicators of physical impairment were preserved. In conclusion, social and emotional aspects are mostly neglected in the assistance provided to CMT1A Brazilian patients, and they should be better understood in order to offer global health assistance with adequate quality of life as a result.

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Avaliou-se o comprometimento funcional de pacientes com Charcot-Marie-Tooth provenientes da duplicação 17p11.2-p12 (CMT1A), utilizando o SF-36, que é um questionário para medir a qualidade de vida. Vinte e cinco pacientes de ambos os sexos com idades ≥10 anos e diagnóstico molecular de CMT1A foram selecionados. Idade, sexo, condições sociodemográficas e profissionais foram pareados com o Grupo Controle (sem histórico familiar de neuropatia). Os resultados mostraram que o maior impacto da CMT1A na qualidade de vida ocorreu nos domínios social e emocional dos pacientes avaliados. A capacidade funcional também tende a ser significativamente afetada, enquanto outros indicadores de deficiência física foram preservados. Por fim, os aspectos sociais e emocionais dos pacientes acometidos por CMT1A costumam ser negligenciados na assistência médica prestada aos pacientes brasileiros, e devem ser melhor compreendidos a fim de oferecer uma assistência global à saúde, resultando em adequada qualidade de vida.

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Assuntos
Adolescente , Adulto , Idoso , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Doença de Charcot-Marie-Tooth/fisiopatologia , Doença de Charcot-Marie-Tooth/psicologia , Qualidade de Vida/psicologia , Fatores Etários , Métodos Epidemiológicos , Proteínas/genética , Fatores Sexuais , Fatores Socioeconômicos , Trissomia
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