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1.
BMJ Open ; 14(1): e081969, 2024 01 29.
Artigo em Inglês | MEDLINE | ID: mdl-38286705

RESUMO

INTRODUCTION: Post-traumatic symptoms are common among patients discharged from intensive care units (ICUs), adversely affecting well-being, increasing healthcare utilisation and delaying return to work. Non-pharmacological approaches (eg, music, therapeutic touch and patient diaries) have been suggested as candidate interventions and trauma-focused psychological interventions have been endorsed by international bodies. Neither category of intervention is supported by definitive evidence of long-term clinical effectiveness in patients who have been critically ill. This study assesses the feasibility and acceptability of using eye-movement desensitisation and reprocessing (EMDR) to improve the mental health of ICU survivors. METHODS AND ANALYSIS: EMERALD is a multicentre, two-part consent, pilot feasibility study, recruiting discharged ICU survivors from three hospitals in the UK. We are gathering demographics and measuring post-traumatic symptoms, anxiety, depression and quality of life at baseline. Two months after discharge, participants are screened for symptoms of post-traumatic stress disorder (PTSD) using the Impact of Events Scale-Revised (IES-R). Patients with IES-R scores<22 continue in an observation arm for 12 month follow-up. IES-R scores≥22 indicate above-threshold PTSD symptoms and trigger invitation to consent for part B: a randomised controlled trial (RCT) of EMDR versus usual care, with 1:1 randomisation. The study assesses feasibility (recruitment, retention and intervention fidelity) and acceptability (through semistructured interviews), using a theoretical acceptability framework. Clinical outcomes (PTSD, anxiety, depression and quality of life) are collected at baseline, 2 and 12 months, informing power calculations for a definitive RCT, with quantitative and qualitative data convergence guiding RCT refinements. ETHICS AND DISSEMINATION: This study has undergone external expert peer review and is funded by the National Institute for Health and Care Research (grant number: NIHR302160). Ethical approval has been granted by South Central-Hampshire A Research Ethics Committee (IRAS number: 317291). Results will be disseminated through the lay media, social media, peer-reviewed publication and conference presentation. TRIAL REGISTRATION NUMBER: NCT05591625.


Assuntos
Dessensibilização e Reprocessamento através dos Movimentos Oculares , Saúde Mental , Humanos , Alta do Paciente , Dessensibilização e Reprocessamento através dos Movimentos Oculares/métodos , Estudos de Viabilidade , Cuidados Críticos , Sobreviventes , Hospitais , Ensaios Clínicos Controlados Aleatórios como Assunto
2.
Mar Pollut Bull ; 190: 114843, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36965263

RESUMO

Atlantic haddock (Melanogrammus aeglefinus) embryos bind dispersed crude oil droplets to the eggshell and are consequently highly susceptible to toxicity from spilled oil. We established thresholds for developmental toxicity and identified any potential long-term or latent adverse effects that could impair the growth and survival of individuals. Embryos were exposed to oil for eight days (10, 80 and 300 µg oil/L, equivalent to 0.1, 0.8 and 3.0 µg TPAH/L). Acute and delayed mortality were observed at embryonic, larval, and juvenile stages with IC50 = 2.2, 0.39, and 0.27 µg TPAH/L, respectively. Exposure to 0.1 µg TPAH/L had no negative effect on growth or survival. However, yolk sac larvae showed significant reduction in the outgrowth (ballooning) of the cardiac ventricle in the absence of other extracardiac morphological defects. Due to this propensity for latent sublethal developmental toxicity, we recommend an effect threshold of 0.1 µg TPAH/L for risk assessment models.


Assuntos
Gadiformes , Hidrocarbonetos Aromáticos , Poluição por Petróleo , Petróleo , Hidrocarbonetos Policíclicos Aromáticos , Poluentes Químicos da Água , Humanos , Animais , Petróleo/toxicidade , Petróleo/análise , Gadiformes/metabolismo , Larva/metabolismo , Hidrocarbonetos Policíclicos Aromáticos/toxicidade , Hidrocarbonetos Policíclicos Aromáticos/metabolismo , Poluentes Químicos da Água/análise
3.
Brain Behav Immun ; 81: 105-110, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31163212

RESUMO

BACKGROUND: Extensive research into psychoneuroimmunology has led to substantial advances in our understanding of the reciprocal interactions between the central nervous system and the immune system in neuropsychiatric disorders. To date, inflammation has been implicated in the pathogenesis of depression and anxiety. The immunomodulating effects of antidepressants on depression have been reported, however, there is no evidence of the similar effects of antidepressants on anxiety. The aim of the study was to investigate the effects of selective serotonin reuptake inhibitors (SSRIs) on peripheral inflammatory cytokines in patients with first episode generalized anxiety disorder (GAD). METHODS: A prospective cohort design was employed: 42 patients with first episode GAD were treated with either escitalopram or sertraline for 12 weeks. Anxiety was measured by the Generalized Anxiety Disorder Scale and the State Trait Anxiety Inventory, serum pro-inflammatory cytokine levels were measured by the enzyme-linked immunosorbent assay (ELISA), and CRP determined by an immunoturbidimetric method before and after SSRIs treatment RESULTS: Baseline levels of anxiety and pro-inflammatory cytokines including IL-1α, IL-6, IL-8, IL-12, IFN-γ, and CRP were significantly reduced after treatment of SSRIs (p < 0.05 in all cases). In addition, the change of anxiety measures co-vary with the change of peripheral cytokine levels (p < 0.05 in all cases). The regression model revealed that log transformed baseline levels of CRP and IL-6 predicted treatment response (p < 0.05 in both cases). CONCLUSIONS: This study is the first to investigate the effects of SSRIs on pro-inflammatory cytokines in patients with first episode GAD. The findings indicate moderate acute anti-inflammatory effects of SSRIs in GAD, and suggest that these anti-inflammatory effects may underlie anxiolytic effects of SSRIs. The study also indicates that serum levels of CRP and IL-6 may predict treatment response. However, data from randomized controlled trials is warranted to confirm these findings.


Assuntos
Transtornos de Ansiedade/tratamento farmacológico , Transtornos de Ansiedade/imunologia , Inibidores Seletivos de Recaptação de Serotonina/uso terapêutico , Adulto , Idoso , Ansiolíticos , Antidepressivos/uso terapêutico , Ansiedade/sangue , Ansiedade/tratamento farmacológico , Transtornos de Ansiedade/sangue , Proteína C-Reativa/análise , Citalopram/uso terapêutico , Estudos de Coortes , Citocinas/efeitos dos fármacos , Depressão/tratamento farmacológico , Transtorno Depressivo/tratamento farmacológico , Feminino , Humanos , Interleucina-12/análise , Interleucina-12/sangue , Interleucina-6/análise , Interleucina-6/sangue , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Sertralina/uso terapêutico
4.
Int J Yoga ; 12(1): 78-83, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30692788

RESUMO

AIM: This study aims to evaluate the feasibility and effects of instruction in yogic breathing techniques (Pranayama) in patients with treatment-resistant generalized anxiety disorder (GAD) in UK secondary mental health services settings. MATERIALS AND METHODS: Participants were adult primary or secondary care patients with a primary diagnosis of GAD (with or without comorbidity) and persistent anxiety symptoms of at least moderate intensity, despite prior treatment with two or more medications of proven efficacy. Patients participated in group-delivered yogic breathing training and practice for 12 weeks. Structured assessments were performed at baseline, after 1, 2, and 6 weeks of instruction, and at end-point. Participants also completed the antisaccade (emotional variant) task and startle response task at baseline and end-point. RESULTS: At baseline, participating patients (n = 9) had moderate-to-severe anxiety symptoms and mild-to-moderate depressive symptoms, they attended 84% of offered sessions and provided positive feedback on the content and delivery of treatment. Symptom severity reduced significantly from baseline to end-point. There were greater errors on negative trials compared to neutral trials in the antisaccade task at baseline, and a significant reduction in antisaccade errors for negative stimuli as compared to neutral stimuli between baseline and end-point: but there were no significant differences in either mean heart rate or startle response between baseline and end-point. LIMITATIONS: The absence of a control group and small sample size. CONCLUSION: Yogic breathing techniques proved simple to learn and may be beneficial in reducing anxiety and depressive symptoms in patients with treatment-resistant GAD. Yogic breathing had no effect on autonomic arousal, but the reduction in errors to negative stimuli in the antisaccade task suggests an improvement in attention control during the intervention accompanying the reduction in symptoms.

5.
Chemosphere ; 213: 205-214, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30223125

RESUMO

The potential bioavailability of toxic chemicals from oil spills to water column organisms such as fish embryos may be influenced by physical dispersion along an energy gradient. For example, a surface slick with minimal wave action (low energy) could potentially produce different toxic effects from high energy situations such as pressurized discharge from a blown wellhead. Here we directly compared the toxicity of water accommodated fractions (WAFs) of oil prepared with low and high mixing energy (LEWAFs and HEWAFs, respectively) using surface oil samples collected during the 2010 Deepwater Horizon spill, and embryos of a representative nearshore species, red drum (Sciaenops ocellatus). Biological effects of each WAF type was quantified with several functional and morphological indices of developmental cardiotoxicity, providing additional insight into species-specific responses to oil exposure. Although the two WAF preparations yielded different profiles of polycyclic aromatic hydrocarbons (PAHs), cardiotoxic phenotypes were essentially identical. Based on benchmark thresholds for both morphological and functional cardiotoxicity, in general LEWAFs had lower thresholds for these phenotypes than HEWAFs based on total PAH measures. However, HEWAF and LEWAF toxicity thresholds were more similar when calculated based on estimates of dissolved PAHs only. Differences in thresholds were attributable to the weathering state of the oil samples.


Assuntos
Organismos Aquáticos/química , Cardiotoxicidade/etiologia , Petróleo/efeitos adversos , Hidrocarbonetos Policíclicos Aromáticos/química , Poluentes Químicos da Água/química , Água/química , Animais , Peixes , Poluentes Químicos da Água/análise , Tempo (Meteorologia)
6.
Sci Rep ; 5: 17326, 2015 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-26658479

RESUMO

Crude oils from distinct geological sources worldwide are toxic to developing fish hearts. When oil spills occur in fish spawning habitats, natural resource injury assessments often rely on conventional morphometric analyses of heart form and function. The extent to which visible indicators correspond to molecular markers for cardiovascular stress is unknown for pelagic predators from the Gulf of Mexico. Here we exposed mahi (Coryphaena hippurus) embryos to field-collected crude oil samples from the 2010 Deepwater Horizon disaster. We compared visible heart defects (edema, abnormal looping, reduced contractility) to changes in expression of cardiac-specific genes that are diagnostic of heart failure in humans or associated with loss-of-function zebrafish cardiac mutants. Mahi exposed to crude oil during embryogenesis displayed typical symptoms of cardiogenic syndrome as larvae. Contractility, looping, and circulatory defects were evident, but larval mahi did not exhibit downstream craniofacial and body axis abnormalities. A gradation of oil exposures yielded concentration-responsive changes in morphometric and molecular responses, with relative sensitivity being influenced by age. Our findings suggest that 1) morphometric analyses of cardiac function are more sensitive to proximal effects of crude oil-derived chemicals on the developing heart, and 2) molecular indicators reveal a longer-term adverse shift in cardiogenesis trajectory.


Assuntos
Embrião não Mamífero/efeitos dos fármacos , Coração/efeitos dos fármacos , Perciformes , Poluição por Petróleo , Petróleo/toxicidade , Animais , Biomarcadores , Cardiotoxicidade/genética , Embrião não Mamífero/metabolismo , Exposição Ambiental , Perfilação da Expressão Gênica , Perciformes/embriologia , Perciformes/genética , Reprodutibilidade dos Testes , Fatores de Tempo
7.
Sci Rep ; 5: 13499, 2015 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-26345607

RESUMO

The 1989 Exxon Valdez disaster exposed embryos of pink salmon and Pacific herring to crude oil in shoreline spawning habitats throughout Prince William Sound, Alaska. The herring fishery collapsed four years later. The role of the spill, if any, in this decline remains one of the most controversial unanswered questions in modern natural resource injury assessment. Crude oil disrupts excitation-contraction coupling in fish heart muscle cells, and we show here that salmon and herring exposed as embryos to trace levels of crude oil grow into juveniles with abnormal hearts and reduced cardiorespiratory function, the latter a key determinant of individual survival and population recruitment. Oil exposure during cardiogenesis led to specific defects in the outflow tract and compact myocardium, and a hypertrophic response in spongy myocardium, evident in juveniles 7 to 9 months after exposure. The thresholds for developmental cardiotoxicity were remarkably low, suggesting the scale of the Exxon Valdez impact in shoreline spawning habitats was much greater than previously appreciated. Moreover, an irreversible loss of cardiac fitness and consequent increases in delayed mortality in oil-exposed cohorts may have been important contributors to the delayed decline of pink salmon and herring stocks in Prince William Sound.


Assuntos
Exposição Ambiental/efeitos adversos , Peixes , Cardiopatias Congênitas/etiologia , Petróleo/efeitos adversos , Salmão , Alaska , Animais , Cardiotoxicidade , Miocárdio/metabolismo , Miocárdio/patologia
8.
J Psychiatr Res ; 63: 117-22, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25765144

RESUMO

Inhalation of 7.5% carbon dioxide increases anxiety and autonomic arousal and provides a novel experimental model of anxiety with which to evaluate pharmacological and psychological treatments for anxiety. To date several psychotropic drugs including benzodiazepines, SSRIs and SNRIs have been evaluated using the 7.5% CO2 model; however, it has yet to be used to evaluate psychological interventions. We compared the effects of two core psychological components of mindfulness-meditation (open monitoring and focused attention) against general relaxation, on subjective, autonomic and neuropsychological outcomes in the 7.5% CO2 experimental model. 32 healthy screened adults were randomized to complete 10 min of guided open monitoring, focused attention or relaxation, immediately before inhaling 7.5% CO2 for 20 min. During CO2-challenge participants completed an eye-tracking measure of attention control and selective attention. Measures of subjective anxiety, blood pressure and heart rate were taken at baseline and immediately following intervention and CO2-challenge. OM and FA practice reduced subjective feelings of anxiety during 20-min inhalation of 7.5% CO2 compared to relaxation control. OM practice produced a strong anxiolytic effect, whereas the effect of FA was more modest. Anxiolytic OM and FA effects occurred in the absence of group differences in autonomic arousal and eye-movement measures of attention. Our findings are consistent with neuropsychological models of mindfulness-meditation that propose OM and FA activate prefrontal mechanisms that support emotion regulation during periods of anxiety and physiological hyper-arousal. Our findings complement those from pharmacological treatment studies, further supporting the use of CO2 challenge to evaluate future therapeutic interventions for anxiety.


Assuntos
Ansiedade/reabilitação , Meditação/métodos , Atenção Plena/métodos , Administração por Inalação , Adulto , Análise de Variância , Ansiedade/etiologia , Ansiedade/psicologia , Pressão Sanguínea/fisiologia , Dióxido de Carbono/efeitos adversos , Feminino , Frequência Cardíaca/fisiologia , Humanos , Masculino , Resultado do Tratamento , Adulto Jovem
9.
Hum Psychopharmacol ; 30(2): 66-9, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25619161

RESUMO

OBJECTIVE: Lithium treatment remains an important part of the management of many patients with bipolar disorder, but the incidence of treatment-emergent sexual dysfunction with lithium is uncertain, and little is known about how it might be managed. METHOD: Systematic computerised literature search of preclinical and clinical studies. RESULTS: Thirteen relevant papers were identified. Preclinical studies suggest lithium can reduce testosterone levels and impair nitric oxide mediated relaxation of cavernosal tissue. Clinical reports suggest lithium may reduce sexual thoughts and desire, worsen erectile function and reduce sexual satisfaction. Concomitant benzodiazepine prescription with lithium is associated with an increased risk of sexual dysfunction. Sexual dysfunction during lithium treatment appears significantly associated with a lower level of overall functioning and may reduce compliance. CONCLUSION: The findings of this systematic review reveal the paucity of information about the incidence, associated factors and management of sexual dysfunction with lithium treatment and highlight the need for well-designed studies in this area.


Assuntos
Antidepressivos/efeitos adversos , Lítio/efeitos adversos , Disfunções Sexuais Fisiológicas/induzido quimicamente , Animais , Transtorno Bipolar/tratamento farmacológico , Ensaios Clínicos como Assunto/estatística & dados numéricos , Avaliação Pré-Clínica de Medicamentos/estatística & dados numéricos , Humanos , PubMed/estatística & dados numéricos
10.
Health Technol Assess ; 18(50): 1-59, v-vi, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25110830

RESUMO

BACKGROUND: Anxiety and related disorders include generalised anxiety disorder, obsessive-compulsive disorder, panic disorder, post-traumatic stress disorder and phobic disorders (intense fear of an object or situation). These disorders share the psychological and physical symptoms of anxiety, but each disorder has its own set of characteristic symptoms. Anxiety disorders can be difficult to recognise, particularly in older people (those aged over 65 years). Older people tend to be more reluctant to discuss mental health issues and there is the perception that older people are generally more worried than younger adults. It is estimated that between 3 and 14 out of every 100 older people have an anxiety disorder. Despite treatment, some people will continue to have symptoms of anxiety. People are generally considered to be 'resistant' or 'refractory' to treatment if they have an inadequate response or do not respond to their first treatment. Older adults with an anxiety disorder find it difficult to manage their day-to-day lives and are at an increased risk of comorbid depression, falls, physical and functional disability, and loneliness. OBJECTIVE: To evaluate the effectiveness of pharmacological, psychological and alternative therapies in older adults with an anxiety disorder who have not responded, or have responded inadequately, to treatment. DATA SOURCES: Electronic databases (MEDLINE, MEDLINE In-Process and Other Non-Indexed citations, EMBASE, The Cochrane Library databases, PsycINFO and Web of Science) were searched from inception to September 2013. Bibliographies of relevant systematic reviews were hand-searched to identify additional potentially relevant studies. ClinicalTrials.gov was searched for ongoing and planned studies. REVIEW METHODS: A systematic review of the clinical effectiveness of treatments for treatment-resistant anxiety in older adults was carried out. RESULTS: No randomised controlled trial or prospective comparative observational study was identified meeting the prespecified inclusion criteria. Therefore, it was not possible to draw any conclusions on clinical effectiveness. LIMITATIONS: As no study was identified in older adults, there is uncertainty as to which treatments are clinically effective for older adults with an anxiety disorder who have not responded to prior treatment. The comprehensive methods implemented to carry out this review are a key strength of the research presented. However, this review highlights the extreme lack of research in this area, identifying no comparative studies, which is a marked limitation. CONCLUSIONS: Specific studies evaluating interventions in older adults with an anxiety disorder who have not responded to first-line treatment are needed to address the lack of evidence. The lack of evidence in this area means that older adults are perhaps receiving inappropriate treatment or are not receiving a particular treatment because there is limited evidence to support its use. At this time there is scope to develop guidance on service provision and, as a consequence, to advance the standard of care received by older adults with a treatment-resistant anxiety disorder in primary and secondary care. Evaluation of the relative clinical effectiveness and acceptability of pharmacological and psychological treatment in older adults with an anxiety disorder that has not responded to first-line treatment is key future research to inform decision-making of clinicians and patients. An important consideration would be the enrolment of older adults who would be representative of older adults in general, i.e. those with multiple comorbid physical and mental disorders who might require polypharmacy. STUDY REGISTRATION: The protocol for the systematic review is registered on PROSPERO (registration number CRD42013005612). FUNDING: The National Institute for Health Research Health Technology Assessment programme.


Assuntos
Ansiedade/terapia , Fatores Etários , Idoso , Ansiolíticos/uso terapêutico , Ansiedade/tratamento farmacológico , Humanos , Psicoterapia , Falha de Tratamento , Resultado do Tratamento
11.
Nephrol Nurs J ; 40(5): 437-42; quiz 443, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24308110

RESUMO

UNLABELLED: The objective of this single-arm interventional pilot study was to determine whether viewing an educational video about phosphorous and phosphorous control by patients on hemodialysis was associated with improved phosphorous values and improvement in knowledge and attitudes about the topics presented. METHOD: An educational video was shown to 150 patients at 16 dialysis centers. The change in serum phosphate levels before and after the viewing of an educational video was evaluated. RESULTS: Mean phosphorous levels for patients were lower in the month after viewing the educational video compared to their values over the three months before the video was shown (6.35 versus 6.82 g/dL). This difference was statistically significant on a per patient basis (-0.47 g/dL, p = 0.0006). Of these patients, all with phosphorus levels outside of the normal range (3.5 to 5.5 mg/dL) before viewing the video, 28.4% had phosphorus levels within the normal range within a month after viewing the video. CONCLUSION: Patients on hemodialysis who watched an educational video had improved phosphorous levels in the month after viewing the video when compared to phosphorus levels over the three months before the video was shown. The video intervention has the advantages of being simple, low-cost, and easy to implement, and is associated with improved phosphorous levels in patients undergoing hemodialysis. The video increased patient compliance with recommended self-care regimens.


Assuntos
Educação Continuada em Enfermagem/métodos , Educação de Pacientes como Assunto/métodos , Fósforo/sangue , Diálise Renal/efeitos adversos , Gravação de Videoteipe , Humanos , Falência Renal Crônica/sangue , Falência Renal Crônica/terapia , Projetos Piloto
12.
Psychiatry Res ; 210(3): 1226-31, 2013 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-24135553

RESUMO

Mindfulness meditation techniques are increasingly popular both as a life-style choice and therapeutic adjunct for a range of mental and physical health conditions. However, little is known about the mechanisms through which mindfulness meditation and its constituent practices might produce positive change in cognition and emotion. Our study directly compared the effects of Focused Attention (FA) and Open-Monitoring (OM) meditation on alerting, orienting and executive attention network function in healthy individuals. Participants were randomized to three intervention groups: open-focused meditation, focused attention, and relaxation control. Participants completed an emotional variant of the Attention Network Test (ANT) at baseline and post-intervention. OM and FA practice improved executive attention, with no change observed in the relaxation control group. Improvements in executive attention occurred in the absence of change in subjective/self-report mood and cognitive function. Baseline levels of dispositional/trait mindfulness were positively correlated with executive control in the ANT at baseline. Our results suggest that mindfulness meditation might usefully target deficits in executive attention that characterise mood and anxiety disorders.


Assuntos
Atenção , Cognição , Função Executiva/fisiologia , Meditação/métodos , Relaxamento , Adulto , Afeto , Transtornos de Ansiedade/terapia , Emoções , Feminino , Voluntários Saudáveis , Humanos , Masculino , Pessoa de Meia-Idade , Atenção Plena
13.
Neurosci Biobehav Rev ; 37(8): 1549-66, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23792048

RESUMO

The symptoms we identify and the behaviors we recognize as defenses define which symptoms we see as trauma-related. Early conceptions of trauma-related disorders focused on physical signs of distress while current ones emphasize mental symptoms, but traumatizing experiences evoke psychobiological reactions. An evolutionary perspective presumes that psychophysical reactions to traumatizing events evolved to ensure survival. This theoretical review examines several primitive mechanisms (e.g., sensitization and dissolution) associated with responses to diverse stressors, from danger to life-threat. Some rapidly acquired symptoms form without conscious awareness because severe stresses can dysregulate mental and physical components within systems ensuring survival. Varied defensive options engage specialized and enduring psychophysical reactions; this allows for more adaptive responses to diverse threats. Thus, parasympathetically mediated defense states such as freeze or collapse increase trauma-related symptom variability. Comorbidity and symptom variability confuse those expecting mental rather than psychophysical responses to trauma, and active (sympathetically mediated flight and fight) rather than immobility defenses. Healthcare implications for stress research, clinical practice and diagnostic nosology stem from the broader evolutionary view.


Assuntos
Adaptação Fisiológica/fisiologia , Adaptação Psicológica/fisiologia , Evolução Biológica , Medo/fisiologia , Transtornos de Estresse Pós-Traumáticos/etiologia , Medo/psicologia , Humanos , Transtornos de Estresse Pós-Traumáticos/psicologia
14.
Plant Cell ; 25(1): 270-87, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23371948

RESUMO

Plant cell walls are comprised largely of the polysaccharides cellulose, hemicellulose, and pectin, along with ∼10% protein and up to 40% lignin. These wall polymers interact covalently and noncovalently to form the functional cell wall. Characterized cross-links in the wall include covalent linkages between wall glycoprotein extensins between rhamnogalacturonan II monomer domains and between polysaccharides and lignin phenolic residues. Here, we show that two isoforms of a purified Arabidopsis thaliana arabinogalactan protein (AGP) encoded by hydroxyproline-rich glycoprotein family protein gene At3g45230 are covalently attached to wall matrix hemicellulosic and pectic polysaccharides, with rhamnogalacturonan I (RG I)/homogalacturonan linked to the rhamnosyl residue in the arabinogalactan (AG) of the AGP and with arabinoxylan attached to either a rhamnosyl residue in the RG I domain or directly to an arabinosyl residue in the AG glycan domain. The existence of this wall structure, named ARABINOXYLAN PECTIN ARABINOGALACTAN PROTEIN1 (APAP1), is contrary to prevailing cell wall models that depict separate protein, pectin, and hemicellulose polysaccharide networks. The modified sugar composition and increased extractability of pectin and xylan immunoreactive epitopes in apap1 mutant aerial biomass support a role for the APAP1 proteoglycan in plant wall architecture and function.


Assuntos
Arabidopsis/química , Parede Celular/química , Mucoproteínas/química , Pectinas/química , Proteoglicanas/química , Xilanos/química , Sequência de Aminoácidos , Anticorpos Monoclonais/imunologia , Arabidopsis/genética , Arabidopsis/metabolismo , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/isolamento & purificação , Proteínas de Arabidopsis/metabolismo , Biomassa , Parede Celular/genética , Parede Celular/metabolismo , Epitopos , Glicoproteínas/genética , Glicoproteínas/isolamento & purificação , Glicoproteínas/metabolismo , Modelos Estruturais , Dados de Sequência Molecular , Mucoproteínas/genética , Mucoproteínas/imunologia , Mucoproteínas/metabolismo , Mutação , Pectinas/metabolismo , Proteínas de Plantas/química , Proteínas de Plantas/genética , Proteínas de Plantas/imunologia , Proteínas de Plantas/metabolismo , Polissacarídeos/química , Polissacarídeos/metabolismo , Isoformas de Proteínas , Proteoglicanas/metabolismo , Proteômica , Xilanos/metabolismo
15.
Artigo em Inglês | MEDLINE | ID: mdl-25225018

RESUMO

In the translation of psychoneuroimmunology research into clinical practice, one critical step is to identify biomarkers for improved diagnosis and targeting of interventions. Inflammatory markers deserve special attention due to their crucial role linking various health conditions and disorders. In this chapter, we discuss the pivotal roles of cytokines in signalling to the brain and leading to behavioural changes. This is followed by a review of recent research findings into neuroimmunology of depression, and immunomodulating effects of antidepressants. The rest of the chapter focuses on neuroinflammatory hypothesis in anxiety disorders, and provides an overview of current research evidence on inflammatory responses in anxious state and anxiety disorders. Research suggestions are recommended, including study design, risk factors, medication effects, and measurement strategies. Clinical and pharmacotherapeutic implications and future research directions are also discussed in the final section.


Assuntos
Antidepressivos/uso terapêutico , Transtornos de Ansiedade/imunologia , Transtornos de Ansiedade/terapia , Fatores Imunológicos/uso terapêutico , Neuroimunomodulação , Animais , Transtornos de Ansiedade/diagnóstico , Citocininas/metabolismo , Humanos
16.
Hum Psychopharmacol ; 27(1): 6-14, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22213434

RESUMO

OBJECTIVE: Research into psychoneuroimmunology has led to substantial advances in our understanding of the reciprocal interactions between the central nervous system and the immune system in neuropsychiatric disorders. To date, the presence of inflammatory responses and the crucial role of cytokines in major depression have been addressed in numerous studies. However, neuroinflammatory hypotheses in anxiety disorders have been studied less extensively than in major depression. There is a high research need for better understanding of both the heterogeneous role of specific cytokines in the control of anxious states and in different anxiety disorders and of the immunomodulating effects of antidepressants on anxiety. METHODS: Relevant literature was identified through a search of MEDLINE via PubMed. We discuss recent research on neuroimmunology in anxiety and make methodological recommendations for future investigation of neuroinflammatory hypotheses in anxiety disorders. RESULTS: Some accumulating evidence has indicated modulatory effects of cytokines on neuronal communication and anxiety; however, research has not revealed consistent reproducible findings. CONCLUSIONS: The availability of inflammatory biomarkers may provide an opportunity to identify patients via specific pathophysiological processes and to monitor therapeutic responses within relevant pathways. Further understanding of the neuroimmunological mechanisms to untangle the reciprocal associations between inflammation and anxiety is warranted.


Assuntos
Transtornos de Ansiedade/imunologia , Inflamação/imunologia , Neuroimunomodulação/imunologia , Animais , Antidepressivos/farmacologia , Transtornos de Ansiedade/tratamento farmacológico , Transtornos de Ansiedade/fisiopatologia , Comunicação Celular , Citocinas/imunologia , Humanos , Inflamação/fisiopatologia , Neurônios/metabolismo
17.
Proc Natl Acad Sci U S A ; 108(17): 7086-90, 2011 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-21482755

RESUMO

Exposure to high concentrations of crude oil produces a lethal syndrome of heart failure in fish embryos. Mortality is caused by cardiotoxic polycyclic aromatic hydrocarbons (PAHs), ubiquitous components of petroleum. Here, we show that transient embryonic exposure to very low concentrations of oil causes toxicity that is sublethal, delayed, and not counteracted by the protective effects of cytochrome P450 induction. Nearly a year after embryonic oil exposure, adult zebrafish showed subtle changes in heart shape and a significant reduction in swimming performance, indicative of reduced cardiac output. These delayed physiological impacts on cardiovascular performance at later life stages provide a potential mechanism linking reduced individual survival to population-level ecosystem responses of fish species to chronic, low-level oil pollution.


Assuntos
Sistema Enzimático do Citocromo P-450/biossíntese , Ecossistema , Doenças dos Peixes , Insuficiência Cardíaca , Miocárdio , Petróleo/toxicidade , Hidrocarbonetos Policíclicos Aromáticos/toxicidade , Poluentes Químicos da Água/toxicidade , Peixe-Zebra/metabolismo , Animais , Feminino , Doenças dos Peixes/induzido quimicamente , Doenças dos Peixes/enzimologia , Doenças dos Peixes/patologia , Insuficiência Cardíaca/induzido quimicamente , Insuficiência Cardíaca/enzimologia , Insuficiência Cardíaca/patologia , Insuficiência Cardíaca/veterinária , Masculino , Miocárdio/enzimologia , Miocárdio/patologia , Proteínas de Peixe-Zebra/biossíntese
18.
Psychiatry Res ; 186(1): 150-2, 2011 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-20833435

RESUMO

Potentiation of fear-related defense behaviours coordinated by the amygdala in response to environmental threat characterizes several anxiety disorders. We compared eye-blink startle responses to startle probes delivered during the presentation of emotional and neutral social cues in high and low generalized social anxiety. Socially anxious individuals exhibited larger startle responses to emotional (positive and negative) relative to neutral social cues, compared to non-anxious individuals.


Assuntos
Ansiedade/fisiopatologia , Piscadela/fisiologia , Sinais (Psicologia) , Mecanismos de Defesa , Emoções/fisiologia , Estimulação Acústica/métodos , Análise de Variância , Ansiedade/psicologia , Eletromiografia/métodos , Humanos , Estimulação Luminosa/métodos , Escalas de Graduação Psiquiátrica , Estatística como Assunto , Inquéritos e Questionários , Fatores de Tempo
19.
Neuropsychiatr Dis Treat ; 6: 269-71, 2010 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-20520790

RESUMO

PURPOSE: Akathisia remains a common side effect especially from antipsychotic medication. If the condition is diagnosed the management options are limited. SUBJECTS/METHODOLOGY: We tested a structured relaxation program on nine patients with a diagnosis of schizophrenia suffering from akathisia. All patients were rated on Barnes Akathisia Scale (BAS) before the relaxation program, immediately after and again one week later. RESULTS: The mean BAS score was before the relaxation 3.3 which reduced to 1.4 immediately after to finally 1.0 a week later. A Wilcoxon signed ranks test revealed a significant reduction in BAS score from baseline to endpoint (P = 0.026; Z = -2.232) and a highly significant reduction from baseline to follow-up (P = 0.008; Z = -2.636). DISCUSSION: Although the study has a number of limitations the relaxation program appears to be a promising alternative to traditional treatment of akathisia. The patients appreciated the relaxation session but none of them managed to carry it out on their own without professional encouragement. The findings in this case series warrant further investigation with larger numbers of patients.

20.
Expert Opin Drug Saf ; 3(5): 457-70, 2004 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-15335301

RESUMO

The term 'sexual dysfunction' describes a disturbance in sexual desire and the psychophysiological changes that characterise the normal sexual response cycle, and cause marked personal distress and interpersonal difficulty. Epidemiological studies indicate that sexual dysfunction is common in the general population, but more common in depressed individuals in community settings and clinical samples. Most antidepressant drugs have adverse effects on sexual function, but accurate identification of the incidence of treatment-emergent dysfunction has proved troublesome. Futhermore, investigations of sexual dysfunction associated with antidepressants have one or more methodological flaws. There may be some advantages for bupropion, moclobemide, nefazodone and reboxetine over other antidepressants. Many approaches have been adopted for management of patients with sexual dysfunction associated with antidepressant treatment, including waiting for the problem to resolve, behavioural strategies to modify sexual technique, individual and couple psychotherapy, delaying the intake of antidepressants until after sexual activity, reduction in daily dosage, 'drug holidays', use of adjuvant treatments, and switching to a different antidepressant.


Assuntos
Antidepressivos/efeitos adversos , Disfunções Sexuais Fisiológicas/induzido quimicamente , Adolescente , Adulto , Antidepressivos/administração & dosagem , Antidepressivos/farmacologia , Estudos de Casos e Controles , Estudos Cross-Over , Depressão/complicações , Depressão/tratamento farmacológico , Depressão/psicologia , Transtorno Depressivo/complicações , Transtorno Depressivo/tratamento farmacológico , Transtorno Depressivo/psicologia , Método Duplo-Cego , Esquema de Medicação , Ejaculação/efeitos dos fármacos , Disfunção Erétil/induzido quimicamente , Disfunção Erétil/tratamento farmacológico , Feminino , Humanos , Libido/efeitos dos fármacos , Masculino , Orgasmo/efeitos dos fármacos , Fitoterapia , Prevalência , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Comportamento Sexual/efeitos dos fármacos , Disfunções Sexuais Fisiológicas/tratamento farmacológico , Disfunções Sexuais Fisiológicas/etiologia , Disfunções Sexuais Fisiológicas/terapia
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