26 research outputs found

    The continuity of effect of schizophrenia polygenic risk score and patterns of cannabis use on transdiagnostic symptom dimensions at first-episode psychosis: findings from the EU-GEI study

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    Abstract: Diagnostic categories do not completely reflect the heterogeneous expression of psychosis. Using data from the EU-GEI study, we evaluated the impact of schizophrenia polygenic risk score (SZ-PRS) and patterns of cannabis use on the transdiagnostic expression of psychosis. We analysed first-episode psychosis patients (FEP) and controls, generating transdiagnostic dimensions of psychotic symptoms and experiences using item response bi-factor modelling. Linear regression was used to test the associations between these dimensions and SZ-PRS, as well as the combined effect of SZ-PRS and cannabis use on the dimensions of positive psychotic symptoms and experiences. We found associations between SZ-PRS and (1) both negative (B = 0.18; 95%CI 0.03–0.33) and positive (B = 0.19; 95%CI 0.03–0.35) symptom dimensions in 617 FEP patients, regardless of their categorical diagnosis; and (2) all the psychotic experience dimensions in 979 controls. We did not observe associations between SZ-PRS and the general and affective dimensions in FEP. Daily and current cannabis use were associated with the positive dimensions in FEP (B = 0.31; 95%CI 0.11–0.52) and in controls (B = 0.26; 95%CI 0.06–0.46), over and above SZ-PRS. We provide evidence that genetic liability to schizophrenia and cannabis use map onto transdiagnostic symptom dimensions, supporting the validity and utility of the dimensional representation of psychosis. In our sample, genetic liability to schizophrenia correlated with more severe psychosis presentation, and cannabis use conferred risk to positive symptomatology beyond the genetic risk. Our findings support the hypothesis that psychotic experiences in the general population have similar genetic substrates as clinical disorders

    Effet thymique aigu de la stimulation cérébrale profonde sous-thalamique chez les patients parkinsoniens

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    Notre travail a pour but d'Ă©tudier l'effet thymique aigu de la stimulation cĂ©rĂ©brale sous-thalamique chez les patients parkinsoniens. Les Ă©chelles utilisĂ©es sont l'Ă©chelle de mĂ©lancolie et de manie de Bech et Rafaelsen, l'Ă©chelle de manie de Beigel et Murphy et la MAThyS (multidimensionnal assessment of thymic states). Un repĂ©rage des contacts par reconstruction IRM 3D a Ă©tĂ© rĂ©alisĂ© pour 10 patients opĂ©rĂ©s. Les mesures sont rĂ©alisĂ©es au cours des tests Ă  la L-Dopa, 1 heure aprĂšs l'arrĂȘt puis la mise en route de la stimulation, Ă  jeun de traitement dopaminergique. ParallĂšlement, une population de patients candidats Ă  l'intervention sont Ă©valuĂ©s lors de leur bilan prĂ©opĂ©ratoire, Ă  jeun de traitement dopaminergique puis Ă  1 heure de la prise mĂ©dicamenteuse. L'Ă©tude de cet Ă©chantillon a pour but de comparer l'effet thymique aigu du sevrage dopaminergique Ă  celui de la stimulation. L'Ă©tude de 14 patients stimulĂ©s montre une amĂ©lioration globale de l'humeur indĂ©pendante de l'efficacitĂ© motrice. Les dimensions concernĂ©es sont l'aspect affectif dĂ©pressif et la motivation. Les Ă©valuations de 6 patients en pĂ©riode prĂ©opĂ©ratoire montre une amĂ©lioration de l'humeur minime affectant seulement la dimension affective dĂ©pressive. L'influence de l'existence d'antĂ©cĂ©dents thymique sur le vĂ©cu des troubles moteurs est illustrĂ©e par l'analyse des rĂ©sultats. D'autre part, il existe une grande variabilitĂ© individuelle sur certaines dimensions (Ă©motionnelle en particulier). La localisation des contacts pourrait expliquer cette hĂ©tĂ©rogĂ©nĂ©itĂ© mais reste difficile Ă  prĂ©ciser. L'Ă©tude constitue une voie vers d'autres projets centrĂ©s sur les patients caractĂ©risĂ©s comme ayant des troubles thymiques consĂ©cutifs Ă  la stimulation ou sur une localisation. L'association Ă  des tests neuropsychologiques permettraient de prĂ©ciser les fonctions impliquĂ©es dans ces dĂ©rĂšglements de l'humeur.CLERMONT FD-BCIU-SantĂ© (631132104) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

    Daniel Pontoreau

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    French survey on the crossed needs on sexual health for chronic inflammatory rheumatism patients and healthcare professionals.

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    International audiencePatients with Inflammatory Chronic Rheumatic disease have approximately three times more sexual dysfunction than the healthy population. However, health professionals do not dare to discuss the subject with them, largely because they do not feel educated on the subject. To define the educational needs in the sexual health of health professionals involved in patient education and those of patients with Inflammatory Chronic Rheumatic disease. This French multicenter cross-sectional online study included health professionals involved in patient education and patients with Inflammatory Chronic Rheumatic disease. Two surveys were designed to assess, both of them the specific needs. They were filled out anonymously online with a secured server. The influence of professionals and patients' characteristics on their sexual health needs were tested. 57 health professionals and 239 patients answered. 71,6% of the patients reported sexual difficulties and 79,9% had never discussed them with health professionals. To facilitate discussion, the health professionals most often wanted a colleague specialized in sexual health in their team (59,7%) and access to tools (52,6%). The patients' primary expectations were psychological support (65.7%), information (51.9%), and referral to specialists if needed (43.1%). The topics the health professionals and patients considered most useful were adverse effects of treatment and impact of rheumatism on sexuality and body image. 70,2% of the health professionals felt they needed training. This survey demonstrates the need to offer educational training to health professionals designed to enable them to address and discuss sexual health issues and give their patients appropriate advice

    Impact of positive emotion regulation training on negative symptoms and social functioning in schizophrenia ::a field test

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    International audienceBackground: The poor efficacy of drug or psychological treatments on the primary negative symptoms of schizophrenia has led to the development of new interventions. The Positive Emotions Program for Schizophrenia (PEPS) is an emotion regulation strategy training that aims to intensify positive emotions and develop positive performance beliefs. A randomized controlled trial showed that PEPS is effective in reducing the composite score of the reduction of experience syndrome (anhedonia and apathy). The present study is designed to evaluate its feasibility in natural conditions to measure external validity of PEPS. Materials and Methods: Twenty-one participants recruited through the French national network of expert centers followed eight sessions of PEPS and were assessed pre- and posttest with the Scale for Assessment of Negative Symptoms (SANS) and the Personal and Social Performance (PSP). The scales of the SANS were divided into a composite score of the reduction of the ability to experience and a composite score of the reduction of expression. Results: All participants followed the 8 sessions of PEPS, and both composite scores were significantly and clinically improved at posttest. Social functioning assessed with the PSP was also improved. Conclusions: This field test shows that participation in PEPS is accompanied by a reduction of negative symptoms and an improvement of social functioning. Both negative syndromes, reduction of expression and reduction of experience, are improved. Participants are younger than those in previous studies, which may explain this unexpected result. However, this calls for a controlled study with younger participants

    Psychiatric disability as mediator of the neurocognition-functioning link in schizophrenia spectrum disorders: SEM analysis using the Evaluation of Cognitive Processes involved in Disability in Schizophrenia (ECPDS) scale

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    International audienceThe functional outcome in schizophrenia spectrum disorders is affected by multiple factors such as cognitive performance and clinical symptoms. Psychiatric disability may be another important determinant of functional outcome. The purpose of this study was to test whether schizophrenia symptoms and psychiatric disability mediated the association between cognition and functioning. Between April 2013 and July 2017, we included 108 community-dwelling adults with stable schizophrenia spectrum disorder in a multicenter study. Psychiatric disability was assessed with the Evaluation of Cognitive Processes involved in Disability in Schizophrenia (ECPDS) scale by relatives of patients. ECPDS focused on the broad array of motivational, neurocognitive, sociocognitive, and metacognitive impairments that result in activity restrictions. We used a battery of tests to assess seven cognition domains (processing speed, attention/vigilance, working, verbal and visual memory, reasoning and problem solving, and executive functioning) and cross-sectional structural equation modeling (SEM) for the mediation analyses. We estimated the one-year temporal stability of ECPDS scores in 45 participants. The model provided showed good fit and explained 43.9% of the variance in functioning. The effect of neurocognition on functioning was fully mediated by symptoms (proportion mediated: 36.5%) and psychiatric disability (proportion mediated: 31.3%). The ECPDS score had acceptable one-year temporal stability. The ECPDS scale has satisfactory psychometric properties, and shows significant convergence with neurocognition and functioning, suggesting a role for this tool in the routine evaluation of cognitive remediation needs. Our model validates psychiatric disability as a crucial step from cognitive impairment to restricted participation in life situations
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