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- W2000928635 abstract "Des anomalies du développement sont identifiées comme facteurs de risque de devenir schizophrénique ultérieur : petit poids de naissance, malformations congénitales, retards des acquisitions motrices ou sociales. Les déficits cognitifs et les signes neurologiques mineurs font partie des indices du spectre schizophrénique. Les études de neuro-imagerie ont signalé diverses anomalies structurelles présentes dès l’éclosion de la pathologie schizophrénique. Ces changements structuraux pourraient témoigner d’une accentuation du processus neurodéveloppemental normal. Par ailleurs, les gènes de susceptibilité de la schizophrénie sont impliqués à différentes étapes du neurodéveloppement : les associations les mieux établies sont des variantes dysfonctionnelles des gènes DISC-1 et Neuregulin-1, le rôle d’autres gènes du neurodéveloppement (dysbindin, BDNF, reelin…) étant moins certain. Enfin, le constat d’anomalies structurales chromosomiques chez 15 % des patients atteints de schizophrénie (versus 5 % en population contrôle), plus fréquentes encore dans les formes de schizophrénie à début précoce (32 % des cas) oriente vers l’hypothèse d’un trouble neurodéveloppemental. Une telle compréhension dynamique du trouble schizophrénique est en cohérence avec la connaissance des phénomènes de plasticité cérébrale tout au long de la vie. Cela n’exclut pas la recherche d’indicateurs de mécanismes de neurodégénérescence. L’enjeu est désormais une meilleure caractérisation du phénotype vulnérable afin de savoir le dépister avant l’éclosion de la maladie. Developmental anomalies have been identified as risk factors for a future schizophrenic illness: low weight at birth, congenital malformations, delayed motor and social learning. Cognitive deficits and neurological soft signs belong to the indices of the schizophrenic spectrum. Neuroimaging has visualized various structural abnormalities present from the very beginning of schizophrenia. These structural changes may represent an exacerbation of normal neurodevelopmental processes. Moreover, vulnerability genes for schizophrenia are involved at different stages of neurodevelopment: the best studied associations are dysfunctional variants of DISC-1 and neuroregulin-1 genes, the role of other genes (dysbindin, BDNF, reelin…) remaining more widely debated. Lastly, the observation of structural chromosomal anomalies in 15% of patients suffering from schizophrenia (versus 5% of controls), more frequent in early onset schizophrenia (32% of cases) suggests a neurodevelopmental cause. Such a dynamic understanding of schizophrenia is consistent with what we know about cerebral plasticity along the life span. This does not preclude the search for cues of degenerative mechanisms. The issue now is a better characterization of the vulnerable phenotype for screening procedures to be implemented prior to disease onset." @default.
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- W2000928635 date "2009-07-01" @default.
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- W2000928635 title "Les schizophrénies, maladies du neurodéveloppement" @default.
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- W2000928635 doi "https://doi.org/10.1016/j.pharma.2009.02.009" @default.
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