{"id":1371,"date":"2024-10-17T12:00:13","date_gmt":"2024-10-17T10:00:13","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/limagerie-cerebrale-de-la-neuromelanine-pourrait-etre-essentielle-pour-comprendre-la-consommation-intensive-de-substances\/"},"modified":"2024-10-17T12:00:14","modified_gmt":"2024-10-17T10:00:14","slug":"limagerie-cerebrale-de-la-neuromelanine-pourrait-etre-essentielle-pour-comprendre-la-consommation-intensive-de-substances","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/limagerie-cerebrale-de-la-neuromelanine-pourrait-etre-essentielle-pour-comprendre-la-consommation-intensive-de-substances\/","title":{"rendered":"L\u2019imagerie c\u00e9r\u00e9brale de la neurom\u00e9lanine pourrait \u00eatre essentielle pour comprendre la consommation intensive de substances"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2024\/brain-imaging-of-neuro.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2024\/brain-imaging-of-neuro.jpg\" data-sub-html=\"Each dot in this graph represents one 20-to 24-year-old woman. The study revealed that generally women with more substance use history (higher score on the X axis) exhibited greater levels of neuromelanin-sensitive MRI (Y axis). Credit: Greg Perlman\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Une \u00e9tude utilisant un type sp\u00e9cialis\u00e9 d&rsquo;imagerie par r\u00e9sonance magn\u00e9tique (IRM) &#8211; IRM sensible \u00e0 la neurom\u00e9lanine &#8211; a montr\u00e9 que ce type de signal IRM \u00e9tait augment\u00e9 dans les r\u00e9gions du m\u00e9senc\u00e9phale chez les jeunes adultes \u00e2g\u00e9s de 20 \u00e0 24 ans qui avaient une consommation importante d&rsquo;alcool et ant\u00e9c\u00e9dents de consommation de drogues.<\/p>\n<p>La recherche a \u00e9t\u00e9 men\u00e9e par une \u00e9quipe de chercheurs du D\u00e9partement de psychiatrie et de sant\u00e9 comportementale de la Renaissance School of Medicine de l\u2019Universit\u00e9 Stony Brook. Les r\u00e9sultats sont publi\u00e9s dans le <i>Journal am\u00e9ricain de psychiatrie<\/i>.<\/p>\n<p>La recherche a port\u00e9 sur 135 personnes, 105 femmes et 30 hommes. La neurom\u00e9lanine s&rsquo;accumule naturellement dans les zones du m\u00e9senc\u00e9phale o\u00f9 est produite la dopamine, un neurotransmetteur. La dopamine joue un r\u00f4le important dans de nombreuses fonctions cognitives et corporelles et joue un r\u00f4le central dans le syst\u00e8me de r\u00e9compense\/motivation du cerveau. La dopamine peut \u00eatre difficile \u00e0 \u00e9tudier chez les jeunes. Cela a entrav\u00e9 la compr\u00e9hension des chercheurs sur les premiers stades de certaines maladies neurologiques et probl\u00e8mes de sant\u00e9 mentale, tels que les comportements addictifs apparaissant \u00e0 l&rsquo;adolescence. Cependant, l\u2019accumulation de neurom\u00e9lanine chez les jeunes peut \u00eatre \u00e9tudi\u00e9e facilement et en toute s\u00e9curit\u00e9 \u00e0 l\u2019aide d\u2019une IRM sensible \u00e0 la neurom\u00e9lanine.<\/p>\n<p>\u00ab\u00a0Les jeunes adultes qui consomment r\u00e9guli\u00e8rement des substances semblent pr\u00e9senter des niveaux d&rsquo;accumulation de neurom\u00e9lanine sup\u00e9rieurs \u00e0 la normale sur ce type d&rsquo;IRM, en particulier les jeunes femmes\u00a0\u00bb, explique Greg Perlman, Ph.D., professeur adjoint de psychiatrie et de sant\u00e9 comportementale et auteur principal. .<\/p>\n<p>\u00ab\u00a0C&rsquo;est important parce qu&rsquo;une grande partie de la recherche biom\u00e9dicale sur les effets de la consommation de drogues et d&rsquo;alcool sur le syst\u00e8me dopaminergique a examin\u00e9 les personnes \u00e2g\u00e9es apr\u00e8s des ann\u00e9es ou des d\u00e9cennies de consommation chronique de substances. En revanche, il existe tr\u00e8s peu d&rsquo;informations sur le syst\u00e8me dopaminergique chez les adolescents ou les adolescents. les populations de jeunes adultes apr\u00e8s seulement quelques ann\u00e9es de consommation habituelle d&rsquo;alcool et de drogues. Le potentiel de l&rsquo;IRM sensible \u00e0 la neurom\u00e9lanine \u00e0 fournir de nouvelles informations sur la sant\u00e9 du syst\u00e8me dopaminergique chez les jeunes \u00e9tait une motivation cl\u00e9 pour notre \u00e9tude.<\/p>\n<p>Perlman a indiqu\u00e9 que l&rsquo;association entre la consommation de substances et les signaux d&rsquo;IRM de la neurom\u00e9lanine \u00e9tait particuli\u00e8rement forte dans certaines r\u00e9gions du m\u00e9senc\u00e9phale des jeunes femmes, comme la zone tegmentale ventrale. De plus, l\u2019augmentation de la neurom\u00e9lanine \u00e9tait associ\u00e9e \u00e0 la consommation de substances en g\u00e9n\u00e9ral, mais pas \u00e0 la consommation d\u2019un type de drogue.<\/p>\n<p>L\u2019\u00e9quipe de recherche m\u00e8ne actuellement une nouvelle \u00e9tude utilisant l\u2019IRM sensible \u00e0 la neurom\u00e9lanine chez des adolescents \u00e2g\u00e9s de 14 \u00e0 17 ans pour mieux comprendre l\u2019accumulation de neurom\u00e9lanine au cours de ces trois ann\u00e9es de vie. L&rsquo;\u00e9tude utilisera des IRM annuelles pour \u00e9valuer l&rsquo;effet des exp\u00e9riences de vie rapport\u00e9es par les adolescents, telles que la consommation d&rsquo;alcool, l&rsquo;utilisation des m\u00e9dias sociaux et les \u00e9v\u00e9nements stressants, sur l&rsquo;accumulation de neurom\u00e9lanine mesur\u00e9e par IRM sensible \u00e0 la neurom\u00e9lanine.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Une \u00e9tude utilisant un type sp\u00e9cialis\u00e9 d&rsquo;imagerie par r\u00e9sonance magn\u00e9tique (IRM) &#8211; IRM sensible \u00e0<\/p>\n","protected":false},"author":1,"featured_media":1372,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[1736,310,33,1738,204,1739,1735,1737,8,203,741],"class_list":["post-1371","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-addictions","tag-cerebrale","tag-comprendre","tag-consommation","tag-essentielle","tag-etre","tag-intensive","tag-limagerie","tag-neuromelanine","tag-pour","tag-pourrait","tag-substances","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - 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