{"id":8243,"date":"2025-07-28T15:56:58","date_gmt":"2025-07-28T13:56:58","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/les-differences-de-sexe-affectent-lefficacite-du-traitement-sur-la-surdose-des-opioides-revele-letude-de-tep-du-corps-entier\/"},"modified":"2025-07-28T15:56:59","modified_gmt":"2025-07-28T13:56:59","slug":"les-differences-de-sexe-affectent-lefficacite-du-traitement-sur-la-surdose-des-opioides-revele-letude-de-tep-du-corps-entier","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/les-differences-de-sexe-affectent-lefficacite-du-traitement-sur-la-surdose-des-opioides-revele-letude-de-tep-du-corps-entier\/","title":{"rendered":"Les diff\u00e9rences de sexe affectent l&rsquo;efficacit\u00e9 du traitement sur la surdose des opio\u00efdes, r\u00e9v\u00e8le l&rsquo;\u00e9tude de TEP du corps entier"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/sex-differences-affect.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2025\/sex-differences-affect.jpg\" data-sub-html=\"Whole-body (11C) carfentanil PET imaging at baseline (left side of panel) and then following naloxone (middle panel) shows \u03bc-opioid receptor (MOR) in the brain (color) and throughout the body. Weight based naloxone administration results in greater MOR occupancy in women than men (top right blue\/red figure showing differences in the thalamus, a brain structure rich in MOR expression). Whole-body imaging imaging permits dynamic measurements in multiple regions, e.g. aorta, skeletal muscle, that could serve as reference regions. Credit: Chia-Ju Hsieh, University of Pennsylvania, Philadelphia, Pennsylvania.\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>La naloxone (\u00e9galement connue sous le nom de Narcan, le m\u00e9dicament couramment utilis\u00e9 pour traiter les surdoses de stup\u00e9fiants) a une plus grande liaison aux r\u00e9cepteurs opio\u00efdes dans le cerveau des femmes que dans le cerveau des hommes, selon de nouvelles recherches publi\u00e9es dans <i>Le Journal of Nuclear Medicine<\/i>.<\/p>\n<p>La premi\u00e8re \u00e9tude de TEP \u00e0 corps entier \u00e0 l&rsquo;humain sugg\u00e8re que les hommes et les femmes peuvent r\u00e9pondre diff\u00e9remment aux traitements des troubles de l&rsquo;utilisation des opio\u00efdes et offre de nouvelles informations pour faire progresser la neuropharmacologie.<\/p>\n<p>L&rsquo;abus d&rsquo;opio\u00efdes est une \u00e9pid\u00e9mie mondiale associ\u00e9e \u00e0 des taux \u00e9lev\u00e9s de surdose et de mortalit\u00e9. Le r\u00e9cepteur \u03bc-opio\u00efde (MOR) est la cible des m\u00e9dicaments opio\u00efdes, y compris le fentanyl et l&rsquo;h\u00e9ro\u00efne, ainsi que la naloxone, un antagoniste opio\u00efde utilis\u00e9 pour traiter le trouble de l&rsquo;utilisation des opio\u00efdes.<\/p>\n<p>Les MOR sont largement exprim\u00e9es dans le syst\u00e8me nerveux central, les organes p\u00e9riph\u00e9riques et le syst\u00e8me immunitaire, ce qui les rend particuli\u00e8rement utiles pour \u00e9valuer les changements fonctionnels chez les personnes atteintes d&rsquo;un trouble d&rsquo;utilisation des opio\u00efdes.<\/p>\n<p>\u00ab\u00a0Une meilleure compr\u00e9hension des interactions des m\u00e9dicaments opio\u00efdes avec le MOR pourrait aider \u00e0 \u00e9lucider l&rsquo;\u00e9tiologie, la pr\u00e9vention et le traitement des troubles de la consommation d&rsquo;opio\u00efdes\u00a0\u00bb, a d\u00e9clar\u00e9 Jacob Dubroff, MD, Ph.D., professeur agr\u00e9g\u00e9 de radiologie dans la division de la m\u00e9decine nucl\u00e9aire et de la th\u00e9rapie \u00e0 Perelman School of Medicine \u00e0 l&rsquo;Universit\u00e9 de Pennsylvanie \u00e0 Philadelphie.<\/p>\n<p>\u00ab\u00a0En utilisant un animal de compagnie \u00e0 corps entier, nous avons \u00e9tudi\u00e9 la physiologie MOR chez les hommes et les femmes avant et apr\u00e8s le pr\u00e9traitement avec la naloxone.\u00a0\u00bb<\/p>\n<p>Six sujets en bonne sant\u00e9 f\u00e9minin et sept hommes ont subi deux <sup>11<\/sup>Sessions d&rsquo;imagerie pour animaux de compagnie du corps en c-carfentanil &#8211; une au d\u00e9part et une imm\u00e9diatement apr\u00e8s le pr\u00e9traitement avec l&rsquo;antagoniste MOR Naloxone.<\/p>\n<p><sup>11<\/sup>Les rapports de volume de distribution du cerveau de C-carfentanil ont \u00e9t\u00e9 d\u00e9termin\u00e9s en utilisant le cortex occipital et le cortex visuel \u00e0 l&rsquo;int\u00e9rieur en tant que r\u00e9gions de r\u00e9f\u00e9rence. Les rapports de volume de distribution des organes p\u00e9riph\u00e9riques ont \u00e9galement \u00e9t\u00e9 mesur\u00e9s \u00e0 l&rsquo;aide de l&rsquo;aorte descendante et des biceps \/ triceps comme r\u00e9gions de r\u00e9f\u00e9rence.<\/p>\n<p>Dans l&rsquo;ensemble, la naloxone a r\u00e9duit la disponibilit\u00e9 MOR de 40 \u00e0 50% dans les r\u00e9gions c\u00e9r\u00e9brales connues pour exprimer des niveaux \u00e9lev\u00e9s de mors; Une plus grande r\u00e9duction a \u00e9t\u00e9 observ\u00e9e chez les femmes par rapport aux hommes. Pour la distribution MOR p\u00e9riph\u00e9rique, la r\u00e9gion de r\u00e9f\u00e9rence de l&rsquo;aorte descendante a montr\u00e9 moins de variance que le muscle extr\u00e9miste, mais les deux ont montr\u00e9 des effets de blocage de la naloxone.<\/p>\n<p>\u00ab\u00a0Cette recherche est importante car elle sugg\u00e8re qu&rsquo;il peut y avoir des diff\u00e9rences sexuelles dans la fa\u00e7on dont les hommes et les femmes r\u00e9agissent aux traitements sur la surdose des opio\u00efdes\u00a0\u00bb, a not\u00e9 Dubroff.<\/p>\n<p>\u00ab\u00a0De plus, nous avons montr\u00e9 comment des r\u00e9gions en dehors du cerveau peuvent \u00eatre utilis\u00e9es pour aider \u00e0 mesurer la liaison des radiotracer dans le cerveau. Cette strat\u00e9gie pourrait \u00eatre appliqu\u00e9e \u00e0 d&rsquo;autres radiotracteurs utilis\u00e9s pour l&rsquo;imagerie c\u00e9r\u00e9brale TEP et stimuler le d\u00e9veloppement de nouveaux.\u00a0\u00bb<\/p>\n<p>\t\t\t\t\t\t\t\t\t\t\t\tFourni par la soci\u00e9t\u00e9 de m\u00e9decine nucl\u00e9aire et d&rsquo;imagerie mol\u00e9culaire<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>La naloxone (\u00e9galement connue sous le nom de Narcan, le m\u00e9dicament couramment utilis\u00e9 pour traiter<\/p>\n","protected":false},"author":1,"featured_media":8244,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[698,2721,16,2611,3657,1137,49,1346,411,157,3489,112,1056,6121,261],"class_list":["post-8243","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-addictions","tag-affectent","tag-corps","tag-des","tag-differences","tag-entier","tag-lefficacite","tag-les","tag-letude","tag-opioides","tag-revele","tag-sexe","tag-sur","tag-surdose","tag-tep","tag-traitement","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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