{"id":8615,"date":"2025-08-14T06:56:41","date_gmt":"2025-08-14T04:56:41","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/les-oestrogenes-bloquent-la-ferroptose-fournissant-un-apercu-des-differences-sexuelles-dans-le-risque-de-maladie-renale\/"},"modified":"2025-08-14T06:56:44","modified_gmt":"2025-08-14T04:56:44","slug":"les-oestrogenes-bloquent-la-ferroptose-fournissant-un-apercu-des-differences-sexuelles-dans-le-risque-de-maladie-renale","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/les-oestrogenes-bloquent-la-ferroptose-fournissant-un-apercu-des-differences-sexuelles-dans-le-risque-de-maladie-renale\/","title":{"rendered":"Les \u0153strog\u00e8nes bloquent la ferroptose, fournissant un aper\u00e7u des diff\u00e9rences sexuelles dans le risque de maladie r\u00e9nale"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/estrogens-protect-agai.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/estrogens-protect-agai.jpg\" data-sub-html=\"Female mice are resistant to AKI and renal tubular ferroptosis propagation. Credit: &lt;i&gt;Nature&lt;\/i&gt; (2025). DOI:10.1038\/s41586-025-09389-x\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Les l\u00e9sions r\u00e9nales aigu\u00ebs surviennent fr\u00e9quemment et repr\u00e9sentent toujours un d\u00e9fi clinique majeur en raison de l&rsquo;absence d&rsquo;une th\u00e9rapie cibl\u00e9e.<\/p>\n<p>Pendant des d\u00e9cennies, les cliniciens ont observ\u00e9 que les femmes sont moins sensibles \u00e0 l&rsquo;insuffisance r\u00e9nale aigu\u00eb que les hommes. Ce n&rsquo;est pas une nouvelle d\u00e9couverte; En fait, cela a \u00e9t\u00e9 signal\u00e9 d\u00e8s 1940 et a \u00e9t\u00e9 confirm\u00e9 dans des \u00e9tudes \u00e9pid\u00e9miologiques. Cependant, \u00e0 ce jour, la cause sous-jacente de cet effet reste un myst\u00e8re.<\/p>\n<p>Dans un article publi\u00e9 dans <i>Nature<\/i>les scientifiques de la facult\u00e9 m\u00e9dicale Mannheim, Uidelberg University, ont maintenant fourni une explication cl\u00e9 et nouvelle pour ce ph\u00e9nom\u00e8ne.<\/p>\n<p>Dans l&rsquo;\u00e9tude, ils se sont concentr\u00e9s sur l&rsquo;hormone sexuelle f\u00e9minine \u0153strog\u00e8ne et le processus de ferroptose, une forme d\u00e9pendante du fer de la mort cellulaire r\u00e9gul\u00e9e. Ils ont d\u00e9couvert que les \u0153strog\u00e8nes bloquent la ferroptose, expliquant comment l&rsquo;effet protecteur sur les reins est perdu avec la m\u00e9nopause lorsque la production d&rsquo;hormones sexuelles diminue. Fait int\u00e9ressant, les \u0153strog\u00e8nes et sp\u00e9cifiquement ses d\u00e9riv\u00e9s hydroxyl\u00e9s &#8211; tels que le 2-hydroxyestradiol &#8211; sont des m\u00e9diateurs cl\u00e9s d&rsquo;un m\u00e9canisme de protection complexe \u00e0 travers des m\u00e9canismes g\u00e9nomiques et non g\u00e9nomiques.<\/p>\n<p>Remarquablement, l&rsquo;\u0153strog\u00e8ne agit comme un m\u00e9dicament protecteur intrins\u00e8que contre la ferroptose en soi. De plus, en se liant \u00e0 son r\u00e9cepteur, l&rsquo;\u0153strog\u00e8ne initie divers syst\u00e8mes biologiques qui peuvent \u00eatre consid\u00e9r\u00e9s comme des m\u00e9canismes de d\u00e9fense contre la ferroptose, y compris la r\u00e9gulation des hydroph\u00e8res, qui agissent comme des charognards radicaux pour garder la ferroptose en contr\u00f4le. L&rsquo;engagement des r\u00e9cepteurs des \u0153strog\u00e8nes contrecarre en outre l&rsquo;alt\u00e9ration des lipides \u00e9ther &#8211; les composants importants de la membrane cellulaire &#8211; inhibant \u00e9galement la ferroptose.<\/p>\n<p>Ces observations sont des r\u00e9sultats cl\u00e9s pour expliquer les diff\u00e9rences de risques r\u00e9naux observ\u00e9s entre les hommes et les femmes, et sont des points de d\u00e9part int\u00e9ressants pour de nouvelles approches th\u00e9rapeutiques. Mais il y a plus que cela: la ferroptose joue \u00e9galement un r\u00f4le cl\u00e9 dans de nombreuses maladies diff\u00e9rentes.<\/p>\n<p>\u00ab\u00a0Nos r\u00e9sultats peuvent \u00e9galement avoir des implications bien au-del\u00e0 du rein, m\u00eame pour la recherche sur le cancer. Ces r\u00e9sultats am\u00e8nent la ferroptose au centre des diff\u00e9rences entre les sexes pour des conditions telles que les crises cardiaques et les accidents vasculaires c\u00e9r\u00e9braux \u00e0 partir desquels les femmes ont tendance \u00e0 \u00eatre plus prot\u00e9g\u00e9es que les hommes, et m\u00eame la plus longue esp\u00e9rance de vie des femmes\u00a0\u00bb, explique le professeur Andreas Linkermann, directeur de la 5e clinique m\u00e9dicale de l&rsquo;Universit\u00e9 Medical Mannheim et dernier auteur de la publication.<\/p>\n<p>Les implications potentielles de ce travail pour d&rsquo;autres maladies et dans d&rsquo;autres contextes sont difficiles \u00e0 \u00e9valuer \u00e0 ce stade. Les probl\u00e8mes \u00e9thiques peuvent \u00e9galement devoir \u00eatre pris en compte. Par exemple, dans le contexte de la m\u00e9decine de transplantation, la question pourrait se poser de savoir si les organes de femelles &#8211; avant la m\u00e9nopause &#8211; sont \u00ab\u00a0plus pr\u00e9cieux\u00a0\u00bb que ceux des donneurs masculins, car ils sont moins sensibles au processus chirurgical du transfert d&rsquo;organes.<\/p>\n<p>\u00ab\u00a0L&rsquo;importance de la ferroptose ouvre en fait un tout nouveau domaine de recherche\u00a0\u00bb, conclut Andreas Linkermann.<\/p>\n<p>Tom Vanden Berghe, un expert mondial dans ce domaine, a \u00e9galement reconnu les grandes implications des r\u00e9sultats des n\u00e9phrologues et des scientifiques bas\u00e9s \u00e0 Mannheim, menant des recherches \u00e0 l&rsquo;Universit\u00e9 de Heidelberg.<\/p>\n<p>Dans l&rsquo;article \u00ab\u00a0News and Views\u00a0\u00bb de Vanden Berghe, publi\u00e9 dans le m\u00eame num\u00e9ro de <i>Nature<\/i> Sous le titre \u00ab\u00a0Les \u0153strog\u00e8nes se d\u00e9fendent contre les dommages r\u00e9naux caus\u00e9s par la mort cellulaire d\u00e9pendante du fer\u00a0\u00bb, \u00e9crit-il, \u00ab\u00a0ce travail repr\u00e9sente une \u00e9tape importante dans notre compr\u00e9hension des diff\u00e9rences sexuelles dans l&rsquo;insuffisance r\u00e9nale aigu\u00eb et \u00e9largit la pertinence physiologique de la ferroptose au-del\u00e0 du cancer et de la neurod\u00e9g\u00e9n\u00e9rescence.<\/p>\n<p>\u00ab\u00a0Surtout, ces r\u00e9sultats peuvent aider \u00e0 expliquer l&rsquo;augmentation de la vuln\u00e9rabilit\u00e9 aux l\u00e9sions r\u00e9nales aigu\u00ebs chez les femmes m\u00e9nopaus\u00e9es et \u00e0 fournir une base rationnelle pour explorer les m\u00e9tabolites \u0153strog\u00e9niques ou les inhibiteurs de ferroptose en tant qu&rsquo;agents th\u00e9rapeutiques. Alors que la ferroptose gagne une traction en tant que m\u00e9canisme unificateur de la l\u00e9sion des tissus.\u00a0\u00bb<\/p>\n<p>\t\t\t\t\t\t\t\t\t\t\t\tFourni par Universit\u00e4tsmedizin Mannheim<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les l\u00e9sions r\u00e9nales aigu\u00ebs surviennent fr\u00e9quemment et repr\u00e9sentent toujours un d\u00e9fi clinique majeur en raison<\/p>\n","protected":false},"author":1,"featured_media":8616,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[2875,6302,44,16,2611,5870,5267,49,248,885,249,40,3115],"class_list":["post-8615","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-apercu","tag-bloquent","tag-dans","tag-des","tag-differences","tag-ferroptose","tag-fournissant","tag-les","tag-maladie","tag-oestrogenes","tag-renale","tag-risque","tag-sexuelles","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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