{"id":962,"date":"2026-03-12T17:26:40","date_gmt":"2026-03-12T16:26:40","guid":{"rendered":"https:\/\/biotechlerncenter.iph-multisite.berta-bewegt.ch\/?page_id=962"},"modified":"2026-03-13T18:36:34","modified_gmt":"2026-03-13T17:36:34","slug":"4-comment-agit-lherceptin-contre-le-cancer-du-sein","status":"publish","type":"page","link":"https:\/\/biotechlerncenter.interpharma.ch\/fr\/sujets\/anticorps\/4-comment-agit-lherceptin-contre-le-cancer-du-sein\/","title":{"rendered":"4. Comment agit l&rsquo;herceptin contre le cancer du sein?"},"content":{"rendered":"\n<p>Il existe de nos jours des m\u00e9dicaments efficaces contre les mutations se produisant dans le g\u00e8ne HER2. HER2 est l&rsquo;abr\u00e9viation anglaise de \u00abhuman epidermal receptor 2\u00bb, et signifie facteur de croissance pour l&rsquo;\u00e9piderme humain. La prot\u00e9ine HER2 joue le r\u00f4le de \u00abstation d&rsquo;accostage\u00bb du facteur de croissance et participe ainsi \u00e0 la r\u00e9gulation de la croissance cellulaire (cf. sch\u00e9ma: comment agit l&rsquo;herceptin?). Il n&rsquo;y a en principe que peu d&rsquo;\u00e9l\u00e9ments HER2 sur la surface cellulaire des cellules saines. Pourtant, plus d&rsquo;un quart des patientes atteintes de cancer du sein produisent cette prot\u00e9ine en grande quantit\u00e9. Elles ont un d\u00e9faut g\u00e9n\u00e9tique qui conduit \u00e0 produire \u00e0 foison des prot\u00e9ines HER2. Lorsqu&rsquo;une cellule poss\u00e8de trop de prot\u00e9ines HER2, celle-ci va se diviser fr\u00e9quemment et la tumeur va s&rsquo;accro\u00eetre rapidement et de fa\u00e7on incontr\u00f4l\u00e9e. Les patientes HER2 positif vont ainsi souffrir d&rsquo;une forme particuli\u00e8rement maligne du cancer du sein.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/biotechlerncenter.interpharma.ch\/wp-content\/uploads\/sites\/4\/2020\/01\/brustkrebszellen_900.jpg\" alt=\"\" class=\"wp-image-3383\"\/><figcaption>Cellules tumorales du sein cultiv\u00e9es en une seule couche de cellules \u00e9pith\u00e9liales (culture selon Monolayer).<\/figcaption><\/figure>\n\n\n\n<p>L&rsquo;herceptin, l&rsquo;anticorps monoclonal agissant contre HER2, reconnait la prot\u00e9ine HER2 \u00e0 la surface des cellules tumorales. Elle se fixe sur les cellules canc\u00e9reuses et stoppe le m\u00e9canisme n\u00e9cessaire \u00e0 leur prolif\u00e9ration. L&rsquo;avantage de ce traitement est de ne pas avoir d&rsquo;effet secondaire important; leur fr\u00e9quence est plus \u00e9lev\u00e9e lors de chimioth\u00e9rapie ou de radioth\u00e9rapie.<\/p>\n\n\n\n<p>Un test effectu\u00e9 avant le d\u00e9but d&rsquo;un traitement par herceptin va pouvoir d\u00e9terminer si la patiente poss\u00e8de r\u00e9ellement le d\u00e9faut g\u00e9n\u00e9tique HER2 ou non. On va s&rsquo;assurer ainsi que seules les patientes pouvant effectivement b\u00e9n\u00e9ficier du m\u00e9dicament le re\u00e7oivent. De cette mani\u00e8re, on \u00e9vite des traitements et des co\u00fbts inutiles.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/biotechlerncenter.interpharma.ch\/wp-content\/uploads\/sites\/4\/2020\/01\/herceptin_poster_3.jpg\" alt=\"\" class=\"wp-image-3386\"\/><figcaption>Comment fonctionne l&rsquo;herceptin? Le m\u00e9canisme d&rsquo;action de l&rsquo;herceptin est repr\u00e9sent\u00e9 \u00e0 gauche. Herceptin = Anti-HER2 Monoclonal Antibody.<br>\u00a9 Genentech<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Il existe de nos jours des m\u00e9dicaments efficaces contre les mutations se produisant dans le g\u00e8ne HER2. HER2 est l&rsquo;abr\u00e9viation anglaise de \u00abhuman epidermal receptor 2\u00bb, et signifie facteur de croissance pour l&rsquo;\u00e9piderme humain. La prot\u00e9ine HER2 joue le r\u00f4le de \u00abstation d&rsquo;accostage\u00bb du facteur de croissance et participe ainsi \u00e0 la r\u00e9gulation de la [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":982,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"page-templates\/unterthema.php","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-962","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>4. 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La prot\u00e9ine HER2 joue le r\u00f4le de \u00abstation d&rsquo;accostage\u00bb du facteur de croissance et participe ainsi \u00e0 la r\u00e9gulation de la [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/biotechlerncenter.interpharma.ch\/themen\/monoklonale-antikoerper\/4-wie-wirkt-herceptin-gegen-brustkrebs\/\" \/>\n<meta property=\"og:site_name\" content=\"biotechlerncenter\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-13T17:36:34+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/biotechlerncenter.interpharma.ch\/wp-content\/uploads\/sites\/4\/2020\/01\/brustkrebszellen_900.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/biotechlerncenter.interpharma.ch\/themen\/monoklonale-antikoerper\/4-wie-wirkt-herceptin-gegen-brustkrebs\/\",\"url\":\"https:\/\/biotechlerncenter.interpharma.ch\/themen\/monoklonale-antikoerper\/4-wie-wirkt-herceptin-gegen-brustkrebs\/\",\"name\":\"4. 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