{"id":99729,"date":"2025-08-22T06:48:17","date_gmt":"2025-08-22T06:48:17","guid":{"rendered":"https:\/\/www.mymsd.ch\/fr\/?post_type=product&#038;p=99729"},"modified":"2026-02-20T08:03:39","modified_gmt":"2026-02-20T08:03:39","slug":"mecanisme-daction","status":"publish","type":"product","link":"https:\/\/www.mymsd.ch\/fr\/products\/welireg\/mecanisme-daction\/","title":{"rendered":"M\u00e9canisme d\u2019action"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-28eb0ee67a50ddfc7abc147ee7fa0a23  mhh-mcn-v1-heading mhh-mcn-v1-heading--dd89b9d2d841732056a8bc204fe1f1db\" style=\"color:#123a8a\">Comment agit WELIREG\u00ae?<\/h1>\n\n\n\n<p class=\"has-border-color has-has-red-border-color-border-color   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--d08501f72f056f37b8217ab60d2348a7\">WELIREG\u00ae est un inhibiteur de HIF-2\u03b1 qui agit dans le noyau cellulaire et peut r\u00e9duire la transcription de certains g\u00e8nes cibles qui favorisent la croissance de certaines tumeurs.<sup>1<\/sup><\/p>\n\n\n\n<p class=\"has-border-color has-has-red-border-color-border-color   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--6bc24542438067ace94616119824c459\">En cas de manque d&rsquo;oxyg\u00e8ne, HIF-2\u03b1 active des g\u00e8nes qui favorisent la prolif\u00e9ration cellulaire, l&rsquo;angiogen\u00e8se et la croissance tumorale. Normalement, HIF-2\u03b1 est d\u00e9grad\u00e9 par la prot\u00e9ine VHL. Dans des conditions hypoxiques ou en cas de d\u00e9ficience de la prot\u00e9ine VHL, HIF-2\u03b1 s&rsquo;accumule et se stabilise, migre vers le noyau cellulaire o\u00f9 il interagit avec HIF-1\u03b2 et active ainsi des g\u00e8nes favorisant la croissance. WELIREG\u00ae emp\u00eache l&rsquo;interaction HIF-2\u03b1\/HIF-1\u03b2 et inhibe ainsi l&rsquo;activation de ces g\u00e8nes cibles.<sup>1<\/sup><\/p>\n\n\n\n<p class=\"has-border-color has-has-red-border-color-border-color   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--d8736c3c5cd24ddab7d3fe7a1b2b737e\">WELIREG\u00ae est indiqu\u00e9 pour certaines tumeurs associ\u00e9es \u00e0 la maladie de VHL et pour certains carcinomes \u00e0 cellules r\u00e9nales (CCR) avanc\u00e9s.<sup>1<\/sup><\/p>\n\n\n<div class=\"mhh-mcn-columns mhh-mcn-v1-columns--fc7df30ce98d7d4284bcce516871c93b mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--9d868bac18358936d21b523ac257cec5 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-3 mhh-mcn-column--l-3\">\n    <\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--09a7d9038cc1b6be2f768a9e5d26121e mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-6 mhh-mcn-column--l-6\">\n    \n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n<\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--9d868bac18358936d21b523ac257cec5 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-3 mhh-mcn-column--l-3\">\n    <\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n\n<h2 dir=\"ltr\" lang=\"fr-FR\" class=\"wp-block-heading  has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-6224027983f7b51c8009b32b594ef297 mhh-mcn-v1-heading--center mhh-mcn-v1-heading mhh-mcn-v1-heading--2ccaea924fb5e853f6562d83bbe3b07c\" style=\"color:#123a8a\">WELIREG\u00ae peut bloquer l\u2019interaction du&nbsp;HIF-2\u03b1&nbsp;avec le&nbsp;HIF-1\u03b2, ce qui entra\u00eene une r\u00e9duction de la transcription et de l\u2019expression des g\u00e8nes cibles de&nbsp;HIF-2\u03b1.<sup>1<\/sup><\/h2>\n\n\n<div class=\"mhh-mcn-columns mhh-mcn-v1-columns--fc7df30ce98d7d4284bcce516871c93b mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--9d868bac18358936d21b523ac257cec5 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-3 mhh-mcn-column--l-3\">\n    <\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--09a7d9038cc1b6be2f768a9e5d26121e mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-6 mhh-mcn-column--l-6\">\n    \n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n<\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--9d868bac18358936d21b523ac257cec5 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-3 mhh-mcn-column--l-3\">\n    <\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<figure class=\"mhh-mcn-v1-image mhh-mcn-v1-image--640b39557ea05d9e2a0cc22c110ddabd\">\n                    <img loading=\"lazy\" decoding=\"async\"\n        class=\"mhh-mcn-image mhh-mcn-image--full wp-image-99792\"\n        src=\"https:\/\/www.mymsd.ch\/fr\/wp-content\/uploads\/sites\/30\/2025\/04\/F-WELIREG-MOA.jpg?quality=80&#038;lossy=1\"\n        width=\"1024\"\n        height=\"512\"\n                alt=\"welireg\"\n            \/>\n            <\/figure>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"mhh-mcn-columns mhh-mcn-v1-columns--91a7cd95fd0e4e051b00b9cb0f5b1341 mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--31b002f58ee92f453f188722e82b73c1 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-12 mhh-mcn-column--l-12\">\n    <\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n<div class=\"mhh-mcn-v1-links mhh-mcn-v1-links--1df10307e1925828dedd9c606ec15f4d\">\n    <a class=\"mhh-mcn-v1-link mhh-mcn-v1-link--875692e5cbece2659e5d362f80170231\" href=\"mailto:%20dpoc.switzerland@msd.com\" target=\"_self\" aria-label=\"Des exemplaires des publications de l&#039;\u00e9tude peuvent \u00eatre demand\u00e9s \u00e0 dpoc.switzerland@msd.com si n\u00e9cessaire.\">\n                    <span class=\"mhh-mcn-v1-link__label\">Des exemplaires des publications de l&rsquo;\u00e9tude peuvent \u00eatre demand\u00e9s \u00e0 dpoc.switzerland@msd.com si n\u00e9cessaire.<\/span>\n                <\/a><\/div>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"mhh-mcn-columns mhh-mcn-v1-columns--a6edb63ee4652dec46718eb0499ae16d mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--82c0af93db215057733c932ed06195c4 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-12 mhh-mcn-column--l-12\">\n    \n\n<h5 class=\"wp-block-heading has-border-color has-has-red-border-color-border-color  mhh-mcn-v1-heading mhh-mcn-v1-heading--46aa9e938de25c139c2f5d54954102fa\"><em><strong>Abr\u00e9viations<\/strong>:<\/em><\/h5>\n\n\n\n<p class=\"has-gray-700-color has-text-color has-object-object-font-size has-border-color has-has-red-border-color-border-color   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--cb0ed46024b4afdc065023f8d6b293e6\"><em><mark class=\"has-inline-color has-black-color\"><strong>CCR<\/strong>: carcinome \u00e0 cellules r\u00e9nales; <strong>HIF<\/strong>: facteur induit par l&rsquo;hypoxie (hypoxia-inducible factor); <strong>VHL<\/strong>: Von-Hippel-Lindau.<\/mark><\/em><\/p>\n\n<\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n<div class=\"mhh-mcn-columns mhh-mcn-v1-columns--8faa03b61ca7883e0e6873d7b70d6452 mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--7cc930edb2a20822dbeede45c7670bfd mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-12 mhh-mcn-column--l-12\">\n    \n\n<h5 class=\"wp-block-heading has-border-color has-has-red-border-color-border-color  mhh-mcn-v1-heading mhh-mcn-v1-heading--5b2b20a3ee98fd1d8e6583f4547713c2\"><em><strong>R\u00e9f\u00e9rences:<\/strong> <\/em><\/h5>\n\n\n\n<ol class=\"mhh-mcn-v2-clist mhh-mcn-v2-clist--b5f92f6aa0070f87c8f42ce9cd3f102c mhh-mcn-list mhh-mcn-v2-clist--ordered mhh-mcn-v2-clist--ordered-decimal\" dir=\"ltr\" lang=\"en-US\" start=\"1\">\n    \n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    <em>Information professionnelle de WELIREG\u00ae (Belzutifan)<mark class=\"has-inline-color has-gray-700-color\"><mark class=\"has-inline-color has-gray-700-color\">,\u00a0<a href=\"https:\/\/www.swissmedicinfo.ch\/ShowText.aspx?textType=FI&amp;lang=FR&amp;authNr=68531\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">www.swissmedicinfo.ch<\/a><\/mark><\/mark>, derni\u00e8re consultation le 22.08.2025.<\/em>    <\/li>\n\n<\/ol>\n\n<\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n\n<p class=\"has-object-object-font-size has-border-color has-has-red-border-color-border-color   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--24ad3a5177bf9a4a3573e07b35fd7dd8\">\u25bc <em>Ce m\u00e9dicament fait l&rsquo;objet d&rsquo;une surveillance suppl\u00e9mentaire. Pour plus d\u2019informations, se r\u00e9f\u00e9rer \u00e0 l\u2019information professionnelle de WELIREG\u00ae disponible sous <a href=\"https:\/\/www.swissmedicinfo.ch\/ShowText.aspx?textType=FI&amp;lang=FR&amp;authNr=68531\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">www.swissmedicinfo.ch<\/a>.<\/em><br><br><em>Avant la prescription, veuillez consulter l\u2019information professionnelle compl\u00e8te publi\u00e9e sur&nbsp;<a href=\"https:\/\/www.swissmedicinfo.ch\/ShowText.aspx?textType=FI&amp;lang=FR&amp;authNr=68531\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">www.swissmedicinfo.ch<\/a>.<\/em><\/p>\n\n\n<div class=\"mhh-mcn-v1-links mhh-mcn-v1-links--a4b2e6dd9bc1e5063a3cb4413c58fb90\">\n    <a class=\"mhh-mcn-v1-link mhh-mcn-v1-link--9e8104a6f5eec9849dd3d04c4bebc2f7 mhh-mcn-v1-link--is-variation mhh-mcn-v1-link--button-custom\" href=\"https:\/\/www.swissmedicinfo-pro.ch\/showText.aspx?textType=FI&#038;lang=FR&#038;authNr=68531&#038;supportMultipleResults=1\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Information professionnelle de WELIREG\u00ae\">\n                    <span class=\"mhh-mcn-v1-link__label\">Information professionnelle de WELIREG\u00ae<\/span>\n                <\/a><\/div>\n\n\n<div class=\"mhh-mcn-v1-links mhh-mcn-v1-links--3792025ea97d0a7c9ce392b8bb3d3780\">\n    <a class=\"mhh-mcn-v1-link mhh-mcn-v1-link--fab7de5fa295e2a7924fb0c35177fc95 mhh-mcn-v1-link--is-variation mhh-mcn-v1-link--button-custom\" href=\"https:\/\/www.mymsd.ch\/fr\/succinctstatement\/welireg\/\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Information professionnelle abr\u00e9g\u00e9e de WELIREG\u00ae\">\n                    <span class=\"mhh-mcn-v1-link__label\">Information professionnelle abr\u00e9g\u00e9e de WELIREG\u00ae<\/span>\n                <\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>WELIREG\u00ae &#8211; Un inhibiteur de HIF-2\u03b1<\/p>\n","protected":false},"author":202221,"featured_media":100993,"parent":99715,"menu_order":2,"template":"","meta":{"_mhh_sticky_footer_settings":{"entityId":0},"_mhh_sticky_footer_posts":"","_mhh_sticky_footer_expanded":false,"_mhh_mcn_text_direction":"","_mhh_mcn_language":"","_mhh_mcn_left_sidebar_settings":{"entityId":0},"_mhh_mcn_sidebar_settings":{"entityId":0},"mhh_mcn_side_navigation_style":{"fontSize":{"l":"","m":"","s":""},"lineHeight":{"l":1.5,"m":1.5,"s":1.5},"itemColor":"","hoverItemColor":"","currentItemColor":"","borderItemColor":"","backgroundItemHoverColor":"","themeColor":""},"_mhh_mcn_child_page_navigation":{"isActive":true,"isSticky":true},"hide_header":false,"show_top_bar":false,"hide_footer":false,"full_width_layout":false,"product_resource":[],"related_products":"","fact_sheet":null,"scientific_title":"","job_code":"","banner":100994,"primary_logo":null,"secondary_logo":null,"icon":null,"primary_tag":1524,"editor_notices":[],"mconnectHideShareThis":false,"footnotes":"","mconnectIsArchiveTemplate":false,"mconnectArchiveFiltersDisabled":false,"mconnectArchiveLockAllPresetFilters":false,"mconnectArchiveHidePageSubmenu":false,"mconnectArchiveShowParentPageOnly":false,"mconnectArchiveDefaultOrder":"DESC","mconnectArchiveDefaultOrderBy":"date","mconnectArchivePostsPerPage":12,"mconnectArchivePostTypes":[],"mconnectArchiveAllowFilterBy":["category","tx-content-type","tx-product","tx-pathology","tx-active-ingredient","tx-therapeutic-area"],"mconnectArchiveTaxonomyOrder":[],"mconnectArchiveFilterSorting":["active","is_keyword","is_date"],"mconnectArchiveContentItemStyle":{"showExcerpt":true,"showImage":true,"showIcon":false,"showPrimaryTag":true,"showBorder":false,"showDates":false,"showCta":true,"isCard":false,"hasBackground":false,"showMetadata":true},"mconnectArchiveLayout":{"type":"list","hasFeatured":false},"mconnectDynamicTaxonomyEntities":[],"mconnectArchiveTerms_category":[],"mconnectArchiveAllowTerms_category":[],"mconnectArchiveTerms_tx-content-type":[],"mconnectArchiveAllowTerms_tx-content-type":[],"mconnectArchiveTerms_tx-product":[],"mconnectArchiveAllowTerms_tx-product":[],"mconnectArchiveTerms_tx-pathology":[],"mconnectArchiveAllowTerms_tx-pathology":[],"mconnectArchiveTerms_tx-active-ingredient":[],"mconnectArchiveAllowTerms_tx-active-ingredient":[],"mconnectArchiveTerms_tx-therapeutic-area":[],"mconnectArchiveAllowTerms_tx-therapeutic-area":[],"mconnectArchiveAllowTerms_dynamic-taxonomy":[],"mconnectArchiveLegacyDefaultTermsApplied":false,"mconnectContentUpdatesPerPage":10,"mconnectContentUpdatesViewMoreUrl":"","mconnectContentUpdatesTerms_tx-content-type":[],"mconnectContentUpdatesTerms_tx-product":[],"mconnectContentUpdatesTerms_tx-pathology":[],"mconnectContentUpdatesTerms_tx-active-ingredient":[],"mconnectContentUpdatesTerms_tx-therapeutic-area":[],"sidebar_toogle":0,"sidebar_toogle_notification_warning":true,"sidebar_toogle_notification_alert":true,"content_expiration_sidebar_date":"","content_expiration_sidebar_expired_post_status":"","content_expiration_sidebar_redirection":""},"categories":[],"tags":[1524,1523],"ga4_page_audience":[],"ga4_page_birn_id":[],"ga4_page_branding":[957],"ga4_page_businessunit":[963],"ga4_page_campaign":[],"ga4_page_content_purpose":[],"ga4_page_customer_journey_stage":[],"ga4_page_customer_specialty":[],"ga4_page_experience":[],"ga4_page_indication":[],"ga4_page_material_intent":[1206],"ga4_page_product":[],"ga4_page_region":[],"ga4_page_therapeuticarea":[],"tx-therapeutic-area":[627,931],"tx-product":[1522],"tx-pathology":[930,1525],"tx-content-type":[686],"tx-active-ingredient":[],"access":[],"user_status":[],"user_role":[],"class_list":["post-99729","product","type-product","status-publish","has-post-thumbnail","hentry","tag-welireg-2","tag-welireg"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>M\u00e9canisme d\u2019action - MyMSD.ch FR<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mymsd.ch\/fr\/products\/welireg\/mecanisme-daction\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u00e9canisme d\u2019action - MyMSD.ch FR\" \/>\n<meta property=\"og:description\" content=\"WELIREG\u00ae - Un inhibiteur de HIF-2\u03b1\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mymsd.ch\/fr\/products\/welireg\/mecanisme-daction\/\" \/>\n<meta property=\"og:site_name\" content=\"MyMSD.ch FR\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-20T08:03:39+00:00\" \/>\n<meta property=\"og:image\" 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