{"id":104786,"date":"2018-01-19T15:00:31","date_gmt":"2018-01-19T14:00:31","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=104786"},"modified":"2018-01-19T14:44:36","modified_gmt":"2018-01-19T13:44:36","slug":"test-sanguin-permet-de-depister-cancer-meme-apparition","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/test-sanguin-permet-de-depister-cancer-meme-apparition\/","title":{"rendered":"Un test sanguin permet de d\u00e9pister le cancer avant m\u00eame son apparition !"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-104793\" src=\"https:\/\/www.realites.com.tn\/wp-content\/uploads\/2018\/01\/test-sanguin.jpg\" alt=\"test-sanguin\" width=\"502\" height=\"335\" srcset=\"https:\/\/realites.com.tn\/fr\/wp-content\/uploads\/2018\/01\/test-sanguin.jpg 502w, https:\/\/realites.com.tn\/fr\/wp-content\/uploads\/2018\/01\/test-sanguin-300x200.jpg 300w\" sizes=\"(max-width: 502px) 100vw, 502px\" \/><\/p>\n<p>Un test sanguin exp\u00e9rimental a permis de\u00a0d\u00e9tecter de fa\u00e7on pr\u00e9coce les huit cancers les plus fr\u00e9quents\u00a0dans 70% des cas en moyenne, donnant l\u2019espoir de d\u00e9pister cette maladie avant m\u00eame l\u2019apparition de sympt\u00f4mes et d\u2019am\u00e9liorer ainsi les chances de gu\u00e9rison.<br \/>\nL\u2019\u00e9tude,\u00a0mise en ligne jeudi\u00a0dans le Magazine<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"http:\/\/www.sciencemag.org\/news\/2018\/01\/liquid-biopsy-promises-early-detection-cancer\" target=\"_blank\" rel=\"nofollow\">\u00a0Science<\/a><\/span>, a port\u00e9 sur plus d\u2019un millier de patients dont la tumeur ne s\u2019\u00e9tait pas encore propag\u00e9e. Ces r\u00e9sultats pourraient placer l\u2019\u00e9quipe de chercheurs de l\u2019Universit\u00e9 Johns Hopkins \u00e0 Baltimore (Maryland), men\u00e9e par Nickolas Papadopoulos, Bert Vogelstein et d&rsquo;autres, en t\u00eate dans la comp\u00e9tition en cours pour commercialiser un test sanguin universel de d\u00e9pistage du cancer.<br \/>\nIls ont\u00a0entam\u00e9 une autre \u00e9tude qui pourrait porter pendant cinq ans sur 50\u00a0000 femmes \u00e2g\u00e9es de 65 \u00e0 75 ans n\u2019ayant jamais eu un cancer, pour d\u00e9terminer si ce test peut\u00a0d\u00e9tecter plus syst\u00e9matiquement la pr\u00e9sence d\u2019une tumeur sans aucun sympt\u00f4me. Les mutations g\u00e9n\u00e9tiques provoquent la croissance de cellules canc\u00e9reuses, dont l\u2019ADN se retrouve dans le sang.<br \/>\nDans les \u00e9chantillons de sang des 1 005 patients\u00a0\u00e9tudi\u00e9s atteints d\u2019un des huit types de cancer les plus communs n\u2019ayant pas encore fait de m\u00e9tastases, le taux de d\u00e9tection a vari\u00e9 de 33% \u00e0 98% selon les tumeurs, pr\u00e9cisent les auteurs.\u00a0La sensibilit\u00e9 a \u00e9t\u00e9 de 69% et plus\u00a0pour les cancer de l\u2019ovaire, du foie, de l\u2019estomac, du pancr\u00e9as et de l\u2019\u0153sophage qui sont tous difficiles \u00e0 d\u00e9tecter pr\u00e9cocement, ont-ils pr\u00e9cis\u00e9.<br \/>\nCe test a rarement trouv\u00e9 un cancer qui n\u2019existait pas avec seulement sept fausses d\u00e9tections sur 812 r\u00e9elles, soit moins d\u2019un pour cent dans le groupe t\u00e9moin de personnes en bonne sant\u00e9, soulignent-ils. Ce test, appel\u00e9 \u00ab\u00a0CancerSEEK\u00a0\u00bb, a aussi pu\u00a0r\u00e9duire \u00e0 deux sites possibles l\u2019origine du cancer dans environ 80% des patients. L\u2019\u00e9quipe de recherche a d\u00e9j\u00e0 d\u00e9pos\u00e9 un brevet pour CancerSEEK dont le co\u00fbt sera inf\u00e9rieur \u00e0 500 dollars.<br \/>\n\u00ab\u00a0<em>Ce montant est excellent<\/em>\u00a0\u00bb car il est comparable \u00e0 ceux d\u2019autres tests actuels de d\u00e9tection du cancer comme la coloscopie, juge Anirban Maitra, un canc\u00e9rologue du Centre du cancer Anderson \u00e0 Houston au Texas. Il pointe n\u00e9anmoins des probl\u00e8mes potentiels comme les prot\u00e9ines li\u00e9es aux diff\u00e9rents cancers utilis\u00e9es dans ce test qui sont des marqueurs de tissus endommag\u00e9s. Ainsi des personnes sans cancer mais souffrant de maladies inflammatoires comme l\u2019arthrite pourraient \u00eatre test\u00e9es faussement positives.<br \/>\nEn outre, \u00ab\u00a0<em>CancerSEEK<\/em>\u00a0\u00bb ne sera probablement pas aussi efficace chez des patients sans sympt\u00f4mes dont les tumeurs plus petites pourraient diffuser moins d\u2019ADN dans le sang, estime Dr Maitra. En fait ce test n\u2019a d\u00e9pist\u00e9 que 43% des cancers tr\u00e8s pr\u00e9coces de stade 1 asymptomatiques, montre l\u2019\u00e9tude.<br \/>\nUn autre probl\u00e8me potentiel pourrait \u00eatre le traitement inutile et risqu\u00e9 de certaines de ces petites tumeurs qui n\u2019\u00e9voluent pas et ne pr\u00e9sentent aucun danger. Pour Papadopoulos, cela ne devrait pas \u00eatre un probl\u00e8me puisque chaque cas est \u00e9valu\u00e9 par une \u00e9quipe m\u00e9dicale. \u00ab\u00a0<em>La question n\u2019est pas le surdiagnostic mais le surtraitement<\/em>\u00ab\u00a0, juge-t-il.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un test sanguin exp\u00e9rimental a permis de\u00a0d\u00e9tecter de fa\u00e7on pr\u00e9coce les huit cancers les plus fr\u00e9quents\u00a0dans 70% des cas en moyenne, donnant l\u2019espoir de d\u00e9pister cette maladie avant m\u00eame l\u2019apparition&hellip;<\/p>\n","protected":false},"author":60,"featured_media":104793,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[27,4,7],"tags":[],"class_list":["post-104786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite","category-actualites","category-monde"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Un test sanguin permet de d\u00e9pister le cancer avant m\u00eame son apparition ! 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