{"id":2004,"date":"2024-11-09T18:01:48","date_gmt":"2024-11-09T17:01:48","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/nouvel-espoir-pour-linfertilite-masculine-des-chercheurs-decouvrent-un-mecanisme-cle-du-syndrome-de-klinefelter\/"},"modified":"2024-11-09T18:01:49","modified_gmt":"2024-11-09T17:01:49","slug":"nouvel-espoir-pour-linfertilite-masculine-des-chercheurs-decouvrent-un-mecanisme-cle-du-syndrome-de-klinefelter","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/nouvel-espoir-pour-linfertilite-masculine-des-chercheurs-decouvrent-un-mecanisme-cle-du-syndrome-de-klinefelter\/","title":{"rendered":"Nouvel espoir pour l\u2019infertilit\u00e9 masculine : des chercheurs d\u00e9couvrent un m\u00e9canisme cl\u00e9 du syndrome de Klinefelter"},"content":{"rendered":"
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Comment un chromosome X suppl\u00e9mentaire conduit-il \u00e0 l\u2019infertilit\u00e9 chez les hommes ? Le professeur Qiao Jie et son \u00e9quipe du troisi\u00e8me h\u00f4pital de l’universit\u00e9 de P\u00e9kin ont r\u00e9v\u00e9l\u00e9 pourquoi le syndrome de Klinefelter, une maladie g\u00e9n\u00e9tique courante affectant un homme sur 600, conduit souvent \u00e0 l’infertilit\u00e9 – et ils ont identifi\u00e9 un moyen potentiel de le traiter.<\/p>\n

Leur recherche, intitul\u00e9e \u00ab\u00a0Comment le chromosome X suppl\u00e9mentaire alt\u00e8re le d\u00e9veloppement des cellules germinales f\u0153tales m\u00e2les\u00a0\u00bb, publi\u00e9e dans Nature<\/i> fournit de nouvelles informations sur les m\u00e9canismes mol\u00e9culaires en jeu et offre m\u00eame des pistes de traitement potentielles.<\/p>\n

Les hommes atteints du syndrome de Klinefelter ont un chromosome X suppl\u00e9mentaire, ce qui signifie que leur constitution g\u00e9n\u00e9tique est \u00ab 47, XXY \u00bb au lieu de l’habituel \u00ab 46, XY \u00bb. Ils perdent g\u00e9n\u00e9ralement de grandes quantit\u00e9s de cellules reproductrices cl\u00e9s avant la pubert\u00e9. Cela signifie qu\u2019ils produisent tr\u00e8s peu ou pas de spermatozo\u00efdes et, jusqu\u2019\u00e0 pr\u00e9sent, ne disposent d\u2019aucune option de traitement fiable. Alors que certains peuvent encore engendrer des enfants gr\u00e2ce \u00e0 une technologie de reproduction avanc\u00e9e, pr\u00e8s de la moiti\u00e9 ont encore du mal \u00e0 trouver du sperme utilisable.<\/p>\n

L’\u00e9quipe a \u00e9tudi\u00e9 les cellules germinales f\u0153tales (FGC) de patients Klinefelter, qui se d\u00e9veloppent t\u00f4t dans la vie avant de dispara\u00eetre. Ils ont d\u00e9couvert que la pr\u00e9sence du chromosome X suppl\u00e9mentaire fait que les deux chromosomes X restent actifs dans les cellules germinales f\u0153tales, provoquant une surcharge de certains g\u00e8nes. Cette pouss\u00e9e g\u00e9n\u00e9tique perturbe d\u2019importantes voies biologiques et emp\u00eache les cellules de m\u00fbrir correctement.<\/p>\n

De plus, ces cellules ne pouvaient pas se d\u00e9placer vers le bon endroit dans les testicules, ce qui est n\u00e9cessaire pour qu\u2019elles se transforment en cellules matures productrices de spermatozo\u00efdes. En cas d\u2019activit\u00e9 g\u00e9n\u00e9tique anormale et de mouvements perturb\u00e9s, ces cellules sont perdues tr\u00e8s t\u00f4t, bien avant de pouvoir se transformer en spermatozo\u00efdes fonctionnels.<\/p>\n

L\u2019\u00e9quipe a d\u00e9couvert que l\u2019utilisation d\u2019inhibiteurs du TGF-\u03b2 pourrait aider ces cellules germinales f\u0153tales \u00e0 m\u00fbrir normalement, ce qui ouvre la voie \u00e0 des traitements possibles contre l\u2019infertilit\u00e9 chez les hommes atteints du syndrome de Klinefelter.<\/p>\n

Avec cette \u00e9tude, l’\u00e9quipe du professeur Qiao Jie apporte une nouvelle compr\u00e9hension et de l’espoir aux hommes confront\u00e9s \u00e0 l’infertilit\u00e9, en soulignant les contributions significatives du troisi\u00e8me h\u00f4pital de l’Universit\u00e9 de P\u00e9kin \u00e0 l’avancement de la science de la sant\u00e9 reproductive.<\/p>\n

<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Comment un chromosome X suppl\u00e9mentaire conduit-il \u00e0 l\u2019infertilit\u00e9 chez les hommes ? Le professeur Qiao<\/p>\n","protected":false},"author":1,"featured_media":2005,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[288,666,364,16,2361,2364,2362,2363,1256,1760,8,283],"class_list":["post-2004","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-chercheurs","tag-cle","tag-decouvrent","tag-des","tag-espoir","tag-klinefelter","tag-linfertilite","tag-masculine","tag-mecanisme","tag-nouvel","tag-pour","tag-syndrome","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"\nNouvel espoir pour l\u2019infertilit\u00e9 masculine : des chercheurs d\u00e9couvrent un m\u00e9canisme cl\u00e9 du syndrome de Klinefelter - RVH-Synergie.org<\/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:\/\/rvh-synergie.org\/actualites\/nouvel-espoir-pour-linfertilite-masculine-des-chercheurs-decouvrent-un-mecanisme-cle-du-syndrome-de-klinefelter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nouvel espoir pour l\u2019infertilit\u00e9 masculine : des chercheurs d\u00e9couvrent un m\u00e9canisme cl\u00e9 du syndrome de Klinefelter - RVH-Synergie.org\" \/>\n<meta property=\"og:description\" content=\"Comment un chromosome X suppl\u00e9mentaire conduit-il \u00e0 l\u2019infertilit\u00e9 chez les hommes ? 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