{"id":1155,"date":"2016-04-04T17:39:47","date_gmt":"2016-04-04T16:39:47","guid":{"rendered":"http:\/\/www.soshepatites.org\/plateforme\/?post_type=glossary&#038;p=1155"},"modified":"2016-04-04T17:40:46","modified_gmt":"2016-04-04T16:40:46","slug":"plaquettes","status":"publish","type":"glossary","link":"https:\/\/soshepatites.org\/plateforme\/lexique\/plaquettes\/","title":{"rendered":"PLAQUETTES"},"content":{"rendered":"<div class=\"description\"><span style=\"color: #000000;\">Les plaquettes, aussi appel\u00e9es <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/medecine-thrombocyte-835\/\">thrombocytes<\/a>, sont des \u00e9l\u00e9ments retrouv\u00e9s dans la circulation sanguine. Elles sont surtout connues pour leur r\u00f4le dans la <a class=\"xt-\u00adclick\" style=\"color: #000000;\" title=\"Coagulation sanguine : un rayon laser en guise d\u2019interrupteur on-off\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/actu\/d\/medecine-coagulation-sanguine-rayon-laser-guise-interrupteur-on-off-48038\/\">coagulation du sang<\/a>, et s\u2019activent en cas de l\u00e9sion vasculaire afin de stopper une h\u00e9morragie. Il ne s\u2019agit pas de cellules \u00e0 proprement parler, mais de fragments \u00e9nucl\u00e9\u00e9s issus du fractionnement de grosses cellules appel\u00e9es m\u00e9gacaryocytes.<\/span><\/div>\n<div class=\"description\"><\/div>\n<div class=\"description\">\n<p><span style=\"color: #000000;\"><strong>Principal r\u00f4le des plaquettes : <\/strong><\/span><span style=\"color: #000000;\">La principale fonction des <a class=\"xt-\u00adclick\" style=\"color: #000000;\" title=\"En vid\u00e9o : les plaquettes traquent les pathog\u00e8nes dans le sang\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/actu\/d\/medecine-video-plaquettes-traquent-pathogenes-sang-47295\/\">plaquettes<\/a> est de d\u00e9clencher la <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/medecine-coagulation-3160\/\">coagulation<\/a> du sang lors d\u2019une l\u00e9sion vasculaire. La blessure active les thrombocytes qui lib\u00e8rent alors des facteurs de coagulation. S\u2019ensuit une cascade de r\u00e9actions aboutissant \u00e0 la formation d\u2019une <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/biologie-proteine-237\/\">prot\u00e9ine<\/a>, la <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/medecine-fibrine-3367\/\">fibrine<\/a>, qui permet la formation d\u2019un <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/medecine-caillot-12120\/\">caillot<\/a> sur les lieux de la l\u00e9sion, bloquant alors la sortie du <a class=\"xt-\u00adclick\" style=\"color: #000000;\" title=\"Quelle est la composition du sang ?\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/qr\/d\/corps-humain-composition-sang-1995\/\">sang<\/a>. Ce caillot est \u00e9limin\u00e9 une fois la <a class=\"definition glossaire external-link xt-\u00adclick\" style=\"color: #000000;\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dico\/d\/medecine-cicatrisation-3154\/\">cicatrisation<\/a> op\u00e9r\u00e9e.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>Maladies li\u00e9es aux plaquettes sanguines : <\/strong><\/span><span style=\"color: #000000;\">Chez une personne saine, on d\u00e9nombre habituellement entre 150 et 400 milliards de plaquettes par litre de sang. Lorsque la num\u00e9ration est plus basse, on parle de thrombocytop\u00e9nie, souvent associ\u00e9e \u00e0 des <a class=\"xt-\u00adclick\" style=\"color: #000000;\" title=\"AVC : le bon cholest\u00e9rol pour \u00e9viter l\u2019h\u00e9morragie c\u00e9r\u00e9brale\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/actu\/d\/medecine-avc-bon-cholesterol-eviter-hemorragie-cerebrale-44916\/\">risques h\u00e9morragiques<\/a> plus importants. \u00c0 l\u2019inverse, des taux trop \u00e9lev\u00e9s entra\u00eenent une thrombocytose, qui augmente les risques de <a class=\"xt-\u00adclick\" style=\"color: #000000;\" title=\"Dossier Ath\u00e9roscl\u00e9rose : La thrombose\" href=\"http:\/\/www.futura-sciences.com\/magazines\/sante\/infos\/dossiers\/d\/medecine-atherosclerose-maladie-arteres-997\/page\/4\/\">thrombose<\/a>, c\u2019est-\u00e0-dire la formation d\u2019un caillot dans la circulation sanguine qui alt\u00e8re, voire stoppe, le trafic dans certains vaisseaux.<\/span><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les plaquettes, aussi appel\u00e9es thrombocytes, sont des \u00e9l\u00e9ments retrouv\u00e9s dans la circulation sanguine. Elles sont surtout connues pour leur r\u00f4le dans la coagulation du sang, et s\u2019activent en cas de l\u00e9sion vasculaire afin de stopper une h\u00e9morragie. Il ne s\u2019agit pas de cellules \u00e0 proprement parler, mais de fragments \u00e9nucl\u00e9\u00e9s issus du fractionnement de grosses &hellip; <a href=\"https:\/\/soshepatites.org\/plateforme\/lexique\/plaquettes\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">PLAQUETTES<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"template":"","glossary-cat":[],"class_list":["post-1155","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PLAQUETTES - nous sommes H\u00c9PATANTS<\/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:\/\/soshepatites.org\/plateforme\/lexique\/plaquettes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PLAQUETTES - nous sommes H\u00c9PATANTS\" \/>\n<meta property=\"og:description\" content=\"Les plaquettes, aussi appel\u00e9es thrombocytes, sont des \u00e9l\u00e9ments retrouv\u00e9s dans la circulation sanguine. 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