{"id":57374,"date":"2019-01-31T10:42:22","date_gmt":"2019-01-31T10:42:22","guid":{"rendered":"https:\/\/www.humanitas.net\/?post_type=disease&#038;p=57374"},"modified":"2019-01-31T10:42:57","modified_gmt":"2019-01-31T10:42:57","slug":"proteine-c-reactive","status":"publish","type":"disease","link":"https:\/\/www.humanitas.net\/fr\/diseases\/proteine-c-reactive\/","title":{"rendered":"Prot\u00e9ine C r\u00e9active"},"content":{"rendered":"<h2><strong>Qu\u2019est-ce que la prot\u00e9ine C r\u00e9active\u00a0?<\/strong><\/h2>\n<p>Les prot\u00e9ines C r\u00e9actives (PCR) sont l\u2019une des prot\u00e9ines plasmatiques appel\u00e9es prot\u00e9ines de phase aigu\u00eb. Il s\u2019agit de prot\u00e9ines dans lesquelles les concentrations plasmatiques augmentent ou diminuent de 25\u00a0% ou plus lors de troubles inflammatoires. La prot\u00e9ine C r\u00e9active est une glycoprot\u00e9ine qui est normalement pr\u00e9sente dans le sang, elle est produite par le foie en r\u00e9ponse \u00e0 des processus inflammatoires (puis lib\u00e9r\u00e9e par le foie), comme une infection, un traumatisme, une blessure, une chirurgie, des br\u00fblures et un cancer avanc\u00e9. La prot\u00e9ine C r\u00e9active dispara\u00eet de l\u2019organisme lorsqu\u2019il surmonte la phase aigu\u00eb de l\u2019inflammation. Des changements mod\u00e9r\u00e9s de la prot\u00e9ine C r\u00e9active apparaissent dans l\u2019organisme apr\u00e8s un exc\u00e8s, un accouchement et un coup de chaleur. Cependant, de petits changements se produisent apr\u00e8s un stress psychologique et dans plusieurs maladies psychiatriques.<\/p>\n<p>La prot\u00e9ine C r\u00e9active est un signe d\u2019inflammation dans les parois des art\u00e8res. Des \u00e9tudes montrent que la r\u00e9duction de l\u2019inflammation en abaissant les taux de PCR \u00e0 l\u2019aide d\u2019une classe de m\u00e9dicaments appel\u00e9s statines r\u00e9duit consid\u00e9rablement le taux de crises cardiaques et de maladies coronariennes chez les personnes atteintes d\u2019une maladie cardiaque aigu\u00eb. Les patients pr\u00e9sentant des niveaux mod\u00e9r\u00e9s ou \u00e9lev\u00e9s de PCR peuvent habituellement r\u00e9duire les niveaux de PCR en modifiant leur mode de vie, par exemple en cessant de fumer, en faisant de l\u2019exercice r\u00e9guli\u00e8rement, en adoptant une alimentation saine, en prenant une multivitamine chaque jour, en rempla\u00e7ant les gras satur\u00e9s comme le beurre par des gras mono-insatur\u00e9s (particuli\u00e8rement l\u2019huile d\u2019olive), en augmentant leur apport en acides gras om\u00e9ga-3 et en perte de poids si elles font un surplus de poids, en augmentant leur consommation de fibres.<\/p>\n<h2><strong>Pourquoi mesurer le taux de prot\u00e9ine C r\u00e9active\u00a0?<\/strong><\/h2>\n<p>Mesurer les niveaux de prot\u00e9ine C r\u00e9active chez un patient permettra l\u2019apparition de signes d\u2019indicateurs importants d\u2019inflammation, car la prot\u00e9ine PCR est la premi\u00e8re \u00e0 augmenter \u00e0 la suite d\u2019un processus inflammatoire dans le corps. Il existe un lien entre les niveaux \u00e9lev\u00e9s de marqueurs inflammatoires (y compris la PCR) et le d\u00e9veloppement futur de maladies cardiaques. Cette corr\u00e9lation s\u2019applique m\u00eame aux hommes et aux femmes en sant\u00e9 dont le taux de cholest\u00e9rol est normal. Le niveau de PCR peut \u00eatre utilis\u00e9 par les m\u00e9decins dans le cadre de l\u2019\u00e9valuation du risque de maladie cardiaque d\u2019un patient, car il s\u2019agit d\u2019une mol\u00e9cule stable qui peut \u00eatre facilement mesur\u00e9e par une simple analyse sanguine.<\/p>\n<p>La PCR est \u00e9galement utilis\u00e9e pour v\u00e9rifier la pr\u00e9sence d\u2019une infection apr\u00e8s une intervention chirurgicale. Les taux de PCR augmentent normalement dans les 2 \u00e0 6 heures suivant l\u2019intervention, mais si le taux de PCR reste \u00e9lev\u00e9 3 jours apr\u00e8s l\u2019intervention, une infection peut \u00eatre pr\u00e9sente. Il est \u00e9galement utilis\u00e9 pour identifier et surveiller les signes suivants\u00a0: cancer des ganglions lymphatiques, maladie du syst\u00e8me immunitaire, gonflement douloureux des vaisseaux sanguins de la t\u00eate et du cou, infection d\u2019un os, et pour v\u00e9rifier si un traitement fonctionne bien pour un cancer ou une infection.<\/p>\n<h2><strong>Norme de pr\u00e9paration<\/strong><\/h2>\n<p>L\u2019\u00e9chantillonnage se fait habituellement le matin \u00e0 l\u2019h\u00f4pital. Aucune pr\u00e9paration particuli\u00e8re n\u2019est n\u00e9cessaire pour ce test. Le m\u00e9decin vous conseillera et vous recommandera si vous devez \u00eatre \u00e0 jeun avant l\u2019examen sanguin. Vous devriez informer votre m\u00e9decin de tout m\u00e9dicament que vous prenez avant l\u2019examen, car certains traitements m\u00e9dicaux peuvent interf\u00e9rer avec les r\u00e9sultats sanguins.<\/p>\n<h2><strong>L\u2019examen est-il douloureux ou dangereux\u00a0?<\/strong><\/h2>\n<p>L\u2019examen n\u2019est ni douloureux ni dangereux. Le patient peut ressentir une sensation de picotement \u00e0 l\u2019entr\u00e9e de l\u2019aiguille dans le bras lors de l\u2019extraction du sang pour examen.<\/p>\n<h2><strong>Comment se d\u00e9roule l\u2019examen\u00a0?<\/strong><\/h2>\n<p>L\u2019examen consiste en une simple prise de sang.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"author":11,"featured_media":0,"template":"","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.7.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Prot\u00e9ine C r\u00e9active - Humanitas.net<\/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.humanitas.net\/fr\/diseases\/proteine-c-reactive\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prot\u00e9ine C r\u00e9active - Humanitas.net\" \/>\n<meta property=\"og:description\" content=\"Qu\u2019est-ce que la prot\u00e9ine C r\u00e9active\u00a0? 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Les prot\u00e9ines C r\u00e9actives (PCR) sont l\u2019une des prot\u00e9ines plasmatiques appel\u00e9es prot\u00e9ines de phase aigu\u00eb. Il s\u2019agit de prot\u00e9ines dans lesquelles les concentrations plasmatiques augmentent ou diminuent de 25\u00a0% ou plus lors de troubles inflammatoires. 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