{"id":7132,"date":"2017-04-03T12:48:37","date_gmt":"2017-04-03T18:48:37","guid":{"rendered":"https:\/\/askthescientists.com\/?p=7132\/"},"modified":"2020-02-20T09:48:11","modified_gmt":"2020-02-20T16:48:11","slug":"b-vitamins-air-pollution","status":"publish","type":"post","link":"https:\/\/askthescientists.com\/fr\/b-vitamins-air-pollution\/","title":{"rendered":"R\u00e9duire les effets n\u00e9gatifs de la pollution atmosph\u00e9rique sur la sant\u00e9"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-large wp-image-6406\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-1030x456.jpg\" alt=\"\" width=\"1030\" height=\"456\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-1030x456.jpg 1030w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-400x177.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-835x369.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-768x340.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-1500x663.jpg 1500w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-705x312.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-450x199.jpg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution-300x133.jpg 300w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/air-pollution.jpg 1200w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/p>\n<p>Respirez profond\u00e9ment. C\u2019est une bonne id\u00e9e pour votre sant\u00e9 mentale. Mais si l\u2019air est pollu\u00e9, devriez-vous bien vous sentir en respirant profond\u00e9ment? Quel est l\u2019impact de la pollution de l\u2019air sur votre sant\u00e9?<\/p>\n<p>La r\u00e9ponse est simple\u00a0: la pollution atmosph\u00e9rique est un important motif d\u2019inqui\u00e9tude pour la sant\u00e9 humaine, en plus d\u2019\u00eatre un facteur de d\u00e9clenchement de plusieurs maladies. Les effets sur la sant\u00e9 les plus courants de la pollution atmosph\u00e9rique sont les troubles des voies respiratoires, comme la toux, l\u2019asthme et l\u2019aggravation de maladies respiratoires existantes. Dans certains cas, la pollution de l\u2019air peut \u00eatre associ\u00e9e \u00e0 des probl\u00e8mes cardiovasculaires graves.<\/p>\n<p>Parmi les causes les plus courantes de pollution atmosph\u00e9rique, citons les centrales \u00e9lectriques, les installations de fabrication, les appareils de chauffage \u00e0 combustible, les automobiles et les feux incontr\u00f4l\u00e9s. Malgr\u00e9 une r\u00e9glementation gouvernementale accrue visant \u00e0 r\u00e9duire les \u00e9missions, ainsi que l\u2019utilisation d\u2019appareils \u00e0 combustion modernes, plus \u00e9cologiques, la qualit\u00e9 de l\u2019air dans de nombreuses r\u00e9gions reste mauvaise. Ce probl\u00e8me ne se limite d\u2019ailleurs pas aux grandes villes, l\u2019Organisation mondiale de la sant\u00e9 (OMS) estimant que 92\u00a0% de la population mondiale vit dans des endroits o\u00f9 la qualit\u00e9 de l\u2019air est m\u00e9diocre.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-6407 size-full\" style=\"font-size: inherit;\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison.png\" alt=\"\" width=\"960\" height=\"360\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison.png 960w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison-300x113.png 300w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison-768x288.png 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison-705x264.png 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/03\/Beijing_smog_comparison-450x169.png 450w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/p>\n<p style=\"text-align: center;\">Beijing \u2013 Apr\u00e8s un orage (\u00e0 gauche) et pendant un \u00e9pisode de pollution atmosph\u00e9rique visible (\u00e0 droite)<\/p>\n<p>L\u2019une des formes les plus dangereuses de la pollution atmosph\u00e9rique est la poussi\u00e8re fine, connue sous le nom de PM<sub>2.5<\/sub>, dont le diam\u00e8tre est inf\u00e9rieur \u00e0 2,5 microm\u00e8tres. Parmi les effets n\u00e9gatifs potentiels, on sait qu\u2019une exposition \u00e0 ces particules peut induire des modifications \u00e9pig\u00e9n\u00e9tiques (les commutateurs qui activent diff\u00e9rents aspects du code g\u00e9n\u00e9tique) de l\u2019ADN pouvant \u00eatre nuisibles \u00e0 la sant\u00e9.<\/p>\n<h2><strong>Comment les vitamines B pourraient aider \u00e0 prot\u00e9ger votre sant\u00e9 de l\u2019air pollu\u00e9<\/strong><\/h2>\n<p>Arr\u00eater de respirer n\u2019est pas une option et l\u2019ultrafiltration peut ne pas \u00eatre financi\u00e8rement r\u00e9alisable. Quelle est donc la solution pour aider \u00e0 att\u00e9nuer l\u2019impact de la pollution atmosph\u00e9rique sur la sant\u00e9?<\/p>\n<p>Une option pourrait \u00eatre l\u2019alimentation. Les mod\u00e8les animaux ont d\u00e9j\u00e0 montr\u00e9 qu\u2019un apport en vitamines B (et autres nutriments riches en m\u00e9thyle) peut aider \u00e0 r\u00e9duire les effets n\u00e9gatifs des stresseurs environnementaux sur l\u2019ADN.<\/p>\n<p>Les vitamines B ont fait l\u2019objet d\u2019une \u00e9tude publi\u00e9e dans la revue <em>PNAS<\/em> avec pour but de d\u00e9terminer si les r\u00e9sultats observ\u00e9s pr\u00e9c\u00e9demment chez les animaux \u00e9taient valables chez les humains. Au cours du traitement, les participants ont re\u00e7u un apport quotidien de 2,5\u00a0mg d\u2019acide folique, 50\u00a0mg de vitamine\u00a0B6 et 1\u00a0mg de vitamine\u00a0B12 avant d\u2019\u00eatre expos\u00e9s aux PM<sub>2.5<\/sub>. L\u2019objectif \u00e9tait de voir si les modifications \u00e9pig\u00e9n\u00e9tiques \u00e9taient minimis\u00e9es par une suppl\u00e9mentation en vitamines B.<\/p>\n<p>\u00c0 la suite de l\u2019exposition aux PM<sub>2.5<\/sub>, on a mesur\u00e9 l\u2019ADN des participants \u00e0 diff\u00e9rents endroits afin de constater l\u2019ampleur des modifications. Dans les dix principaux endroits, la suppl\u00e9mentation en vitamines B a permis d\u2019att\u00e9nuer l\u2019alt\u00e9ration de l\u2019ADN \u00e0 raison de 28\u00a0% \u00e0 76\u00a0% par rapport aux sujets ayant re\u00e7u un placebo.<\/p>\n<p>Des recherches plus approfondies doivent \u00eatre men\u00e9es, mais cette \u00e9tude montre que des suppl\u00e9ments de vitamine B peuvent aider \u00e0 se pr\u00e9munir contre les effets n\u00e9gatifs de la pollution de l\u2019air.<\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/28289216\" target=\"_blank\" rel=\"noopener noreferrer\">Zhong J, Karlsson O, Wang G, et al. B vitamins attenuate the epigenetic effects of ambient fine particles in a pilot human intervention trial. Proc Natl Acad Sci USA. 2017;114(13):3503-3508.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Respirez profond\u00e9ment. C\u2019est une bonne id\u00e9e pour votre sant\u00e9 mentale. Mais si l\u2019air est pollu\u00e9, devriez-vous bien vous sentir en respirant profond\u00e9ment? Quel est l\u2019impact de la pollution de l\u2019air sur votre sant\u00e9? La r\u00e9ponse est simple\u00a0: la pollution atmosph\u00e9rique est un important motif d\u2019inqui\u00e9tude pour la sant\u00e9 humaine, en plus d\u2019\u00eatre un facteur de [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":47493,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[284],"tags":[20731],"class_list":["post-7132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition_spotlight-fr","tag-healthy-habits-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>R\u00e9duire les effets n\u00e9gatifs de la pollution atmosph\u00e9rique sur la sant\u00e9 - Ask The Scientists<\/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:\/\/askthescientists.com\/fr\/b-vitamins-air-pollution\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9duire les effets n\u00e9gatifs de la pollution atmosph\u00e9rique sur la sant\u00e9 - Ask The Scientists\" \/>\n<meta property=\"og:description\" content=\"Respirez profond\u00e9ment. C\u2019est une bonne id\u00e9e pour votre sant\u00e9 mentale. Mais si l\u2019air est pollu\u00e9, devriez-vous bien vous sentir en respirant profond\u00e9ment? Quel est l\u2019impact de la pollution de l\u2019air sur votre sant\u00e9? 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C\u2019est une bonne id\u00e9e pour votre sant\u00e9 mentale. Mais si l\u2019air est pollu\u00e9, devriez-vous bien vous sentir en respirant profond\u00e9ment? Quel est l\u2019impact de la pollution de l\u2019air sur votre sant\u00e9? 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