{"id":197528,"date":"2020-12-05T21:41:02","date_gmt":"2020-12-05T20:41:02","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=197528"},"modified":"2020-12-05T21:41:02","modified_gmt":"2020-12-05T20:41:02","slug":"le-chocolat-et-le-raisin-une-arme-contre-le-covid-19","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/le-chocolat-et-le-raisin-une-arme-contre-le-covid-19\/","title":{"rendered":"Le chocolat et le raisin, une arme contre le Covid-19 ?"},"content":{"rendered":"<div>Certains compos\u00e9s chimiques pr\u00e9sents dans les raisins, le chocolat noir ou le th\u00e9 vert pourraient bloquer la fonction d\u2019une enzyme du SARS-CoV-2.<\/div>\n<div>Et si l\u2019alimentation jouait un r\u00f4le dans la lutte contre le Covid-19 ? C\u2019est ce que sugg\u00e8re une nouvelle \u00e9tude r\u00e9alis\u00e9e par des biologistes v\u00e9g\u00e9taux en Caroline du Nord (Etats-Unis). Gr\u00e2ce \u00e0 leur \u00e9tude, ils ont constat\u00e9 que des compos\u00e9s chimiques pr\u00e9sents dans les aliments (raisins, chocolat noir) ou certaines boissons comme le th\u00e9 vert bloquaient la fonction d&rsquo;une enzyme particuli\u00e8re, appel\u00e9e prot\u00e9ase, contenue dans le virus SARS-CoV-2 en se liant \u00e0 celle-ci. Ces conclusions ont \u00e9t\u00e9 publi\u00e9es dans la revue Frontiers in Plant Science.<\/div>\n<div>\u201cL&rsquo;un des objectifs de notre laboratoire est de trouver des nutraceutiques dans les aliments ou les plantes m\u00e9dicinales qui inhibent la mani\u00e8re dont un virus se fixe aux cellules humaines ou la propagation d&rsquo;un virus dans les cellules humaines\u201d, rapporte le Pr De-Yu Xie, auteur principal de l\u2019\u00e9tude. Ces prot\u00e9ases sont importantes pour la sant\u00e9 et la viabilit\u00e9 des cellules et des virus. Si elles sont inhib\u00e9es, les cellules ne peuvent pas remplir de nombreuses fonctions importantes comme la r\u00e9plication.<\/div>\n<div><\/div>\n<div><strong>*Le pouvoir du chocolat noir<\/strong><\/div>\n<div>Pour cette \u00e9tude, les chercheurs ont men\u00e9 conjointement des simulations informatiques et des \u00e9tudes en laboratoires afin de d\u00e9terminer avec pr\u00e9cision comment la prot\u00e9ase principale (Mpro) du SARS-CoV-2 r\u00e9agit au contact de ces compos\u00e9s chimiques v\u00e9g\u00e9taux. Les simulations informatiques ont montr\u00e9 que les compos\u00e9s chimiques \u00e9tudi\u00e9s du th\u00e9 vert, de deux vari\u00e9t\u00e9s de raisins muscadins, de la poudre de cacao et du chocolat noir \u00e9taient capables de se lier \u00e0 diff\u00e9rentes portions de Mpro.<\/div>\n<div>Pr\u00e9cis\u00e9ment, Mpro poss\u00e8de une partie semblable \u00e0 une poche qui a \u00e9t\u00e9 \u201cremplie par les compos\u00e9s chimiques\u201d, a pr\u00e9cis\u00e9 le chercheur. Avant d\u2019ajouter : \u201cLorsque cette poche a \u00e9t\u00e9 remplie, la prot\u00e9ase a perdu sa fonction importante\u201d. Les compos\u00e9s chimiques pr\u00e9sents dans le th\u00e9 vert et les raisins muscadine ont tr\u00e8s bien r\u00e9ussi \u00e0 inhiber la fonction de Mpro. Concernant les compos\u00e9s chimiques contenus dans la poudre de cacao et le chocolat noir, ils ont r\u00e9duit de moiti\u00e9 l&rsquo;activit\u00e9 du Mpro. \u201cLe th\u00e9 vert a cinq compos\u00e9s chimiques test\u00e9s qui se lient \u00e0 diff\u00e9rents sites dans la poche du Mpro, le submergeant essentiellement pour inhiber sa fonction. La peau et les graines des raisins de Muscadine contiennent ces substances chimiques inhibitrices. Les plantes utilisent ces compos\u00e9s pour se prot\u00e9ger, il n&rsquo;est donc pas surprenant que les feuilles et les peaux des plantes contiennent ces compos\u00e9s b\u00e9n\u00e9fiques\u201d, r\u00e9sume l\u2019auteur de l\u2019\u00e9tude.<\/div>\n<div style=\"text-align: right\">(Yahoo Actualit\u00e9s)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Certains compos\u00e9s chimiques pr\u00e9sents dans les raisins, le chocolat noir ou le th\u00e9 vert pourraient bloquer la fonction d\u2019une enzyme du SARS-CoV-2. Et si l\u2019alimentation jouait un r\u00f4le dans la&hellip;<\/p>\n","protected":false},"author":60,"featured_media":197529,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2515],"tags":[],"class_list":["post-197528","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sante"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Le chocolat et le raisin, une arme contre le Covid-19 ? - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"Certains compos\u00e9s chimiques pr\u00e9sents dans les raisins, le chocolat noir ou le th\u00e9 vert pourraient bloquer la fonction d\u2019une enzyme du SARS-CoV-2. 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