{"id":58344,"date":"2016-02-29T11:51:14","date_gmt":"2016-02-29T19:51:14","guid":{"rendered":"https:\/\/www.chronobiology.com\/discovered-how-temperature-shifts-the-circadian-clock\/"},"modified":"2024-07-18T14:45:38","modified_gmt":"2024-07-18T21:45:38","slug":"d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne","status":"publish","type":"post","link":"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/","title":{"rendered":"D\u00e9couverte : Comment la temp\u00e9rature modifie l&rsquo;horloge circadienne"},"content":{"rendered":"<p>Avez-vous sommeil lorsque vous avez froid ? Des chercheurs ont d\u00e9couvert de nouvelles informations sur l&rsquo;influence de la temp\u00e9rature sur le rythme circadien.<\/p>\n<p>Le rythme circadien est un cycle de 24 heures qui d\u00e9termine le moment o\u00f9 nous dormons, le moment o\u00f9 nous nous r\u00e9veillons et le moment o\u00f9 notre corps effectue d&rsquo;importants processus de r\u00e9paration cellulaire. Cette horloge interne est r\u00e9gl\u00e9e par des signaux externes tels que la lumi\u00e8re et la temp\u00e9rature. Si le m\u00e9canisme qui sous-tend les effets de la lumi\u00e8re sur le rythme circadien est connu depuis longtemps, ses r\u00e9ponses aux changements de temp\u00e9rature sont rest\u00e9es un myst\u00e8re. Cependant, les chercheurs ont maintenant acquis de nouvelles connaissances sur la mani\u00e8re exacte dont la temp\u00e9rature affecte le rythme circadien.<\/p>\n<h2>Les drosophiles et la temp\u00e9rature<\/h2>\n<p>Tous les \u00eatres vivants ont un rythme circadien. En particulier, les mouches des fruits sont souvent \u00e9tudi\u00e9es parce qu&rsquo;elles arrivent rapidement \u00e0 maturit\u00e9, ce qui permet aux chercheurs d&rsquo;observer rapidement les effets des changements g\u00e9n\u00e9tiques. En outre, les cellules des mouches des fruits ne sont pas si diff\u00e9rentes de celles des humains, de sorte que l&rsquo;\u00e9tude de ces petits insectes nous permet de faire d&rsquo;importantes d\u00e9couvertes sur la biologie cellulaire. Dans une \u00e9tude r\u00e9cente, <a href=\"http:\/\/neurosciencenews.com\/temperature-circadian-clock-genetics-3147\/?utm_source=hootsuite\" target=\"_blank\" rel=\"noopener\">les scientifiques ont examin\u00e9 comment le cerveau de la mouche des fruits d\u00e9tecte les changements de temp\u00e9rature<\/a> pour essayer de d\u00e9terminer exactement comment la temp\u00e9rature affecte le rythme circadien.<\/p>\n<p>Comme les mouches des fruits n&rsquo;ont pas de peau pour d\u00e9tecter la temp\u00e9rature, elles ont des capteurs de temp\u00e9rature dans leurs antennes. Les mouches des fruits utilisent la temp\u00e9rature pour synchroniser leur rythme circadien avec leur environnement. Cependant, on a d\u00e9couvert que les mouches des fruits d\u00e9pourvues du g\u00e8ne IR25A sont incapables d&rsquo;ajuster leur rythme circadien pour r\u00e9pondre aux changements de temp\u00e9rature. Cela sugg\u00e8re que les prot\u00e9ines produites par IR25A, qui ont \u00e9t\u00e9 nomm\u00e9es \u00e0 juste titre Period et Timeless, sont responsables de la d\u00e9tection et\/ou de la r\u00e9ponse \u00e0 la temp\u00e9rature en tant que rep\u00e8re temporel.<\/p>\n<h2>De nouvelles perspectives sur la fa\u00e7on dont la temp\u00e9rature affecte le rythme circadien<\/h2>\n<p><a href=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock.jpg\" rel=\"attachment wp-att-8551\"><img decoding=\"async\" class=\"alignright size-medium wp-image-8551\" src=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-300x200.jpg\" alt=\"Discovered: How Temperature Shifts the Circadian Clock\" width=\"300\" height=\"200\" srcset=\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-300x200.jpg 300w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-768x513.jpg 768w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Cette recherche est importante car elle fournit une base g\u00e9n\u00e9tique \u00e0 ce que les scientifiques savent depuis longtemps : Les changements de temp\u00e9rature affectent le rythme circadien. Cependant, la temp\u00e9rature n&rsquo;affecte pas l&rsquo;horloge interne de la m\u00eame mani\u00e8re que la lumi\u00e8re et d&rsquo;autres signaux externes. Les signaux lumineux affectent le rythme circadien par une seule voie principale : de la r\u00e9tine au noyau suprachiasmatique de l&rsquo;hypothalamus jusqu&rsquo;\u00e0 la glande pin\u00e9ale, o\u00f9 la m\u00e9latonine est fabriqu\u00e9e. En revanche, il semble qu&rsquo;il y ait plusieurs voies pour que la temp\u00e9rature affecte le rythme circadien.<\/p>\n<p>En outre, il existe <a href=\"http:\/\/www.medicalnewstoday.com\/releases\/303488.php?tw\" target=\"_blank\" rel=\"noopener\">une diff\u00e9rence dans la mani\u00e8re dont la temp\u00e9rature agit comme un rep\u00e8re temporel<\/a>. Bien qu&rsquo;elle ne puisse pas \u00ab\u00a0r\u00e9initialiser\u00a0\u00bb les horloges internes, comme le font la lumi\u00e8re et la m\u00e9latonine, les changements de temp\u00e9rature les font l\u00e9g\u00e8rement avancer ou reculer. Cela pourrait expliquer en partie pourquoi les gens s&rsquo;endorment lorsqu&rsquo;ils ont froid, ou pourquoi ils ont g\u00e9n\u00e9ralement plus d&rsquo;\u00e9nergie pendant les mois chauds.<\/p>\n<h2>Comment cela s&rsquo;applique-t-il \u00e0 l&rsquo;homme ?<\/h2>\n<p>Bien que cette \u00e9tude ait \u00e9t\u00e9 r\u00e9alis\u00e9e sur des mouches \u00e0 fruits, elle a de nombreuses implications pour la sant\u00e9 humaine. Les mouches \u00e0 fruits ont des processus cellulaires similaires \u00e0 ceux des humains, c&rsquo;est pourquoi elles sont si souvent \u00e9tudi\u00e9es pour rechercher les g\u00e8nes \u00e0 l&rsquo;origine de certains processus corporels. De nombreuses recherches sugg\u00e8rent que le <a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0022202X15351435\" target=\"_blank\" rel=\"noopener\">rythme circadien humain pr\u00e9sente \u00e9galement une r\u00e9ponse marqu\u00e9e aux changements de temp\u00e9rature<\/a>. Bien que des recherches suppl\u00e9mentaires soient n\u00e9cessaires, il est probable que nous ayons un g\u00e8ne similaire \u00e0 IR25A qui fabrique des prot\u00e9ines similaires avec des fonctions similaires.<\/p>\n<p>Il se peut qu&rsquo;\u00e0 l&rsquo;avenir, la temp\u00e9rature soit utilis\u00e9e pour traiter les <a href=\"https:\/\/www.chronobiology.com\/circadian-sleep-disorders\/\" target=\"_blank\" rel=\"noopener\">troubles du sommeil circadien<\/a>, tout comme la luminoth\u00e9rapie et la <a href=\"https:\/\/www.chronobiology.com\/melatonin-chronobiology\/\" target=\"_blank\" rel=\"noopener\">m\u00e9latonine<\/a> le sont aujourd&rsquo;hui. La temp\u00e9rature semble avoir un impact important sur le rythme circadien et pourrait \u00eatre une question centrale pour les personnes souffrant de probl\u00e8mes de sommeil et d&rsquo;autres troubles du rythme circadien.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avez-vous sommeil lorsque vous avez froid ? Des chercheurs ont d\u00e9couvert de nouvelles informations sur l&rsquo;influence de la temp\u00e9rature sur le rythme circadien. Le rythme circadien est un cycle de 24 heures qui d\u00e9termine le moment o\u00f9 nous dormons, le moment o\u00f9 nous nous r\u00e9veillons et le moment o\u00f9 notre corps effectue d&rsquo;importants processus de [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":24236,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[174,255],"tags":[],"class_list":{"0":"post-58344","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-le-rythme-circadien","8":"category-sommeil","9":"entry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.4 (Yoast SEO v23.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>D\u00e9couverte : Comment la temp\u00e9rature modifie l&#039;horloge circadienne &#8211; Chronobiology.com<\/title>\n<meta name=\"description\" content=\"Do you get sleepy when you are cold? 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Researchers have discovered new insights about how temperature affects the circadian rhythm.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/\" \/>\n<meta property=\"og:site_name\" content=\"Chronobiology.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/chronobiology\" \/>\n<meta property=\"article:published_time\" content=\"2016-02-29T19:51:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-18T21:45:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1800\" \/>\n\t<meta property=\"og:image:height\" content=\"679\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Denise Abraham\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@chronobionews\" \/>\n<meta name=\"twitter:site\" content=\"@chronobionews\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Denise Abraham\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/\"},\"author\":{\"name\":\"Denise Abraham\",\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/#\/schema\/person\/d87d6fd6ff2c535fecb1230d3eb71ea4\"},\"headline\":\"D\u00e9couverte : Comment la temp\u00e9rature modifie l&rsquo;horloge circadienne\",\"datePublished\":\"2016-02-29T19:51:14+00:00\",\"dateModified\":\"2024-07-18T21:45:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/\"},\"wordCount\":769,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/#organization\"},\"image\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-2.jpg\",\"articleSection\":[\"Le-rythme circadien\",\"Sommeil\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/\",\"url\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/\",\"name\":\"D\u00e9couverte : Comment la temp\u00e9rature modifie l'horloge circadienne &#8211; Chronobiology.com\",\"isPartOf\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/dev.chronobiology.com\/fr\/d-couverte-comment-la-temp-rature-modifie-l-horloge-circadienne\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2016\/02\/discovered-how-temperature-shifts-the-circadian-clock-2.jpg\",\"datePublished\":\"2016-02-29T19:51:14+00:00\",\"dateModified\":\"2024-07-18T21:45:38+00:00\",\"description\":\"Do you get sleepy when you are cold? 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