{"id":58829,"date":"2019-05-21T13:53:42","date_gmt":"2019-05-21T20:53:42","guid":{"rendered":"https:\/\/www.chronobiology.com\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers\/"},"modified":"2024-07-18T15:00:32","modified_gmt":"2024-07-18T22:00:32","slug":"la-luminoth-rapie-prot-ge-le-cerveau-contre-l-accumulation-de-substances-toxiques-l-origine-de-la-maladie-d-alzheimer","status":"publish","type":"post","link":"https:\/\/dev.chronobiology.com\/fr\/la-luminoth-rapie-prot-ge-le-cerveau-contre-l-accumulation-de-substances-toxiques-l-origine-de-la-maladie-d-alzheimer\/","title":{"rendered":"La luminoth\u00e9rapie prot\u00e8ge le cerveau contre l&rsquo;accumulation de substances toxiques \u00e0 l&rsquo;origine de la maladie d&rsquo;Alzheimer"},"content":{"rendered":"<p>La maladie d&rsquo;Alzheimer et les formes similaires de d\u00e9mence comptent parmi les maladies les plus redout\u00e9es du vieillissement. La recherche sugg\u00e8re que ces affections sont caus\u00e9es par des plaques et d&rsquo;autres accumulations de toxines dans les neurones de notre cerveau. De nouvelles \u00e9tudes sur la fa\u00e7on dont la luminoth\u00e9rapie prot\u00e8ge le cerveau ont montr\u00e9 que la luminoth\u00e9rapie &#8211; et m\u00eame la th\u00e9rapie sonore &#8211; peut contribuer \u00e0 r\u00e9duire les plaques et l&rsquo;accumulation de toxines qui peuvent entra\u00eener une perte de m\u00e9moire, un d\u00e9clin cognitif et d&rsquo;autres sympt\u00f4mes associ\u00e9s \u00e0 la d\u00e9mence.<\/p>\n<h2>L&rsquo;accumulation de toxines : une cause de la maladie d&rsquo;Alzheimer ?<\/h2>\n<p><a href=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-2.jpg\"><img decoding=\"async\" class=\"size-medium wp-image-29425 alignright\" title=\"Light Therapy Protects the Brain Against Toxic Buildup That Leads to Alzheimer's 1\" src=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-2-300x206.jpg\" alt=\"Light Therapy Protects the Brain Against Toxic Buildup That Leads to Alzheimer's 1\" width=\"300\" height=\"206\" srcset=\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-2-300x206.jpg 300w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-2-768x528.jpg 768w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-2.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Bien que la maladie d&rsquo;Alzheimer soit le plus souvent observ\u00e9e \u00e0 un \u00e2ge avanc\u00e9, elle ne fait pas partie du processus normal de vieillissement. S&rsquo;il est normal de souffrir d&rsquo;un d\u00e9clin cognitif lent et l\u00e9ger, les maladies neurod\u00e9g\u00e9n\u00e9ratives comme la maladie d&rsquo;Alzheimer pr\u00e9sentent des sympt\u00f4mes beaucoup plus rapides et graves.<\/p>\n<p>La maladie d&rsquo;Alzheimer et les afflictions similaires commencent par des pertes de m\u00e9moire, mais elles peuvent rapidement \u00e9voluer vers une perte de personnalit\u00e9, une perte des capacit\u00e9s mentales et une incapacit\u00e9 \u00e0 prendre soin de soi, m\u00eame de la mani\u00e8re la plus \u00e9l\u00e9mentaire. On pense que ces sympt\u00f4mes sont dus \u00e0 une accumulation de substances toxiques dans le cerveau. Ces toxines cr\u00e9ent des <a href=\"https:\/\/www.alz.org\/alzheimers-dementia\/what-is-alzheimers\" target=\"_blank\" rel=\"noopener noreferrer\">plaques et des enchev\u00eatrements dans les cellules c\u00e9r\u00e9brales<\/a> qui r\u00e9duisent progressivement la capacit\u00e9 des neurones \u00e0 fonctionner.<\/p>\n<p>La cause directe de la maladie d&rsquo;Alzheimer est connue, mais il est plus compliqu\u00e9 de trouver un rem\u00e8de. Les toxines impliqu\u00e9es dans la maladie d&rsquo;Alzheimer ne proviennent pas de notre environnement, mais plut\u00f4t de nos cellules c\u00e9r\u00e9brales elles-m\u00eames. Il s&rsquo;agit de d\u00e9chets m\u00e9taboliques que la plupart des gens sont capables d&rsquo;\u00e9liminer de leur corps. Pour <a href=\"https:\/\/www.chronobiology.com\/not-getting-enough-deep-sleep-linked-to-alzheimers\/\" target=\"_blank\" rel=\"noopener noreferrer\">diverses raisons<\/a>, certaines personnes ne parviennent pas \u00e0 se d\u00e9barrasser aussi efficacement de ces d\u00e9chets m\u00e9taboliques, ce qui entra\u00eene le d\u00e9veloppement de la maladie. Toutefois, de nouvelles d\u00e9couvertes pourraient offrir de nouvelles pistes pour pr\u00e9venir et traiter cette maladie et d&rsquo;autres causes de d\u00e9mence.<\/p>\n<h2>La luminoth\u00e9rapie pourrait-elle r\u00e9duire les toxines \u00e0 l&rsquo;origine de la maladie d&rsquo;Alzheimer ?<\/h2>\n<p>Nos neurones communiquent par une activit\u00e9 \u00e9lectrique oscillante ; des vagues d&rsquo;impulsions \u00e9lectriques sont envoy\u00e9es \u00e0 travers le cerveau et les nerfs. Dans le cadre d&rsquo;une \u00e9tude clinique, des chercheurs ont d\u00e9cid\u00e9 de v\u00e9rifier si l&rsquo;exposition de souris atteintes de la maladie d&rsquo;Alzheimer \u00e0 une lumi\u00e8re vacillante pouvait stimuler le fonctionnement de leurs neurones.<\/p>\n<p>De mani\u00e8re surprenante, il a \u00e9t\u00e9 constat\u00e9 que les souris expos\u00e9es \u00e0 des lumi\u00e8res vacillantes avaient non seulement des signaux \u00e9lectriques plus rapides, mais aussi des <a href=\"https:\/\/www.nature.com\/articles\/nature20587\" target=\"_blank\" rel=\"noopener noreferrer\">niveaux plus faibles de la substance toxique b\u00eata-amylo\u00efde qui cause la maladie<\/a>. Dans une \u00e9tude plus r\u00e9cente, les chercheurs ont combin\u00e9 le scintillement des lumi\u00e8res avec le son, ce qui a produit un effet encore plus spectaculaire sur les capacit\u00e9s cognitives.<br \/>\nun<a href=\"https:\/\/www.medicalnewstoday.com\/articles\/324749.php?\" target=\"_blank\" rel=\"noopener noreferrer\">effet encore plus spectaculaire sur les capacit\u00e9s cognitives et sur l&rsquo;accumulation de substances toxiques<\/a> dans le cerveau. Pour des raisons que nous ne comprenons pas compl\u00e8tement, certains types de <a href=\"https:\/\/www.cell.com\/cell\/fulltext\/S0092-8674(19)30163-1\" target=\"_blank\" rel=\"noopener noreferrer\">lumi\u00e8re et de son semblent travailler ensemble<\/a> pour aider le cerveau \u00e0 mieux fonctionner et \u00e0 \u00e9liminer certaines accumulations de d\u00e9chets toxiques.<\/p>\n<p>Les effets de ce traitement ont dur\u00e9 environ une semaine, ce qui sugg\u00e8re que les personnes (et les souris) qui utilisent ce traitement pourraient avoir besoin de suivre une th\u00e9rapie sur une base r\u00e9guli\u00e8re. Cependant, il existe peut-\u00eatre des moyens de modifier le traitement pour qu&rsquo;il ait des effets plus durables ou pour qu&rsquo;il puisse m\u00eame pr\u00e9venir la maladie chez les personnes qui y sont g\u00e9n\u00e9tiquement pr\u00e9dispos\u00e9es. Quoi qu&rsquo;il en soit, cette recherche offre un nouvel espoir de trouver un rem\u00e8de s\u00fbr et non m\u00e9dical \u00e0 une maladie pour laquelle il n&rsquo;existe actuellement que peu de traitements.<\/p>\n<h2>Comment la sonoth\u00e9rapie et la luminoth\u00e9rapie prot\u00e8gent le cerveau<\/h2>\n<p>Comment la lumi\u00e8re et le son peuvent-ils avoir un tel effet sur les neurones ? Les chercheurs pensent que cela est d\u00fb \u00e0 la fa\u00e7on dont les oscillations de la lumi\u00e8re et du son semblent affecter la microglie. Les microglies sont des cellules sp\u00e9cialis\u00e9es qui jouent le r\u00f4le de service d&rsquo;\u00e9limination des d\u00e9chets dans le cerveau. Ces cellules semblent pr\u00e9senter <a href=\"https:\/\/www.medicalnewstoday.com\/articles\/325118.php?utm_source=newsletter&amp;utm_medium=email&amp;utm_country=US&amp;utm_hcp=no&amp;utm_campaign=MNT%20Daily%20Full%20%28non-HCP%20US%29%20-%20OLD%20STYLE%202019-05-07&amp;utm_term=MNT%20Daily%20News%20%28non-HCP%20US%29\" target=\"_blank\" rel=\"noopener noreferrer\">moins d&rsquo;inflammation et une activit\u00e9 plus efficace<\/a> lorsque nous sommes expos\u00e9s \u00e0 la lumi\u00e8re et au son \u00e0 certaines fr\u00e9quences. Elles sont ainsi en mesure de remplir leurs fonctions plus efficacement, notamment en se d\u00e9barrassant des prot\u00e9ines toxiques qui peuvent causer la maladie d&rsquo;Alzheimer.<\/p>\n<p>Il est int\u00e9ressant de noter que cet effet ne semble se produire que dans les cerveaux pr\u00e9dispos\u00e9s \u00e0 la maladie d&rsquo;Alzheimer et qui commencent \u00e0 souffrir d&rsquo;une accumulation de toxines. Les souris dont le cerveau est jeune et ne pr\u00e9sente pas d&rsquo;accumulation de toxines ne subissent aucun effet. Il est possible que les personnes souffrant de d\u00e9mence aient une microglie d\u00e9ficiente qui peut \u00eatre partiellement gu\u00e9rie par les bonnes longueurs d&rsquo;onde de la lumi\u00e8re et les bonnes fr\u00e9quences du son.<\/p>\n<h2>La luminoth\u00e9rapie et la d\u00e9mence<\/h2>\n<p><a href=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-3.jpg\"><img decoding=\"async\" class=\"size-medium wp-image-29431 alignright\" title=\"Light Therapy Protects the Brain Against Toxic Buildup That Leads to Alzheimer's 2\" src=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-3-300x206.jpg\" alt=\"Light Therapy Protects the Brain Against Toxic Buildup That Leads to Alzheimer's 2\" width=\"300\" height=\"206\" srcset=\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-3-300x206.jpg 300w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-3-768x528.jpg 768w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2019\/05\/light-therapy-protects-the-brain-against-toxic-buildup-that-leads-to-alzheimers-3.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Il a \u00e9t\u00e9 d\u00e9montr\u00e9 que la luminoth\u00e9rapie pr\u00e9sente d&rsquo;autres avantages pour les personnes souffrant de la maladie d&rsquo;Alzheimer et d&rsquo;autres formes de d\u00e9mence. Il a \u00e9t\u00e9 d\u00e9montr\u00e9 que la luminoth\u00e9rapie pendant la journ\u00e9e <a href=\"https:\/\/www.alzheimers.org.uk\/about-dementia\/treatments\/alternative-therapies\/bright-light-therapy-and-dementia\" target=\"_blank\" rel=\"noopener noreferrer\">r\u00e9duit l&rsquo;agitation et d&rsquo;autres sympt\u00f4mes psychologiques d\u00e9sagr\u00e9ables<\/a> chez les personnes \u00e2g\u00e9es atteintes de d\u00e9mence. La luminoth\u00e9rapie s&rsquo;est \u00e9galement r\u00e9v\u00e9l\u00e9e <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3553247\/\" target=\"_blank\" rel=\"noopener noreferrer\">efficace pour traiter de nombreux troubles du sommeil<\/a> fr\u00e9quents chez les personnes atteintes de la maladie d&rsquo;Alzheimer.<\/p>\n<p>Il y a encore beaucoup de choses que nous ne comprenons pas sur la <a href=\"https:\/\/www.chronobiology.com\/melatonin-benefits-go-beyond-sleep-and-circadian-rhythm-regulation\/\" target=\"_blank\" rel=\"noopener noreferrer\">fa\u00e7on dont la lumi\u00e8re affecte le corps humain et le cerveau<\/a>. Bien que nous ne soyons pas encore en mesure d&rsquo;utiliser efficacement la lumi\u00e8re pour pr\u00e9venir et traiter la maladie d&rsquo;Alzheimer, elle reste un traitement prometteur pour l&rsquo;avenir. L&rsquo;apport d&rsquo;une <a href=\"https:\/\/www.chronobiology.com\/the-seasonality-of-alzheimers-dementia-symptoms-worsen-in-winter\/\" target=\"_blank\" rel=\"noopener noreferrer\">quantit\u00e9 ad\u00e9quate de lumi\u00e8re<\/a> au bon moment semble \u00eatre un moyen important de rester en bonne sant\u00e9 et de pr\u00e9venir les maladies.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La maladie d&rsquo;Alzheimer et les formes similaires de d\u00e9mence comptent parmi les maladies les plus redout\u00e9es du vieillissement. La recherche sugg\u00e8re que ces affections sont caus\u00e9es par des plaques et d&rsquo;autres accumulations de toxines dans les neurones de notre cerveau. De nouvelles \u00e9tudes sur la fa\u00e7on dont la luminoth\u00e9rapie prot\u00e8ge le cerveau ont montr\u00e9 que [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":29420,"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":[259,251,239],"tags":[],"class_list":{"0":"post-58829","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sante-mentale","8":"category-therapie-par-la-lumiere","9":"category-vieillissement","10":"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>La luminoth\u00e9rapie prot\u00e8ge le cerveau contre l&#039;accumulation de substances toxiques \u00e0 l&#039;origine de la maladie d&#039;Alzheimer &#8211; Chronobiology.com<\/title>\n<meta name=\"description\" content=\"New studies suggest that light therapy protects the brain against the toxic build-up responsible for neurodegenerative diseases such as Alzheimer&#039;s.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dev.chronobiology.com\/fr\/la-luminoth-rapie-prot-ge-le-cerveau-contre-l-accumulation-de-substances-toxiques-l-origine-de-la-maladie-d-alzheimer\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La luminoth\u00e9rapie prot\u00e8ge le cerveau contre l&#039;accumulation de substances toxiques \u00e0 l&#039;origine de la maladie d&#039;Alzheimer\" \/>\n<meta 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