{"id":54955,"date":"2023-12-20T06:37:53","date_gmt":"2023-12-20T14:37:53","guid":{"rendered":"https:\/\/www.chronobiology.com\/melatonin-kronobiologi\/mekanisme\/"},"modified":"2023-12-20T06:37:54","modified_gmt":"2023-12-20T14:37:54","slug":"mekanisme","status":"publish","type":"page","link":"https:\/\/dev.chronobiology.com\/da\/melatonin-kronobiologi\/mekanisme\/","title":{"rendered":"Mekanisme"},"content":{"rendered":"

[vc_row full_width=”stretch_row” el_class=”banner-top”][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h1|text_align:center” use_theme_fonts=”yes”][\/vc_column][\/vc_row][vc_row el_class=”melatoninfacts2″][vc_column][vc_column_text]<\/p>\n

Mekanisme<\/h2>\n

Melatonin har flere mekanismer, hvorigennem det kan opn\u00e5 forskellige resultater i organismen. Blandt disse skelner man mellem receptormedierede effekter, dvs. dem, der fungerer i henhold til n\u00f8glehulsprincippet, og de mekanismer, der finder sted selv uden brug af docking-steder.<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_tta_accordion color=”turquoise” gap=”35″ c_icon=”chevron” c_position=”right” active_section=”99″ no_fill=”true” collapsible_all=”true”][vc_tta_section title=”Melatonin-receptorer” tab_id=”1479159301199-fd863768-f6affc8d-716d”][vc_row_inner css=”.vc_custom_1479390515497{background-image: url(https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/11\/mechanism_1.jpg?id=11685) !important;}”][vc_column_inner][vc_column_text]Melatoninreceptorer kan inddeles i forskellige klasser. Man skelner mellem melatoninreceptor 1 og 2 (MTL1 og MTL2), som hver is\u00e6r har deres egen specifikke udbredelse og delvist specifikke funktion. Begge er s\u00e5kaldte membranreceptorer, p\u00e5 hvis yderside melatonin er i stand til at docke. Hvis denne type binding opst\u00e5r, udl\u00f8ses en r\u00e6kke processer gennem specifikke G-proteiner inde i cellen, som f\u00f8rer til efterf\u00f8lgende effekter af melatonin p\u00e5 cellen. Derudover er der en tredje klasse af receptorer, som ikke er forankret i cellemembranen, men befinder sig inde i cellen. Denne klasse af receptorer findes dog kun i visse dyrearter og spiller ikke en v\u00e6sentlig rolle for mennesker.<\/p>\n

De ovenfor n\u00e6vnte melatoninreceptorer 1 og 2 er fordelt p\u00e5 en r\u00e6kke organer, hvor man finder dem p\u00e5 specifikke cellestrukturer. Tidsinformationen, som er baseret p\u00e5 den oscillerende (svingende) melatoninkoncentration, overf\u00f8res til v\u00e6v og hele kroppen.<\/p>\n

Den h\u00f8jeste t\u00e6thed af melatoninreceptorer findes i visse omr\u00e5der af hjernen. Det er interessant at bem\u00e6rke, at fordelingen kan v\u00e6re meget forskellig blandt forskellige arter. For eksempel har gnavere og pattedyr hovedsageligt receptorer i de omr\u00e5der, der styrer det indre ur og gonadefunktionerne (organer i kroppen, der er n\u00f8dvendige for at producere k\u00f8nshormoner og tjene til reproduktion), mens det andet omr\u00e5de (ud over det indre ur, der indeholder flest receptorer) hos mennesker er i lillehjernen og hjernebarken, men ikke i de omr\u00e5der, der styrer gonadefunktionerne. Dette g\u00f8r det klart, at melatonins funktion har \u00e6ndret sig i l\u00f8bet af evolutionen, og at ikke alle de resultater, der kan indsamles fra dyremodeller, kan overf\u00f8res til mennesker en-til-en. Ud over receptorerne i hjernen er mange af disse bindingssteder blevet opdaget i andre perifere organer. Et par af disse organer, som indeholder melatoninreceptorer, omfatter bugspytkirtlen, leveren, \u00f8jnene, huden, visse blodkar, tarmkanalen og dele af k\u00f8nskirtlerne. Den pr\u00e6cise funktion af disse receptorer er stadig genstand for omfattende forskning. Det er sikkert, at disse forbindelsessteder spiller en rolle i at forbinde dag\/nat-rytmen med specifikke organfunktioner. P\u00e5 den anden side postuleres det ogs\u00e5, at melatonin har yderligere funktioner, som nemmest beskrives som finjustering og synkronisering af samspillet mellem organer.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_tta_section][\/vc_tta_accordion][vc_tta_accordion color=”turquoise” gap=”35″ c_icon=”chevron” c_position=”right” active_section=”99″ no_fill=”true” collapsible_all=”true”][vc_tta_section title=”Radikale opfangere” tab_id=”1480969757168-be328310-c9dc”][vc_row_inner css=”.vc_custom_1479390486079{background-image: url(https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/11\/mechanism_2.jpg?id=11684) !important;}”][vc_column_inner][vc_column_text]Ud over melatonins receptoroverf\u00f8rende funktion, som er beskrevet ovenfor, har det ogs\u00e5 en antioxidativ effekt. I dette tilf\u00e6lde kr\u00e6ver det ikke specifikke bindingspunkter, men fungerer i stedet som en potent radikalfanger. Resultater fra dyrefors\u00f8g kan overf\u00f8res direkte til mennesker, da funktionen udelukkende er et resultat af melatonins molekyl\u00e6re struktur. Da melatonin kan tr\u00e6nge ind i n\u00e6sten alle celler, er det i stand til at beskytte alle organer, s\u00e5 snart det er til stede. I betragtning af, at hormonet mest produceres om natten og meget let kan tr\u00e6nge igennem blod-hjerne-barrieren, kan det spille en forebyggende rolle mod oxidative forstyrrelser i b\u00e5de hjernens nerveceller og i andre organer under nattes\u00f8vnen. Dette er ogs\u00e5 med til at forklare en r\u00e6kke positive effekter af melatonin, som ikke er direkte relateret til dets interaktion med specifikke receptorer, men som er afh\u00e6ngige af dets radikalfjernende egenskaber, uanset om det er hos dyr eller mennesker.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_tta_section][\/vc_tta_accordion][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row full_width=”stretch_row” el_class=”banner-top”][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h1|text_align:center” use_theme_fonts=”yes”][\/vc_column][\/vc_row][vc_row el_class=”melatoninfacts2″][vc_column][vc_column_text] Mekanisme Melatonin har flere mekanismer, hvorigennem det kan opn\u00e5 forskellige resultater i organismen. Blandt disse skelner man mellem receptormedierede effekter, dvs. dem, der fungerer i henhold til n\u00f8glehulsprincippet, og de mekanismer, der finder sted selv uden brug af docking-steder. [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_tta_accordion color=”turquoise” gap=”35″ c_icon=”chevron” c_position=”right” active_section=”99″ no_fill=”true” collapsible_all=”true”][vc_tta_section title=”Melatonin-receptorer” […]<\/p>\n","protected":false},"author":15,"featured_media":48513,"parent":54943,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","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":"full-width-content","footnotes":""},"categories":[402,396],"class_list":{"0":"post-54955","1":"page","2":"type-page","3":"status-publish","4":"has-post-thumbnail","6":"category-melatonin-da","7":"category-soevn","8":"entry"},"acf":[],"yoast_head":"\nMekanisme – Chronobiology.com<\/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:\/\/dev.chronobiology.com\/da\/melatonin-kronobiologi\/mekanisme\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mekanisme\" \/>\n<meta property=\"og:description\" content=\"[vc_row full_width=”stretch_row” el_class=”banner-top”][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h1|text_align:center” use_theme_fonts=”yes”][\/vc_column][\/vc_row][vc_row el_class=”melatoninfacts2″][vc_column][vc_column_text] Mekanisme Melatonin har flere mekanismer, hvorigennem det kan opn\u00e5 forskellige resultater i organismen. 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