{"id":9037,"date":"2024-08-15T18:00:31","date_gmt":"2024-08-15T18:00:31","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=9037"},"modified":"2024-08-15T18:00:31","modified_gmt":"2024-08-15T18:00:31","slug":"black-fruit-gland","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/da\/sort-frugtkirtel\/","title":{"rendered":"Den beskyttende virkning af anthocyaniner fra den sorte frugtkirtel fra det kinesiske parasoltr\u00e6 p\u00e5 oxidativ stress og apoptose induceret af A \u03b2 1-42 i SH-SY5Y-celler gennem Nrf2-mekanismen"},"content":{"rendered":"<p>Den beskyttende virkning af anthocyaniner fra den sorte frugtkirtel fra det kinesiske parasoltr\u00e6 p\u00e5 oxidativ stress og apoptose induceret af A \u03b2 1-42 i SH-SY5Y-celler gennem Nrf2-mekanismen<br \/>\nAlzheimers sygdom (AD), ogs\u00e5 kendt som senil demens, er en progressiv neurodegenerativ sygdom, der kan f\u00f8re til hukommelsestab, kognitiv sv\u00e6kkelse, adf\u00e6rdsforstyrrelser, sociale forstyrrelser og er den mest almindelige \u00e5rsag til demens. Det ansl\u00e5s, at 24 millioner mennesker p\u00e5 verdensplan lider af demens, hvoraf st\u00f8rstedelen lider af Alzheimers sygdom. Derudover er Alzheimers sygdom en almindelig aldersrelateret sygdom, som oftest findes hos mennesker p\u00e5 65 \u00e5r eller derover. Derfor er Alzheimers sygdom fortsat et af de st\u00f8rste sundhedsproblemer i en aldrende befolkning, og antallet af tilf\u00e6lde af Alzheimers sygdom vil stige markant i de kommende \u00e5rtier. P\u00e5 nuv\u00e6rende tidspunkt er der flere hypoteser, der kan forklare patogenesen af Alzheimers sygdom, herunder beta-amyloid (A \u03b2)-peptid og hyperfosforylering af tau-protein, som spiller en vigtig rolle i patogenesen af Alzheimers sygdom. Desuden tyder flere og flere beviser p\u00e5, at oxidativ stress og celleapoptose spiller en afg\u00f8rende rolle i Alzheimers sygdom. Relaterede unders\u00f8gelser har vist, at oxidativ stress hos AD-patienter kan f\u00f8re til celleapoptose. I mellemtiden kan oxidativ stress aktivere cellul\u00e6re beskyttelsesmekanismer, herunder endogene antioxidanter og antioxidante enzymsystemer. De vigtigste antioxidantenzymer, der er involveret i denne beskyttende effekt, er hemeoxygenase-1 (HO-1), superoxiddismutase (SOD), katalase (CAT) og glutathionperoxidase (CSH Px). Den transkriptionelle aktivering af antioxidante enzymgener reguleres hovedsageligt af nukleare transkriptionsrelaterede faktorer (Nrf2). Nogle fytokemikalier kan aktivere Nrf2\/antioxidant responselement (ARE)-signalering og derved opregulere udtrykket af antioxidantenzymer og forbedre neuronal modstandsdygtighed over for oxidativ stress. I hviletilstand findes Nrf2 i form af et kompleks. N\u00e5r komplekset forstyrres, translokeres Nrf2 til kernen og binder sig til ARE-sekvensen for at fremme ekspressionen af antioxidantenzymer. Det er kendt, at ekstracellul\u00e6r aflejring af A \u03b2 kan for\u00e5rsage oxidativ skade og apoptose af neuroner, og A \u03b2 har ogs\u00e5 vist sig at fremkalde overdreven produktion af ROS og hydrogenperoxid (H202) samt reducere SOD- og GSH Px-niveauer, hvilket f\u00f8rer til oxidativ stress.<\/p>\n<p>P\u00e5 nuv\u00e6rende tidspunkt er der gjort fremskridt inden for forskning i anthocyaniners forebyggende og beskyttende virkning p\u00e5 Alzheimers sygdom. Heo et al. unders\u00f8gte den neurobeskyttende aktivitet af jordb\u00e6rantocyaniner p\u00e5 cellemodeller for Alzheimers sygdom. Forskning har vist, at jordb\u00e6rantocyaniner kan reducere forekomsten af oxidativ stress og oxidativ stressinduceret celleapoptose og derved give en beskyttende effekt p\u00e5 nerveceller. Badshah et al. unders\u00f8gte de neurobeskyttende virkninger af anthocyaniner i sorte sojab\u00f8nner p\u00e5 A \u03b2 1-24-inducerede neurodegenerative celler og dyremodeller. Forskning har vist, at anthocyaniner effektivt reducerer neuronal apoptose ved at opretholde Ca2+-hom\u00f8ostase og har en beskyttende effekt p\u00e5 neuronale celler. Meng et al. unders\u00f8gte den beskyttende effekt af cyanidin-3-O-glucosid p\u00e5 cellemodeller for Alzheimers sygdom. Resultaterne tyder p\u00e5, at cyanidin-3-O-glucosid kan beskytte Alzheimers sygdom-celler mod A \u03b2 1-40-induceret oxidativ stress og apoptose ved at regulere cellul\u00e6re antioxidant- og apoptoserelaterede gener. Ovenst\u00e5ende forskning tyder p\u00e5, at anthocyaniner kan blive potentielle l\u00e6gemiddelkandidater til neurodegenerative sygdomme som Alzheimers. Desuden viste nyere forskning af Isaak et al., at traneb\u00e6rantocyaniner best\u00e5ende af cyanidin-3-O-galactosid, cyanidin-3-O-glucosid og cyanidin-3-O-arabinosid kan beskytte kardiomyocytter mod oxidativ stress og skader for\u00e5rsaget af celleapoptose. Tidligere unders\u00f8gelser har vist, at indholdet af anthocyaniner i den sorte frugtkirtel p\u00e5 elmetr\u00e6et er meget h\u00f8jt med en enkel struktur, der hovedsageligt best\u00e5r af cyanidin-3-O-galactosid, cyanidin-3-O-glucosid, cyanidin-3-O-arabinosid og cyanidin-3-O-xylosid. Anthocyaniner med h\u00f8j renhed er relativt lettere at isolere. Derfor valgte vi anthocyaniner med h\u00f8j renhed fra den sorte frugtkirtel af Eucommia ulmoides for at unders\u00f8ge deres forebyggende og beskyttende virkninger p\u00e5 oxidativ stress-relateret Alzheimers sygdom.<\/p>\n<p>ROS genereret af oxidativ stress skader direkte eller indirekte de fysiologiske funktioner af intracellul\u00e6re og makromolekyl\u00e6re stoffer som proteiner, lipider og nukleinsyrer og er det patologiske og fysiologiske grundlag for forekomsten af mange sygdomme. Kroppen danner et komplekst oxidativt stressresponssystem for at klare de skader, der for\u00e5rsages af frie radikaler og giftige stoffer. N\u00e5r kroppen uds\u00e6ttes for elektrofile stoffer eller reaktive iltarter, kan den fremkalde en r\u00e6kke beskyttende proteiner for at afhj\u00e6lpe skaderne p\u00e5 cellerne. Denne koordinerede reaktion reguleres af det antioxidantresponsive element (ARE) i den opstr\u00f8ms regulerende region af det beskyttende proteins DNA. Forskning har vist, at nuclear factor erythroid 2-related factor 2 (Nrf2) regulerer kodningen af antioxidantproteiner gennem sin interaktion med ARE, hvilket g\u00f8r det til den vigtigste endogene antioxidantstressvej, der er opdaget til dato. Tidligere unders\u00f8gelser har vist, at anthocyaniner p\u00e5 grund af deres st\u00e6rke antioxidantkapacitet kan fjerne frie radikaler i kroppen, reducere niveauet af oxidativ stress og beskytte kroppen mod skader for\u00e5rsaget af oxidativ stress. Yderligere forskning har vist, at anthocyaniner kan opregulere udtrykket af relaterede antioxidantenzymer gennem Nrf2-signalvejen, reducere niveauet af oxidativt stress og beskytte celler med Alzheimers sygdom eller dyremodeller mod skader for\u00e5rsaget af oxidativt stress.<\/p>\n<p>Desuden opst\u00e5r apoptose ofte i forbindelse med oxidativ stress, og apoptose i pattedyrsceller sker gennem b\u00e5de eksterne og interne veje. Den eksterne vej involverer binding af ekstracellul\u00e6re signalfaktorer til d\u00f8dsreceptorer i plasmamembranen. Den indre vej aktiveres af intracellul\u00e6r stress og udf\u00f8res gennem mitokondrier. Den mitokondrielle apoptosevej reguleres af Bcl-2-familien, som omfatter antiapoptotiske proteiner som Bcl-2 og Bcl xL samt proapoptotiske proteiner som Bax og Bak. I de senere \u00e5r har unders\u00f8gelser vist, at oxidativ stress og celleapoptose fremmer udviklingen af Alzheimers sygdom. Derfor er udforskning af bioaktive stoffer, der kan forhindre neuronal oxidativ skade og apoptose, af stor forskningsm\u00e6ssig betydning for forebyggelse og kontrol af Alzheimers sygdom.<\/p>\n<p>Som n\u00e6vnt i forordet har nogle unders\u00f8gelser rapporteret, at anthocyaniner kan forebygge og beskytte Alzheimers sygdom ved at reducere forekomsten af oxidativ stress og celleapoptose for\u00e5rsaget af oxidativ stress. Derfor brugte denne unders\u00f8gelse A \u03b2 1-42-inducerede SH-SY5Y-celler til at konstruere et cellemodelsystem for Alzheimers sygdom. ROS, SOD og H2O2 blev valgt som indikatorer for oxidativ stress, og anthocyaninernes beskyttende virkning p\u00e5 oxidativ stress og celleapoptose blev unders\u00f8gt gennem Nrf2-signalvejen for at evaluere anthocyaninernes cellebeskyttende virkning. Resultaterne viste, at anthocyaniner fra den sorte frugtkirtel i det kinesiske parasoltr\u00e6 kan aktivere Nrf2-metabolismen, opregulere mRNA- og proteinudtrykket af HO-1- og NQO1-gener og derved opregulere udtrykket af relaterede antioxidantenzymer som HO-1, NQO1, SOD og reducere det intracellul\u00e6re oxidative stressniveau. Samtidig kan anthocyaniner fra den sorte frugtkirtel fra det kinesiske parasoltr\u00e6 opregulere udtrykket af Bcl-2-genet og -proteinet, nedregulere udtrykket af Bax-genet og -proteinet og derved reducere celleapoptose. Derfor kan anthocyaniner fra Scutellaria lobata effektivt beskytte Alzheimers sygdom mod oxidativ stress og apoptose fremkaldt af A \u03b2 1-42 i SH-SY5Y-celler. Tidligere unders\u00f8gelser af anthocyaniners virkning p\u00e5 Alzheimers sygdom har for det meste brugt r\u00e5ekstrakter eller blandinger af anthocyaniner. Men den anthocyaninblanding, der blev brugt i denne unders\u00f8gelse, har en enkel og klar struktur med en renhed p\u00e5 over 93%, hvilket yderligere viser anthocyaninernes rolle i Alzheimers sygdom. Det er af stor betydning for den videre udvikling af anthocyaniner og relaterede produkter.<\/p>","protected":false},"excerpt":{"rendered":"<p>The protective effect of anthocyanins from the black fruit gland of the Chinese parasol tree on oxidative stress and apoptosis induced by A \u03b2 1-42 in SH-SY5Y cells through the Nrf2 mechanism Alzheimer&#8217;s disease (AD), also known as senile dementia, is a progressive neurodegenerative disease that can lead to memory loss, cognitive impairment, behavioral disorders, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The protective effect of anthocyanins from the black fruit gland of the Chinese parasol tree on oxidative stress and apoptosis induced by A \u03b2 1-42 in SH-SY5Y cells through the Nrf2 mechanism - 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