{"id":8097,"date":"2024-08-11T19:07:21","date_gmt":"2024-08-11T19:07:21","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=8097"},"modified":"2024-08-11T19:07:21","modified_gmt":"2024-08-11T19:07:21","slug":"shanzhu","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/da\/shanzhu\/","title":{"rendered":"Unders\u00f8gelse af mekanismen for at fremkalde apoptose i B-lymfom Ramos-celler ved at aktivere ROS\/p38 MAPK\/Bax-kaskadereaktionen med \u03b1-inverteret spinosin"},"content":{"rendered":"<p>B-lymfom er en af de almindelige ondartede tumorer i blodsystemet, og kemoterapi er den vigtigste behandling for B-lymfom. Almindeligt anvendte kliniske l\u00e6gemidler omfatter cyclophosphamid, doxorubicin, vincristin osv. Kemoterapi kan effektivt forbedre overlevelsesraten og prognosen for lymfekr\u00e6ftpatienter, men den har stadig ulemper som h\u00f8j toksicitet, mange bivirkninger og modtagelighed for l\u00e6gemiddelresistens. At finde sikre og effektive l\u00e6gemidler med lav toksicitet fra naturlige produkter er et hotspot inden for forskning i antitumor. Forskere har isoleret og identificeret naturlige forbindelser med anti-lymfomaktivitet fra traditionel kinesisk medicin, der stammer fra planter, mens de har udforsket deres molekyl\u00e6re virkningsmekanismer. For eksempel blev flavonoider som myricetin og baicalein isoleret fra r\u00f8d kardemomme og Scutellaria baicalensis. Det er blevet verificeret, at de to forbindelser ud\u00f8ver anti-lymfom-effekter ved at rette sig mod henholdsvis Bruton tyrosinkinase (BTK) og PI3K\/AKT-signalvejene. Garcinia mangostana L., almindeligvis kendt som bjergbambus, omvendte snoede fr\u00f8 osv., er kendt som \"frugtens dronning\". Mangkhuts frugtskaller indeholder aktive ingredienser som flavonoider, xanthoner, anthocyaniner og proanthocyanidiner. I nogle syd\u00f8stasiatiske regioner bruges de ofte som traditionel medicin til at behandle sygdomme som diarr\u00e9, dysenteri og infektioner. \u03b1-mangostin (\u03b1-Ma) er en antrakinonforbindelse med forskellige biologiske aktiviteter og er en af de vigtigste aktive ingredienser i skallen p\u00e5 mangostanfrugter. Unders\u00f8gelser har vist, at \u03b1-Ma har potentielle anticanceregenskaber og har h\u00e6mmende aktivitet p\u00e5 mavekr\u00e6ft, brystkr\u00e6ft, leverkr\u00e6ft, glioblastom osv. Men den proliferative h\u00e6mmende effekt og molekyl\u00e6re mekanisme af \u03b1-Ma p\u00e5 B-lymfom er endnu ikke blevet rapporteret. Baseret p\u00e5 dette tager denne unders\u00f8gelse humane B-lymfom Ramos-celler som forskningsobjekt, observerer effekten af \u03b1 - Ma p\u00e5 Ramos-celleproliferation og apoptose, sigter mod at udforske den h\u00e6mmende virkning af \u03b1 - Ma p\u00e5 B-lymfomproliferation og dens potentielle molekyl\u00e6re mekanisme, give ny indsigt i antitumoraktiviteten af \u03b1 - Ma og give teoretisk grundlag for modifikation og klinisk anvendelse af \u03b1 - Ma-baserede analoger.<\/p>\n<p>&nbsp;<\/p>\n<p>De umodificerede forbindelser, der er isoleret og udvundet af naturlige produkter, har fordelene ved multi-target, h\u00f8j sikkerhed og bred tilg\u00e6ngelighed, hvilket viser gode fordele i behandlingen af tumorer. If\u00f8lge statistikkerne er omkring 60% af de eksisterende antitumorl\u00e6gemidler naturprodukter eller afledt af naturprodukter som f.eks. paclitaxel og vincristin. Alpha Ma stammer fra naturproduktet mangostan og er blevet rapporteret til at ud\u00f8ve antitumoreffekter gennem forskellige mekanismer. Alpha Ma inducerer apoptose i chondrosarkomceller gennem JNK- og AKT-veje; inducerer apoptose af orale kr\u00e6ftceller gennem ERK- og p38-veje; h\u00e6mning af brystkr\u00e6ftproliferation gennem JNK- og p38-veje; fremmer den kemiske f\u00f8lsomhed af gastriske kr\u00e6ftceller gennem autofagi. I denne unders\u00f8gelse opdagede vi f\u00f8rst den h\u00e6mmende virkning af \u03b1 - Ma p\u00e5 spredningen af B-lymfom Ramos-celler. \u03b1 - Ma h\u00e6mmer spredningen af lymfom Ramos-celler p\u00e5 en l\u00e6gemiddelkoncentration - og tidsafh\u00e6ngig m\u00e5de.<\/p>\n<p>For h\u00f8je niveauer af ROS kan for\u00e5rsage oxidativ skade p\u00e5 kroppens DNA og unormalt proteinudtryk og derved fremkalde celleapoptose. P38MAPK er et vigtigt medlem af MAPK-familien, og aktiveringen af den spiller en afg\u00f8rende rolle i induktionen af kr\u00e6ftcelleapoptose ved hj\u00e6lp af forskellige antitumorl\u00e6gemidler. Forskning har vist, at ROS kan fosforylere og aktivere p38MAPK og derved inducere translokationen af Bcl-2-familiemedlemmet Bax fra cytoplasmaet til den ydre mitokondriemembran. Translokationen af Bax til mitokondriemembranen kan udvide permeabilitetsporen, \u00e6ndre protongradienten i og uden for mitokondrierne, reducere det mitokondrielle transmembranpotentiale og frigive pro-apoptotiske stoffer (s\u00e5som AIF og Cyt-c). Efter at v\u00e6re blevet frigivet i cytoplasmaet interagerer Cyt-c med den apoptotiske enzymaktiveringsfaktor (Apaf-1) og danner et apoptotisk kompleks med hj\u00e6lp fra ATP og dATP. Det apoptotiske kompleks rekrutterer og aktiverer pro-caspase-9, som yderligere aktiverer caspase-3\/7, igangs\u00e6tter caspase-kaskade-reaktionen, spalter substrater som PARP og i sidste ende inducerer celleapoptose. Som et andet medlem af Bcl-2-familien fremmer Bim aktivering af Bax gennem b\u00e5de direkte binding og konkurrencedygtig binding. Vores forskningsresultater viste, at \u03b1-Ma kan \u00f8ge ROS-niveauerne i Ramos-celler, reducere MMP og opregulere udtrykket af p-p38, Bax og Bim, aktivere caspase-3\/9 og PARP og fremkalde apoptose i Ramos-celler.<\/p>\n<p>Baseret p\u00e5 ovenst\u00e5ende resultater spekulerer vi i, at den mulige mekanisme, hvormed \u03b1 - Ma h\u00e6mmer spredningen af lymfom Ramos-celler, er aktiveringen af ROS\/p38 MAPK\/Bax-kaskadereaktionen af \u03b1 - Ma, som inducerer apoptose i B-lymfomceller. Unders\u00f8gelsen belyste anti-lymfomaktiviteten og den mulige mekanisme for \u03b1-Ma og gav nye ideer til udvikling af antitumorl\u00e6gemidler baseret p\u00e5 \u03b1-Ma.<\/p>","protected":false},"excerpt":{"rendered":"<p>B lymphoma is one of the common malignant tumors in the blood system, and chemotherapy is the main treatment for B lymphoma. Commonly used clinical drugs include cyclophosphamide, doxorubicin, vincristine, etc. Chemotherapy can effectively improve the survival rate and prognosis of lymphoma patients, but it still has drawbacks such as high toxicity, high side effects, [&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>Study on the mechanism of inducing apoptosis in B lymphoma Ramos cells by activating the ROS\/p38 MAPK\/Bax cascade reaction with \u03b1 - inverted spinosin - China Chemical Manufacturer<\/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:\/\/longchangextracts.com\/da\/shanzhu\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Study on the mechanism of inducing apoptosis in B lymphoma Ramos cells by activating the ROS\/p38 MAPK\/Bax cascade reaction with \u03b1 - inverted spinosin - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"B lymphoma is one of the common malignant tumors in the blood system, and chemotherapy is the main treatment for B lymphoma. 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