{"id":9113,"date":"2024-08-15T18:42:28","date_gmt":"2024-08-15T18:42:28","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=9113"},"modified":"2024-08-15T18:42:28","modified_gmt":"2024-08-15T18:42:28","slug":"longjing-tea","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/hu\/longjing-tea\/","title":{"rendered":"A Longjing tea polifenol kivonat\u00e1nak hat\u00e1sa a m\u00e1j oxidat\u00edv stressz\u00e9re \u00e9s a metabolikus enzimekre C57BL\/6J egerekben"},"content":{"rendered":"<p>A Longjing tea polifenol kivonat\u00e1nak hat\u00e1sa a m\u00e1j oxidat\u00edv stressz\u00e9re \u00e9s a metabolikus enzimekre C57BL\/6J egerekben<br \/>\nA m\u00e1j a szervezet fontos m\u00e9regtelen\u00edt\u0151 szerve, amely r\u00e9szt vesz a cukor-, zs\u00edr- \u00e9s feh\u00e9rje-anyagcsere szab\u00e1lyoz\u00e1s\u00e1ban, valamint az exog\u00e9n anyagok anyagcser\u00e9j\u00e9nek \u00e9s \u00e1talakul\u00e1s\u00e1nak f\u0151 helysz\u00edne. Ez\u00e9rt a m\u00e1jfunkci\u00f3k k\u00e1rosod\u00e1sa, mint p\u00e9ld\u00e1ul a v\u00edrusos m\u00e1jgyullad\u00e1s, az alkoholos zs\u00edrm\u00e1j, a m\u00e1jfibr\u00f3zis, a m\u00e1jzsugor \u00e9s a m\u00e1jr\u00e1k s\u00falyos hat\u00e1ssal lehet a szervezetre. A m\u00e1jban nagysz\u00e1m\u00fa I. \u00e9s II. f\u00e1zis\u00fa gy\u00f3gyszer-metaboliz\u00e1l\u00f3 enzim, valamint k\u00fcl\u00f6nb\u00f6z\u0151 transzportfeh\u00e9rj\u00e9k tal\u00e1lhat\u00f3k. Az I. f\u00e1zis\u00fa gy\u00f3gyszer-metaboliz\u00e1l\u00f3 enzimek f\u0151k\u00e9nt a CYP450 enzimek, amelyek az oxid\u00e1ci\u00f3s, redukci\u00f3s \u00e9s hidrol\u00edzis folyamatok\u00e9rt felel\u0151sek, \u00e9s kataliz\u00e1lhatj\u00e1k a k\u00fcl\u00f6nb\u00f6z\u0151 exog\u00e9n anyagok, p\u00e9ld\u00e1ul gy\u00f3gyszerek, toxinok \u00e9s prekarcinog\u00e9nek metabolizmus\u00e1t. A II. f\u00e1zis\u00fa metabolikus enzimek k\u00f6z\u00e9 els\u0151sorban az UDP gl\u00fckuronozil-transzfer\u00e1z (UGT) \u00e9s a szulfotranszfer\u00e1z (SULT) tartozik, amelyek kataliz\u00e1lj\u00e1k az I. f\u00e1zis\u00fa metabolikus enzimterm\u00e9kek kovalens k\u00f6t\u00e9s\u00e9t gl\u00fckuronsavval, k\u00e9nsavval, glutationnal stb., t\u00f6bb v\u00edzold\u00e9kony term\u00e9ket l\u00e9trehozva, ez\u00e1ltal megk\u00f6nny\u00edtve a metabolikus term\u00e9kek elimin\u00e1ci\u00f3j\u00e1t. Az ATP-k\u00f6t\u0151 kazett\u00e1s transzporter (ABC) f\u0151k\u00e9nt a P-glikoproteint (P-gp) \u00e9s a multidrog-rezisztenci\u00e1val kapcsolatos feh\u00e9rj\u00e9ket (MRP) foglalja mag\u00e1ban, amelyek ugyanahhoz a csal\u00e1dhoz tartoznak, \u00e9s sz\u00e9les k\u00f6rben jelen vannak a k\u00fcl\u00f6nb\u00f6z\u0151 norm\u00e1lis sz\u00f6vetekben \u00e9s szervekben. R\u00e9szt vesznek a gy\u00f3gyszerek \u00e9s a bels\u0151\/k\u00fcls\u0151 anyagok felsz\u00edv\u00f3d\u00e1s\u00e1ban, eloszl\u00e1s\u00e1ban \u00e9s kiv\u00e1laszt\u00e1s\u00e1ban, valamint m\u00e9regtelen\u00edt\u0151 \u00e9s v\u00e9dekez\u00e9sv\u00e9d\u0151 hat\u00e1suk van.<\/p>\n<p>A teak\u00e9sz\u00edt\u00e9si folyamat \u00e1ltal\u00e1ban n\u00e9gy l\u00e9p\u00e9sb\u0151l \u00e1ll: hervaszt\u00e1s, ferment\u00e1ci\u00f3, sodr\u00e1s \u00e9s sz\u00e1r\u00edt\u00e1s. Feldolgoz\u00e1si m\u00f3dja \u00e9s ferment\u00e1ci\u00f3s foka szerint feh\u00e9r te\u00e1ra, s\u00e1rga te\u00e1ra, z\u00f6ld te\u00e1ra, fekete te\u00e1ra, fekete te\u00e1ra \u00e9s z\u00f6ld te\u00e1ra osztj\u00e1k. A tea kiv\u00e1l\u00f3 antioxid\u00e1ns tulajdons\u00e1gokkal rendelkezik, \u00e9s in vivo \u00e9s in vitro is rendelkezik szabadgy\u00f6k-ellenes aktivit\u00e1ssal. A te\u00e1ban l\u00e9v\u0151 fiziol\u00f3giai hat\u00f3anyagok els\u0151sorban a tea polifenolok, bele\u00e9rtve a katechineket, antocianinokat, flavonoidokat stb., amelyek egyben a tea antioxid\u00e1ns aktivit\u00e1s\u00e1nak f\u0151 anyagi alapj\u00e1t is k\u00e9pezik. A z\u00f6ld tea nem ferment\u00e1lt tealevelekre utal, \u00e9s a Longjing z\u00f6ld tea az els\u0151 a n\u00e9gy h\u00edres k\u00ednai tea k\u00f6z\u00fcl, amelyet a \"z\u00f6ld tea kir\u00e1lyn\u0151jek\u00e9nt\" ismernek. A z\u00f6ld te\u00e1ban l\u00e9v\u0151 hat\u00f3anyagok \u00e9lettani funkci\u00f3inak tanulm\u00e1nyoz\u00e1sa az ut\u00f3bbi \u00e9vekben a kutat\u00e1s egyik forr\u00f3 pontj\u00e1v\u00e1 v\u00e1lt.<\/p>\n<p>Csoportunk kor\u00e1bbi kutat\u00e1sai kimutatt\u00e1k, hogy a Longjing tea polifenol-kivonat\u00e1nak szab\u00e1lyoz\u00f3 hat\u00e1sa van a CYP450-re eg\u00e9rm\u00e1jban, de a II. f\u00e1zis\u00fa gy\u00f3gyszer-anyagcsere enzimekre \u00e9s transzporterekre gyakorolt hat\u00e1sa m\u00e9g nem tiszt\u00e1zott. Ez\u00e9rt a kor\u00e1bbi kutat\u00e1sok alapj\u00e1n ez a cikk a Longjing tea polifenol kivonat hat\u00e1s\u00e1t vizsg\u00e1lja a II. f\u00e1zis\u00fa metabolikus enzimek \u00e9s transzporterek expresszi\u00f3j\u00e1ra a C57BL\/6J egerek m\u00e1j\u00e1ban, valamint az oxidat\u00edv stresszel szembeni ellen\u00e1ll\u00f3k\u00e9pess\u00e9g\u00e9t, hogy k\u00eds\u00e9rleti t\u00e1mogat\u00e1st ny\u00fajtson a Longjing tea polifenol kivonat m\u00e9lyrehat\u00f3 fejleszt\u00e9s\u00e9hez \u00e9s felhaszn\u00e1l\u00e1s\u00e1hoz.<\/p>\n<p>Az ALT \u00e9s az AST k\u00e9t fontos mutat\u00f3 a m\u00e1jm\u0171k\u00f6d\u00e9s rendelleness\u00e9g\u00e9nek m\u00e9r\u00e9s\u00e9re. Norm\u00e1lis esetben az ALT \u00e9s az AST f\u0151k\u00e9nt a m\u00e1jban van jelen, \u00e9s a v\u00e9rben rendk\u00edv\u00fcl alacsony a szintj\u00fck. Ha azonban a m\u00e1jm\u0171k\u00f6d\u00e9s rendellenes, az ALT \u00e9s az AST a m\u00e1jb\u00f3l a v\u00e9rbe ker\u00fcl, ami az ALT \u00e9s az AST szintj\u00e9nek \u00e9s aktivit\u00e1s\u00e1nak emelked\u00e9s\u00e9hez vezet a v\u00e9rben. Az ALT \u00e9s AST aktivit\u00e1sv\u00e1ltoz\u00e1sai a sz\u00e9rumban jelezhetik a m\u00e1j eg\u00e9szs\u00e9gi \u00e1llapot\u00e1t. A k\u00eds\u00e9rlet eredm\u00e9nyei azt mutatt\u00e1k, hogy a vak csoporthoz k\u00e9pest 75 mg\/kg Longjing tea polifenol kivonat jelent\u0151sen cs\u00f6kkentette az ALT szintj\u00e9t az eg\u00e9r sz\u00e9rum\u00e1ban, 150 mg\/kg Longjing tea polifenol kivonat jelent\u0151sen n\u00f6velte az AST szintj\u00e9t a sz\u00e9rumban, \u00e9s a t\u00f6bbi d\u00f3ziscsoportban nem volt jelent\u0151s k\u00fcl\u00f6nbs\u00e9g. A klinikai gyakorlatban azonban az AST egyszer\u0171 emelked\u00e9se nem felt\u00e9tlen\u00fcl jelzi a m\u00e1jk\u00e1rosod\u00e1st, ha az ALT norm\u00e1lis, \u00e9s a patol\u00f3giai metszetelemz\u00e9s azt mutatja, hogy a Longjing tea polifenolok nem okoznak k\u00f3ros k\u00e1rosod\u00e1st az egerek m\u00e1j\u00e1ban.<\/p>\n<p>Az emberi sejtek \u00e9s sz\u00f6vetek oxidat\u00edv stressze sz\u00e1mos betegs\u00e9g, p\u00e9ld\u00e1ul a r\u00e1k \u00e9s a sz\u00edv- \u00e9s \u00e9rrendszeri betegs\u00e9gek egyik oka. A szervezet oxidat\u00edv k\u00e1rosod\u00e1st\u00f3l val\u00f3 meg\u00f3v\u00e1sa \u00e9rdek\u00e9ben a sejtek rendelkeznek antioxid\u00e1ns v\u00e9delmi enzimek teljes rendszer\u00e9vel. F\u0151k\u00e9nt a SOD, CAT, GSH, GSH Px, stb. A SOD a szuperoxid-anionokat H2O2-v\u00e9 alak\u00edtja, m\u00edg a GSH Px \u00e9s a CAT a H2O2-t H2O-v\u00e1 kataliz\u00e1lj\u00e1k, ez\u00e1ltal a toxikus szuperoxid-anionokat \u00e9s a H2O2-t nem toxikus H2O-v\u00e1 alak\u00edtj\u00e1k. A tea polifenolok kiv\u00e1l\u00f3 term\u00e9szetes antioxid\u00e1nsok, - OH csoportokban gazdagok, j\u00f3 in vivo \u00e9s in vitro antioxid\u00e1ns aktivit\u00e1ssal, \u00e9s er\u0151s szab\u00e1lyoz\u00f3 hat\u00e1ssal vannak az oxidat\u00edv stresszre. A Longjing tea polifenol kivonata nem volt jelent\u0151s hat\u00e1ssal a SOD aktivit\u00e1sra eg\u00e9r m\u00e1j\u00e1ban, de jelent\u0151sen n\u00f6velni tudta a GSH Px aktivit\u00e1st. 37,5mg\/kg Longjing tea polifenol kivonat szignifik\u00e1nsan n\u00f6velni tudta a CAT aktivit\u00e1st a m\u00e1jban. L\u00e1that\u00f3, hogy a Longjing tea polifenol kivonat n\u00f6velheti az eg\u00e9rm\u00e1j oxidat\u00edv stresszel szembeni ellen\u00e1ll\u00f3 k\u00e9pess\u00e9g\u00e9t a CAT \u00e9s a GSH Px tartalm\u00e1nak szab\u00e1lyoz\u00e1s\u00e1val az eg\u00e9rm\u00e1jban. A GSH eset\u00e9ben a Longjing tea polifenol kivonat d\u00f3zis\u00e1nak n\u00f6veked\u00e9s\u00e9vel cs\u00f6kken a m\u00e1jban l\u00e9v\u0151 tartalma, ami a GSH-nak a Longjing tea polifenolok mint kivonat egy\u00e9b \u00f6sszetev\u0151i \u00e1ltali fogyaszt\u00e1sa miatt lehet.<\/p>\n<p>A CYP450 r\u00e9szt vesz az endog\u00e9n\/exog\u00e9n anyagok, k\u00f6zt\u00fck gy\u00f3gyszerek, k\u00f6rnyezeti vegy\u00fcletek stb. metabolizmus\u00e1ban, \u00e9s jellemz\u0151je, hogy nagy egy\u00e9ni k\u00fcl\u00f6nbs\u00e9geket mutat, valamint \u00e9rz\u00e9keny az exog\u00e9n anyagok hat\u00e1s\u00e1ra. 37,5mg\/kg Longjing tea polifenol kivonat jelent\u0151sen n\u00f6velheti a CYP2E1\/3A11 alt\u00edpusok feh\u00e9rje expresszi\u00f3s szintj\u00e9t eg\u00e9r m\u00e1j\u00e1ban. Alacsony d\u00f3zis\u00fa Longjing tea polifenol kivonat bizonyos indukci\u00f3s hat\u00e1ssal van a CYP450-re. A II. f\u00e1zis\u00fa metabolikus enzimek, az UGT-k \u00e9s a SULT-k f\u0151k\u00e9nt a m\u00e1jban oszlanak el, \u00e9s az endog\u00e9n\/exog\u00e9n anyagokat k\u00f6nnyen kiv\u00e1laszt\u00f3d\u00f3, v\u00edzben old\u00f3d\u00f3 anyagokk\u00e1 metaboliz\u00e1lj\u00e1k. 37,5mg\/kg Longjing tea polifenol kivonat szignifik\u00e1nsan megn\u00f6velte az UGT1A6 \u00e9s SULT1A1 feh\u00e9rje expresszi\u00f3s szintj\u00e9t eg\u00e9r m\u00e1j\u00e1ban, m\u00edg 75 \u00e9s 150 mg\/kg Longjing tea polifenol kivonat nem volt jelent\u0151s hat\u00e1ssal e k\u00e9t enzim expresszi\u00f3j\u00e1ra. Ez azt jelzi, hogy az alacsony d\u00f3zis\u00fa Longjing tea polifenol kivonat bizonyos indukci\u00f3s hat\u00e1ssal van a II. f\u00e1zis\u00fa metabolikus enzimekre. Az MRP2 els\u0151sorban a hum\u00e1n hepatocit\u00e1k baz\u00e1lis membr\u00e1nj\u00e1n oszlik el. Szab\u00e1lyozhatja a hepatocit\u00e1k k\u00e1rosod\u00e1s\u00e1t obstrukt\u00edv s\u00e1rgas\u00e1gban, r\u00e9szt vehet a k\u00fcl\u00f6nb\u00f6z\u0151 toxikus vegy\u00fcletek sejteken bel\u00fcli \u00e9s k\u00edv\u00fcli sz\u00e1ll\u00edt\u00e1s\u00e1ban, szab\u00e1lyozhatja az anyagok sejteken bel\u00fcli \u00fajraeloszt\u00e1s\u00e1t, el\u0151seg\u00edtheti az epe kiv\u00e1laszt\u00e1s\u00e1t \u00e9s n\u00f6velheti az epes\u00f3k zs\u00edrban val\u00f3 oldhat\u00f3s\u00e1g\u00e1t. A 75 \u00e9s 150 mg\/kg Longjing tea polifenol kivonatok jelent\u0151sen n\u00f6velhetik az MRP2 feh\u00e9rje expresszi\u00f3s szintj\u00e9t eg\u00e9r m\u00e1j\u00e1ban, ami potenci\u00e1lis v\u00e9d\u0151hat\u00e1st gyakorolhat a m\u00e1jsejtekre. A P-gp egy gyakori molekul\u00e1ris pumpa, amely v\u00e9di a sejteket a k\u00e1ros idegen molekul\u00e1k behatol\u00e1s\u00e1t\u00f3l. A sejtmembr\u00e1non helyezkedik el, k\u00e9pes gy\u00f3gyszerekhez k\u00f6t\u0151dni, \u00e9s ATP\u00e1z aktivit\u00e1ssal rendelkezik. Az ATP-t lebonthatja az energiaell\u00e1t\u00e1s \u00e9rdek\u00e9ben, kipump\u00e1lhatja a gy\u00f3gyszereket a sejtb\u0151l, cs\u00f6kkentheti a sejtben l\u00e9v\u0151 gy\u00f3gyszerkoncentr\u00e1ci\u00f3t, \u00e9s a sejtekben gy\u00f3gyszerrezisztenci\u00e1t alak\u00edthat ki. A 37,5 \u00e9s 150 mg\/kg Longjing tea polifenol kivonat cs\u00f6kkent\u0151 hat\u00e1st mutatott a P-gp feh\u00e9rje expresszi\u00f3s szintj\u00e9re, m\u00edg a 75 mg\/kg Longjing tea polifenol kivonat nem volt jelent\u0151s hat\u00e1ssal a P-gp feh\u00e9rje expresszi\u00f3s szintj\u00e9re. Ez a Longjing tea polifenolok metabolikus term\u00e9keinek vagy a P-gp-n kereszt\u00fcl t\u00f6rt\u00e9n\u0151 saj\u00e1t kiv\u00e1laszt\u00e1suknak tulajdon\u00edthat\u00f3. A Huang Xixi \u00e9s munkat\u00e1rsai \u00e1ltal k\u00e9sz\u00edtett \u00e1ttekint\u00e9s meger\u0151s\u00edtette, hogy a tea polifenolokban l\u00e9v\u0151 EGCG \u00e9s a gy\u00f3gyszer-metaboliz\u00e1l\u00f3 enzimek \u00e9s transzporterek k\u00f6z\u00f6tt k\u00f6lcs\u00f6nhat\u00e1s van, \u00e9s a specifikus hat\u00e1smechanizmus tov\u00e1bbi meger\u0151s\u00edt\u00e9st ig\u00e9nyel.<\/p>\n<p>A tanulm\u00e1nyb\u00f3l kider\u00fcl, hogy a Longjing tea polifenolok k\u00e9pesek fokozni az oxidat\u00edv v\u00e9delmi rendszer m\u0171k\u00f6d\u00e9s\u00e9t az egerek m\u00e1j\u00e1ban, seg\u00edtve a szervezetet a bels\u0151\/k\u00fcls\u0151 oxidat\u00edv stressznek val\u00f3 ellen\u00e1ll\u00e1sban. Az alacsony d\u00f3zis\u00fa Longjing tea polifenolok bizonyos induk\u00e1l\u00f3 hat\u00e1ssal vannak az I. f\u00e1zis\u00fa metabolikus enzimekre, a II. f\u00e1zis\u00fa metabolikus enzimekre \u00e9s a transzporterekre az egerek m\u00e1j\u00e1ban. Az antioxid\u00e1ns enzimrendszerek, a II. f\u00e1zis\u00fa metabolikus enzimek \u00e9s a transzporterek szab\u00e1lyoz\u00e1sa az Nrf2 Keap1 \u00fatvonalat \u00e9rinti. A CYP450 enzimrendszert az androg\u00e9nreceptor (CAR) \u00e9s a pregn\u00e1n X receptor (PXR) szab\u00e1lyozza, \u00e9s a Longjing tea polifenolok hat\u00e1sa ezekre a lehets\u00e9ges \u00fatvonalakra tov\u00e1bbi vizsg\u00e1latot \u00e9rdemel.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Longjing tea polifenol kivonat\u00e1nak hat\u00e1sa a m\u00e1j oxidat\u00edv stressz\u00e9re \u00e9s a metabolikus enzimekre C57BL\/6J egerekben A m\u00e1j a szervezet fontos m\u00e9regtelen\u00edt\u0151 szerve, amely r\u00e9szt vesz a cukrok, zs\u00edrok \u00e9s feh\u00e9rj\u00e9k metabolizmus\u00e1nak szab\u00e1lyoz\u00e1s\u00e1ban, valamint az exog\u00e9n anyagok metabolizmus\u00e1nak \u00e9s \u00e1talakul\u00e1s\u00e1nak f\u0151 helysz\u00edne. Ez\u00e9rt a m\u00e1jfunkci\u00f3 k\u00e1rosod\u00e1sa, mint p\u00e9ld\u00e1ul [...]<\/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>Effects of Longjing tea polyphenol extract on liver oxidative stress and metabolic enzymes in C57BL\/6J mice - 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\/hu\/longjing-tea\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effects of Longjing tea polyphenol extract on liver oxidative stress and metabolic enzymes in C57BL\/6J mice - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"Effects of Longjing tea polyphenol extract on liver oxidative stress and metabolic enzymes in C57BL\/6J mice The liver is an important detoxification organ in the body, involved in regulating the metabolism of sugars, fats, and proteins, and is also the main site for the metabolism and transformation of exogenous substances. 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