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Grelin angl Ghrelin and obestatin prepropeptide bilok yakij koduyetsya genom GHRL roztashovanim u lyudej na korotkomu plechi 3 yi hromosomi 1 Dovzhina polipeptidnogo lancyuga bilka stanovit 117 aminokislot a molekulyarna masa 12 911 2 Z bilka poperednika utvoryuyetsya peptid sho skladayetsya z 28 aminokislot gormon sho stimulyuye vidchuttya golodu viroblyayetsya golovnim chinom klitinami R D1 slizovoyi obolonki fundalnoyi chastini shlunku i epsilon klitinami pidshlunkovoyi zalozi 3 Receptori grelina znahodyatsya u bagatoh tkaninah vklyuchayuchi gipofiz shlunok kishechnik pidshlunkovu zalozu vilochkovu zalozu statevi zalozi shitopodibnu zalozu serce Govard 1996 Nayavnist receptoriv u nastilki riznomanitnih tkaninah i organah govorit pro te sho grelin vikonuye cilij ryad biologichnih funkcij GrelinIdentifikatoriSimvolimotilin related peptideappetite regulating hormonegrowth hormone releasing peptideghrelin 28GHRL 24 51 GSSFLSPEHQRVQQRKESKKPPAKLQPRGastric MLTRPGly Ser Ser Phe Leu Ser Pro Glu His Gln Arg Val Gln Gln Arg Lys Glu Ser Lys Lys Pro Pro Ala Lys Leu Gln Pro ArgZovnishni ID GeneCards 1 OrtologiVidi Lyudina MishaEntrezn d n dEnsembl n d n dUniProt n d n dRefSeq mRNK n dn dRefSeq bilok n dn dLokus UCSC n dn dPubMed search n dn dVikidaniDiv Red dlya lyudejRiven grelinu v krovi zrostaye pered prijomami yizhi i znizhuyetsya pislya nih Vin vvazhayetsya dopovnyuyuchim dlya gormonu leptinu sho viroblyayetsya zhirovoyu tkaninoyu Pri deyakih procedurah z likuvannya ozhirinnya riven grelinu u paciyentiv znizhuyut pri comu vidchuttya sitosti nastaye ranishe nizh za zvichajnih umov 4 Grelin potencijnij stimulyator sekreciyi gormoniv perednoyi doli gipofizu 5 Grelin vplivaye na gipokamp i ye vazhlivim dlya kognitivnoyi adaptaciyi do zmin navkolishnogo seredovisha i dlya procesu navchannya 6 Poslidovnist aminokislot1020304050MPSPGTVCSLLLLGMLWLDLAMAGSSFLSPEHQRVQQRKESKKPPAKLQPRALAGWLRPEDGGQAEGAEDELEVRFNAPFDVGIKLSGVQYQQHSQALGKFLQDILWEEAKEAPADK Zmist 1 Istoriya i nazva 2 Sintez 3 Mehanizm diyi 4 Vidnoshennya do obestatinu 5 Funkciyi 5 1 U travnij sistemi 5 2 U rozvitku legeniv 5 3 U navchanni i pam yati 5 4 Prignichennya viklikane stresom 5 5 Trivalist snu 5 6 Stimulyuvannya apetitu 5 7 Regulyuvannya masi tila 6 Klinichna vazhlivist 7 Vakcina vid ozhirinnya 8 Div takozh 9 Literatura 10 PrimitkiIstoriya i nazva RedaguvatiVidkrittya grelinu bulo zrobleno v 1996 7 vono nalezhit Masayasu Kodzhima ta jogo kolegam yaki dopovili pro ce u 1999 Nazva pohodit vid jogo roli yak peptidu sho vplivaye na vivilnennya gormonu rostu z posilannyam na proto indo yevropejskij korin gre sho oznachaye rosti 8 Growth Hormone Release Inducing GHRelIn toj sho posilyuye vidilennya gormonu rostu Yak kazhe odin z avtoriv doslidzhennya Elison Ren vin stav pershim viyavlenim gormonom ciyeyi grupi Vchenim bulo vidomo sho cya rechovina mozhe stimulyuvati golod u shuriv A pid chas doslidzhennya rezultati yakogo opublikovano u Zhurnali klinichnoyi endokrinologiyi ta metabolizmu vdalosya dovesti sho taki procesi mozhut vidbuvatisya i z lyudmi Dobrovolci yaki otrimuvali in yekciyi grelinu z yidali majzhe na tretinu bilshe nizh ti hto yih ne otrimuvav Sintez RedaguvatiMatrichna RNK z genu GHRL koduye peptid z 117 aminokislot sho nazivayetsya preprogrelin yakij mistit 4 ekzoni Signalna peptidna molekula cogo velikogo poperednika rozsheplyuyetsya vnaslidok chogo otrimuyetsya progrelin Progrelin v svoyu chergu rozsheplyuyetsya na dvi chastini odna z yakih 28 aminokislotnij peptid grelin a druga S grelin z yakogo za pripushennyam utvoryuyetsya obestatin 9 Mehanizm diyi Redaguvati nbsp Shema vplivu grelinu ta inshih gormoniv na vidchuttya goloduGrelin pershij z viznachenih gormoniv sho vplivayut na vidchuttya golodu Grelin takozh yedinij vidomij oreksigen chi gormon sho pidvishuye apetit Vin viroblyayetsya golovnim chinom u tonkomu ta tovstomu kishkivniku ale takozh mozhe vidilyatisya legenyami pankreatichnimi ostrivcyami statevimi zalozami koroyu nadnirnikiv placentoyu nirkami i mozkom Ariyu 2001 Velika kilkist lokacij de mozhe viroblyatisya grelin vkazuye na te sho cej gormon poshirenij i maye bagato biologichnih funkcij Grelin zbilshuye spozhivannya yizhi i zbilshuye zhirovu masu 10 11 diyuchi na rivni gipotalamusu Vin aktivuye klitini v dugopodibnomu yadri 12 13 sho mistit oreksigennij nejropeptid Y u nejronah Ci nejroni takozh chutlivi do leptinu ta insulinu 14 Grelin takozh aktivuye mezolimbichne holinergichno dofaminergichne kilce yake pov yazuye gedonichni ta pidsilyuyuchi aspekti prirodnih zadovolen takih yak yizha a takozh takih narkotichnih rechovin sho prizvodyat do zvikannya napriklad etanolu 14 15 16 Isnuyut takozh dokazi togo sho grelin maye periferichnij efekt na zminu apetitu i vidchuttya sitosti vplivayuchi na mehanichnu chutlivist shlunkovih gilok blukayuchogo nervu roblyachi yih mensh chutlivimi do roztyagnennya shlunku sho prizvodit do pereyidannya Vidnoshennya do obestatinu RedaguvatiObestatin gipotetichnij gormon yakij yak bulo pokazano naprikinci 2005 roku znizhuye apetit Obidva peptidi grelin i obestatin koduyutsya odnim i tim samim genom produkt sintezovanij na cij dilyanci DNK rozpadayetsya takim chinom sho v rezultati utvoryuyutsya dva peptidnih gormoni 17 Fiziologichne znachennya cogo mehanizmu nevidome i slid zaznachiti sho zhodna konvertaza ne maye mozhlivosti rozshepiti rekombinantnij prekursor takim chinom fiziologiya utvorennya cogo peptidu dosi pid pitannyam 18 Funkciyi RedaguvatiU travnij sistemi Redaguvati Vvazhayetsya sho grelin ye gormonom yakij stimulyuye podil klitin kishechnika i prignichuye yih apoptoz pid chas zapalen ta okisnogo stresu 19 20 Vin takozh prignichuye peredzapalni mehanizmi ta zapuskaye protizapalni mehanizmi takim chinom stvoryuyuchi mozhlivist terapevtichnogo vikoristannya pri riznih zapalnih zahvoryuvannyah travnoyi sistemi vklyuchayuchi koliti ishemichni reperfuziyi i sepsis 21 22 Takozh dovedene pidvishennya zdatnosti do regeneraciyi sho ye vazhlivim u vipadku poshkodzhen slizovoyi obolonki shlunku 23 Grelin takozh posilyuye ruhlivist travnogo traktu analogichno do motilinu Grelin takozh jmovirno sprichinyuye poyavu zloyakisnih novoutvoren u travnomu trakti ta pidshlunkovij zalozi 24 25 26 U rozvitku legeniv Redaguvati U zarodkiv grelin viroblyayetsya na rannih stadiyah legenyami i spriyaye rostu 27 U navchanni i pam yati Redaguvati Na modelyah tvarin vidno sho grelin mozhe nadhoditi v gipokamp z krovotoku zminyuyuchi z yednannya nejroniv i takim chinom posilyuyuchi sprijnyattya informaciyi i pam yat Peredbachayetsya sho navchannya najkrashe vidbuvayetsya protyagom dnya koli shlunok porozhnij oskilki v cej chas riven grelinu najbilsh visokij Komanda doslidnikiv Jyelskoyi Shkoli Medicini vidmitila sho podibnij efekt dlya lyudskoyi nejrofiziologiyi cilkom jmovirnij 28 U grizuniv klitini H A takozh viroblyayut grelin 29 Prignichennya viklikane stresom Redaguvati Gormon bere uchast u zahisti vid simptomiv depresiyi viklikanoyi stresom ta trivogoyu 30 Shob pereviriti chi mozhe grelin regulyuvati simptomi depresiyi viklikanoyi hronichnim stresom doslidniki piddavali mishej shodennim socialnim stresam vikoristovuyuchi standartnu laboratornu tehniku yaka zmushuye zvichajnih mishej protistoyati agresivnim misham zabiyakam Bulo viyavleno sho pislya perenesenogo stresu riven grelinu buv suttyevo pidvishenij sho trivalo shonajmenshe chotiri tizhni pislya ostannoyi porazki u podibnij sutichci 31 Trivalist snu Redaguvati Korotka trivalist snu pov yazana z visokimi rivnyami grelinu i nadlishkovoyu vagoyu Isnuye obernena zalezhnist mizh kilkistyu godin snu i koncentraciyeyu grelinu v plazmi krovi zi zbilshennyam godin snu koncentraciya grelinu padaye takim chinom znizhuyuchi apetit ta dopomagayuchi uniknuti mozhlivoyi nadlishkovoyi vagi 32 Stimulyuvannya apetitu Redaguvati Grelin pov yazanij z pidvishennyam apetitu i zi zminoyu harchovoyi povedinki Riven cirkulyuyuchogo grelinu najvishij pered prijomom yizhi Cummings 2004 In yekciyi grelinu i dlya lyudej i dlya pacyukiv zbilshuyut obsyag prijnyatoyi yizhi proporcijno do dozi Wren 2000 Tomu chim bilshe grelinu vvedeno tim bilshe yizhi spozhivayetsya Shopravda grelin ne zbilshuye kilkist yizhi spozhitoyi za raz a kilkist prijomiv yizhi Faulconbridge 2003 In yekciyi grelinu takozh zbilshuyut motivaciyu tvarin do poshuku yizhi spriyayut takim povedinkovim reakciyam yak vinyuhuvannya poshuk yizhi ta yiyi nakopichennya Grelin takozh gotuye tilo do spozhivannya pozhivnih rechovin stimulyuyuchi shlunkovo kishkovu motoriku ta vidilennya kisloti u shlunku Schwartz 2000 Regulyuvannya masi tila Redaguvati Regulyuvannya masi tila zdijsnyuyetsya cherez balans energiyi vidnoshennya kilkosti otrimanoyi z yizheyu energiyi do kilkosti vitrachenoyi energiyi protyagom trivalogo periodu chasu Doslidzhennya pokazali sho riven grelinu maye obernene spivvidnoshennya z masoyu tila Ci dani peredbachayut sho grelin funkcionuye yak signal ozhirinnya zdijsnyuyuchi zv yazok mizh energetichnimi zapasami tila i mozkom Schwartz 2000 Koli osoba vtrachaye vagu riven grelinu v yiyi organizmi zrostaye sho prizvodit do zbilshenogo spozhivannya yizhi i naboru vagi I navpaki koli lyudina nabiraye vagu riven grelinu u yiyi krovi padaye prizvodyachi do zmenshennya spozhivannya yizhi i vtrati vagi Tung 2005 Z cogo viplivaye sho grelin diye yak regulyator vagi tila sho postijno pidtrimuye masu tila i zapasi energiyi u rivnovazi Klinichna vazhlivist RedaguvatiRiven grelinu u plazmi krovi osib z nadmirnoyu vagoyu tila nizhchij nizh u hudishih individiv 4 sho peredbachaye sho grelin ne robit vkladu v zdobuvannya nadlishkovoyi vagi krim vipadkiv ozhirinnya viklikanogo sindromom Prejder Villi za yakogo visoki rivni grelinu korelyuyut z pidvishenim spozhivannyam yizhi 33 34 Ti hto strazhdaye vid takogo porushennya harchovoyi povedinki yak anoreksiya mayut visoki rivni grelinu v plazmi krovi v porivnyanni z osobami sho mayut strunku konstituciyu chi normalnu masu tila 35 Doslidzhennya pokazali sho vnutrishnovenni in yekciyi grelinu paciyentam z anoreksiyeyu zbilshili yih riven spozhivannya yizhi na 12 36 protyagom periodu doslidzhennya 36 Riven grelinu zbilshuyetsya protyagom dobi vid pivnochi do svitanku u strunkishih lyudej sho dozvolyaye pripuskati sho isnuye pevnij zbij u dobovih ritmah individiv z pidvishenoyu masoyu tila 37 Korotka trivalist snu mozhe takozh prizvoditi do nadlishkovoyi masi tila shlyahom zbilshennya apetitu cherez gormonalni zmini 38 Nedostatnij chas snu prizvodit do vidilennya grelinu sho stimulyuye apetit i prizvodit do vidilennya menshoyi kilkosti leptinu yakij pomizh bagatoh inshih efektiv prignichuye apetit Rivni grelinu takozh vishi u paciyentiv yaki mayut viklikanu rakom kaheksiyu 39 Vplivayuchi na svij receptor grelin zbilshuye koncentraciyu dofaminu v chornij substanciyi v dilyanci mozku de dofaminova degeneraciya klitin prizvodit do hvorobi Parkinsona Tomu grelin jmovirno mozhna vikoristuvati dlya spovilnennya rozvitku hvorobi Parkinsona 40 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Commun 309 2 464 8 PMID 12951072 doi 10 1016 j bbrc 2003 08 024 Santos M Bastos P Gonzaga S Roriz JM Baptista MJ Nogueira Silva C Melo Rocha G Henriques Coelho T Roncon Albuquerque R Jr Leite Moreira AF De Krijger RR Tibboel D Rottier R Correia Pinto J 2006 Ghrelin expression in human and rat fetal lungs and the effect of ghrelin administration in nitrofen induced congenital diaphragmatic hernia Pediatr Res 59 4 Pt 1 531 7 PMID 16549524 doi 10 1203 01 pdr 0000202748 66359 a9 Diano S Farr SA Benoit SC McNay EC da Silva I Horvath B Gaskin FS Nonaka N Jaeger LB Banks WA Morley JE Pinto S Sherwin RS Xu L Yamada KA Sleeman MW Tschop MH Horvath TL March 2006 Ghrelin controls hippocampal spine synapse density and memory performance Nat Neurosci 9 3 381 8 PMID 16491079 doi 10 1038 nn1656 Zagalnij oglyad Science Blog Stengel A Tache Y 2012 Ghrelin a pleiotropic hormone secreted from endocrine x a like cells of the stomach Front Neurosci 6 24 PMC 3280431 PMID 22355282 doi 10 3389 fnins 2012 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Licinio J July 2004 Alterations in the dynamics of circulating ghrelin adiponectin and leptin in human obesity Proc Natl Acad Sci U S A 101 28 10434 9 PMC 478601 PMID 15231997 doi 10 1073 pnas 0403465101 Cappuccio FP Taggart FM Kandala NB Currie A Peile E Stranges S Miller MA May 2008 Meta analysis of short sleep duration and obesity in children and adults Sleep 31 5 619 26 PMC 2398753 PMID 18517032 Garcia JM Garcia Touza M Hijazi RA Taffet G Epner D Mann D Smith RG Cunningham GR Marcelli M May 2005 Active ghrelin levels and active to total ghrelin ratio in cancer induced cachexia J Clin Endocrinol Metab 90 5 2920 6 PMID 15713718 doi 10 1210 jc 2004 1788 Andrews ZB Erion D Beiler R Liu ZW Abizaid A Zigman J Elsworth JD Savitt JM DiMarchi R Tschoep M Roth RH Gao XB Horvath TL November 2009 Ghrelin promotes and protects nigrostriatal dopamine function via an UCP2 dependent mitochondrial mechanism J Neurosci 29 45 14057 65 PMC 2845822 PMID 19906954 doi 10 1523 JNEUROSCI 3890 09 2009 Zorrilla EP Iwasaki S Moss JA Chang J Otsuji J Inoue K Meijler MM Janda KD August 2006 Vaccination against weight gain Proc Natl Acad Sci U S A 103 35 13226 31 PMC 1559781 PMID 16891413 doi 10 1073 pnas 0605376103 Scripps edu Zagalnij oglyad The Scripps Research Institute Vizcarra JA Kirby JD Kim SK Galyean ML August 2007 Active immunization against ghrelin decreases weight gain and alters plasma concentrations of growth hormone in growing pigs Domest Anim Endocrinol 33 2 176 89 PMID 16793235 doi 10 1016 j domaniend 2006 05 005 Otrimano z https uk wikipedia org w index php title Grelin amp oldid 39277238