{"id":20787,"date":"2022-06-03T09:29:35","date_gmt":"2022-06-03T09:29:35","guid":{"rendered":"https:\/\/test.otpor.media\/index.php\/2022\/06\/03\/https-otpor-media-americki-znanstvenik-tvrdi-vjerujemo-da-smo-pronasli-glavni-kontrolni-prekidac-starenja\/"},"modified":"2022-06-03T09:29:35","modified_gmt":"2022-06-03T09:29:35","slug":"https-otpor-media-americki-znanstvenik-tvrdi-vjerujemo-da-smo-pronasli-glavni-kontrolni-prekidac-starenja","status":"publish","type":"post","link":"https:\/\/otpor.media\/?p=20787","title":{"rendered":"Ameri\u010dki znanstvenik tvrdi: &#8220;Vjerujemo da smo prona\u0161li glavni kontrolni prekida\u010d starenja&#8221;"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">U laboratoriju molekularnog biologa Davida Sinclaira, u sklopu Medicinske \u0161kole Harvard, stari mi\u0161evi ponovno se pomla\u0111uju.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Koriste\u0107i proteine \u200b\u200bkoji odraslu stanicu mogu pretvoriti u mati\u010dnu stanicu, Sinclair i njegov tim vratili su starenje stanica kod mi\u0161eva na njihove ranije verzije. U prvom napretku njegovog tima, objavljenom jo\u0161 krajem 2020. godine, stari mi\u0161evi sa slabim vidom i o\u0161te\u0107enom mre\u017enicom odjednom su mogli ponovno vidjeti, s vidom koji je ponekad bio konkurentan njihovom potomstvu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kad su ti mi\u0161evi uginuli nekih \u0161est mjeseci kasnije, i dalje su imali dobar vid, rekao je Sinclair publici na Life Itself, doga\u0111aju o zdravlju i dobrobiti predstavljenom u partnerstvu sa CNN-om.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To je trajno resetiranje, koliko mo\u017eemo re\u0107i, i mislimo da bi to mogao biti univerzalni proces koji bi se mogao primijeniti na cijelo tijelo kako bi se vratilo na\u0161e doba, rekao je Sinclair, koji je proveo posljednjih 20 godina prou\u010davaju\u0107i na\u010dine za preokretanje zuba vremena.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Danas imamo tehnologiju s kojom se mo\u017ee do\u017eivjeti stote godine \u017eivota bez brige da \u0107ete dobiti rak u 70-ima, sr\u010dane bolesti u 80-ima i Alzheimerovu bolest u 90-ima. Ovo je svijet koji dolazi. Doslovno je pitanje kada i za ve\u0107inu nas \u0107e se to dogoditi u na\u0161im \u017eivotima, rekao je Sinclair sudionicima spomenutog doga\u0111aja.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Njegovo istra\u017eivanje pokazuje da mo\u017eete promijeniti starenje kako biste \u017eivote u\u010dinili du\u017ee mla\u0111im. Sada \u017eeli promijeniti svijet i u\u010diniti starenje bole\u0161\u0107u, rekla je poslovna an\u0111elica Whitney Casey, koja u partnerstvu sa Sinclairom stvara &#8220;uradi sam&#8221; test biolo\u0161ke dobi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Iako se moderna medicina bavi bole\u0161\u0107u, ona ne rje\u0161ava temeljni uzrok, koji je za ve\u0107inu bolesti samo starenje, rekao je Sinclair. Znamo da kada preokrenemo starost organa kao \u0161to je mozak kod mi\u0161a, bolesti starenja tada nestaju. Sje\u0107anje se vra\u0107a; nema vi\u0161e demencije. Vjerujem da \u0107e u budu\u0107nosti odga\u0111anje i preokretanje starenja biti najbolji na\u010din za lije\u010denje bolesti koje mu\u010de ve\u0107inu nas, nagla\u0161ava Sinclair.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Yamanaka faktori<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U Sinclairovu laboratoriju dva mi\u0161a sjede jedan pored drugog. Jedan je slika mladosti, a drugi star i slaba\u0161an. Ipak, oni su brat i sestra, ro\u0111eni iz istog legla, samo je jedan genetski promijenjen da br\u017ee stari.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ako je to mogu\u0107e, pitao je Sinclair svoj tim, mo\u017ee li se posti\u0107i i obrnuto? Japanski biomedicinski istra\u017eiva\u010d dr. Shinya Yamanaka ve\u0107 je reprogramirao ljudske stanice ko\u017ee odraslih da se pona\u0161aju kao embrionalne ili pluripotentne mati\u010dne stanice, sposobne razviti se u bilo koju stanicu u tijelu. Otkri\u0107e 2007. godine znanstveniku je donijelo Nobelovu nagradu, a njegove inducirane pluripotentne mati\u010dne stanice ubrzo su postale poznate kao &#8220;Yamanaka faktori&#8221;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Me\u0111utim, odrasle stanice koje su se u potpunosti vratile na mati\u010dne stanice putem Yamanaka faktora gube svoj identitet. Zaboravljaju da su stanice krvi, srca i ko\u017ee, \u0161to ih \u010dini savr\u0161enima za ponovno ro\u0111enje kao cell du jour, ali lo\u0161ima za pomla\u0111ivanje. Ne \u017eelite da Brad Pitt u &#8220;Zanimljivom slu\u010daju Benjamina Buttona&#8221; odjednom postane beba; \u017eeli\u0161 da stari unatrag dok se jo\u0161 uvijek sje\u0107a tko je.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Lo\u0161a strana Yamanaka faktora<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Laboratoriji diljem svijeta bacili su se na rje\u0161avanje tog problema. Studija koju su 2016. objavili istra\u017eiva\u010di sa Salk instituta za biolo\u0161ke studije u La Jolli u Kaliforniji, pokazala je da se znakovi starenja mogu ukloniti kod genetski ostarjelih mi\u0161eva, koji su bili izlo\u017eeni na kratko vrijeme \u010detiri glavna faktora Yamanake, bez brisanja identiteta stanica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ali u svim tim istra\u017eivanjima postojala je i lo\u0161a strana: u odre\u0111enim situacijama, promijenjeni mi\u0161evi su razvili kancerogene tumore.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Virus i antibiotik kao alati<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tra\u017ee\u0107i sigurniju alternativu, Sinclairov laboratorijski geneti\u010dar Yuancheng Lu odabrao je tri od \u010detiri faktora i genetski ih dodao bezopasnom virusu. Virus je osmi\u0161ljen kako bi isporu\u010dio pomla\u0111uju\u0107e faktore Yamanake u o\u0161te\u0107ene ganglijske stanice retine na stra\u017enjoj strani oka ostarjelog mi\u0161a. Nakon ubrizgavanja virusa u oko, pluripotentni geni su zatim uklju\u010deni hranjenjem mi\u0161a antibiotikom.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Antibiotik je samo alat. To bi zapravo mogla biti bilo koja kemikalija, samo na\u010din da se osigura da su tri gena uklju\u010dena. Obi\u010dno su uklju\u010deni samo kod vrlo mladih embrija u razvoju, a zatim se gase kako starimo, pojasnio je Sinclair.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nevjerojatno, o\u0161te\u0107eni neuroni u o\u010dima mi\u0161eva kojima su ubrizgane tri stanice su pomla\u0111eni, \u010dak su rasli i novi aksoni ili projekcije iz oka u mozak. Od te izvorne studije, Sinclair je rekao da je njegov laboratorij preokrenuo starenje mi\u0161i\u0107a i mozga mi\u0161eva te sada radi na pomla\u0111ivanju cijelog mi\u0161eva tijela.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Stanice na neki na\u010din znaju da se tijelo mo\u017ee resetirati, a jo\u0161 uvijek znaju koji bi geni trebali biti uklju\u010deni kada su bili mladi, rekao je Sinclair.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>&#8220;Vjerujemo da smo prona\u0161li glavni kontrolni prekida\u010d starenja&#8221;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mislimo da koristimo drevni sustav regeneracije koji neke \u017eivotinje koriste &#8211; kada odsije\u010dete ud salamandru, on ponovo izraste. Riblji rep \u0107e ponovno narasti; mi\u0161ji prst \u0107e ponovno izrasti, poja\u0161njava. To otkri\u0107e ukazuje da postoji &#8220;pri\u010duvna kopija&#8221; informacija o mladosti pohranjena u tijelu, dodao je.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ja to nazivam informacijskom teorijom starenja. To je gubitak informacija koji tjera starenje stanice da zaborave kako funkcionirati, da zaborave koja su vrsta stanice. Sada mo\u017eemo uklju\u010diti prekida\u010d za resetiranje koji obnavlja sposobnost stanice da ponovno ispravno \u010dita genom, kao da je mlada, ka\u017ee Sinclair.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Iako promjene traju mjesecima kod mi\u0161eva, obnovljene stanice se ne ostaju smrznute u vremenu. To je trajno koliko i starenje. To je resetiranje, a onda vidimo kako mi\u0161evi ponovno stare, pa samo ponavljamo proces, poja\u0161njava Sinclair.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vjerujemo da smo prona\u0161li glavni kontrolni prekida\u010d, na\u010din da vratimo vrijeme unazad. Tijelo \u0107e se tada probuditi, zapamtiti kako se pona\u0161ati, zapamtiti kako se regenerirati i ponovno \u0107e biti mlado, \u010dak i ako ste ve\u0107 stari i imate bolest, dodaje.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Znanost ve\u0107 zna kako usporiti ljudsko starenje<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Studije o tome ho\u0107e li genetska intervencija kojom su revitalizirani mi\u0161evi u\u010diniti isto za ljude u ranoj su fazi, rekao je Sinclair. Pro\u0107i \u0107e godine prije nego \u0161to pokusi na ljudima budu gotovi, analizirani i, ako su sigurni i uspje\u0161ni, dovedeni do mase potrebne za slu\u017ebeni pe\u010dat odobrenja.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dok \u010dekamo da znanost utvrdi mo\u017eemo li i mi resetirati svoje gene, postoji mnogo drugih na\u010dina da usporimo proces starenja i resetiramo na\u0161e biolo\u0161ke satove, rekao je Sinclair.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Uzimanje genetske sudbine u vlastite ruke<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Najva\u017eniji savjeti su jednostavni: usredoto\u010dite se na biljke za hranu, jedite rje\u0111e, dovoljno spavajte, tri puta tjedno vje\u017ebajte kako biste odr\u017eali mi\u0161i\u0107nu masu, nemojte se zamarati sitnicama i okru\u017eite se dobrim dru\u0161tvom, rekao je Sinclair.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sva ta pona\u0161anja utje\u010du na na\u0161 epigenom, proteine \u200b\u200bi kemikalije koje sjede poput pjegica na svakom genu, \u010dekaju\u0107i da ka\u017eu genu &#8220;\u0161to treba u\u010diniti, gdje to u\u010diniti i kada to u\u010diniti&#8221;, prema podacima ameri\u010dkog Nacionalnog instituta za istra\u017eivanje ljudskog genoma. Epigenom doslovno uklju\u010duje i isklju\u010duje gene.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0160to kontrolira epigenom? Ljudsko pona\u0161anje i njegova okolina igraju klju\u010dnu ulogu. Recimo da ste ro\u0111eni s genetskom predispozicijom za sr\u010dane bolesti i dijabetes. Ali budu\u0107i da ste vje\u017ebali, jeli prehranu usmjerenu na biljke, dobro spavali i upravljali svojim stresom tijekom ve\u0107eg dijela svog \u017eivota, mogu\u0107e je da se ti geni nikada ne bi aktivirali. Tako, ka\u017eu stru\u010dnjaci, mo\u017eemo uzeti dio na\u0161e genetske sudbine u svoje ruke.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-color has-text-color wp-block-paragraph\"><strong>Starenje i prehrana<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dobro je dokumentiran pozitivan utjecaj na na\u0161e zdravlje biljne prehrane, bliskih, ljubavnih odnosa i adekvatnog vje\u017ebanja i sna. Ograni\u010denje kalorija, me\u0111utim, kontroverzniji je na\u010din dodavanja godina \u017eivotu, ka\u017eu stru\u010dnjaci.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Smanjenje unosa hrane, bez izazivanja pothranjenosti, znanstveno je poznat na\u010din produljenja \u017eivota ve\u0107 gotovo jedno stolje\u0107e. Studije na crvima, rakovima, pu\u017eevima, vo\u0107nim mu\u0161icama i glodavcima otkrile su da ograni\u010davanje kalorija &#8220;odga\u0111a pojavu poreme\u0107aja povezanih sa starenjem&#8221; kao \u0161to su rak, bolesti srca i dijabetes, prema Nacionalnom institutu za starenje. Neke studije su tako\u0111er prona\u0161le produljenje \u017eivotnog vijeka: u studiji iz 1986., mi\u0161evi su hranili samo tre\u0107inu dnevnih kalorija do\u017eivjeli su 53 mjeseca, a mi\u0161 koji se dr\u017ei kao ku\u0107ni ljubimac mogao bi do\u017eivjeti oko 24 mjeseca.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Studije na ljudima, me\u0111utim, bile su manje prosvjetljuju\u0107e, dijelom zato \u0161to su se mnoge usredoto\u010dile na gubitak te\u017eine umjesto na dugovje\u010dnost. Za Sinclaira je, me\u0111utim, smanjenje obroka bilo zna\u010dajan \u010dimbenik u ponovnom postavljanju njegovog osobnog sata: nedavni testovi pokazuju da ima biolo\u0161ku dob od 42 godine u tijelu ro\u0111enom prije 53 godine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Radim biolo\u0161ki test ve\u0107 10 godina, a zadnje desetlje\u0107e sam sve mla\u0111i, rekao je Sinclair. Najve\u0107a promjena u mom biolo\u0161kom satu dogodila se kada sam rje\u0111e jeo &#8211; sada jedem samo jedan obrok dnevno. To je napravilo najve\u0107u razliku u mojoj biokemiji.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/edition.cnn.com\/2022\/06\/02\/health\/reverse-aging-life-itself-scn-wellness\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cnn.com<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>U laboratoriju molekularnog biologa Davida Sinclaira, u sklopu Medicinske \u0161kole Harvard, stari mi\u0161evi ponovno se pomla\u0111uju. Koriste\u0107i proteine \u200b\u200bkoji odraslu stanicu mogu pretvoriti u mati\u010dnu stanicu, Sinclair i njegov tim vratili su starenje stanica kod mi\u0161eva na njihove ranije verzije. U prvom napretku njegovog tima, objavljenom jo\u0161 krajem 2020. godine, stari mi\u0161evi sa slabim vidom [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11342,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[163],"tags":[],"class_list":["post-20787","post","type-post","status-publish","format-standard","has-post-thumbnail","category-revolucijska-znanost"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ameri\u010dki znanstvenik tvrdi: &quot;Vjerujemo da smo prona\u0161li glavni kontrolni prekida\u010d starenja&quot; - OTPOR.Media<\/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:\/\/otpor.media\/?p=20787\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ameri\u010dki znanstvenik tvrdi: &quot;Vjerujemo da smo prona\u0161li glavni kontrolni prekida\u010d starenja&quot;\" \/>\n<meta property=\"og:description\" content=\"U laboratoriju molekularnog biologa Davida Sinclaira, u sklopu Medicinske \u0161kole Harvard, stari mi\u0161evi ponovno se pomla\u0111uju. Koriste\u0107i proteine \u200b\u200bkoji odraslu stanicu mogu pretvoriti u mati\u010dnu stanicu, Sinclair i njegov tim vratili su starenje stanica kod mi\u0161eva na njihove ranije verzije. 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