{"id":196563,"date":"2026-06-05T21:29:35","date_gmt":"2026-06-05T21:29:35","guid":{"rendered":"https:\/\/www.europesays.com\/ee\/196563\/"},"modified":"2026-06-05T21:29:35","modified_gmt":"2026-06-05T21:29:35","slug":"suvamerehai-geeniuuring-paljastas-ulima-pikaealisuse-saladusi-loodus","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ee\/196563\/","title":{"rendered":"S\u00fcvamerehai geeniuuring paljastas \u00fclima pikaealisuse saladusi | Loodus"},"content":{"rendered":"

Atlandi ookeani p\u00f5hjaosa ja P\u00f5hja-J\u00e4\u00e4mere s\u00fcgavais vetes ujub aeglaselt ringi salap\u00e4raseid suuri haikalu, atlandi polaarhaisid, kelle genoomi on teadlased n\u00fc\u00fcd p\u00f5hjalikult uurinud.<\/p>\n

Atlandi polaarhaid elavad kaua, arvatavasti kauem kui \u00fckski teine selgroogne loom maailmas, kindlasti v\u00e4hemalt 200 aastat, aga v\u00f5ib-olla ka \u00fcle 500 aasta.<\/p>\n

Palju pole selle liigi kohta teada, sest ta elupaik on nii ligip\u00e4\u00e4smatu.<\/p>\n

<\/p>\n

Shigeharu Kinoshita Jaapanist Tokyo \u00dclikoolist ja ta kolleegid on n\u00fc\u00fcd l\u00e4bi vaadanud ligi 97 protsenti atlandi polaarhai genoomist ehk ligi kuus miljardit DNA aluspaari ja saanud muu hulgas uut aimu ta pikaealisuse geneetilise tagap\u00f5hja kohta.<\/p>\n

Nad kirjutavad Ameerika \u00dchendriikide teadusakadeemia toimetistes<\/a>, et tuvastasid mitu geneetilist ise\u00e4rasust, mis neil kaladel nii k\u00f5rgesse ikka j\u00f5uda aitavad.<\/p>\n

\u00dcks t\u00e4helepanuv\u00e4\u00e4rsemaid erip\u00e4rasid iseloomustab rakutuumas leiduvat v\u00e4ikest valgumolekuli, mis aitab \u00f5igesti koos hoida DNA ja valkude keerukat kompleksi kromatiini.<\/p>\n

Teadlased v\u00e4idavad, et m\u00f5ned aminohapete asendused selles valgus v\u00f5ivad aidata hoida kromatiini stabiilsena ja v\u00e4hendada vananemisega kaasnevaid kahjustusi.<\/p>\n

Veel m\u00e4rkasid teadlased, et \u00fchest rakusiseste rauavarude talletamist korraldavast geenist on atlandi polaarhail tervelt 59 eksemplari, rohkem kui teistel haidel. See geen on seotud ka rauast s\u00f5ltuva programmeeritud rakusurma ehk ferroptoosiga.<\/p>\n

Teadlased arvavad, et selle geeni nii suur arvukus v\u00f5imaldab hail oma rakke paremini oks\u00fcdatiivse stressi eest kaitsta.<\/p>\n

Ka immuuns\u00fcsteemi ja DNA kahjustuste k\u00f5rvaldamisega tegelevate geenide juures leidsid teadlased pikaealisust soodustada v\u00f5ivaid ise\u00e4rasusi.<\/p>\n

Teadlased loodavad, et saadud teadmised aitavad organismide vananemist ka \u00fcldisemalt paremini m\u00f5ista ja v\u00f5ivad kunagi p\u00e4rast edasisi uuringuid hakata kasu tooma ka inimeste tervishoius.<\/p>\n

Teadusuudised on Vikerraadios eetris esmasp\u00e4evast reedeni ca kell 8.35 ja laup\u00e4eval ca kell 8.25.<\/p>\n","protected":false},"excerpt":{"rendered":"Atlandi ookeani p\u00f5hjaosa ja P\u00f5hja-J\u00e4\u00e4mere s\u00fcgavais vetes ujub aeglaselt ringi salap\u00e4raseid suuri haikalu, atlandi polaarhaisid, kelle genoomi on…\n","protected":false},"author":2,"featured_media":196564,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[18],"tags":[37,33,35,34,36,7513,43334,1496,159,158],"class_list":["post-196563","post","type-post","status-publish","format-standard","has-post-thumbnail","category-sport","tag-ee","tag-eesti","tag-eesti-keel","tag-estonia","tag-estonian","tag-genoom","tag-hai","tag-pikaealisus","tag-sport","tag-sports"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ee\/116699631690843544","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/196563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/comments?post=196563"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/196563\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media\/196564"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media?parent=196563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/categories?post=196563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/tags?post=196563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}