{"id":114132,"date":"2014-11-13T18:12:39","date_gmt":"2014-11-13T18:12:39","guid":{"rendered":"https:\/\/bm.dev.synology.me\/?p=114132"},"modified":"2014-11-13T18:12:39","modified_gmt":"2014-11-13T18:12:39","slug":"studiu-variatiile-genetice-responsabile-pentru-longevitatea-extrema-inexistente","status":"publish","type":"post","link":"https:\/\/bm.dev.synology.me\/?p=114132","title":{"rendered":"STUDIU: Varia\u0163iile genetice responsabile pentru longevitatea extrem\u0103, inexistente"},"content":{"rendered":"<p>\n<strong>Secven\u0163ierea genomului a 17 persoane aflate \u00eentre cele mai longevive din lume a e\u015fuat \u00een \u00eencercarea de a g\u0103si varia\u0163iile genetice specifice legate de longevitatea extrem\u0103.<\/strong><\/p>\n<p>\n\u00cen prezent, exist\u0103 74 de persoane pe glob, recunoscute oficial, a c\u0103ror v\u00e2rst\u0103 dep\u0103\u015feste 110 de ani.<\/p>\n<p>\nAutorii studiului condus de Hinco Gierman, de la Univesitatea Stanford din California, au efectuat secven\u0163ierea complet\u0103 a genomului a 17 dintre aceste persoane foarte b\u0103tr\u00e2ne pentru a \u00eencerca s\u0103 afle secretele genetice ale acestei longevit\u0103\u0163i de invidiat.<\/p>\n<p>\n<strong>Dar, pornind de la acest mic e\u015fantion, savan\u0163ii nu au g\u0103sit varia\u0163ii genetice rare responsabile de producerea unor proteine care ar fi putut explica longevitatea, potrivit cercet\u0103rii publicate \u00een revista PLOS ONE.<\/strong><\/p>\n<p>\nPe de alt\u0103 parte, oamenii de \u015ftiin\u0163\u0103 au descoperit \u00een cazul acestor persoane o muta\u0163ie genetic\u0103 legat\u0103 de patologii cardiace, dar care, \u00een cazul lor, efectele acestei muta\u0163ii nu s-au produs deloc sau doar \u00een foarte mic\u0103 m\u0103sur\u0103.<\/p>\n<p>\nChiar dac\u0103 studiul nu a permis o cunoa\u015ftere mai profund\u0103 a mecanismelor biologice care permit o longevitate excep\u0163ional\u0103, autorii au f\u0103cut publice secven\u0163ierile genomurilor pentru a fi utilizate \u00een cercet\u0103ri ulterioare.<\/p>\n<p>\n<strong>Sc\u0103derea natalit\u0103\u0163ii \u015fi cre\u015fterea speran\u0163ei de via\u0163\u0103 face ca popula\u0163ia american\u0103 s\u0103 \u00eemb\u0103tr\u00e2neasc\u0103 rapid.<\/strong><\/p>\n<p>\nPotrivit datelor Biroului de recens\u0103m\u00e2nt, un american din cinci va avea peste 65 de ani, p\u00e2n\u0103 \u00een 2050, \u015fi cel pu\u0163in 400.000 vor avea peste 100 de ani.<\/p>\n<p>\n<strong>Medicina s-ar putea dezvolta \u00eentra-at\u00e2t \u00een deceniile urm\u0103toare, \u00eenc\u00e2t ar putea permite stoparea, dac\u0103 nu chiar inversarea procesului de \u00eemb\u0103tr\u00e2nire, cresc\u00e2nd limita longevit\u0103\u0163ii, potrivit unor cercet\u0103tori.<\/strong><\/p>\n<p>\nLaboratoare private \u015fi universit\u0103\u0163i desf\u0103\u015foar\u0103 \u00een prezent cercet\u0103ri care vizeaz\u0103 descoperirea unei f\u00e2nt\u00e2ni a tinere\u0163ii, iar responsabili religio\u015fi, filosofi \u015fi exper\u0163i \u00een domeniul bio-eticii dezbat implica\u0163iile sociale \u015fi morale ale unei astfel de cre\u015fteri a duratei de via\u0163\u0103, a relevat, \u00een 2013, o anchet\u0103 realizat\u0103 de Pew Research Center, un organism de cercetare independent, cu sediul la Washington.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Secven\u0163ierea genomului unora dintre cele mai longevive persoane din lume a e\u015fuat \u00een identificarea unor posibile varia\u0163ii genetice care s\u0103 fie legate de longevitatea extrem\u0103, potrivit unui studiu publicat miercuri.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[14357,26662,7853],"class_list":["post-114132","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-genetica","tag-longevitate","tag-studiu"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/114132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=114132"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/114132\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=114132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=114132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=114132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}