{"id":4237,"date":"2023-03-05T20:25:28","date_gmt":"2023-03-05T20:25:28","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=4237"},"modified":"2023-03-05T20:25:28","modified_gmt":"2023-03-05T20:25:28","slug":"astronaut-health-unraveling-spaceflight-effects-human-body","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/space-exploration\/astronaut-health-unraveling-spaceflight-effects-human-body\/","title":{"rendered":"Zdrav\u00ed astronaut\u016f ve vesm\u00edru: Studie dvoj\u010dat odhalila \u00fa\u010dinky na lidsk\u00e9 t\u011blo"},"content":{"rendered":"

Zdrav\u00ed astronaut\u016f: Odhalen\u00ed \u00fa\u010dink\u016f kosmick\u00fdch let\u016f na lidsk\u00e9 t\u011blo<\/h2>\n\n

Studie dvoj\u010dat: Okno do dopad\u016f kosmick\u00fdch let\u016f<\/h2>\n\n

Pr\u016flomov\u00fd v\u00fdzkumn\u00fd projekt NASA, studie dvoj\u010dat, srovn\u00e1val astronauta Scotta Kellyho s jeho identick\u00fdm dvoj\u010detem Markem, kter\u00fd z\u016fstal na Zemi. C\u00edlem bylo pochopit \u00fa\u010dinky ro\u010dn\u00ed vesm\u00edrn\u00e9 mise na lidsk\u00e9 t\u011blo.<\/p>\n\n

Telomery: Str\u00e1\u017eci DNA<\/h2>\n\n

Telomery, ochrann\u00e9 \u010depi\u010dky na \u0159et\u011bzc\u00edch DNA, hraj\u00ed z\u00e1sadn\u00ed roli ve st\u00e1rnut\u00ed. V\u011bdci pozorovali p\u0159ekvapiv\u00fd n\u00e1r\u016fst d\u00e9lky telomer b\u011bhem Scottova vesm\u00edrn\u00e9ho letu, co\u017e nazna\u010duje, \u017ee vesm\u00edrn\u00e9 podm\u00ednky mohly zpomalit jejich zkracov\u00e1n\u00ed. Po jeho n\u00e1vratu na Zemi v\u0161ak do\u0161lo ke zkr\u00e1cen\u00ed telomer, co\u017e vyvol\u00e1v\u00e1 obavy ohledn\u011b potenci\u00e1ln\u00edch souvislost\u00ed se st\u00e1rnut\u00edm a nemocemi.<\/p>\n\n

Exprese gen\u016f: P\u0159izp\u016fsoben\u00ed se nov\u00e9 hranici<\/h2>\n\n

Kosmick\u00e9 lety tak\u00e9 ovlivnily expresi gen\u016f. V\u011bdci zjistili zm\u011bny v aktivit\u011b gen\u016f, zejm\u00e9na v druh\u00e9 polovin\u011b Scottovy mise. Tyto zm\u011bny nazna\u010duj\u00ed, \u017ee se t\u011blo i nad\u00e1le p\u0159izp\u016fsobuje b\u011bhem dlouh\u00fdch pobyt\u016f ve vesm\u00edru.<\/p>\n\n

Epigenetika: Chemick\u00e9 zna\u010dky p\u0159izp\u016fsoben\u00ed<\/h2>\n\n

Epigenetick\u00e9 modifikace, chemick\u00e9 zna\u010dky, kter\u00e9 reguluj\u00ed expresi gen\u016f, vykazovaly podobn\u00e9 zm\u011bny jak u Scotta, tak u Marka. Scott\u016fv genom v\u0161ak vykazoval ur\u010dit\u00e9 jedine\u010dn\u00e9 modifikace, kter\u00e9 se po jeho n\u00e1vratu na Zemi vr\u00e1tily k v\u00fdchoz\u00edmu stavu, co\u017e nazna\u010duje schopnost t\u011bla zotavit se z kosmick\u00fdch let\u016f.<\/p>\n\n

Kognitivn\u00ed v\u00fdkon: Pokles po letu<\/h2>\n\n

Studie Scottov\u00fdch kognitivn\u00edch schopnost\u00ed odhalila pokles v\u00fdkonu po jeho n\u00e1vratu na Zemi. Tento n\u00e1lez zd\u016fraz\u0148uje potenci\u00e1ln\u00ed rizika kognitivn\u00edho posti\u017een\u00ed astronaut\u016f na dlouhodob\u00fdch mis\u00edch, kde mohou b\u00fdt pot\u0159eba prov\u00e1d\u011bt slo\u017eit\u00e9 \u00fakoly.<\/p>\n\n

Mikrobiom: St\u0159evn\u00ed bakterie ve vesm\u00edru<\/h2>\n\n

Mikrobiom, spole\u010denstv\u00ed bakteri\u00ed ve st\u0159ev\u011b, tak\u00e9 pro\u0161el zm\u011bnami b\u011bhem Scottova vesm\u00edrn\u00e9ho letu. Celkov\u00e1 diverzita v\u0161ak z\u016fstala nedot\u010dena, co\u017e nazna\u010duje, \u017ee mikrobiom z\u016fstal zdrav\u00fd.<\/p>\n\n

Zm\u011bny protein\u016f: Indikace restrukturalizace t\u011bla<\/h2>\n\n

V\u011bdci pozorovali zm\u011bny v hladin\u00e1ch protein\u016f b\u011bhem kosmick\u00e9ho letu, v\u010detn\u011b zv\u00fd\u0161en\u00e9 hladiny kolagenu, struktur\u00e1ln\u00edho proteinu. Tyto zm\u011bny mohou nazna\u010dovat, \u017ee t\u011blo pro\u0161lo restrukturalizac\u00ed, aby se p\u0159izp\u016fsobilo jedine\u010dn\u00e9mu prost\u0159ed\u00ed vesm\u00edru.<\/p>\n\n

Odolnost a adaptace: S\u00edla t\u011bla<\/h2>\n\n

Navzdory pozorovan\u00fdm zm\u011bn\u00e1m v\u011bt\u0161ina z nich zmizela, jakmile se Scott vr\u00e1til na Zemi. To dokazuje pozoruhodnou odolnost a p\u0159izp\u016fsobivost lidsk\u00e9ho t\u011bla v\u016f\u010di extr\u00e9mn\u00edm prost\u0159ed\u00edm.<\/p>\n\n

Cesta vp\u0159ed: Odemknut\u00ed tajemstv\u00ed vesm\u00edru<\/h2>\n\n

Studie dvoj\u010dat poskytuje cenn\u00e9 poznatky o biologick\u00fdch \u00fa\u010dinc\u00edch kosmick\u00fdch let\u016f. NASA pl\u00e1nuje pokra\u010dovat ve sledov\u00e1n\u00ed astronaut\u016f a prov\u00e1d\u011bt analogov\u00e9 studie na Zemi, aby d\u00e1le porozum\u011bla t\u011bmto \u00fa\u010dink\u016fm a vyvinula strategie ke zm\u00edrn\u011bn\u00ed rizik pro budouc\u00ed dlouhodob\u00e9 mise.<\/p>\n\n

Odpov\u011bdi na ot\u00e1zky a vznik dal\u0161\u00edch<\/h2>\n\n

Jako ka\u017ed\u00fd v\u011bdeck\u00fd po\u010din, i studie dvoj\u010dat vyvolala nov\u00e9 ot\u00e1zky. V\u011bdci d\u00e1le zkoumaj\u00ed mechanismy stoj\u00edc\u00edch za pozorovan\u00fdmi zm\u011bnami a sna\u017e\u00ed se z\u00edskat hlub\u0161\u00ed porozum\u011bn\u00ed reakc\u00ed lidsk\u00e9ho t\u011bla na vesm\u00edr.<\/p>\n\n

Perspektiva astronauta: Cesta objev\u016f<\/h2>\n\n

Scott Kelly, astronaut, kter\u00fd je \u00fast\u0159edn\u00ed postavou studie dvoj\u010dat, si uv\u011bdomuje d\u016fle\u017eitost pokra\u010duj\u00edc\u00edho v\u00fdzkumu. Nad\u00e1le se zavazuje p\u0159isp\u00edvat k rozvoji lidsk\u00fdch znalost\u00ed prost\u0159ednictv\u00edm sv\u00e9 vlastn\u00ed \u00fa\u010dasti na dlouhodob\u00e9m monitorov\u00e1n\u00ed zdrav\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"

Zdrav\u00ed astronaut\u016f: Odhalen\u00ed \u00fa\u010dink\u016f kosmick\u00fdch let\u016f na lidsk\u00e9 t\u011blo Studie dvoj\u010dat: Okno do dopad\u016f kosmick\u00fdch let\u016f Pr\u016flomov\u00fd v\u00fdzkumn\u00fd projekt NASA, studie dvoj\u010dat, srovn\u00e1val astronauta Scotta Kellyho s jeho identick\u00fdm dvoj\u010detem…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[494],"tags":[740,4116,493,2307,7753],"class_list":["post-4237","post","type-post","status-publish","format-standard","hentry","category-space-exploration","tag-biology","tag-physiology","tag-spaceflight","tag-human-body","tag-astronaut-health"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/4237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=4237"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/4237\/revisions"}],"predecessor-version":[{"id":4238,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/4237\/revisions\/4238"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=4237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=4237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=4237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}