{"id":713,"date":"2012-07-11T07:56:00","date_gmt":"2012-07-11T05:56:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_wonder_of_weightless_worms\/"},"modified":"2026-10-08T00:31:27","modified_gmt":"2026-10-07T22:31:27","slug":"the_wonder_of_weightless_worms","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/the_wonder_of_weightless_worms\/","title":{"rendered":"Det fantastiska med viktl\u00f6sa maskar"},"content":{"rendered":"
\n

M\u00e5nga olika varelser har f\u00f6ljt med astronauterna ut i rymden. Precis som m\u00e4nniskor har de flesta av dem sv\u00e5rt att anpassa sig till tyngdl\u00f6sheten. Ett undantag \u00e4r en liten mask, k\u00e4nd som C. elegans, som verkar klara sig b\u00e4ttre i omloppsbana \u00e4n p\u00e5 jorden.<\/p>\n<\/div>\n

N\u00e4r ESA-astronauten Andr\u00e9 Kuipers f\u00f6r f\u00f6rsta g\u00e5ngen reste till den internationella rymdstationen (ISS) \u00e5r 2004 valdes C. elegans ut att f\u00f6lja med honom. De mikroskopiska maskarna valdes ut eftersom de var den f\u00f6rsta komplexa livsformen vars alla gener (byggstenarna i kroppens celler) hade kartlagts.<\/p>\n

D\u00e4refter uppt\u00e4ckte forskarna att sju av maskarna gener var mindre aktiva i rymden. \u00d6verraskande nog verkade maskarna fungera b\u00e4ttre utan dessa gener. Resultaten tyder p\u00e5 att deras muskler anpassade sig till rymdf\u00f6rh\u00e5llandena. Skulle rymdf\u00e4rder kunna bromsa musklernas \u00e5ldrande?<\/p>\n

\"I>C.
C. elegans<\/i><\/figcaption><\/figure>\n

Laboratorieexperiment bekr\u00e4ftade att \u00e4ven andra maskar som f\u00f6tts upp utan de sju generna levde l\u00e4ngre och hade b\u00e4ttre h\u00e4lsa. Eftersom m\u00e4nniskor delar cirka 55% av sina gener med C. elegans var n\u00e4sta steg att ta reda p\u00e5 hur m\u00e4nniskans muskler reagerar p\u00e5 rymdf\u00e4rder.<\/p>\n

Under sin andra rymdresa till ISS, som avslutades den 1 juli, tog Andr\u00e9 med sig fler maskar f\u00f6r en uppf\u00f6ljningsstudie. Men den h\u00e4r g\u00e5ngen var det \u00e4ven astronauten sj\u00e4lv som blev f\u00f6rem\u00e5l f\u00f6r studien. Innan uppdraget inleddes togs en liten muskelbit fr\u00e5n ett av hans ben och sparades f\u00f6r analys. Forskarna \u00e4r nu ivriga att ta reda p\u00e5 hur detta prov skiljer sig fr\u00e5n de muskler som har tillbringat sex m\u00e5nader i tyngdl\u00f6shet. Till skillnad fr\u00e5n maskarna f\u00e5r Andr\u00e9 dock n\u00e5gra veckor p\u00e5 sig att \u00e5terh\u00e4mta sig fr\u00e5n sin anstr\u00e4ngande resa innan hans muskler hamnar under mikroskopet.<\/p>","protected":false},"excerpt":{"rendered":"

Many different creatures have joined astronauts in space. Like people, most of them find it hard to adapt to weightlessness. One exception is a tiny worm, known as C. elegans, […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2012\/07\/nematode_worm2\/17911232-2-eng-GB\/Nematode_worm.gif","esa_banner_description":"Nematode worm","esa_banner_credit":"Creative Commons ShareAlike license\u2013B. Goldstein","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/07\/Nematode_worm2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,13,63],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-713","post","type-post","status-publish","format-standard","hentry","category-learn","category-life-in-space","category-living-in-space"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/713","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=713"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/713\/revisions"}],"predecessor-version":[{"id":4643,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/713\/revisions\/4643"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=713"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=713"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=713"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=713"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=713"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=713"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=713"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}