{"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\/fi\/the_wonder_of_weightless_worms\/","title":{"rendered":"Painottomien matojen ihme"},"content":{"rendered":"
\n

Avaruudessa on ollut mukana monia erilaisia olentoja astronauttien seurana. Ihmisten tavoin useimmilla niist\u00e4 on vaikeuksia sopeutua painottomuuteen. Yksi poikkeus on pieni mato, nimelt\u00e4\u00e4n C. elegans, joka n\u00e4ytt\u00e4\u00e4 p\u00e4rj\u00e4\u00e4v\u00e4n kiertoradalla paremmin kuin maapallolla.<\/p>\n<\/div>\n

Kun ESA:n astronautti Andr\u00e9 Kuipers matkusti ensimm\u00e4ist\u00e4 kertaa Kansainv\u00e4liselle avaruusasemalle (ISS) vuonna 2004, C. elegans valittiin mukaan. N\u00e4m\u00e4 mikroskooppisen pienet madot valittiin, koska ne olivat ensimm\u00e4inen monimutkainen el\u00e4m\u00e4nmuoto, jonka kaikki geenit (kehon solujen rakennuspalikat) oli kartoitettu.<\/p>\n

My\u00f6hemmin tutkijat havaitsivat, ett\u00e4 seitsem\u00e4n matojen geeneist\u00e4 oli avaruudessa v\u00e4hemm\u00e4n aktiivisia. Yll\u00e4tt\u00e4en matot n\u00e4yttiv\u00e4t toimivan paremmin ilman niit\u00e4. Tulokset viittasivat siihen, ett\u00e4 niiden lihakset sopeutuivat avaruuden olosuhteisiin. Voisiko avaruuslento hidastaa lihasten ik\u00e4\u00e4ntymisprosessia?<\/p>\n

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

Laboratoriokokeet vahvistivat, ett\u00e4 my\u00f6s muut madot, joita oli kasvatettu ilman n\u00e4it\u00e4 seitsem\u00e4\u00e4 geeni\u00e4, eliv\u00e4t pidemp\u00e4\u00e4n ja terveempin\u00e4. Koska ihmisill\u00e4 on noin 55% yhteisi\u00e4 geenej\u00e4 C. elegansin kanssa, seuraava askel oli selvitt\u00e4\u00e4, miten ihmisen lihakset reagoivat avaruuslentoon.<\/p>\n

Toisella ISS-avaruusasemalla suorittamallaan teht\u00e4v\u00e4ll\u00e4, joka p\u00e4\u00e4ttyi 1. hein\u00e4kuuta, Andr\u00e9 kuljetti mukanaan lis\u00e4\u00e4 matoja jatkotutkimusta varten. T\u00e4ll\u00e4 kertaa kuitenkin my\u00f6s astronauttia itse\u00e4\u00e4n tutkittiin. Ennen teht\u00e4v\u00e4n alkua h\u00e4nen toisesta jalastaan otettiin pieni lihaskappale, joka s\u00e4ilytettiin analysointia varten. Tutkijat odottavat nyt innokkaasti, miten t\u00e4m\u00e4 n\u00e4yte eroaa lihaksista, jotka ovat viett\u00e4neet kuusi kuukautta painottomuudessa. Toisin kuin matojen kohdalla, Andr\u00e9 saa kuitenkin muutaman viikon aikaa toipua v\u00e4sytt\u00e4v\u00e4st\u00e4 matkastaan, ennen kuin h\u00e4nen lihaksensa p\u00e4\u00e4sev\u00e4t mikroskoopin alle.<\/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\/fi\/wp-json\/wp\/v2\/posts\/713","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=713"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/713\/revisions"}],"predecessor-version":[{"id":4643,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/713\/revisions\/4643"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=713"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=713"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=713"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=713"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=713"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=713"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=713"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}