{"id":930,"date":"2023-10-09T00:31:47","date_gmt":"2023-10-08T22:31:47","guid":{"rendered":"https:\/\/www.cestypsychotroniky.cz\/?p=930"},"modified":"2023-11-14T00:34:43","modified_gmt":"2023-11-13T23:34:43","slug":"je-radiace-zdrava","status":"publish","type":"post","link":"https:\/\/www.cestypsychotroniky.cz\/index.php\/2023\/10\/09\/je-radiace-zdrava\/","title":{"rendered":"Je radiace zdrav\u00e1?"},"content":{"rendered":"<p><strong>V\u011bdci dok\u00e1zali, \u017ee n\u00edzk\u00e9 d\u00e1vky z\u00e1\u0159en\u00ed prodlu\u017euj\u00ed \u017eivot<\/strong><!--more--><br \/>\nD\u0159\u00edve ve v\u011bd\u011b i v obecn\u00e9m pov\u011bdom\u00ed p\u0159eva\u017eoval n\u00e1zor, \u017ee jak\u00e1koli m\u00edra z\u00e1\u0159en\u00ed, kter\u00e1 je odli\u0161n\u00e1 od p\u0159irozen\u00e9 radiace pozad\u00ed, je \u0161kodliv\u00e1 pro lidsk\u00e9 t\u011blo. Tak\u00e9, \u017ee dokonce i minim\u00e1ln\u00ed vystaven\u00ed sv\u00e9ho t\u011bla tomuto z\u00e1\u0159en\u00ed spou\u0161t\u00ed rakovinu. Nicm\u00e9n\u011b, v\u011bdci se opakovan\u011b setkali s p\u0159\u00edpady, kter\u00e9 absolutn\u011b tyto z\u00e1v\u011bry pop\u0159ely.<\/p>\n<p><strong>Na p\u0159edm\u011bst\u00ed Hiro\u0161imy i Nagasaki je mnoho dlouholet\u00fdch<\/strong><\/p>\n<p>Nejv\u00fdrazn\u011bj\u0161\u00edm p\u0159\u00edkladem byla ud\u00e1lost z roku 1982 na Thajwanu. Na skl\u00e1dku kovov\u00e9ho odpadu se dostal radioaktivn\u00ed kobalt 60. Brzy byl v\u0161echen kov ze skl\u00e1dky roztaven a pou\u017eit na v\u00fdrobu ocelov\u00fdch konstrukc\u00ed pro v\u00fdstavbu bytov\u00fdch dom\u016f. T\u011bchto byt\u016f bylo postaveno 1700. \u017de st\u011bny vyza\u0159uj\u00ed, si lid\u00e9 v\u0161imli a\u017e po 20 letech. Celou tu dobu bylo zhruba 10 tis\u00edc lid\u00ed vystaveno z\u00e1\u0159en\u00ed asi 1000 kr\u00e1t vy\u0161\u0161\u00edmu, ne\u017e je p\u0159irozen\u00e9 pozad\u00ed!<\/p>\n<p>Pot\u00e9, co pravda vy\u0161la najevo, l\u00e9ka\u0159i provedli rozs\u00e1hl\u00fd zdravotn\u00ed pr\u016fzkum lid\u00ed v rizikov\u00e9 skupin\u011b. K p\u0159ekvapen\u00ed l\u00e9ka\u0159\u016f byl po\u010det lid\u00ed s rakovinou mezi t\u011bmito 10 tis\u00edci lidmi v\u00fdrazn\u011b ni\u017e\u0161\u00ed, ne\u017e byl celost\u00e1tn\u00ed pr\u016fm\u011br.<\/p>\n<p>Rozs\u00e1hl\u00fd materi\u00e1l k v\u00fdzkumu dali v\u011bdc\u016fm ti, kdo p\u0159e\u017eili bombardov\u00e1n\u00ed Hiro\u0161imy a Nagasaki. Celkov\u00fd po\u010det usmrcen\u00fdch b\u011bhem jadern\u00fdch v\u00fdbuch\u016f byl 140 tis\u00edc, resp. 80 tis\u00edc lid\u00ed. Nicm\u00e9n\u011b, l\u00e9ka\u0159i si v\u0161imli, \u017ee obyvatel\u00e9 na p\u0159edm\u011bst\u00ed, kte\u0159\u00ed byli vystaveni oz\u00e1\u0159en\u00ed v mal\u00fdch d\u00e1vk\u00e1ch, prok\u00e1zali vy\u0161\u0161\u00ed \u00farove\u0148 zdrav\u00ed a do\u017e\u00edvaj\u00ed se vy\u0161\u0161\u00edho v\u011bku.<\/p>\n<p>Zaj\u00edmav\u00e9 \u00fadaje poskytla i katastrofa v \u010cernobylu. P\u0159i odstran\u011bn\u00ed n\u00e1sledk\u016f nehody p\u016fsobilo asi 200 tis\u00edc lid\u00ed. Nicm\u00e9n\u011b studie proveden\u00e9 rusk\u00fdm n\u00e1rodn\u00edm radioaktivn\u00edm a epidemiologick\u00fdm registrem, prok\u00e1zaly, \u017ee za n\u00e1sleduj\u00edc\u00edch 13 let bylo mezi likvid\u00e1tory hav\u00e1rie registrov\u00e1no pouze 48 (!) p\u0159\u00edpad\u016f leuk\u00e9mie. Auto\u0159i studie u\u010dinili paradoxn\u00ed z\u00e1v\u011br: vystaven\u00ed se z\u00e1\u0159en\u00ed zmen\u0161ilo u t\u011bchto lid\u00ed \u00famrtnost na tuto nemoc!<\/p>\n<p>Je mo\u017en\u00e9, aby slab\u00e9 d\u00e1vky radiace prodlu\u017eovaly \u017eivot? Touto ot\u00e1zkou se zab\u00fdv\u00e1 skupina v\u011bdc\u016f z Laborato\u0159e genetiky st\u00e1rnut\u00ed a dlouhov\u011bkosti (MFTI), \u00dastavu molekul\u00e1rn\u00ed biologie RAV, stejn\u011b jako v\u011bdeck\u00e9ho centra RAV v Komi a Univerzit\u011b v Syktyvkaru.<\/p>\n<p>V\u00fdzkum byl proveden na mouch\u00e1ch (octomilky). Experiment\u00e1ln\u00ed skupina 2000 much obdr\u017eela r\u016fzn\u00e9 d\u00e1vky z\u00e1\u0159en\u00ed, od 0,05 do 0,4 Gray. Pro \u010dlov\u011bka je d\u00e1vka 4 Gray smrt\u00edc\u00ed, a 0,05 Gray je maxim\u00e1ln\u00ed povolen\u00e1 p\u0159i pr\u00e1ci s radiac\u00ed. Ale snesiteln\u00fd pr\u00e1h pro mouchy je mnohem vy\u0161\u0161\u00ed.<\/p>\n<p><em>\u201eZ v\u00fdsledk\u016f na\u0161ich studi\u00ed vypl\u00fdv\u00e1, \u017ee pr\u016fm\u011brn\u00e1 d\u00e9lka \u017eivota se prodlou\u017eila u oz\u00e1\u0159en\u00fdch octomilek,\u201c <\/em>\u0159\u00edk\u00e1 jedna z autor\u016f v\u00fdzkumu <em>Sv\u011btlana \u017dikrivetsk\u00e1. \u201eKrom\u011b toho, u sami\u010dek byl efekt v\u00fdrazn\u011bj\u0161\u00ed. Prodlou\u017een\u00ed \u017eivota se u nich zv\u00fd\u0161ilo o 7,6% a u samc\u016f pouze o 3,4%.\u201c<\/em><\/p>\n<p>Vzhledem k tomu, \u017ee pr\u016fm\u011brn\u00fd v\u011bk octomilek nep\u0159ekro\u010d\u00ed dva m\u011bs\u00edce, do\u0161lo k v\u00fdrazn\u00e9mu prodlou\u017een\u00ed \u017eivota &#8211; o t\u00fdden. Krom\u011b toho, oz\u00e1\u0159en\u00e9 mouchy l\u00e9pe sn\u00e1\u0161ej\u00ed nep\u0159\u00edzniv\u00e9 podm\u00ednky prost\u0159ed\u00ed, jako je nap\u0159\u00edklad zv\u00fd\u0161en\u00ed teploty&#8230; (1)<\/p>\n<p>Nyn\u00ed je jasn\u00e9, \u017ee i takov\u00e9 stresov\u00e9 faktory, jako jsou jedy a z\u00e1\u0159en\u00ed, mohou skute\u010dn\u011b stimulovat lidsk\u00fd organismus. Ale ne\u017e se p\u0159ikro\u010d\u00ed k praktick\u00e9mu vyu\u017eit\u00ed t\u011bchto poznatk\u016f, mus\u00ed v\u011bdci pochopit a poznat je\u0161t\u011b mnoh\u00e9 z fungov\u00e1n\u00ed genetick\u00e9ho mechanismu. K prodlou\u017een\u00ed \u017eivota nelze pou\u017e\u00edvat jen jeden n\u00e1stroj, ne\u017e jen radiaci.<\/p>\n<p><strong><em>Odkazy<\/em><\/strong><\/p>\n<p><em>(1) Zhikrevetskaya S, Peregudova D, Danilov A, Plyusnina E, Krasnov G, Dmitriev A, et al. (2015) Effect of Low Doses (5-40 cGy) of Gamma-irradiation on Lifespan and Stress-related Genes Expression Profile in Drosophila melanogaster. PLoS ONE 10(8): e0133840.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u011bdci dok\u00e1zali, \u017ee n\u00edzk\u00e9 d\u00e1vky z\u00e1\u0159en\u00ed prodlu\u017euj\u00ed \u017eivot<\/p>\n","protected":false},"author":1,"featured_media":260,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[60,51],"class_list":["post-930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nezarazene","tag-clovek","tag-zdravi"],"_links":{"self":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/comments?post=930"}],"version-history":[{"count":1,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/930\/revisions"}],"predecessor-version":[{"id":931,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/930\/revisions\/931"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/media\/260"}],"wp:attachment":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/media?parent=930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/categories?post=930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/tags?post=930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}