{"id":1157,"date":"2023-10-31T00:50:16","date_gmt":"2023-10-30T23:50:16","guid":{"rendered":"https:\/\/www.cestypsychotroniky.cz\/?p=1157"},"modified":"2023-12-23T02:54:22","modified_gmt":"2023-12-23T01:54:22","slug":"v-lidskych-srdcich-jsou-stopy-atomovych-vybuchu","status":"publish","type":"post","link":"https:\/\/www.cestypsychotroniky.cz\/index.php\/2023\/10\/31\/v-lidskych-srdcich-jsou-stopy-atomovych-vybuchu\/","title":{"rendered":"V lidsk\u00fdch srdc\u00edch jsou stopy atomov\u00fdch v\u00fdbuch\u016f"},"content":{"rendered":"

Zkou\u0161ky v atmosf\u00e9\u0159e pomohly dok\u00e1zat, \u017ee \u017eivouc\u00ed „\u010derpadla“, pumpuj\u00edc\u00ed krev, sama obnovuj\u00ed po\u0161kozenou tk\u00e1\u0148.<\/strong><\/p>\n

P\u0159ed n\u011bkolika lety byla p\u0159ijata domn\u011bnka, \u017ee nervov\u00e9 bu\u0148ky se, bohu\u017eel, neobnovuj\u00ed. A \u017ee u \u010dlov\u011bka je jich tolik, kolik jich m\u00e1 od narozen\u00ed. Ani s v\u011bkem \u017e\u00e1dn\u00e9 nep\u0159ib\u00fdvaj\u00ed, ale naopak – nervov\u00e9 bu\u0148ky nevratn\u011b um\u00edraj\u00ed.<\/p>\n

\"\"<\/p>\n

Uk\u00e1zalo se v\u0161ak, \u017ee tomu tak nen\u00ed. A nov\u00e9 neurony se mohou vyskytnout i b\u011bhem cel\u00e9ho \u017eivota.<\/p>\n

Stejn\u011b tak se uva\u017eovalo, \u017ee i srdce nen\u00ed schopn\u00e9 regenerace. Tuto p\u0159etrv\u00e1vaj\u00edc\u00ed mylnou p\u0159edstavu vyvr\u00e1til l\u00e9ka\u0159 Ratan Bhardwai z university v kanadsk\u00e9m Torontu a zjistil, \u017ee v srdci dosp\u011bl\u00e9ho \u010dlov\u011bka rostou nov\u00e9 bu\u0148ky. Toto zji\u0161t\u011bn\u00ed publikoval s kolegy v seri\u00f3zn\u00edm v\u011bdeck\u00e9m \u010dasopise Science. (1)<\/p>\n

K tomuto zji\u0161t\u011bn\u00ed pomohly v\u00fdzkumn\u00edk\u016fm jadern\u00e9 pokusy v atmosf\u00e9\u0159e, kter\u00e9 byly provedeny v 50. letech minul\u00e9ho stolet\u00ed. Tehdy siln\u011b zamo\u0159ily prost\u0159ed\u00ed radioaktivn\u00edm izotopem \u2013 uhl\u00edkem C14. A jeho \u00farove\u0148 klesla pot\u00e9, co v roce 1963 do\u0161lo k z\u00e1kazu v\u00fdbuch\u016f atomov\u00fdch bomb v atmosf\u00e9\u0159e.<\/p>\n

\"\"<\/p>\n

Radioaktivn\u00ed izotopy pomohly nastavit \u010das, kdy\u017e se u \u010dlov\u011bka objev\u00ed nov\u00e9 srde\u010dn\u00ed bu\u0148ky<\/p>\n

Srde\u010dn\u00ed bu\u0148ky lid\u00ed, kte\u0159\u00ed za\u017eili nadzemn\u00ed jadern\u00fd v\u00fdbuch, „nas\u00e1ly“ do sebe izotop C14 ve vysok\u00fdch koncentrac\u00edch. Toho v\u011bdci vyu\u017eili k takzvan\u00e9mu radioaktivn\u00edmu datov\u00e1n\u00ed \u017eiv\u00fdch tk\u00e1n\u00ed. Uhl\u00edk C14 m\u00e1 mo\u017enost ur\u010dit st\u00e1\u0159\u00ed bun\u011bk.<\/p>\n

A uk\u00e1zalo se, \u017ee srde\u010dn\u00ed bu\u0148ky se objevuj\u00ed v r\u016fzn\u00fdch \u010dasech. To znamen\u00e1, \u017ee spolu se star\u00fdmi se rod\u00ed i nov\u00e9 bu\u0148ky.<\/p>\n

Podle odhad\u016f Ratana Bhardwaie<\/em> a jeho koleg\u016f, srdce 25 let\u00e9ho \u010dlov\u011bka je schopno produkovat bu\u0148ky v a\u017e do 1 procenta t\u011blesn\u00e9 hmotnosti. Do 75 roku v\u011bku v\u00fdkonnost t\u00e9to „tov\u00e1rny“ klesne na 0,45 procenta.<\/p>\n

V\u011bdci se domn\u00edvaj\u00ed, \u017ee po objeven\u00ed schopnosti dosp\u011bl\u00e9ho srdce k regeneraci mohou b\u00fdt vyvinuty nov\u00e9 metody k rehabilitaci osob se srde\u010dn\u00edm infarktem.<\/p>\n

Je mo\u017en\u00e9, \u017ee budou vyvinuty l\u00e9ky na podporu vzniku nov\u00fdch bun\u011bk. A budou u\u017eite\u010dn\u00e9 i pro prevenci.<\/p>\n

Pokud se poda\u0159\u00ed stupe\u0148 regenerace zv\u00fd\u0161it alespo\u0148 na 2 procenta ro\u010dn\u011b, pak za 50 let v\u011bku bude mo\u017en\u00e9 prakticky obnovit cel\u00e9 srdce.<\/p>\n

Odkazy<\/em><\/strong><\/p>\n

(1) Kirsty L. Spalding, Ratan D. Bhardwaj, Bruce A. Buchholz, Henrik Druid, Jonas Fris: Retrospective Birth Dating of Cells in Humans. Cell, Vol 122, 133-143, 15 July 2005. Internet: https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/16009139<\/a><\/em><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Zkou\u0161ky v atmosf\u00e9\u0159e pomohly dok\u00e1zat, \u017ee \u017eivouc\u00ed „\u010derpadla“, pumpuj\u00edc\u00ed krev, sama obnovuj\u00ed po\u0161kozenou tk\u00e1\u0148.<\/p>\n","protected":false},"author":1,"featured_media":1017,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,12],"tags":[60,51],"class_list":["post-1157","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-souvislosti","category-zdravi-2","tag-clovek","tag-zdravi"],"_links":{"self":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/1157","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=1157"}],"version-history":[{"count":1,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/1157\/revisions"}],"predecessor-version":[{"id":1160,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/posts\/1157\/revisions\/1160"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/media\/1017"}],"wp:attachment":[{"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/media?parent=1157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/categories?post=1157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cestypsychotroniky.cz\/index.php\/wp-json\/wp\/v2\/tags?post=1157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}