{"id":100326,"date":"2026-02-24T00:21:37","date_gmt":"2026-02-23T23:21:37","guid":{"rendered":"https:\/\/www.infokuryr.cz\/n\/?p=100326"},"modified":"2026-02-23T16:40:23","modified_gmt":"2026-02-23T15:40:23","slug":"soucasne-experimenty-s-ptaci-chripkou-smrtelne-davky-poskozeni-mozku-stonasobna-virova-naloz-co-bylo-doopravdy-vytvoreno","status":"publish","type":"post","link":"https:\/\/www.infokuryr.cz\/n\/2026\/02\/24\/soucasne-experimenty-s-ptaci-chripkou-smrtelne-davky-poskozeni-mozku-stonasobna-virova-naloz-co-bylo-doopravdy-vytvoreno\/","title":{"rendered":"Sou\u010dasn\u00e9 experimenty s pta\u010d\u00ed ch\u0159ipkou: Smrteln\u00e9 d\u00e1vky, po\u0161kozen\u00ed mozku, ston\u00e1sobn\u00e1 virov\u00e1 n\u00e1lo\u017e \u2013 Co bylo doopravdy vytvo\u0159eno?"},"content":{"rendered":"
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Experimenty NIH s pta\u010d\u00ed ch\u0159ipkou vytv\u00e1\u0159ej\u00ed smrteln\u00fd virus se zv\u00fd\u0161enou virulenc\u00ed a mutacemi p\u0159enosnosti u savc\u016f.<\/span><\/strong><\/p>\n

Experimenty se ziskem funkce vedly k mutac\u00edm H5N1 adaptovan\u00fdm na savce.<\/span><\/p>\n

V\u011bdci financovan\u00ed NIH tvrd\u00ed, \u017ee provedli experimenty s pta\u010d\u00ed ch\u0159ipkou, p\u0159i kter\u00fdch infikovali savce vysoce patogenn\u00edm a smrteln\u00fdm virem H5N1. B\u011bhem t\u011bchto experiment\u016f se populace viru u zv\u00ed\u0159at posunula sm\u011brem k mutac\u00edm, o nich\u017e je zn\u00e1mo, \u017ee zvy\u0161uj\u00ed replikaci viru, virulenci a p\u0159enosnost u savc\u016f.<\/span><\/p>\n

Studie byla\u00a0<\/span>publikov\u00e1na minul\u00fd t\u00fdden v \u010dasopise Nature Communications.<\/span><\/a><\/p>\n

Jeden z autor\u016f studie, Dr. Jeffery Taubenberger, je v sou\u010dasnosti \u0159editelem NIAID a je jmenov\u00e1n vyn\u00e1lezcem celost\u00e1tn\u011b patentovan\u00e9 platformy vakc\u00edny proti pta\u010d\u00ed ch\u0159ipce. To mu umo\u017e\u0148uje \u00fa\u010dastnit se experiment\u016f s virem H5N1 schopn\u00fdm vyvolat pandemii a z\u00e1rove\u0148 vlastnit pr\u00e1va du\u0161evn\u00edho vlastnictv\u00ed k vakc\u00edn\u011b vyvinut\u00e9 k boji proti n\u011bmu.<\/span><\/p>\n

Studie byla financov\u00e1na N\u00e1rodn\u00edm institutem pro alergie a infek\u010dn\u00ed nemoci (NIAID), N\u00e1rodn\u00edmi instituty zdrav\u00ed (NIH) a Ministerstvem zdravotnictv\u00ed a soci\u00e1ln\u00edch slu\u017eeb USA (HHS) na z\u00e1klad\u011b smlouvy 75N93021C00016.<\/span><\/p>\n

Zahrnovala infekci my\u0161\u00ed let\u00e1ln\u00edmi d\u00e1vkami viru ch\u0159ipky H5N1 a anal\u00fdzu toho, jak se virus replikoval a vyv\u00edjel v sav\u010d\u00edch hostitel\u00edch.<\/span><\/p>\n

Infekce byly u nel\u00e9\u010den\u00fdch zv\u00ed\u0159at smrteln\u00e9:<\/span><\/p>\n

\u201eKontroln\u00ed my\u0161i (nel\u00e9\u010den\u00e9) … v\u0161echny podlehly infekci mezi 5. a 8. dnem po inokulaci.\u201c<\/span><\/em><\/p>\n

P\u0159edpokl\u00e1d\u00e1 se, \u017ee jak se virus replikoval, roz\u0161\u00ed\u0159il se z plic do mozku a dos\u00e1hl extr\u00e9mn\u011b vysok\u00fdch koncentrac\u00ed:<\/span><\/p>\n

„Titry v mozku se zv\u00fd\u0161ily z 10\u00b2 na 10\u2077 TCID50\/ml mezi 3 a 6 dpi.“<\/span><\/em><\/p>\n

Tato neurologick\u00e1 invaze vedla k viditeln\u00fdm neurologick\u00fdm poruch\u00e1m:<\/span><\/p>\n

\u201eV\u00edce ne\u017e 60 % kontroln\u00edch zv\u00ed\u0159at \u2026 vykazovalo neurologick\u00e9 p\u0159\u00edznaky, v\u010detn\u011b par\u00e9zy zadn\u00edch nohou, ataxie a t\u0159esu.\u201c<\/span><\/em><\/p>\n

V\u011bdci potvrdili, \u017ee se virus roz\u0161\u00ed\u0159il po cel\u00e9m t\u011ble:<\/span><\/p>\n

\u201eV plic\u00edch se vytvo\u0159ila produktivn\u00ed infekce virem A(H5N1)… a rychle se roz\u0161\u00ed\u0159ila do mozku.\u201c<\/span><\/em><\/p>\n

B\u011bhem experiment\u016f se virus posunul sm\u011brem k mutac\u00edm adaptivn\u00edm na savce.<\/span><\/p>\n

Genetick\u00e9 sekvenov\u00e1n\u00ed \u00fadajn\u011b uk\u00e1zalo, \u017ee b\u011bhem experiment\u016f se populace vir\u016f u savc\u016f posunula sm\u011brem k variant\u00e1m nesouc\u00edm mutace spojen\u00e9 se zlep\u0161enou adaptac\u00ed na sav\u010d\u00ed hostitele.<\/span><\/p>\n

Jednou z nejd\u016fle\u017eit\u011bj\u0161\u00edch identifikovan\u00fdch mutac\u00ed byla PB2-E627K, kter\u00e1 podle v\u00fdzkumn\u00edk\u016f:<\/span><\/p>\n

„Vylep\u0161en\u00e1 replikace a p\u0159enos vir\u016f u savc\u016f.“<\/span><\/em><\/p>\n

Tato mutace se zpo\u010d\u00e1tku vyskytovala s n\u00edzkou frekvenc\u00ed, ale b\u011bhem experimentu se u n\u011bkter\u00fdch zv\u00ed\u0159at stala dominantn\u00ed virovou populac\u00ed:<\/span><\/p>\n

\u201ePB2-E627K \u2026 byl identifikov\u00e1n jako men\u0161inov\u00e1 varianta (u 9,6 %\u201332,5 % vir\u016f) \u2026 Jedno zv\u00ed\u0159e \u2026 vykazovalo tuto substituci p\u0159ev\u00e1\u017en\u011b ve vzorc\u00edch plic (88 %) i mozku (\u226595 %).\u201c<\/span><\/em><\/p>\n

Dal\u0161\u00ed mutace pozorovan\u00e1 b\u011bhem experiment\u016f, PB2-D701N, je pravd\u011bpodobn\u011b spojena se zv\u00fd\u0161enou virulenc\u00ed u savc\u016f:<\/span><\/p>\n

\u201ePB2-D701N … zvy\u0161uje patogenitu u my\u0161\u00ed a lid\u00ed.\u201c<\/span><\/em><\/p>\n

V n\u011bkter\u00fdch p\u0159\u00edpadech se ob\u011b mutace vyskytly sou\u010dasn\u011b:<\/span><\/p>\n

\u201eDvojit\u00e9 substituce PB2-E627K a PB2-D701N \u2026 zvy\u0161uj\u00ed virulenci a p\u0159enosnost u my\u0161\u00ed.\u201c<\/span><\/em><\/p>\n

Tyto v\u00fdsledky ukazuj\u00ed, \u017ee b\u011bhem experiment\u016f financovan\u00fdch NIH se populace vir\u016f u savc\u016f posunuly sm\u011brem k variant\u00e1m nesouc\u00edm mutace, o nich\u017e je zn\u00e1mo, \u017ee zvy\u0161uj\u00ed replikaci, virulenci a p\u0159enosnost u savc\u016f.<\/span><\/p>\n

Experimenty prov\u00e1d\u011bn\u00e9 v laborato\u0159i s vysokou bezpe\u010dnost\u00ed<\/span><\/p>\n

Kmeny viru pou\u017eit\u00e9 v experimentech byly p\u016fvodn\u011b izolov\u00e1ny z voln\u011b \u017eij\u00edc\u00edch pt\u00e1k\u016f a n\u00e1sledn\u011b byly pou\u017eity k infikov\u00e1n\u00ed savc\u016f v laboratorn\u00edch experimentech.<\/span><\/p>\n

K infekc\u00edm do\u0161lo v:<\/span><\/p>\n

„za\u0159\u00edzen\u00ed pro uchov\u00e1v\u00e1n\u00ed zv\u00ed\u0159at s \u00farovn\u00ed biologick\u00e9 bezpe\u010dnosti 3+.“<\/span><\/em><\/p>\n

Laborato\u0159e BSL-3+ se pou\u017e\u00edvaj\u00ed pro v\u00fdzkum nebezpe\u010dn\u00fdch patogen\u016f p\u0159en\u00e1\u0161en\u00fdch vzduchem.<\/span><\/p>\n

V\u00fdzkum v r\u00e1mci \u201epandemick\u00e9 p\u0159ipravenosti\u201c \u2013 Xofluza schv\u00e1len\u00e1 FDA nab\u00edz\u00ed ochranu<\/span><\/p>\n

Auto\u0159i uv\u00e1d\u011bj\u00ed, \u017ee experimenty byly provedeny ve jm\u00e9nu p\u0159ipravenosti na pandemii.<\/span><\/p>\n

Napsali:<\/span><\/p>\n

\u201eMezikontinent\u00e1ln\u00ed \u0161\u00ed\u0159en\u00ed vysoce patogenn\u00edch vir\u016f pta\u010d\u00ed ch\u0159ipky A(H5N1) p\u0159edstavuje v\u00fdznamn\u00e1 pandemick\u00e1 rizika.\u201c<\/span><\/em><\/p>\n

V\u00fdzkumn\u00edci dosp\u011bli k z\u00e1v\u011bru, \u017ee jejich zji\u0161t\u011bn\u00ed by m\u011bla v\u00e9st budouc\u00ed strategie pro boj s pandemi\u00ed:<\/span><\/p>\n

\u201eBaloxavir… by m\u011bl b\u00fdt zohledn\u011bn p\u0159i pl\u00e1nov\u00e1n\u00ed pandemie.\u201c<\/span><\/em><\/p>\n

Vzhledem k tomu, \u017ee baloxavir (Xofluza) je antivirotikum ji\u017e schv\u00e1len\u00e9 FDA a studie zjistila, \u017ee \u201ezcela chr\u00e1nil my\u0161i p\u0159ed smrt\u00ed\u201c a \u201ezabra\u0148oval neuroinvazi\u201c, tyto v\u00fdsledky nazna\u010duj\u00ed, \u017ee schv\u00e1len\u00e9 terapeutick\u00e9 protiopat\u0159en\u00ed proti H5N1 je ji\u017e k dispozici, sp\u00ed\u0161e ne\u017e aby se spol\u00e9halo pouze na v\u00fdvoj a nouzov\u00e9 schv\u00e1len\u00ed nov\u00e9 experiment\u00e1ln\u00ed vakc\u00edny.<\/span><\/p>\n

Experimenty sice posunuly virus H5N1 sm\u011brem k nebezpe\u010dn\u011bj\u0161\u00edm mutac\u00edm adaptovan\u00fdm na savce, ale z\u00e1rove\u0148 uk\u00e1zaly, \u017ee ochranu nab\u00edz\u00ed antivirov\u00fd l\u00e9k schv\u00e1len\u00fd \u00da\u0159adem pro kontrolu potravin a l\u00e9\u010div (FDA), co\u017e potvrzuje, \u017ee v p\u0159\u00edpad\u011b pot\u0159eby je k dispozici st\u00e1vaj\u00edc\u00ed l\u00e9\u010dba.<\/span><\/p>\n

Politika NIH definuje zv\u00fd\u0161en\u00ed patogenity nebo p\u0159enosnosti jako zisk funkce.<\/span><\/p>\n

Dne 18. \u010dervna 2025 zve\u0159ejnily N\u00e1rodn\u00ed instituty zdrav\u00ed ozn\u00e1men\u00ed NOT-OD-25-127 t\u00fdkaj\u00edc\u00ed se implementace v\u00fdkonn\u00e9ho na\u0159\u00edzen\u00ed B\u00edl\u00e9ho domu o bezpe\u010dnosti biologick\u00e9ho v\u00fdzkumu.<\/span><\/p>\n

Toto ozn\u00e1men\u00ed poskytuje celost\u00e1tn\u00ed definici nebezpe\u010dn\u00e9ho v\u00fdzkumu zam\u011b\u0159en\u00e9ho na z\u00edsk\u00e1n\u00ed funkce.<\/span><\/p>\n

NIH vysv\u011btluje:<\/span><\/p>\n

\u201eNebezpe\u010dn\u00fd v\u00fdzkum zam\u011b\u0159en\u00fd na zisk funkce znamen\u00e1 v\u011bdeck\u00fd v\u00fdzkum infek\u010dn\u00edho agens nebo toxinu s potenci\u00e1lem zp\u016fsobit onemocn\u011bn\u00ed zv\u00fd\u0161en\u00edm jeho patogenity nebo p\u0159enosnosti.\u201c<\/span><\/em><\/p>\n

Pokyny d\u00e1le specifikuj\u00ed, \u017ee zisk funkce zahrnuje n\u00e1sleduj\u00edc\u00ed:<\/span><\/p>\n

\u201e(a) zv\u00fd\u0161it \u0161kodliv\u00e9 \u00fa\u010dinky patogenu nebo toxinu;\u201c<\/span><\/em><\/p>\n

a:<\/span><\/p>\n

\u201ed) zvy\u0161uj\u00ed stabilitu, p\u0159enosnost nebo schopnost \u0161\u00ed\u0159en\u00ed patogenu nebo toxinu;\u201c<\/span><\/em><\/p>\n

Nov\u00fd experiment s H5N1, financovan\u00fd NIH, \u00fadajn\u011b vytvo\u0159il populace viru nesouc\u00ed mutace, kter\u00e9 spl\u0148uj\u00ed tato krit\u00e9ria.<\/span><\/p>\n

Studie identifikovala varianty s PB2-E627K, kter\u00e9:<\/span><\/p>\n

„Vylep\u0161en\u00e1 replikace a p\u0159enos vir\u016f u savc\u016f.“<\/span><\/em><\/p>\n

A PB2-D701N, kter\u00fd:<\/span><\/p>\n

„zvy\u0161uje patogenitu u my\u0161\u00ed a lid\u00ed.“<\/span><\/em><\/p>\n

U n\u011bkter\u00fdch zv\u00ed\u0159at se tyto mutace staly dominantn\u00ed virovou populac\u00ed v plic\u00edch a mozku:<\/span><\/p>\n

\u201eU jednoho zv\u00ed\u0159ete \u2026 byla tato substituce prok\u00e1z\u00e1na p\u0159ev\u00e1\u017en\u011b ve vzorc\u00edch plic (88 %) i mozku (\u226595 %).\u201c<\/span><\/em><\/p>\n

Podle vlastn\u00ed definice NIH spl\u0148uje v\u00fdzkum, kter\u00fd produkuje patogeny se zv\u00fd\u0161enou patogenitou nebo p\u0159enosnost\u00ed, celost\u00e1tn\u00ed prahovou hodnotu pro z\u00edsk\u00e1n\u00ed funkce.<\/span><\/p>\n

Z\u00e1v\u011br<\/span><\/strong><\/span><\/p>\n

V\u011bdci financovan\u00ed NIH infikovali savce smrt\u00edc\u00edm virem H5N1, co\u017e zp\u016fsobilo, \u017ee se virus posunul sm\u011brem k mutac\u00edm, o nich\u017e je zn\u00e1mo, \u017ee zvy\u0161uj\u00ed virulenci a p\u0159enos \u2013 co\u017e spl\u0148uje feder\u00e1ln\u00ed definici zes\u00edlen\u00ed funkce \u2013 zat\u00edmco stejn\u00fd experiment potvrdil, \u017ee antivirov\u00fd l\u00e9k ji\u017e schv\u00e1len\u00fd FDA poskytuje ochranu, co\u017e nazna\u010duje, \u017ee je k dispozici st\u00e1vaj\u00edc\u00ed protiopat\u0159en\u00ed.<\/span><\/p>\n

Jon Fleetwood<\/span><\/em><\/p>\n<\/div>\n<\/div>\n

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Zdroj<\/span><\/a><\/span><\/h3>\n

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

Experimenty NIH s pta\u010d\u00ed ch\u0159ipkou vytv\u00e1\u0159ej\u00ed smrteln\u00fd virus se zv\u00fd\u0161enou virulenc\u00ed a mutacemi p\u0159enosnosti u…<\/p>\n","protected":false},"author":2,"featured_media":54653,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[1042,1180,2206,1561],"_links":{"self":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/100326"}],"collection":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/comments?post=100326"}],"version-history":[{"count":0,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/100326\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media\/54653"}],"wp:attachment":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media?parent=100326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/categories?post=100326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/tags?post=100326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}