{"id":2744,"date":"2024-09-07T05:10:49","date_gmt":"2024-09-07T05:10:49","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=2744"},"modified":"2024-09-07T05:10:49","modified_gmt":"2024-09-07T05:10:49","slug":"artificial-blood-breakthrough-hemerythrin-safety-concerns","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/biotechnology\/artificial-blood-breakthrough-hemerythrin-safety-concerns\/","title":{"rendered":"Um\u011bl\u00e1 krev: L\u00e9ka\u0159sk\u00fd pr\u016flom na obzoru"},"content":{"rendered":"

Um\u011bl\u00e1 krev: L\u00e9ka\u0159sk\u00fd pr\u016flom na obzoru<\/h2>\n\n

V\u00fdvoj um\u011bl\u00e9 krve<\/h2>\n\n

Po stalet\u00ed se v\u011bdci sna\u017e\u00ed vytvo\u0159it bezpe\u010dnou a \u00fa\u010dinnou n\u00e1hra\u017eku um\u011bl\u00e9 krve, kter\u00e1 m\u016f\u017ee zachr\u00e1nit \u017eivoty v l\u00e9ka\u0159sk\u00fdch pohotovostech a \u0159e\u0161it probl\u00e9my spojen\u00e9 s transfuzemi krve. Hemoglobin, protein zodpov\u011bdn\u00fd za p\u0159enos kysl\u00edku v \u010derven\u00fdch krvink\u00e1ch, byl hlavn\u00edm zam\u011b\u0159en\u00edm tohoto \u00fasil\u00ed. Hemoglobin je v\u0161ak k\u0159ehk\u00fd a m\u016f\u017ee se snadno rozpadnout mimo ochrann\u00e9 prost\u0159ed\u00ed krvinek.<\/p>\n\n

Bezpe\u010dnostn\u00ed obavy ve v\u00fdzkumu um\u011bl\u00e9 krve<\/h2>\n\n

P\u0159es slibn\u00e9 ran\u00e9 v\u00fdsledky \u010delily klinick\u00e9 studie n\u00e1hra\u017eek krve na b\u00e1zi hemoglobinu kv\u016fli obav\u00e1m o bezpe\u010dnost ur\u010dit\u00fdm ne\u00fasp\u011bch\u016fm. HemAssist spole\u010dnosti Baxter Healthcare Corporation, testovan\u00fd v 90. letech 20. stolet\u00ed, zvy\u0161oval \u00famrtnost pacient\u016f. Podobn\u011b byl p\u0159\u00edpravek PolyHeme spole\u010dnosti Northfield Laboratories spojov\u00e1n s ne\u017e\u00e1douc\u00edmi \u00fa\u010dinky u pacient\u016f s traumaty.<\/p>\n\n

Mo\u017en\u00e9 vyu\u017eit\u00ed um\u011bl\u00e9 krve v l\u00e9ka\u0159sk\u00fdch pohotovostech<\/h2>\n\n

Um\u011bl\u00e1 krev m\u00e1 potenci\u00e1l zm\u011bnit l\u00e9ka\u0159skou p\u00e9\u010di v situac\u00edch, kdy nen\u00ed k dispozici p\u0159irozen\u00e1 krev nebo je nebezpe\u010dn\u00e1. Mohla by odstranit pot\u0159ebu transfuz\u00ed krve v p\u0159\u00edpad\u011b nouze, sn\u00ed\u017eit riziko infekc\u00ed a alergick\u00fdch reakc\u00ed a poskytnout snadno dostupnou z\u00e1sobu krve pro pou\u017eit\u00ed na boji\u0161ti nebo v odlehl\u00fdch oblastech.<\/p>\n\n

Vyu\u017eit\u00ed hemerythrinu jako p\u0159ena\u0161e\u010de kysl\u00edku<\/h2>\n\n

Rumunsk\u00fd v\u011bdec Radu Silaghi-Dumitrescu vyvinul n\u00e1hra\u017eku um\u011bl\u00e9 krve, kter\u00e1 vyu\u017e\u00edv\u00e1 hemerythrin, protein nach\u00e1zej\u00edc\u00ed se u bezobratl\u00fdch \u017eivo\u010dich\u016f, jako jsou mo\u0159\u0161t\u00ed \u010dervi. Hemerythrin je stabiln\u011bj\u0161\u00ed ne\u017e hemoglobin a m\u00e9n\u011b n\u00e1chyln\u00fd k rozkladu mimo krvinky. Produkt Silaghi-Dumitrescua je kombinac\u00ed hemerythrinu, soli a albuminu, o n\u011bm\u017e se domn\u00edv\u00e1, \u017ee jej lze vylep\u0161it na roztok \u201eokam\u017eit\u00e9 krve\u201c.<\/p>\n\n

Etick\u00e9 \u00favahy v klinick\u00fdch zkou\u0161k\u00e1ch<\/h2>\n\n

Klinick\u00e9 zkou\u0161ky produkt\u016f um\u011bl\u00e9 krve vyvol\u00e1vaj\u00ed d\u016fle\u017eit\u00e9 etick\u00e9 ot\u00e1zky. V\u00fdzkumn\u00ed pracovn\u00edci mus\u00ed vyv\u00e1\u017eit potenci\u00e1ln\u00ed p\u0159\u00ednosy nov\u00fdch l\u00e9\u010debn\u00fdch postup\u016f s riziky pro \u00fa\u010dastn\u00edky. \u00da\u0159ad pro kontrolu potravin a l\u00e9\u010div (FDA) stanovil p\u0159\u00edsn\u00e9 pokyny pro klinick\u00e9 zkou\u0161ky, v\u010detn\u011b informovan\u00e9ho souhlasu \u00fa\u010dastn\u00edk\u016f a pe\u010dliv\u00e9ho sledov\u00e1n\u00ed bezpe\u010dnosti.<\/p>\n\n

Srovn\u00e1n\u00ed n\u00e1hra\u017eek krve na b\u00e1zi hemoglobinu a hemerythrinu<\/h2>\n\n

N\u00e1hra\u017eky krve na b\u00e1zi hemoglobinu byly zkoum\u00e1ny d\u016fkladn\u011bji, ale \u010delily bezpe\u010dnostn\u00edm v\u00fdzv\u00e1m. N\u00e1hra\u017eky na b\u00e1zi hemerythrinu, jako je produkt Silaghi-Dumitrescua, nab\u00edzej\u00ed potenci\u00e1ln\u00ed v\u00fdhody z hlediska stability a sn\u00ed\u017een\u00fdch vedlej\u0161\u00edch \u00fa\u010dink\u016f. Dal\u0161\u00ed v\u00fdzkum je nezbytn\u00fd k porovn\u00e1n\u00ed \u00fa\u010dinnosti a bezpe\u010dnosti t\u011bchto r\u016fzn\u00fdch p\u0159\u00edstup\u016f.<\/p>\n\n

Regula\u010dn\u00ed cesta ke schv\u00e1len\u00ed produkt\u016f um\u011bl\u00e9 krve<\/h2>\n\n

FDA hraje z\u00e1sadn\u00ed roli p\u0159i regulaci v\u00fdvoje a schvalov\u00e1n\u00ed produkt\u016f um\u011bl\u00e9 krve. Agentura vyhodnocuje bezpe\u010dnost a \u00fa\u010dinnost t\u011bchto produkt\u016f prost\u0159ednictv\u00edm p\u0159\u00edsn\u00e9ho procesu kontroly. V\u00fdrobci mus\u00ed p\u0159ed schv\u00e1len\u00edm FDA p\u0159edlo\u017eit rozs\u00e1hl\u00e9 \u00fadaje ze studi\u00ed na zv\u00ed\u0159atech a klinick\u00fdch zkou\u0161ek.<\/p>\n\n

Historie ne\u00fasp\u011b\u0161n\u00fdch experiment\u016f s um\u011blou krv\u00ed<\/h2>\n\n

\u00dasil\u00ed o um\u011blou krev bylo poznamen\u00e1no \u00fasp\u011bchy i ne\u00fasp\u011bchy. P\u0159es \u010dasn\u00e9 sliby vedly n\u011bkter\u00e9 experimenty k ne\u017e\u00e1douc\u00edm \u00fa\u010dink\u016fm nebo dokonce ke smrti. Tyto ne\u00fasp\u011bchy zd\u016fraznily v\u00fdzvy spojen\u00e9 s napodobov\u00e1n\u00edm slo\u017eit\u00fdch vlastnost\u00ed p\u0159irozen\u00e9 krve.<\/p>\n\n

Role Rumunska ve v\u00fdzkumu um\u011bl\u00e9 krve<\/h2>\n\n

A\u010dkoli Rumunsko m\u016f\u017ee b\u00fdt spojov\u00e1no s legendou o Draculovi, je tak\u00e9 domovem pr\u016flomov\u00e9ho v\u00fdzkumu um\u011bl\u00e9 krve. Pr\u00e1ce Silaghi-Dumitrescua na univerzit\u011b Babe\u0219-Bolyai v Klu\u017ei-Napoce p\u0159edstavuje v\u00fdznamn\u00fd p\u0159\u00edsp\u011bvek k tomuto oboru.<\/p>\n\n

Budouc\u00ed vyhl\u00eddky na v\u00fdvoj um\u011bl\u00e9 krve<\/h2>\n\n

V\u00fdvoj um\u011bl\u00e9 krve je st\u00e1le aktivn\u00ed oblast\u00ed v\u00fdzkumu. V\u011bdci zkoumaj\u00ed nov\u00e9 p\u0159\u00edstupy, jako je pou\u017eit\u00ed kmenov\u00fdch bun\u011bk k p\u011bstov\u00e1n\u00ed \u010derven\u00fdch krvinek nebo v\u00fdvoj syntetick\u00fdch p\u0159ena\u0161e\u010d\u016f kysl\u00edku. P\u0159esto\u017ee v\u00fdzvy p\u0159etrv\u00e1vaj\u00ed, potenci\u00e1ln\u00ed v\u00fdhody um\u011bl\u00e9 krve z n\u00ed \u010din\u00ed slibnou perspektivu v oblasti l\u00e9ka\u0159sk\u00e9 technologie.<\/p>","protected":false},"excerpt":{"rendered":"

Um\u011bl\u00e1 krev: L\u00e9ka\u0159sk\u00fd pr\u016flom na obzoru V\u00fdvoj um\u011bl\u00e9 krve Po stalet\u00ed se v\u011bdci sna\u017e\u00ed vytvo\u0159it bezpe\u010dnou a \u00fa\u010dinnou n\u00e1hra\u017eku um\u011bl\u00e9 krve, kter\u00e1 m\u016f\u017ee zachr\u00e1nit \u017eivoty v l\u00e9ka\u0159sk\u00fdch pohotovostech a \u0159e\u0161it…<\/p>\n","protected":false},"author":2,"featured_media":24264,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1763],"tags":[5463,5465,5464,358],"class_list":["post-2744","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biotechnology","tag-artificial-blood","tag-healthtech","tag-hemerythrin","tag-medical-innovation"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=2744"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2744\/revisions"}],"predecessor-version":[{"id":24265,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2744\/revisions\/24265"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/24264"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=2744"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=2744"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=2744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}