{"id":18219,"date":"2025-10-16T09:18:59","date_gmt":"2025-10-16T17:18:59","guid":{"rendered":"https:\/\/gayecho.com\/news\/?p=18219"},"modified":"2025-10-16T09:18:59","modified_gmt":"2025-10-16T17:18:59","slug":"nemacki-naucnici-pronasli-antitelo-protiv-hiv-a","status":"publish","type":"post","link":"https:\/\/gayecho.com\/news\/nemacki-naucnici-pronasli-antitelo-protiv-hiv-a\/","title":{"rendered":"Nema\u010dki nau\u010dnici prona\u0161li antitelo protiv HIV-a"},"content":{"rendered":"<p><strong>Kratko pre po\u010detka Evropske konferencije o AIDS-u, u Kelnu je otkriveno novo antitelo protiv HIV virusa. U laboratoriji je pokazalo sposobnost da spre\u010di infekcije i neutrali\u0161e virus \u2013 nova nada u borbi protiv AIDS-a?<\/strong><\/p>\n<p>Od 1981. godine, kada je bolest postala poznata, AIDS je odneo 44 miliona \u017eivota \u0161irom sveta. Smatra se jednom od najte\u017eih epidemija u istoriji \u010dove\u010danstva. Iako je broj smrtnih slu\u010dajeva vremenom opao zahvaljuju\u0107i edukaciji i preventivnim merama, ljudi i dalje umiru od posledica ove bolesti. Tokom 2024. godine, od AIDS-a je u svetu umrlo oko 630.000 ljudi.<\/p>\n<p>Zbog toga otkri\u0107e Univerzitetske klinike u Kelnu budi novu nadu da bi moglo predstavljati jo\u0161 jedno oru\u017eje u borbi protiv ove bolesti.<\/p>\n<p><strong>Testirano je vi\u0161e od 800 antitela protiv HIV-a <\/strong><\/p>\n<p>Istra\u017eiva\u010dki tim koji predvodi Florijan Klajn, direktor Instituta za virusologiju, prou\u010dio je uzorke krvi 32 osobe. Sve one su zara\u017eene HIV-om, ali su samostalno \u2013 dakle, bez terapije \u2013 razvile sna\u017ean i \u0161iroko delotvoran imuni odgovor kroz antitela protiv virusa.<\/p>\n<p>Nau\u010dnici su u laboratoriji testirali vi\u0161e od 800 razli\u010ditih antitela iz tih uzoraka, ispituju\u0107i njihovu sposobnost da neutrali\u0161u HIV viruse. Jedno od njih, pod oznakom 04_A06, posebno se istaklo. Ovo antitelo blokira mesto pomo\u0107u kog se virus vezuje za \u0107elije doma\u0107ina tokom infekcije. Na taj na\u010din spre\u010dava ulazak HIV virusa u \u0107elije. Kada virus u\u0111e u \u0107eliju, on preuzima njene funkcije i koristi je za sopstveno umno\u017eavanje, \u010dime dugoro\u010dno slabi imuni sistem.<\/p>\n<p>Plan za proizvodnju antitela nalazi se u ljudskom imunom sistemu \u2013 u B-limfocitima. Kada do\u0111u u kontakt s patogenima, ovi limfociti sazrevaju u plazma \u0107elije koje proizvode velike koli\u010dine antitela \u2013 me\u0111u njima i 04_A06. Istra\u017eiva\u010di su de\u0161ifrovali genetski plan za njegovo stvaranje i uspeli da ga reprodukuju.<\/p>\n<p>\u201eZna\u010di, vi\u0161e nije potrebno uzimati krv od pacijenata, ve\u0107 se taj genetski plan mo\u017ee ubaciti u drugu \u0107eliju i re\u0107i joj: proizvedi ovaj protein \u2013 odnosno ovo antitelo.\u201c<\/p>\n<p><strong>Antitelo 04_A06 \u2013 za terapiju i prevenciju HIV-a<\/strong><\/p>\n<p>U eksperimentima na mi\u0161evima koji su nosili komponente ljudskog imunog sistema i bili zara\u017eeni HIV-om, antitelo 04_A06 uspelo je da potpuno neutrali\u0161e ve\u0107inuHIV virusa. Istra\u017eiva\u010di su sproveli testove na oko 340 razli\u010ditih varijanti HIV-a, uklju\u010duju\u0107i i one koje su ve\u0107 bile otporne na druga antitela.<\/p>\n<p>\u201eVirusi su veoma raznoliki, i to je razlog za\u0161to je HIV tako te\u0161ko le\u010diti \u2013 jer postoji velika genetska raznolikost me\u0111u virusima\u201c, obja\u0161njava Klajn. Novo otkriveno antitelo, me\u0111utim, uspelo je da neutralizuje 98 odsto testiranih varijanti.<\/p>\n<p>Dakle, 04_A06 bi mogao pomo\u0107i ljudima koji su ve\u0107 zara\u017eeni HIV-om, jer virusu onemogu\u0107ava pristup \u0107eliji. \u201eVezuje se za receptor virusa, blokira ga i tako spre\u010dava da zarazi ciljnu \u0107eliju.\u201c Pored toga, virusi koji su \u201eozna\u010deni\u201c antitelima lak\u0161e se prepoznaju i uni\u0161tavaju od strane imunog sistema.<\/p>\n<p>Ovo antitelo bi se moglo koristiti i preventivno, kako bi se spre\u010dila HIV infekcija: \u201eAko antitelo ve\u0107 postoji u telu, virus koji u\u0111e biva odmah zaustavljen pre nego \u0161to uspe da zarazi \u0107eliju.\u201c<\/p>\n<p><strong>Jo\u0161 uvek ne postoji vakcina protiv HIV-a<\/strong><\/p>\n<p>Novo antitelo bi moglo da deluje kao tzv. pasivna imunizacija. Suprotno tome, aktivna imunizacija podrazumeva vakcinu koja omogu\u0107ava telu da samo proizvodi antitela \u2013 ali takva vakcina jo\u0161 ne postoji.<\/p>\n<p>Postoje istra\u017eivanja s mRNA vakcinom, koja bi trebalo da podstakne imuni sistem da reaguje na odre\u0111eni protein iz omota\u010da HIV virusa. Me\u0111utim, do sada je ovaj pristup testiran samo na jednoj varijanti virusa.<\/p>\n<p>Trenutno se razli\u010diti lekovi u obliku tableta ili injekcija koriste za profilaksu protiv HIV infekcija, i to s velikim uspehom. Ipak, tablete se naj\u010de\u0161\u0107e moraju uzimati svakodnevno. Dugotrajni preparati sa depo-efektom, poput onih koji sadr\u017ee lenakapavir, ve\u0107 su odobreni u SAD i EU, ali se u EU jo\u0161 uvek ne prodaju.<\/p>\n<p>Ideja iza profilakse antitelima poput 04_A06, obja\u0161njava Klajn, jeste:<br \/>\n\u201eDa se mo\u017ee izbe\u0107i svakodnevno uzimanje tableta, jer bi postojala preko 90 odsto verovatno\u0107a da se infekcija spre\u010di.\u201c Profilaksa antitelima uzimala bi se otprilike na svakih \u0161est meseci.<\/p>\n<p><strong>Novo HIV antitelo s visokom efikasno\u0161\u0107u<\/strong><\/p>\n<p>Do sada su ve\u0107 otkrivana i druga antitela \u0161irokog dejstva protiv HIV-a, ali je \u201e04_A06 definitivno izuzetno sna\u017ean predstavnik te grupe\u201c, ocenjuje Aleksandra Trkola, direktorka Instituta za medicinsku virusologiju Univerziteta u Cirihu.<\/p>\n<p>\u201eTeoretski, 04_A06 sam posti\u017ee efikasnost koja se ina\u010de dosti\u017ee samo kombinacijom vi\u0161e antitela.\u201c<\/p>\n<p>\u201eSna\u017ean\u201c u ovom kontekstu zna\u010di: \u010dak i kada se mala koli\u010dina antitela primeni na zara\u017eene \u0107elije, efekat je vrlo izra\u017een. To je va\u017eno ako bi se otkri\u0107e iz Kelna jednog dana pretvorilo u lek koji bi se davao injekcijom. Jer mo\u017ee se primeniti samo ograni\u010dena koli\u010dina \u2013 a davanje 20 injekcija ne bi bilo samo neugodno, ve\u0107 bi i proizvodnja leka bila veoma skupa, obja\u0161njava Klajn.<\/p>\n<p><strong>Dugo putovanje do leka protiv AIDS-a<\/strong><\/p>\n<p>Me\u0111utim, do razvoja stvarnog leka na osnovu 04_A06 moglo bi pro\u0107i dosta vremena, smatra Kristof \u0160piner, \u0161ef odeljenja za infektologiju na Univerzitetskoj klinici \u201eRechts der Isar&#8221; u Minhenu. On napominje da su rezultati iz Kelna za sada samo laboratorijski podaci, \u201epa se efikasnost ne mo\u017ee direktno preneti na stvarne uslove \u017eivota&#8221;. Potrebne su daljnje studije o doziranju, bezbednosti i efikasnosti antitela.<\/p>\n<p>I Aleksandra Trkola upozorava: \u201eJo\u0161 uvek ne mo\u017eemo znati da li \u0107e se antitelo pokazati efikasnim i u klini\u010dkoj primeni.\u201c Ipak, dodaje: \u201eZnaci su svakako vrlo ohrabruju\u0107i.\u201c<\/p>\n<p>Izvor:DW<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kratko pre po\u010detka Evropske konferencije o AIDS-u, u Kelnu je otkriveno novo antitelo protiv HIV virusa. U laboratoriji je pokazalo sposobnost da spre\u010di infekcije i neutrali\u0161e virus \u2013 nova nada [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18220,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[],"class_list":["post-18219","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nema\u010dki nau\u010dnici prona\u0161li antitelo protiv HIV-a - GayEcho<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gayecho.com\/news\/nemacki-naucnici-pronasli-antitelo-protiv-hiv-a\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nema\u010dki nau\u010dnici prona\u0161li antitelo protiv HIV-a - GayEcho\" \/>\n<meta property=\"og:description\" content=\"Kratko pre po\u010detka Evropske konferencije o AIDS-u, u Kelnu je otkriveno novo antitelo protiv HIV virusa. 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