Doctorul britanic Simon Fishel a apreciat intr-un interviu acordat agentiei Reuters ca medicina se afla in fata aparitiei unei noi ramuri: „Baby Designer”. Asta inseamna crearea, prin tehnica fertilizarii in vitro, a unei serii de embrioni, urmand sa fie selectionati doar aceia care vor putea fi folositi pentru salvarea vietii unor copii care sufera de diferite boli. Justitia britanica a permis vineri unui cuplu sa incerce neobisnuita metoda pentru a obtine un astfel de bebelus. Dupa nastere, acesta va dona sange pentru a-si vindeca fratele mai mare de talasemie, o boala sanguina rara. Un caz similar s-a petrecut acum doi ani in SUA. (Calin Stroila)
„Dupa decizia de vineri, alte sase familii ai caror copii sufera de diverse boli au apelat la mine pentru a le ajuta sa mai aiba un bebelus, cu aceleasi caracteristici genetice. Scopul: dupa nastere o parte din sangele sau maduva osoasa a acestora va fi folosita pentru vindecarea fratelui sau surorii bolnave”, explica doctorul Simon Fishel, de la spitalul de reproducere asistata din Nottinghamshire.
Trecand peste implicatiile etice ale acestei proceduri, justitia britanica a permis familiei Hashmi sa obtina un bebelus prin fertilizare in vitro, dupa o serie intreaga de teste care sa stabileasca gradul de combatibilitate a fatului cu Zain (foto), un baietel care sufera de talasemie. Aceasta boala sanguina rara se manifesta prin insuficienta globulelor rosii din sange, responsabile de transportarea oxigenului catre tesuturi. Pentru ca nu s-a gasit nici un donator al carui sange sa fie perfect compatibil cu cel al lui Zain, parintii pustiului au cerut permisiunea de a apela la aceasta metoda neobisnuita de fertilizare in vitro. „Pana vom obtine embrionul care sa aiba aproape aceleasi caracteristici genetice cu cele ale lui Zain, am putea face zeci de fertilizari. In uterul mamei nu va fi implantat decat embrionul folositor. Dupa nastere, vom extrage o cantitate de sange din cordonul ombilical al bebelusui si ii vom face lui Zain transfuzie. Este singura lui sansa”, spune doctorul Simon Fishel.
Primul caz de „Baby Designer” a fost inregistrat in urma cu aproape doi ani in SUA. Geneticienii din Chicago i-au implantat americancei Lisa Nash un embrion atent selectionat. Sange si maduva osoasa de la bebelus au fost transplantate lui Molly fetita de sase ani a familiei, care suferea de o boala genetica. Procedura a reusit, ambii copii simtindu-se bine.
Acum, ca si atunci, numerosi savanti si-au exprimat ingrijorarea in ceea ce priveste posibilitatea folosirii acestei proceduri pe scara larga. „Nu stiu daca e corect sa cream fiinte umane doar pentru a le folosi ca surse de organe sau tesuturi pentru alte persoane. Daca aceasta practica va fi aplicata fara discernamant, pot aparea parinti care sa mai vrea un copil numai pentru a transplanta de la acesta un rinichi sau un plaman pentru a salva un alt membru al familiei, bolnav. In plus, parintii ar putea incerca sa „programeze” anumite caracteristici sau aptitudini ale viitorilor copii”, a declarat Arthur Caplan, directorul Centrului de Bioetica al Universitatii Pennsylvania.
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