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Debbie, Denise, Diana e Daisy sono cloni della celebre pecora Dolly, le prime di un mammifero. Otto anni dopo la loro nascita — e a 20 da quella della loro "antenata" —, sono ancora in perfetta forma.
Lo ha stabilito un dettagliato studio, mai condotto finora a questi livelli, pubblicato oggi — martedì — su Nature Communications. Gli esami fatti sui quattro esemplari per valutare l'insorgenza di malattie legate all'invecchiamento hanno dato esito negativo e chiudono la discussione sui possibili rischi della tecnica impiegata.
La morte per infezione polmonare a sette anni della prima prima bestiola avevano infatti sollevato il dubbio che la pratica potesse essere alla base alla comparsa precoce di patologie legate alla vecchiaia.
ATS/px
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