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Colonie di batteri geneticamente modificati diventano "fabbriche" per la produzione di antibiotici di nuova generazione, capaci di combattere anche le infezioni resistenti ai farmaci attualmente disponibili. Il risultato viene annunciato sulla rivista Science Advances da un gruppo di bioingegneri dell'Università di Buffalo a New York.
Dentro alle loro minuscole bio-fabbriche di antibiotici lavorano "operai" molto speciali, dei batteri Escherichia coli innocui per la salute umana. Ci sono voluti 11 anni di ricerche per riprogrammare il loro Dna e "addestrarli" a lavorare come alla catena di montaggio per assemblare i pezzi dell'antibiotico eritromicina, impiegato per curare malattie che vanno dalla polmonite fino alle infezioni del tratto urinario.
Una volta compiuto questo primo passo, i ricercatori hanno ulteriormente ritoccato il Dna dei batteri inducendoli a produrre dozzine di nuove varianti di eritromicina, che presentano piccole modificazioni nella loro struttura molecolare.
ATS/sdr
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