Jeffrey C. Hall, Michael Rosbash e Michael W. Young hanno ricevuto il Nobel per la Medicina 2017, per aver scoperto il meccanismo molecolare che controlla il ritmo circadiano, ossia il comportamento dell'orologio biologico.
I tre ricercatori statunitensi sono riusciti a scoprire il meccanismo con il quale tutti gli esseri viventi, dalle piante agli esseri umani, riescono a regolare i loro ritmi biologici in sintonia con l'ambiente, ad esempio con l'alternarsi di giorno e notte conseguenza della rotazione dellaTerra.
Studiando il Dna degli organismi più semplici e più studiati dai genetisti, i moscerini della frutta, hanno isolato il gene che regola questo comportamento universale. Così facendo hanno dimostrato in particolare che il gene controlla la produzione di una proteina che si accumula nelle cellule durate la notte e che viene degradata durante il giorno.
ATS/bin
Orologio biologico da Nobel
RSI Mondo 02.10.2017, 19:16
Assegnato il Nobel per la medicina
Telegiornale 02.10.2017, 14:30
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