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Un esercito di micro-robot potrebbe essere la futura arma contro i tumori: sono minuscole navette cariche di farmaci che, guidate a distanza, vengono introdotte nell'organismo per consegnare il loro contenuto nel posto giusto e al momento giusto.
Sperimentati finora negli animali per studiarne l'efficacia nei tumori del tratto digestivo, i minuscoli robot sono descritti sulla rivista Science Robotics dal gruppo del California Institute of Technology (Caltech) guidato da Lihong Wang e Wei Gao.
I micro-robot vengono guidati verso il tumore utilizzando una Tac che sfrutta gli impulsi della luce laser a infrarossi e che permette di visualizzarli in tempo reale. Una volta arrivati vicino al tumore, i robot vengono attivati da un raggio laser ad alta potenza e onde continue. Irradiata con luce a infrarossi, la capsula che li avvolge si disintegra, in modo da rilasciarli e permettere loro di aderire al tessuto del tumore, liberando il farmaco.
ATS/ANSA/Swing
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