NIL POTTI, Joseph Nevins and their col-leagues at Duke University in Dur ham, North Carolina, garnered widespread attention in 2006. They reported in the New England Journal of Medicine thai they could predict the course of a patient's lung cancer using devices called expression arrays, which log the activity patterns of thousands of genes in a sample of tissue as a colourful picture (see above). A few months later, they wrote in Nature Medi cine that they had developed a similai technique which used gene expression in laboratory cultures of cancer cells, known as cell lines, to predict which chemotherapy would be most effective for an individ ual patient suffering from lung, breast 01 ovarian cancer.
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