In the near future, doctors hope to be able to perform sophisticated blood tests with the push of a button. That revolution in medical diagnostics could be made possible by products like the Verigene system, which uses DNA-coated gold nanoparticles to identify telltale proteins and important genes. Last year, the FDA gave Nanosphere the go-ahead to sell a genetic test, based on the Verigene system, that lets physicians predict how well their patients will respond to the anticoagulant drug warfarin. Choosing the right dose of that medication is notoriously tricky, but the additional information should make it much easier.
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