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 A new technique uses a magnetic field to guide potential therapies to stents in clogged blood vessels.

Stents are expandable stainless-steel scaffolds commonly used to prop open clogged arteries. But inserting a stent can damage an artery's inner lining, and stented arteries may reclose after several months, causing blood clots and possibly heart attacks. Now researchers at the Children's Hospital of Philadelphia have devised a way to use tiny iron-bearing nanoparticles and a magnetic field to direct cells with therapeutic properties to the sites of steel stents. The cells could help repair arterial damage and prevent clotting, among other things.

 

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