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Slipping through cell walls, nanotubes deliver high-potency punch to cancer tumors in mice
Date:8/14/2008

large to get through the holes in the walls of normal blood vessels, but still small enough to easily slip through the larger holes in the relatively leaky blood vessels in the tumor tissue.

That enabled the nanotubes to deliver their medicinal payload with tremendous efficiency, throwing a therapeutic wrench into the cellular means of reproduction and thus squelching the hitherto unrestrained proliferation of the tumor cells.

Dai said that the technique holds potential for delivering a range of medications and that it may also be possible to develop ways to channel the nanotubes to their target even more precisely.

"Right now what we are doing is so-called 'passive targeting,' which is using the leaky vasculature of the tumor," he said. "But a more active targeting would be attaching a peptide or antibody to the nanotube drug, one that will bind more specifically to the tumor, which should further enhance the treatment efficacy."

Dai's team is already at work developing more targeted approaches, and he is optimistic about the potential applications of nanotubes.

"We are definitely hoping to be able to push this to practical applications into the clinic. This is one step forward," he said. "But it will still take time to truly prove the efficacy and the safety."


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Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

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