FISHING FOR TUMORS: RADICAL TECHNIQUE DRAGS CANCER CELLS OUT OF BRAIN WITH TINY ROD
"One attraction about the approach is that it is purely a device. There are no drugs entering the blood stream and circulating in the brain to harm healthy cells. Treating these cancers with minimally-invasive films could be a lot less dangerous than deploying pharmaceutical chemicals." -Ravi Bellamkonda
(Atlanta, GA)—One factor that makes glioblastoma cancers so difficult to treat is that malignant cells from the tumors spread throughout the brain by following nerve fibers and blood vessels to invade new locations. Now, researchers have learned to hijack this migratory mechanism, turning it against the cancer by using a film of nanofibers thinner than human hair to lure tumor cells away.Instead of invading new areas, the migrating cells latch onto the specially-designed nanofibers and follow them to a location—potentially outside the brain—where they can be captured and killed. Using this technique, researchers can partially move tumors from inoperable locations to more accessible ones. Though it won't eliminate the cancer, the new technique reduced the size of brain tumors in animal models, suggesting that this form of brain cancer might one day be treated more like a chronic disease.
"We have designed a polymer thin film nanofiber that mimics the structure of nerves and blood vessels that brain tumor cells normally use to invade other parts of the brain," explained Ravi Bellamkonda, lead investigator and chair of the Wallace H. Coulter Department of Biomedical Engineering at Georgia Tech and Emory University. "The cancer cells normally latch onto these natural structures and ride them like a monorail to other parts of the brain. By providing an attractive alternative fiber, we can efficiently move the tumors along a different path to a destination that we choose."Details of the technique were scheduled to be reported February 16 in the journal Nature Materials. The research was supported by the National Cancer Institute (NCI), part of the National Institutes of Health; by Atlanta-based Ian's Friends Foundation, and by the Georgia Research Alliance. In addition to the Coulter Department of Biomedical Engineering, the research team included Children's Healthcare of Atlanta and Emory University.
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