Nanotubes seen as new weapon in cancer fight

In what a dying Rick Smalley called the most important application from his Nobel Prize-winning discovery [of fullerines], Houston researchers are using [carbon] nanotubes heated by radio waves to kill cancer cells. In a paper posted online by the journal Cancer, a team at the University of Texas M.D. Anderson Cancer Center and Rice University reported that the technique destroyed liver cancer tumors in rabbits and caused no side effects. It is thought to hold the same potential for many other cancers. "I don't want to overstate matters — I'm the biggest skeptic in the world — given the challenges still ahead of us," Dr. Steven Curley, an M.D. Anderson surgical oncologist and the paper's senior author, said Thursday. "But my hope is that this will be a very useful tool to safely and efficiently treat a lot of types of cancer." The therapy marries two disparate disciplines: the relatively ancient field of radio waves and nanotechnology, the cutting-edge science of the ultra-small. The rabbit study found the therapy worked only when the two were used together. It works not by poisoning but by creating a localized hyperthermia — or small fever — that destroys the cancer cells' membranes, protein and even DNA. The cells then die and are carried out of the body through normal kidney functions. In the experiment recounted in Cancer, the rabbits were injected with a solution of single-walled carbon nanotubes — hollow cylinders of pure carbon measuring about a billionth of a meter across — then exposed to two minutes of radio-frequency treatment. The result, researchers said, was the thermal destruction of 100 percent of the tumors. The idea was inspired by John Kanzius, an M.D. Anderson leukemia patient and retired Pennsylvania radio and television station owner. He developed a radio-frequency generator after undergoing chemotherapy and noting its effect on himself and other patients.

Note: For many hopeful new developments in the search for cancer cures,