Wait, Did This 15-Year-Old From Maryland Just Change Cancer Treatment?
"His name is Jack Andraka, and he loves science and engineering with every inch of his 15-year-old soul...Andraka’s diagnostic breakthrough is a humble piece of filter paper, except that it is dipped in a solution of carbon nanotubes, which are hollow cylinders with walls the thickness of a single atom, coated with a specific antibody designed to bind with the virus or protein you’re looking for. Andraka’s key insight is that there are noticeable changes in the electrical conductivity of the nanotubes when the distances between them changes. When the antibodies on the surface of the nanotubes come in contact with a target protein, the proteins bind to the tubes and spread them apart a tiny bit. That shift in the spaces between tubes can be detected by an electrical meter. Andraka used a $50 meter from the Home Depot to do the trick but, he says, doctors can just as easily insert his test-strips into the kinds of devices used by millions of diabetics around the world."
"It’s also 100 times more selective than existing diagnostic tests, which means no false positives or false negatives. It ignored healthy patient samples as well as those with mere pancreatitis. Compared with the 60-year-old diagnostic technique called enzyme-linked immunosorbent assay (or ELISA), used in pregnancy test strips and viral checks for HIV, West Nile and hepatitis B, Andraka’s sensor is 168 times faster, 26,667 times less expensive, and 400 times more sensitive. It can spot the presence of the cancer-linked protein well before the cancer itself becomes invasive. This could save the lives of thousands of pancreatic cancer victims each year. The sensor costs $3 (ELISA can cost up to $800) and ten tests can be performed per strip, with each test taking five minutes. It can be used also to monitor resistance to antibiotics and follow the progression of treatment of cancer patients undergoing chemotherapy or radiation."
Amazing.
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