Interesting tech developments in nanotech, nanostructured materials, etc.
Ken Novak's Weblog
Tuesday, November 04, 2003
Gold "nano-bullets" shoot down tumours "The tiny silica particles are plated with gold and heat up when near infrared light (NIR) is shone on them. This kills the cancer cells... Body tissues are essentially transperant to NIR...
The Rice University team created nanoparticles from a non-conducting core of silica with a diameter of 110 nanometres and a 10 nm thick metal shell. Gold was used because it is biologically inert. When the nanoshells were added to human breast cancer cells in the test tube, and then exposed to both NIR, 100 per cent were killed, says West. "And we saw no changes in cell viability with just nanoshells or just the laser - it's a true on/off situation." The team also injected the nanoshells directly into the tumours of living mice and applied NIR. The tumours were destroyed within days. ..
The team has now engineered the nanoshells to specifically target tumour cells. In a recent study, submitted to Cancer Letters, they injected mice with nanoshells attached to an antibody that only binds to cancer cells. She says the tumours were "completely destroyed" and 150 days later the mice were alive and well with no tumour growth." The heat from the nanoshells makes holes in the cancer cell walls to kill them. 7:35:11 AM
Copyright 2005 © Ken Novak.Last update: 11/24/2005; 11:38:58 PM.
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