DNA Origami might allow for drug delivery.

esinclair writes: As reported in Nature News, researchers have designed a method which allows DNA strands to be formed into cubes and other designs by oligonucleotides. The uses of this DNA Origami are still being developed. One possibility for them is to be used as a drug delivery system. The fact that scientists have also come up with a method to lock these structures and use "keys" to unlock them would conceivably allow for a controlled delivery system.