Nanotech robots deliver gene therapy through blood - Reuters (article link)

(Reuters) - U.S. researchers have developed tiny nanoparticle robots that can travel through a patient's blood and into tumors where they deliver a therapy that turns off an important cancer gene.
- Researchers used nanotechnology -- the science of really small objects -- to create tiny polymer robots covered with a protein called transferrin that seek out a receptor or molecular doorway on many different types of tumors.
- Once the particles find the cancer cell and get inside, they break down, releasing small interfering RNAs or siRNAs that block a gene that makes a cancer growth protein called ribonucleotide reductase.