On the hunt for rare cancer cells
In the first part of this video, a particle covered with DNA strands that can bind to a protein found on cancer cells approaches a cell. Though the particle does not directly contact the cell, the DNA strands entangle the cell, as demonstrated when the particle is pulled away and the cell is pulled toward the particle.
In the second part, a particle covered with small molecules that target the same cancer protein does not achieve the same strong binding, even though it comes in direct contact with the cell.
Read more about this research at MIT News: http://web.mit.edu/newsoffice/2012/capturing-rare-cancer-cells-1112.html
Wesley Wong, Harvard Medical School