The design of the nanobots is such that it won't incite an immune response. They were modeled after the body's natural immune system. The nanobots patrol the blood stream, much like white blood cells, and immediately report to any signs of distress. Since DNA is biodegradeable and biocompatible, it will eventually break down and avoid a foreign body immune response. The older version, from the 2012 Science magazine description, is shaped like a hexagonal tube with a latched hinge. When a targeted cell is recognized, the latch swings open (like Pac-Man) and deliver deadly drugs or nanoparticles to the targeted cell. The nanoparticles (mostly) cause the cancer cells to self-destruct. The newly revamped version, published in Nature magazine and practiced on cockroaches, resemble boxes with lids. These "boxes" were created using DNA strands, and inside the "box" were molecules that contained hemolymphs.
A photo of the first version of the nanobots from 2012. |
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The revamped version of the nanorobots injected into cockroaches. |
This is revolutionary in the nanotechnology world. While nanotechnology has existed since the 1980's, there has yet to be such a medical wonder. However, there are some risks associated with this process in human beings. Some cancers actually invade an entire organ, rather than just floating around in the bloodstream or existing on the epithelial tissue. If these nanobots are programmed to take out the cancer cells, they could (theoretically) destroy an entire organ in the process. If the nanobots are so rapid at destroying a slowly developing cancer, they could wipe out a substantial amount of an organ before it has time to repair itself. If the nanobots are to be successful, their destruction rate of cancer tissue should be equal with the regeneration rate of healthy tissue.
Another concern I have is that this technology can be used, if in the wrong hands, to destroy healthy cells. There are plenty of terrorist organizations in this world that are leaning more and more towards bio-terrorism. Rather than a widespread poison, like anthrax or cyanide, these little nanobots could easily make their way into human bodies and destroy an entire country, if not more. Perhaps not by means of injection, but ingestion or inhalation. It's worrisome and scary, but it is always a possibility that things created for the good of humanity can be altered for the evil.
Original Article: Can DNA Nanobots Successfully Treat Cancer Patients? First Human Trial Soon
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