New nano-robot removes germs and toxins from the blood

American researchers have developed a nano-robot that can be moved by ultrasound in the blood to remove germs and their toxins, which is expected to be a safe and effective means of detoxification in the future. The University of California, San Diego, published a report in the new issue of Science and Robotics, saying that the robot developed by the school has successfully eliminated a “superbug” and toxin from the blood sample. . The new robot is made of gold nanowires and has a width of about one-fifth of that of human hair. The surface has a special mixed cell membrane coating, which is composed of human platelets and red blood cell membranes.

The mixed cell membrane coating possesses a variety of functional proteins on the surface of platelets and red blood cells, and thus has some biological functions to bind to pathogens and remove toxins. The gold nanowires move in the liquid under the influence of ultrasound, promoting their effective binding to the target. It moves in the blood like natural cells at speeds of up to 35 microns per second.

The researchers selected blood samples contaminated with methicillin-resistant Staphylococcus aureus as “super bacteria” and found that after 5 minutes of treatment with nano-robots, the levels of pathogens and toxins in the blood samples were significantly higher than those of untreated blood samples. reduce. The research is still in its early stages, and researchers hope to use this robot to develop a universal detoxification method for a variety of situations. Next they will test in living organisms and seek to replace gold with biodegradable materials.