Medicinal microrobots could help physicians better treat and prevent diseases. But most of these devices are made with synthetic materials that trigger immune responses in vivo. Now, for the first time, researchers reporting in ACS Central Science have used lasers to precisely control neutrophils -; a type of white blood cell -; as a natural, biocompatible microrobot in living fish.
The “neutrobots” performed multiple tasks, showing they could someday deliver drugs to precise locations in the body.
Microrobots currently in development for medical applications would require injections or the consumption of capsules to get them inside an animal or person. But researchers have found that these microscopic objects often trigger immune reactions in small animals, resulting in the removal of microrobots from the body before they can perform their jobs.
Using cells already present in the body, such as neutrophils, could be a less invasive alternative for drug delivery that wouldn’t set off the immune system. These white blood cells already naturally pick up nanoparticles and dead red blood cells and can migrate through blood vessels into adjacent tissues, so they are good candidates for becoming microrobots.
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