New technology allows drug delivery against blood flow
Scientists have developed nanoparticles that can be used to transport drugs against the bloodstream.
Previously, researchers have already presented various versions of nanoscopic capsules for targeted delivery of substances to a specific point in the body, but they all moved only “with the flow.” Now a team from the Swiss Higher Technical School of Zurich has created magnetic balls with a diameter of 3 microns, composed of iron oxide and polymer.
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During the tests, they were placed in a glass tube with an internal diameter similar to that of human blood vessels. Liquid also flowed through it. Using a magnetic field, the researchers grouped the nanocapsules into a swarm, and then, using ultrasonic pulses, moved them upstream near the walls, where it is weaker.
According to scientists, in the future, such balls can be used not only for accurate drug delivery, but also for microsurgical procedures.
We also previously reported on the development of an implant for the delivery and activation of photosensitive drugs.
, photo and video: ETH Zurich