Scientists have developed nanoparticles that can be used to transport drugs against blood flow.
Previously, researchers have already presented various options for 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, consisting of iron oxide and polymer.
During the tests, they were placed in a glass tube with an inner diameter similar to human blood vessels. Liquid also flowed through it.. Using magnetic field, the researchers grouped the nanocapsules into «Roy», and then, using ultrasonic pulses, they were moved against the flow near the walls, where it is weaker.
Microrobots roll against blood flow to deliver drugs
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 the implant for the delivery and activation of photosensitive drugs.
text: Ilya Bauer, photo and video: ETH Zurich