Personalized microrobots swim through biological barriers, deliver drugs to cells

Biohybrid robots on the micrometer scale can swim through the body and deliver drugs to tumors or provide other cargo-carrying functions. To be successful, they must consist of materials that can pass through the body’s immune response, swim quickly through viscous environments and penetrate tissue cells to deliver cargo. Researchers fabricated biohybrid bacterial microswimmers by combining a genetically engineered E. coli MG1655 substrain and nanoerythrosomes, small structures made from red blood cells.

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