In 2016, researchers at the University of Virginia in Charlottesville genetically engineered a magnetized protein, called Magneto, which is inserted into a virus that's injected into an animal's brain to manipulate neural activity under the remote influence of magnetic fields.

From The Guardian:

Next, the researchers inserted the Magneto DNA sequence into the genome of a virus, together with the gene encoding green fluorescent protein, and regulatory DNA sequences that cause the construct to be expressed only in specified types of neurons. They then injected the virus into the brains of mice, targeting the entorhinal cortex, and dissected the animals' brains to identify the cells that emitted green fluorescence. Using microelectrodes, they then showed that applying a magnetic field to the brain slices activated Magneto so that the cells produce nervous impulses.