MIT researchers published a Nature Biotechnology paper describing microscopic, wireless bioelectronic devices fused with immune cells that autonomously home to inflamed brain regions after intravenous injection and provide focal neuromodulation. The cell‑electronics hybrids cross the blood–brain barrier, self‑implant at target sites, and are wirelessly powered to stimulate neurons within microns of the implant. Demonstrated in mice, the method aims to enable less invasive neuromodulation therapies for neuroinflammation and other disorders; authors highlight biocompatibility and potential to avoid surgery, though translational steps remain significant.