Guiding Cells with Light and Chemicals: A Toolbox for Dynamic Studies of Cell Migration.

Cell migration is a fundamental biological process central to a number of physiological and pathophysiological events. Traditional genetic and pharmacological approaches have identified crucial molecular regulators of migration, yet they often lack the spatial and temporal resolution required to interrogate the highly dynamic signaling events that govern cell locomotion. Chemogenetic and optogenetic platforms-genetically encoded inducible systems activated by chemical or light stimuli, respectively-have emerged as powerful tools for achieving precise, on-demand control over protein function in living cells. These systems enable researchers to dissect molecular signaling pathways in real time and with subcellular precision, even as cells are actively migrating. Together with advances in de novo protein design, biosensors, and live-cell imaging, inducible molecular tools are transforming our ability to manipulate and elucidate the intricate mechanisms underlying cell motility. Looking forward, the application of these technologies in animal models will be crucial for gaining deeper physiological and pathophysiological insights.