This research aims to understand how inflammatory cues regulate the cellular responses of different cells implicated in inflammation. The main hypothesis is that non-muscle myosin II (NMII) is a central integrator of the different types of extracellular signals produced during the inflammatory response. The precise goal of the present proposal is to understand the regulation and function of the three NMII isoforms in the migration of cells implicated in inflammation, chiefly blood immune cells and cells that drive tissue repair and remodelling (fibroblasts) and vascularization (endothelial cells). This research will address the following objectives: 1) Identify specific kinases, phosphatases and regulatory sites that regulate NMII activation and assembly in a cell type-, stimulus-, isoform- and spatiotemporal-dependent manner. 2) Determine the signalling events and pathways through which the NMII isoforms control the response to inflammatory cues. 3) Elucidate whether the differences in expression and regulation of NMII underlie the different roles of these cells during inflammation. Successful completion of these objectives will provide novel insights on the basic cellular mechanisms of inflammation and bears potential to identify new therapeutic targets.