Shenjian Ai, MD, PhD

Graduate student

Washington University in St. Louis (WU)

My laboratory studies the pathogenesis of neuroinflammatory diseases of the central nervous system (CNS). We have focused on two components of CNS inflammatory states: the mechanism of leukocyte recruitment into the CNS and the direct effects of inflammatory mediators on resdient neural cells. Common to both of these is the action of chemokines, which both recruit leukocytes into the CNS and signal through chemokine receptors present on neural cells, affecting their function and survival. Our experimental approach involves the development of in vitro and in vivo models of CNS mononuclear cell recruitment and neural cell chemokine receptor signaling responses. Our studies over the past few years have led us to focus on the roles of cytokines and chemokines in the regulation of blood-brain barrier permeability to protective versus pathogenic leukocytes, and to West Nile virus (WNV), a positive strand flavivirus that may enter the CNS and cause encephalitis.