Emedastine Inhibits Th1 and Th2 Cell Differentiation Mediated by Mast Cells.

We have previously clarified that emedastine, a second-generation antihistamine drug, inhibits T helper 1(Th1)/Th2 cell differentiation mediated by Langerhans cells (LCs). In addition, although we have recently found that mast cells also function as antigen-presenting cells (APCs) and induce Th1/Th2 cell differentiation, any influence of emedastine on this function remained unclear. Here we investigated the influence of emedastine on Th1/Th2 cell differentiation via mast cells.