> The first time a potential allergen enters the body, some people respond by making allergen-specific IgE antibodies. These antibodies stick around long after the initial allergen is cleared from the body. Most of the antibodies get snagged by IgE-specific receptors called FcRs, which are exposed on the surface of mast cells. The mast cells are then primed to react the next time a person encounters the allergen.
“It would be an incredible intervention if you could rapidly disconnect IgE antibodies in the midst of an acute allergic response,” said Ted Jardetzky, PhD, professor of structural biology and senior investigator for the study. It turns out the inhibitor used by the team does just that. A myriad of allergens, ranging from ragweed pollen to bee venom to peanuts, can set off IgE antibodies, resulting in allergic reactions within seconds. The new inhibitor destroys the complex that tethers IgE to the cells responsible for the reaction, called mast cells. Severing this connection would be the holy grail of IgE-targeted allergy treatment. <
Via Dr. Stefan Gruenwald