The level of IgE produced by a B cell is regulated by norepinephrine in a p38 MAPK- and CD23-dependent manner.
Pongratz G, McAlees JW, Conrad DH, Erbe RS, Haas KM, Sanders VM. The level of IgE produced by a B cell is regulated by norepinephrine in a p38 MAPK- and CD23-dependent manner. J Immunol. 2006 Sep 01; 177(5):2926-38.