IGHE and acute basophilic leukemia: The shift toward Th1/Treg cellular responses in the EcN-Ctrl group was associated with reduced Bet v 1- and Phl p 5-specific IgE measured by rat basophil leukemia (RBL) cells degranulation assay as the level of β-hexaminidase, and increased levels of allergen-specific IgG2a.