FCER1A and allergic disease: FcεRI signalling molecules activated by antigens such as Syk, Lyn, LAT, Gab2, and PLCγ2 and downstream Akt and MAP kinases were also inhibited, but the level of cAMP in mast cells increased, which reveals that H. cordata can improve allergic diseases by inhibiting the FcεRI-dependent signal transmission of mast cells (Li et al., 2005; Han et al., 2009).