- Stat6 signaling promotes protective immunity against Trichinella spiralis through a mast cell- and T cell-dependent mechanism. Urban, J.F., Schopf, L., Morris, S.C., Orekhova, T., Madden, K.B., Betts, C.J., Gamble, H.R., Byrd, C., Donaldson, D., Else, K., Finkelman, F.D. J. Immunol. (2000)