- Prostaglandin E2 induces MUC8 gene expression via a mechanism involving ERK MAPK/RSK1/cAMP response element binding protein activation in human airway epithelial cells. Cho, K.N., Choi, J.Y., Kim, C.H., Baek, S.J., Chung, K.C., Moon, U.Y., Kim, K.S., Lee, W.J., Koo, J.S., Yoon, J.H. J. Biol. Chem. (2005)