MPAPO promotes corneal epithelial cell proliferation and injury repair in mice. (A) The effects of different concentrations (0, 1, 10, 100, 1000 and 10000 nM) of MPAPO on the proliferation of normal corneal epithelial cells were investigated. (B) The repair effects of 0, 1, 10, 100, 1000 and 10000 nM MPAPO on injured corneal epithelial cells were studied. (C) Different experimental treatments promote corneal epithelial cell proliferation after injury (MAX.D.4 is a specific inhibitor of PAC1). *P<0.05, **P<0.01 compared to the 0 nM or PBS group; #P<0.05, ##P<0.01 compared to the NC group. n=3.