Objective To study the regulation of MAPK signal pathway in cystic epithelial cells of jck mice with polycystic kidney disease.Methods Expression regulations of components in MAPK signal pathway were analyzed using Western blotting.Results MAPK signal pathway proteins H-Ras,p-Raf,p-MEK,pERK and c-fos were up-regulated in renal cystic epithelial cells of jck mice with polycystic kidney disease.Conclusion The MAPK signal pathway is involved in cyst development,which indicates that MAPK signal pathway may be a...