Activation of Raf-1 and mitogen-activated protein kinases by erythropoietin and inositolphosphate-glycan in normal erythroid progenitor cells: involvement of protein kinase C.


In this work, we show that erythropoietin and inositolphosphate-glycan activate Raf-1 and the mitogen-activated protein kinases (MAP kinases) in normal erythropoietin-responsive cells. Using a protein kinase C (PKC) activator such as the phorbol ester, 12-O-tetradecanoyl-phorbol-13-acetate and the PKC inhibitor GF109203X, we investigated a possible… (More)


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