Inhibition of stimulated cell responses by phorbol esters and other activators of protein kinase C: sites of action |
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Authors: | R I Sha'afi T F Molski |
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Institution: | Department of Physiology, University of Connecticut Health Center, Farmington 06032. |
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Abstract: | The addition of the protein kinase C activator phorbol esters to cell suspension a few minutes prior to stimulation inhibits the agonists-induced biochemical changes and cell responses. This inhibition is prevented by protein kinase C inhibitors. Activation of protein kinase C down regulates the stimulated responses by affecting one or more of the steps in the exitation-response coupling. This includes the receptors, the quanine-nucleotide-binding protein, the activity or distribution of phospholipase C, and other steps. |
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