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  • Title: Phorbol ester dissociates endothelin-stimulated phosphoinositide hydrolysis and arachidonic acid release in vascular smooth muscle cells.
    Author: Reynolds EE, Mok LL, Kurokawa S.
    Journal: Biochem Biophys Res Commun; 1989 Apr 28; 160(2):868-73. PubMed ID: 2541716.
    Abstract:
    Endothelin-stimulated [3H]-inositol phosphate formation and [3H]-arachidonic acid release were measured in cultured vascular smooth muscle cells from rabbit renal artery. Both responses were partially inhibited by pretreatment with pertussis toxin, indicating the involvement of pertussis toxin-sensitive guanine nucleotide binding regulatory proteins in the coupling processes. Pretreatment with the phorbol ester PMA inhibited endothelin-stimulated [3H]-inositol phosphate formation, but potentiated endothelin-stimulated [3H]-arachidonic acid release, suggesting that these two coupling processes occur in a parallel and independent manner in vascular smooth muscle cells.
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