Title : Effect of phorbol ester on phosphoinositide hydrolysis and calcium mobilization induced by endothelin-1 in cultured canine tracheal smooth muscle cells.

Pub. Date : 1995 Feb

PMID : 7736562






6 Functional Relationships(s)
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1 Pretreatment of TSMCs with phorbol 12-myristate 13-acetate (PMA, 1 microM) for 30 min blocked the ET-1-induced IP3 formation and Ca2+ mobilization. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris
2 Pretreatment of TSMCs with phorbol 12-myristate 13-acetate (PMA, 1 microM) for 30 min blocked the ET-1-induced IP3 formation and Ca2+ mobilization. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris
3 Following preincubation, ET-1-induced Ca2+ mobilization recovered with time and reached the same extent of control cells within 48 h. The concentrations of PMA that gave half-maximal inhibition (-logEC50) of ET-1-induced IP3 formation and increase in [Ca2+]i were 8.6 and 8.4 M, respectively. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris
4 Following preincubation, ET-1-induced Ca2+ mobilization recovered with time and reached the same extent of control cells within 48 h. The concentrations of PMA that gave half-maximal inhibition (-logEC50) of ET-1-induced IP3 formation and increase in [Ca2+]i were 8.6 and 8.4 M, respectively. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris
5 Prior treatment of TSMCs with staurosporine (1 microM), a PKC inhibitor, inhibited the ability of PMA to attenuate ET-1-induced responses, suggesting that the inhibitory effect of PMA is mediated through the activation of PKC. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris
6 In parallel with the effect of PMA on the ET-1-induced IP3 formation and Ca2+ mobilization, a change of PKC activity was observed in TSMCs. Tetradecanoylphorbol Acetate endothelin 1 Canis lupus familiaris