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- W1979366917 abstract "We have shown previously that angiotensin‐II (A‐II) controls proto‐oncogene (c‐ fos, jun ‐B and c‐ jun ) mRNA accumulation in bovine adrenal fasciculata cells (BAC). Since BAC contain both subtypes (AT‐1 and AT‐2) of the A‐II receptor, we have investigated which subtype was involved in the effect of A‐II on proto‐oncogene mRNA by using a selective antagonist for AT‐1 (DUP 753) and for AT‐2 (CGP 42112A). DUP 753, but not CGP 421 12A, inhibited the stimulatory effect of A‐II on proto‐oncogene mRNA, with ID 3d s of 4 × 10 −7 M, 7 × 10 −7 M and 2 × 10 −6 M for c‐ fos, jun ‐B and c‐ jun , respectively. Neither of the two antagonists by themselves had a direct effect on proto‐oncogene mRNA. As the A‐II AT‐1 receptors are coupled to the phospholipase C system in BAC, we have investigated whether the A‐II effects on the proto‐oncogenes were mediated by protein kinase C (PKC) or by Ca 2+ calmodulin. First, activation of PKC by the phorbol ester, PMA, increased the level of the three proto‐oncogene mRNAs, whereas calcium ionophore had no effect. Second, staurosporine, a specific inhibitor of PKC, reduced the stimulatory action of A‐II on proto‐oncogene mRNA by 80–90%, whereas trifluoroperazine, an inhibitor of calmodulin, had no significant effect. These results demonstrate that the effects of A‐II on proto‐oncogene mRNA are mediated by AT1 receptor subtypes, mainly through activation of the PKC pathway." @default.
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- W1979366917 date "1992-11-16" @default.
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- W1979366917 title "Angiotensin-II-induced expression of proto-oncogene (c-<i>fos</i>,<i>jun</i>-B and c-<i>jun</i>) mRNA in bovine adrenocortical fasciculata cells (BAC) is mediated by AT-1 receptors" @default.
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- W1979366917 doi "https://doi.org/10.1016/0014-5793(92)81180-t" @default.
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