Signal transduction events involved in TPA downregulation of SP-A gene expression.
Signal transduction events involved in TPA downregulation of SP-A gene expression.
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信号转导事件涉及 TPA 下调 SP-A 基因表达。
DOI:
10.1152/ajplung.00416.2003
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
Snyder,JeanneM
中科院分区:
文献类型:
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作者:
Miakotina,OlgaL;Snyder,JeanneM
Surfactant protein A (SP-A), the most abundant pulmonary surfactant protein, plays a role in innate host defense and blocks the inhibitory effects of serum proteins on surfactant surface tension-lowering properties. SP-A mRNA and protein are downregulated by phorbol esters (TPA) via inhibition of gene transcription. We evaluated the TPA signaling pathways involved in SP-A inhibition in a lung cell line, H441 cells. TPA caused sustained phosphorylation of p44/42 mitogen-activated protein kinase (MAPK), p38 MAPK, and c-Jun-NH2-terminal kinase. An inhibitor of conventional and novel isoforms of protein kinase C (PKC) and two inhibitors of p44/42 MAPK kinase partially or completely blocked the inhibitory effects of TPA on SP-A mRNA levels. In contrast, inhibitors of conventional PKC-α and -β, stress-activated protein kinases, protein phosphatases, protein kinase A, and the phosphatidylinositol 3-kinase pathway had no effect on the TPA-mediated inhibition of SP-A mRNA. TPA also stimulated the synthesis of c-Jun mRNA and protein in a time-dependent manner. Inhibitors of the p44/42 MAPK signaling pathway and PKC blocked the TPA-mediated phosphorylation of p44/42 MAPK and the increase in c-Jun mRNA. We conclude that TPA inhibits SP-A gene expression via novel isoforms of PKC, the p44/42 MAPK pathway, and the activator protein-1 complex.
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影响因子:
4.8
作者:
Dekowski,SA;Snyder,JM
通讯作者:
Snyder,JM
DOI:
10.1152/ajplung.00125.2001
发表时间:
2002-02-01
影响因子:
4.9
作者:
Vuong, H;Patterson, T;Reddy, SPM
通讯作者:
Reddy, SPM
影响因子:
3.5
作者:
Ulrika Trollér;R. Zeidman;K. Svensson;C. Larsson
通讯作者:
C. Larsson
影响因子:
5.6
作者:
Heidi Schultz;K. Engel;M. Gaestel
通讯作者:
M. Gaestel
DOI:
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发表时间:
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期刊:
影响因子:
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作者:
通讯作者:
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