The human histamine H(2) receptor regulates c-jun and c-fos in a differential manner.
The human histamine H(2) receptor regulates c-jun and c-fos in a differential manner.
复制标题
人组胺 H(2) 受体以不同的方式调节 c-jun 和 c-fos。
DOI:
10.1152/ajpcell.2000.278.6.c1246
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
delValle,J
中科院分区:
文献类型:
--
作者:
Wang,LD;Wang,M;Todisco,A;Grand,E;delValle,J
Previously, we demonstrated that activation of the human H2receptor (hH2R) leads to an increase in c-fostranscription and cell proliferation. The purpose of these studies was to examine whether hH2R regulates c-junexpression and, if so, explore the mechanisms by which it does so. Histamine induced an increase in c-junmRNA in human embryonic kidney cells stably transfected with the hH2R (maximal effect: 554.6 ± 86.8% of control). The protein kinase C (PKC) inhibitors staurosporine (10−6M) and GF-109203X (10−6M) significantly inhibited histamine-stimulated c-fosmRNA while not altering c-junexpression. The protein kinase A (PKA) pathway inhibitorsRp-cAMP and protein kinase inhibitor did not affect the action of histamine on c-junor c-fosmRNA. Histamine (10−4M) stimulated extracellularly regulated kinase 2 tyrosine phosphorylation. The specific inhibitor of the mitogen-activated protein (MAP) kinase pathway, PD-98059 (5 × 10−5M), significantly inhibited histamine-induced c-fosand c-junmRNA. Of interest, the p70 S6 kinase inhibitor rapamycin (10−6M) but not wortmannin decreased histamine-stimulated c-junmRNA by 58.5 ± 12% (mean ± SE,n= 4) while not significantly altering c-fosmessage. Histamine (10−4M) also led to an ∼4.5-fold increase in Jun NH2-terminal kinase activity in a PKC-, PKA-, and MAP kinase-independent but rapamycin-sensitive manner. Our findings suggest that histamine stimulates both c-fosand c-junmRNA in a differential manner. PKC is involved in histamine-mediatedc-fosactivation, whereas p70 S6 kinase is important for linkage of this receptor to c-jun.
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