Mixed lineage kinase 3 is required for matrix metalloproteinase expression and invasion in ovarian cancer cells.

Mixed lineage kinase 3 is required for matrix metalloproteinase expression and invasion in ovarian cancer cells.
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混合谱系激酶3是基质金属蛋白酶表达和卵巢癌细胞浸润所必需的。

DOI:
10.1016/j.yexcr.2012.05.002
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发表时间:
2012-08-15
影响因子:
3.7
通讯作者:
Chadee DN
Chadee DN
中科院分区:
医学3区
文献类型:
--
作者:
Zhan Y;Abi Saab WF;Modi N;Stewart AM;Liu J;Chadee DN

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混合谱系激酶3(MLK 3)是一种促分裂原活化蛋白激酶(MAP 3 K),其激活MAPK信号通路并调节细胞应答,如增殖、迁移和凋亡。在这里,我们报告高水平的总和磷酸化MLK 3在卵巢癌细胞系相比,永生化的非致瘤性卵巢上皮细胞系。利用小干扰RNA(siRNA)介导的基因沉默,我们确定MLK 3是SKOV 3和HEY 1B卵巢癌细胞侵袭所必需的。此外,mlk 3沉默显著降低了SKOV 3和HEY 1B卵巢癌细胞中基质金属蛋白酶(MMP)-1、-2、-9和-12基因表达以及MMP-2和-9活性。MMP-1、MMP-2、MMP-9和MMP-12的表达以及MLK 3诱导的MMP-2和MMP-9的活化需要细胞外信号调节激酶(ERK)和c-Jun N-末端激酶活性。此外,抑制激活蛋白-1(AP-1)可降低MMP-1、MMP-9和MMP-12基因表达。总的来说,这些发现确立了MLK 3作为卵巢癌细胞中MMP表达和侵袭的重要调节因子。
Mixed lineage kinase 3 (MLK3) is a mitogen-activated protein kinase kinase kinase (MAP3K) that activates MAPK signaling pathways and regulates cellular responses such as proliferation, migration and apoptosis. Here we report high levels of total and phospho-MLK3 in ovarian cancer cell lines in comparison to immortalized nontumorigenic ovarian epithelial cell lines. Using small interfering RNA (siRNA)-mediated gene silencing, we determined that MLK3 is required for the invasion of SKOV3 and HEY1B ovarian cancer cells. Furthermore, mlk3 silencing substantially reduced matrix metalloproteinase (MMP) -1, -2, -9 and -12 gene expression and MMP-2 and -9 activities in SKOV3 and HEY1B ovarian cancer cells. MMP-1, -2, -9 and-12 expression, and MLK3-induced activation of MMP-2 and MMP-9 requires both extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase activities. In addition, inhibition of activator protein-1 (AP-1) reduced MMP-1, MMP-9 and MMP-12 gene expression. Collectively, these findings establish MLK3 as an important regulator of MMP expression and invasion in ovarian cancer cells.
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