FOXO3a promotes gastric cancer cell migration and invasion through the induction of cathepsin L.

FOXO3a promotes gastric cancer cell migration and invasion through the induction of cathepsin L.
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DOI:
10.18632/oncotarget.8977
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发表时间:
2016-06-07
期刊:
影响因子:
--
通讯作者:
Liu T
Liu T
中科院分区:
其他
文献类型:
--
作者:
Yu S;Yu Y;Zhang W;Yuan W;Zhao N;Li Q;Cui Y;Wang Y;Li W;Sun Y;Liu T

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叉头盒O3 A(FOXO 3a)是一种重要的转录因子,参与多种人类肿瘤的发生。然而,FOXO 3a在调节胃癌细胞侵袭和转移中的作用尚未阐明。在此,我们报道FOXO 3a过表达通过上调组织蛋白酶L促进胃癌细胞的迁移和侵袭。FOXO 3a基因敲低抑制胃癌细胞的迁移和侵袭,并下调组织蛋白酶L的表达。沉默这些细胞中的组织蛋白酶L抑制FOXO 3a过表达诱导的细胞迁移和侵袭。机制研究表明,FOXO 3a增加组织蛋白酶L启动子激活,组织蛋白酶L过表达抑制E-钙粘蛋白表达,导致胃癌细胞进行上皮间质转化(EMT)。我们的数据揭示了FOXO 3a通过调节参与细胞外基质(ECM)降解和EMT的蛋白质在胃癌侵袭中的一种以前未探索的功能。我们认为FOXO 3a可能具有预后价值,并可能成为阻断肿瘤转移的潜在治疗靶点。
Forkhead box O3A (FOXO3a) is an important transcription factor involved in various human cancers. However, the role of FOXO3a in regulating the invasion and metastasis of gastric cancer cells has not been clarified. Here, we report that FOXO3a overexpression promoted migration and invasion of gastric cancer cells by upregulating cathepsin L. FOXO3a knockdown suppressed migration and invasion and also downregulated cathepsin L expression in gastric cancer cells. Silencing cathepsin L in these cells suppressed FOXO3a overexpression-induced cell migration and invasion. Mechanistic studies revealed that FOXO3a increased cathepsin L promoter activation, and cathepsin L overexpression repressed E-cadherin expression, causing gastric cancer cells to undergo epithelial-mesenchymal transition (EMT). Our data reveal a previously unexplored function of FOXO3a in gastric cancer invasion by regulating proteins involved in extracellular matrix (ECM) degradation and EMT. We suggest that FOXO3a may be of prognostic value and a potential therapeutic target in blocking tumor metastasis.
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