ADAMTS1-mediated targeting of TSP-1 by PPARδ suppresses migration and invasion of breast cancer cells.

ADAMTS1-mediated targeting of TSP-1 by PPARδ suppresses migration and invasion of breast cancer cells.
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DOI:
10.18632/oncotarget.21584
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发表时间:
2017-11-07
期刊:
影响因子:
--
通讯作者:
Seo HG
Seo HG
中科院分区:
其他
文献类型:
--
作者:
Ham SA;Yoo T;Lee WJ;Hwang JS;Hur J;Paek KS;Lim DS;Han SG;Lee CH;Seo HG

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癌细胞向周围组织的迁移和侵袭是肿瘤转移的关键阶段。在这里,我们证明了过氧化物酶体增殖物激活受体(PPAR)δ通过血栓反应蛋白-1(TSP-1)及其降解的蛋白水解酶和带有血栓反应蛋白基序的去整合素和金属蛋白酶结构域(ADAMTS1)来调节人乳腺癌细胞的迁移和侵袭。PPARδ的特异性配体GW501516激活PPARδ可显著抑制乳腺癌细胞的迁移和TSP-1的表达。这些作用可被小干扰RNA介导的ADAMTS1下调,表明ADAMTS1参与了PPARδ介导的抑制乳腺癌细胞迁移和TSP-1表达的过程。此外,配体激活的PPARδ通过将PPARδ与ADAMTS1基因启动子中的直接重复序列-1结合,在转录水平上上调了ADAMTS1的表达。此外,配体激活的PPARδ以ADAMTS1依赖的方式抑制乳腺癌细胞的侵袭。综上所述,这些结果表明,PPARδ通过下调TSP-1而抑制乳腺癌细胞的迁移和侵袭,该过程是通过上调ADAMTS-1来实现的。
Migration and invasion of cancer cells into surrounding tissue is a key stage of cancer metastasis. Here, we show that peroxisome proliferator-activated receptor (PPAR) δ regulates migration and invasion of human breast cancer cells via thrombospondin-1 (TSP-1) and its degrading protease, a disintegrin and metalloprotease domains with thrombospondin motifs 1 (ADAMTS1). Activation of PPARδ by GW501516, a specific ligand for PPARδ, led to marked inhibition in the cell migration and TSP-1 expression of breast cancer. These effects were suppressed by small interfering RNA-mediated knock-down of ADAMTS1, indicating that ADAMTS1 is involved in PPARδ-mediated inhibition of migration and TSP-1 expression in breast cancer cells. In addition, ligand-activated PPARδ upregulated expression of ADAMTS1 at the transcriptional level via binding of PPARδ to a direct repeat-1 site within the ADAMTS1 gene promoter. Furthermore, ligand-activated PPARδ suppressed invasion of breast cancer cells in an ADAMTS1-dependent manner. Taken together, these results demonstrate that PPARδ suppresses migration and invasion of breast cancer cells by downregulating TSP-1 in a process mediated by upregulation of ADAMTS1.
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