Hypoxia induces miR-153 through the IRE1α-XBP1 pathway to fine tune the HIF1α/VEGFA axis in breast cancer angiogenesis.

Hypoxia induces miR-153 through the IRE1α-XBP1 pathway to fine tune the HIF1α/VEGFA axis in breast cancer angiogenesis.
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缺氧通过 IRE1 α-XBP1 通路诱导 miR-153 微调乳腺癌血管生成中的 HIF1 α/VEGFA 轴

DOI:
10.1038/s41388-017-0089-8
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发表时间:
2018-04
期刊:
影响因子:
8
通讯作者:
Chen C
Chen C
中科院分区:
医学1区
文献类型:
--
作者:
Liang H;Xiao J;Zhou Z;Wu J;Ge F;Li Z;Zhang H;Sun J;Li F;Liu R;Chen C

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有充分证据表明,缺氧会激活缺氧诱导因子 1-α (HIF1α)/血管内皮生长因子 A (VEGFA) 轴,从而促进乳腺癌中的血管生成。然而,目前尚不清楚该轴是如何受到负面调节的。在本研究中,我们证明miR-153通过与HIF1A mRNA的3'UTR结合直接抑制HIF1α的表达,并通过减少VEGFA的分泌来抑制原代人脐静脉内皮细胞(HUVEC)的管形成和乳腺癌血管生成。重要的是,缺氧刺激的内质网应激会诱导 miR-153 的表达,从而激活 IRE1α 及其下游转录因子 X-box 结合蛋白 1 (XBP1)。 X-box 结合蛋白 1 直接结合 miR-153 宿主基因 PTPRN 的启动子并激活转录。这些结果表明,缺氧诱导 miR-153 微调乳腺癌血管生成中的 HIF1α/VEGFA 轴,miR-153 可用于乳腺癌抗血管生成治疗。
It is well documented that hypoxia activates the hypoxia-inducible factor 1-alpha (HIF1α)/vascular endothelial growth factor A (VEGFA) axis to promote angiogenesis in breast cancer. However, it is unclear how this axis is negatively regulated. In this study, we demonstrated that miR-153 directly inhibits expression of HIF1α by binding to the 3′UTR of HIF1A mRNA, as well as suppresses tube formation of primary human umbilical vein endothelial cells (HUVECs) and breast cancer angiogenesis by decreasing the secretion of VEGFA. Importantly, expression of miR-153 was induced by hypoxia-stimulated ER stress, which activates IRE1α and its downstream transcription factor X-box binding protein 1 (XBP1). X-box binding protein 1 directly binds to the promoter of the miR-153 host gene PTPRN and activates transcription. These results indicate that hypoxia induces miR-153 to fine tune the HIF1α/VEGFA axis in breast cancer angiogenesis and miR-153 could be used for breast cancer anti-angiogenesis therapy.
DOI: 10.18632/oncotarget.8831
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