TGFβ signaling confers sorafenib resistance via induction of multiple RTKs in hepatocellular carcinoma cells.

TGFβ signaling confers sorafenib resistance via induction of multiple RTKs in hepatocellular carcinoma cells.
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DOI:
10.1002/mc.22592
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发表时间:
2017-04
影响因子:
4.6
通讯作者:
Wu T
Wu T
中科院分区:
医学2区
文献类型:
--
作者:
Ungerleider N;Han C;Zhang J;Yao L;Wu T

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转化生长因子β(Transforming growth factor β,TGFβ)是一种多功能的细胞因子,在肝癌的发生发展中起着重要作用。目前的研究提供了新的证据表明,TGFβ上调多种受体酪氨酸激酶(RTK)的表达,包括IGF1R,EGFR,PDGFβR和FGFR1在人肝细胞癌(HCC)细胞中。这反过来使HCC细胞对单个同源RTK配体敏感,导致细胞存活。我们的数据表明,TGFβ介导的生长因子敏感性增加导致逃避多激酶抑制剂索拉非尼诱导的细胞凋亡。相反,我们观察到,通过LY2157299(一种TGFβRI激酶抑制剂)抑制TGFβ信号通路,在体外增强索拉非尼诱导的细胞凋亡。我们的研究结果揭示了TGFβ和RTK信号通路之间的重要相互作用,这对肝细胞癌细胞存活和对治疗的抵抗至关重要。
Transforming growth factor β (TGFβ) is a multifunctional cytokine which is importantly implicated in hepatocarcinogenesis. The current study provides novel evidence that TGFβ upregulates the expression of multiple receptor tyrosine kinases (RTKs), including IGF1R, EGFR, PDGFβR, and FGFR1 in human hepatocellular carcinoma (HCC) cells. This, in turn, sensitized HCC cells to individual cognate RTK ligands, leading to cell survival. Our data showed that the TGFβ-mediated increase in growth factor sensitivity led to evasion of apoptosis induced by the mutikinase inhibitor, sorafenib. Conversely, we observed that inhibition of the TGFβ signaling pathway by LY2157299, a TGFβRI kinase inhibitor, enhanced sorafenib-induced apoptosis, in vitro. Our findings disclose an important interplay between TGFβ and RTK signaling pathways, which is critical for hepatocellular cancer cell survival and resistance to therapy.
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