Bufalin suppresses the proliferation and metastasis of renal cell carcinoma by inhibiting the PI3K/Akt/mTOR signaling pathway.

Bufalin suppresses the proliferation and metastasis of renal cell carcinoma by inhibiting the PI3K/Akt/mTOR signaling pathway.
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DOI:
10.3892/ol.2018.9111
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发表时间:
2018-09
期刊:
影响因子:
2.9
通讯作者:
Huang P
Huang P
中科院分区:
医学4区
文献类型:
--
作者:
Xie J;Lin W;Huang L;Xu N;Xu A;Chen B;Watanabe M;Liu C;Huang P

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蟾毒灵是中药蟾毒的活性成分之一,对多种癌症具有显着的抗肿瘤活性。然而,蟾毒灵在肾细胞癌(RCC)中的作用仍不清楚。本研究证实蟾蜍灵通过上调p21 waf/cip 1和E-cadherin,下调细胞周期蛋白依赖性激酶1、细胞周期蛋白B1、N-cadherin和缺氧诱导因子-1 α(HIF-1α)的表达,抑制人肾癌ACHN细胞增殖,阻滞细胞周期于G2/M期,减少转移。进一步的机制研究表明,蟾蜍灵减少磷酸化(磷酸)-Akt和磷酸化哺乳动物雷帕霉素靶蛋白(mTOR)的表达。此外,HIF-1α的表达可能通过抑制磷脂酰肌醇3-激酶(PI 3 K)/蛋白激酶B(Akt)/mTOR信号通路来调节。因此,本研究结果表明蟾毒灵诱导细胞周期阻滞并抑制转移;该过程可能与PI 3 K/Akt/mTOR信号通路有关。因此,蟾蜍灵是一种治疗肾细胞癌的药物。
Bufalin, one of the active ingredients of the Chinese drug Chan su, exhibits significant antitumor activity against various cancer types. However, the role of bufalin in renal cell carcinoma (RCC) remains unclear. In the present study, it was demonstrated that bufalin inhibited cell proliferation, blocked the cell cycle in the G2/M phase, and reduced the metastasis of human RCC ACHN cells via the upregulation of p21waf/cip1 and E-cadherin and the downregulation of cyclin dependent kinase 1, cyclin B1, N-cadherin, and hypoxia-inducible factor-1α (HIF-1α). Further mechanistic study revealed that bufalin reduced the expression of phosphorylated (phospho)-Akt and phospho-mammalian target of rapamycin (mTOR). Moreover, HIF-1α expression may be regulated through the inhibition of the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt)/mTOR signaling pathway. Thus, the present results suggest that bufalin induces cell cycle arrest and suppresses metastasis; this process may be associated with the PI3K/Akt/mTOR signaling pathway. Accordingly, it is suggested that bufalin is a therapeutic agent for RCC.
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