Mcl-1 stabilization confers resistance to taxol in human gastric cancer.

Mcl-1 stabilization confers resistance to taxol in human gastric cancer.
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Mcl-1 稳定化赋予人胃癌紫杉醇耐药性

DOI:
10.18632/oncotarget.20222
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发表时间:
2017-10-10
期刊:
影响因子:
--
通讯作者:
Hu W
Hu W
中科院分区:
其他
文献类型:
--
作者:
Shuang W;Hou L;Zhu Y;Li Q;Hu W

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紫杉醇是一种广泛应用于治疗胃癌的抗癌药物。然而,获得性耐药性总是发展,并极大地限制了紫杉醇的治疗效果。潜在的耐药机制的鉴定可能会为胃癌紫杉醇治疗的新疗法的开发提供信息。在这里,我们报告了Mcl-1(髓样细胞白血病-1)的上调赋予人胃癌对紫杉醇的获得性耐药。由于PI 3 K/Akt信号通路的过度激活,Mcl-1显示在紫杉醇抗性胃癌细胞中稳定。增加的Mcl-1阻止线粒体外膜的透化,从而阻断紫杉醇诱导的细胞凋亡。抑制Mcl-1或PI 3 K/Akt通路可显著逆转泰素耐药人胃癌细胞的耐药表型。综上所述,我们的研究结果拓宽了PI 3 K/Akt通路作为泰素获得性耐药的重要调节因子的观点,并暗示Mcl-1作为治疗泰素耐药的人胃癌的特异性治疗靶点。
Taxol has been extensively used as an antineoplastic drug to treat human gastric cancer. However, the acquired drug resistance invariably develops and greatly limits the therapeutic efficacy of Taxol. Identification of the underlying resistance mechanisms may inform the development of new therapies of gastric cancers to Taxol treatment. Here we report that upregulation of Mcl-1 (Myeloid cell leukemia-1) confers acquired resistance to Taxol in human gastric cancer. Mcl-1 is shown to be stabilized in Taxol -resistant gastric cancer cells because of the hyper-activation of the PI3K/Akt signaling pathway. The increased Mcl-1 prevents of the permeabilization of the outer mitochondrial membrane, thereby blocking the Taxol-induced apoptosis. Furthermore, inhibition of Mcl-1 or PI3K/Akt pathway significantly reversed the resistant phenotype of Taxol-resistant human gastric cancer cells. Taken together, our findings broaden the view of PI3K/Akt pathway as an important regulator in Taxol acquired resistance, and implicate Mcl-1 as a specific therapeutic target for the treatment of Taxol-resistant human gastric cancer.
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发表时间: 2016-11-01
影响因子: 3
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DOI: 10.1371/journal.pone.0040008
发表时间: 2012
期刊: PloS one
影响因子: 3.7
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