ATM and LKB1 dependent activation of AMPK sensitizes cancer cells to etoposide-induced apoptosis.

ATM and LKB1 dependent activation of AMPK sensitizes cancer cells to etoposide-induced apoptosis.
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DOI:
10.1016/j.canlet.2012.08.034
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发表时间:
2013-01-01
期刊:
影响因子:
9.7
通讯作者:
Luo, Zhijun
Luo, Zhijun
中科院分区:
医学1区
文献类型:
--
作者:
Luo, Lingyu;Huang, Wei;Tao, Rong;Hu, Ningyan;Xiao, Zhi-Xiong;Luo, Zhijun

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本研究旨在探讨AMPK对足叶乙甙诱导的肿瘤细胞凋亡的影响。我们的研究结果表明,依托泊苷诱导AMPK激活前列腺C4-2癌细胞,ATM siRNA减弱的事件。在缺乏LKB 1的A549细胞中,AMPK不能被依托泊苷激活,通过引入LKB 1可以恢复。同样地,沉默C4-2细胞中的LKB 1损害AMPK活化。最后,依托泊苷在具有功能性LKB 1和AMPK的癌细胞中显示出有效的促凋亡作用。因此,我们的结果建立了ATM、LKB 1和AMPK对DNA损伤药物的响应的线性关系。
The present study aims to determine the effect of AMPK on etoposide-induced apoptosis of cancer cells. Our results revealed that etoposide induced AMPK activation in prostate C4-2 cancer cells, an event that was attenuated by ATM siRNA. In A549 cells that lack LKB1, AMPK was unable to be activated by etoposide, which was restored by introduction of LKB1. Likewise, silencing LKB1 in C4-2 cells impaired AMPK activation. Finally, etoposide displayed a potent pro-apoptotic effect in cancer cells with functional LKB1 and AMPK. Thus, our results establish a linear relationship of ATM, LKB1 and AMPK in response to the DNA damage drug.
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