Vitamin K2 Induces Mitochondria-Related Apoptosis in Human Bladder Cancer Cells via ROS and JNK/p38 MAPK Signal Pathways.

Vitamin K2 Induces Mitochondria-Related Apoptosis in Human Bladder Cancer Cells via ROS and JNK/p38 MAPK Signal Pathways.
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维生素 K2 通过 ROS 和 JNK/p38 MAPK 信号通路诱导人膀胱癌细胞线粒体相关细胞凋亡。

DOI:
10.1371/journal.pone.0161886
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发表时间:
2016
期刊:
影响因子:
3.7
通讯作者:
Hong L
Hong L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Duan F;Yu Y;Guan R;Xu Z;Liang H;Hong L

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维生素K2对多种癌细胞凋亡的影响在以前的研究中已经得到了很好的证实。然而,维生素K2对膀胱癌细胞的凋亡作用尚未得到评估。本研究的目的是检测维生素K2在膀胱癌细胞中的凋亡活性,并探讨其潜在的机制。维生素K2通过线粒体途径诱导膀胱癌细胞凋亡,包括线粒体膜电位降低、细胞色素C释放和caspase-3级联反应。此外,维生素K2处理后,c-Jun N-末端激酶(JNK)和p38 MAPK磷酸化,JNK抑制剂SP 600125和p38 MAPK抑制剂SB 203580均能完全抑制维生素K2诱导的细胞凋亡和线粒体膜电位的降低。此外,在膀胱癌细胞中检测到活性氧(ROS)的产生,在维生素K2和抗氧化剂N-乙酰半胱氨酸(NAC)处理后,几乎阻断了维生素K2引发的细胞凋亡、线粒体膜电位的丧失以及JNK和p38 MAPK的激活。综上所述,这些发现表明维生素K2通过ROS介导的JNK/p38 MAPK和线粒体途径诱导膀胱癌细胞凋亡。
The effects of vitamin K2 on apoptosis in a variety of cancer cells have been well established in previous studies. However, the apoptotic effect of vitamin K2 on bladder cancer cells has not been evaluated. The aim of this study is to examine the apoptotic activity of Vitamin K2 in bladder cancer cells and investigate the underlying mechanism. In this study, Vitamin K2 induced apoptosis in bladder cancer cells through mitochondria pathway including loss of mitochondria membrane potential, cytochrome C release and caspase-3 cascade. Furthermore, the phosphorylation of c-Jun N-terminal kinase (JNK) and p38 MAPK was detected in Vitamin K2-treated cells and both SP600125 (an inhibitor of JNK) and SB203580 (an inhibitor of p38 MAPK) completely abolished the Vitamin K2-induced apoptosis and loss of mitochondria membrane potential. Moreover, the generation of reactive oxygen species (ROS) was detected in bladder cancer cells, upon treatment of vitamin K2 and the anti-oxidant N-acetyl cysteine (NAC) almost blocked the Vitamin K2-triggered apoptosis, loss of mitochondria membrane potential and activation of JNK and p38 MAPK. Taken together, these findings revealed that Vitamin K2 induces apoptosis in bladder cancer cells via ROS-mediated JNK/p38 MAPK and Mitochondrial pathways.
ROS诱导的JNK和p38信号传导是果蝇再生过程中未配对的细胞因子激活所必需的。
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