Histone H4 expression is cooperatively maintained by IKKβ and Akt1 which attenuates cisplatin-induced apoptosis through the DNA-PK/RIP1/IAPs signaling cascade.
机构：[1]Laboratory of Molecular and Translational Medicine, Key Laboratory of Birth Defects and Related Diseases ofWomen and Children (Sichuan University) of Ministry of Education, Department of Obstetrics and Gynecology,West China Second University Hospital, Sichuan University, Chengdu 610041, China[2]Department of AbdominalOncology, Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China四川大学华西医院[3]Department ofImmunology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China[4]Molecular Biology and Lung Cancer Program, Lovelace Respiratory Research Institute, 2425 Ridgecrest Dr.E.,lbuquerque NM 87108, USA
While chromatin remodeling mediated by post-translational modification of histone is extensively studied in carcinogenesis and cancer cell's response to chemotherapy and radiotherapy, little is known about the role of histone expression in chemoresistance. Here we report a novel chemoresistance mechanism involving histone H4 expression. Extended from our previous studies showing that concurrent blockage of the NF-κB and Akt signaling pathways sensitizes lung cancer cells to cisplatin-induced apoptosis, we for the first time found that knockdown of Akt1 and the NF-κB-activating kinase IKKβ cooperatively downregulated histone H4 expression, which increased cisplatin-induced apoptosis in lung cancer cells. The enhanced cisplatin cytotoxicity in histone H4 knockdown cells was associated with proteasomal degradation of RIP1, accumulation of cellular ROS and degradation of IAPs (cIAP1 and XIAP). The cisplatin-induced DNA-PK activation was suppressed in histone H4 knockdown cells, and inhibiting DNA-PK reduced expression of RIP1 and IAPs in cisplatin-treated cells. These results establish a novel mechanism by which NF-κB and Akt contribute to chemoresistance involving a signaling pathway consisting of histone H4, DNA-PK, RIP1 and IAPs that attenuates ROS-mediated apoptosis, and targeting this pathway may improve the anticancer efficacy of platinum-based chemotherapy.
基金：
National Natural Science Foundation of China (81172111 and 81372377).
语种：
外文
PubmedID：
中科院(CAS)分区：
出版当年[2017]版：
大类|3 区综合性期刊
小类|3 区综合性期刊
最新[2023]版：
大类|2 区综合性期刊
小类|2 区综合性期刊
第一作者：
第一作者机构：[1]Laboratory of Molecular and Translational Medicine, Key Laboratory of Birth Defects and Related Diseases ofWomen and Children (Sichuan University) of Ministry of Education, Department of Obstetrics and Gynecology,West China Second University Hospital, Sichuan University, Chengdu 610041, China
通讯作者：
通讯机构：[1]Laboratory of Molecular and Translational Medicine, Key Laboratory of Birth Defects and Related Diseases ofWomen and Children (Sichuan University) of Ministry of Education, Department of Obstetrics and Gynecology,West China Second University Hospital, Sichuan University, Chengdu 610041, China[3]Department ofImmunology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China[4]Molecular Biology and Lung Cancer Program, Lovelace Respiratory Research Institute, 2425 Ridgecrest Dr.E.,lbuquerque NM 87108, USA
推荐引用方式(GB/T 7714)：
Ruixue Wang,Xuelian Zheng,Lei Zhang,et al.Histone H4 expression is cooperatively maintained by IKKβ and Akt1 which attenuates cisplatin-induced apoptosis through the DNA-PK/RIP1/IAPs signaling cascade.[J].Scientific reports.2017,7:41715.doi:10.1038/srep41715.
APA：
Ruixue Wang,Xuelian Zheng,Lei Zhang,Bin Zhou,Huaizhong Hu...&Xia Wang.(2017).Histone H4 expression is cooperatively maintained by IKKβ and Akt1 which attenuates cisplatin-induced apoptosis through the DNA-PK/RIP1/IAPs signaling cascade..Scientific reports,7,
MLA：
Ruixue Wang,et al."Histone H4 expression is cooperatively maintained by IKKβ and Akt1 which attenuates cisplatin-induced apoptosis through the DNA-PK/RIP1/IAPs signaling cascade.".Scientific reports 7.(2017):41715
