Aurora kinase A (AURKA) has been implicated in the regulation of cell cycle progression, mitosis and a key number of oncogenic signaling pathways in various malignancies. However, little is known about its role in gastric cancer prognosis and genotoxic resistance. Here we found that AURKA was highly overexpressed in gastric cancer and inversely correlated with disease prognosis. Overexpression of AURKA exacerbated gastric cancer drug resistance through upregulating the expression of the anti-apoptotic protein Survivin. Conversely, we demonstrated that AURKA depletion caused a decrease in Survivin protein levels by increasing its ubiquitylation and degradation. Mass spectrometric analysis revealed that upon AURKA depletion, Survivin bound to the FBXL7 E3 ubiquitin ligase, which induced ubiquitin-proteasome degradation of Survivin. In addition, we showed that AURKA regulated FBXL7 both at the levels of transcription and translation. Moreover, proteomic analysis of nuclear AURKA-interacting proteins identified Forkhead box protein P1 (FOXP1). We next showed that AURKA was required for FBXL7 transcription and that AURKA negatively regulated FOXP1-mediated FBXL7 expression. The physiological relevance of the regulation of Survivin by AURKA through the FOXP1-FBXL7 axis was further underscored by the significant positive correlations between AURKA and Survivin expression in gastric cancer patient samples. Moreover, the AURKA depletion or kinase inhibition-induced apoptotic cell death could be reversed by Survivin ectopic overexpression, further supporting that AURKA regulated Survivin to enhance drug resistance. In agreement, inhibition of AURKA synergistically enhanced the cytotoxic effect of DNA-damaging agents in cancer cells by suppressing Survivin expression. Taken together, our data suggest that AURKA restricts Survivin ubiquitylation and degradation in gastric cancer to promote drug resistance and hence the AURKA-Survivin axis can be targeted to promote the efficacy of DNA-damaging agents in gastric cancer.
基金:
National Basic Research Program of China (973 Program)National Basic Research Program of China [2012CB967000]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [81130040, 81573025, 81402445]; National High Technology Research and Development Program of China (863 Program)National High Technology Research and Development Program of China [2015AA020926]; Special Support Program for Training High Level Talents in Guangdong Province [2014TQ01R138]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [15ykjc20c]; Breast Cancer Campaign [2012 May PR070, 2012NovemberPhD016]; Cancer Research UK (CRUK)Cancer Research UK [A12011]; Biotechnology and Biological Sciences Research CouncilBiotechnology and Biological Sciences Research Council (BBSRC) [BBS/B/03785]; Engineering and Physical Sciences Research CouncilEngineering & Physical Sciences Research Council (EPSRC) [1234732]
语种:
外文
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出版当年[2017]版:
大类|2 区医学
小类|3 区肿瘤学
最新[2023]版:
大类|2 区医学
小类|2 区肿瘤学
第一作者:
第一作者机构:[1]Dalian Med Univ, Ctr Canc, Inst Canc Stem Cell, Dalian, Peoples R China;[2]Sun Yat Sen Univ, Ctr Canc, State Key Lab Oncol South China, Guangzhou 116044, Guangdong, Peoples R China;
通讯作者:
通讯机构:[1]Dalian Med Univ, Ctr Canc, Inst Canc Stem Cell, Dalian, Peoples R China;[2]Sun Yat Sen Univ, Ctr Canc, State Key Lab Oncol South China, Guangzhou 116044, Guangdong, Peoples R China;[3]Sun Yat Sen Univ, Affiliated Hosp 3, Dept Hematol, Guangzhou, Guangdong, Peoples R China;[4]Sun Yat Sen Univ, Affiliated Hosp 3, Inst Hematol, Guangzhou, Guangdong, Peoples R China;
推荐引用方式(GB/T 7714):
Kamran M.,Long Z-J,Xu D.,et al.Aurora kinase A regulates Survivin stability through targeting FBXL7 in gastric cancer drug resistance and prognosis[J].ONCOGENESIS.2017,6(2):-.doi:10.1038/oncsis.2016.80.
APA:
Kamran, M.,Long, Z-J,Xu, D.,Lv, S-S,Liu, B....&Liu, Q..(2017).Aurora kinase A regulates Survivin stability through targeting FBXL7 in gastric cancer drug resistance and prognosis.ONCOGENESIS,6,(2)
MLA:
Kamran, M.,et al."Aurora kinase A regulates Survivin stability through targeting FBXL7 in gastric cancer drug resistance and prognosis".ONCOGENESIS 6..2(2017):-