JNK confers 5-fluorouracil resistance in p53-deficient and mutant p53-expressing colon cancer cells by inducing survival autophagy.
JNK confers 5-fluorouracil resistance in p53-deficient and mutant p53-expressing colon cancer cells by inducing survival autophagy.
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JNK 通过诱导存活自噬赋予 p53 缺陷和突变 p53 表达结肠癌细胞 5-氟尿嘧啶耐药性
DOI:
10.1038/srep04694
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发表时间:
2014-04-15
影响因子:
4.6
通讯作者:
Han W
中科院分区:
文献类型:
--
作者:
Sui X;Kong N;Wang X;Fang Y;Hu X;Xu Y;Chen W;Wang K;Li D;Jin W;Lou F;Zheng Y;Hu H;Gong L;Zhou X;Pan H;Han W
Deficiency or mutation in the p53 tumor suppressor gene commonly occurs in human cancer and can contribute to disease progression and chemotherapy resistance. Currently, although the pro-survival or pro-death effect of autophagy remains a controversial issue, increasing data seem to support the idea that autophagy facilitates cancer cell resistance to chemotherapy treatment. Here we report that 5-FU treatment causes aberrant autophagosome accumulation in HCT116 p53−/− and HT-29 cancer cells. Specific inhibition of autophagy by 3-MA, CQ or small interfering RNA treatment targeting Atg5 or Beclin 1 can potentiate the re-sensitization of these resistant cancer cells to 5-FU. In further analysis, we show that JNK activation and phosphorylation of Bcl-2 are key determinants in 5-FU-induced autophagy. Inhibition of JNK by the compound SP600125 or JNK siRNA suppressed autophagy and phosphorylation of c-Jun and Bcl-2 but increased 5-FU-induced apoptosis in both HCT116 p53−/− and HT29 cells. Taken together, our results suggest that JNK activation confers 5-FU resistance in HCT116 p53−/− and HT29 cells by promoting autophagy as a pro-survival effect, likely via inducing Bcl-2 phosphorylation. These results provide a promising strategy to improve the efficacy of 5-FU-based chemotherapy for colorectal cancer patients harboring a p53 gene mutation.
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影响因子:
8.4
作者:
Li, Jie;Hou, Ni;Kuwano, Hiroyuki
通讯作者:
Kuwano, Hiroyuki
影响因子:
13.5
作者:
Fuest, Matthias;Willim, Karolina;Hasselblatt, Peter
通讯作者:
Hasselblatt, Peter
影响因子:
4.7
作者:
Kelkel, Mareike;Cerella, Claudia;Diederich, Marc
通讯作者:
Diederich, Marc
影响因子:
13.3
作者:
Paillas, Salome;Causse, Annick;Gongora, Celine
通讯作者:
Gongora, Celine
影响因子:
8
作者:
de la Cruz-Morcillo, M. A.;Valero, M. L. L.;Sanchez-Prieto, R.
通讯作者:
Sanchez-Prieto, R.