Alteration in Mir-21/PTEN expression modulates gefitinib resistance in non-small cell lung cancer.
Alteration in Mir-21/PTEN expression modulates gefitinib resistance in non-small cell lung cancer.
复制标题
Mir-21/PTEN 表达的改变可调节非小细胞肺癌的吉非替尼耐药性。
DOI:
10.1371/journal.pone.0103305
复制
发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Shu Y
中科院分区:
文献类型:
--
作者:
Shen H;Zhu F;Liu J;Xu T;Pei D;Wang R;Qian Y;Li Q;Wang L;Shi Z;Zheng J;Chen Q;Jiang B;Shu Y
Resistance to TKI treatment is a major obstacle in effective treatment of NSCLC. Besides EGFR mutation status, the mechanisms involved are largely unknown. Some evidence supports a role for microRNA 21 in modulating drug sensitivity of chemotherapy but its role in NSCLC TKI resistance still remains unexplored. This study aimed to investigate whether NSCLC miR-21 mediated resistance to TKIs also results from Pten targeting. Here, we show miR-21 promotes cancer by negatively regulating Pten expression in human NSCLC tissues: high miR-21 expression levels were associated with shorter DFS in 47 NSCLC patients; high miR-21/low Pten expression levels indicated a poor TKI clinical response and shorter overall survival in another 46 NSCLC patients undergoing TKI treatment. In vitro assays showed that miR-21 was up-regulated concomitantly to down-regulation of Pten in pc-9/GR cells in comparison with pc-9 cells. Moreover, over-expression of miR-21 significantly decreased gefitinib sensitivity by down-regulating Pten expression and activating Akt and ERK pathways in pc-9 cells, while miR-21 knockdown dramatically restored gefitinib sensitivity of pc-9/GR cells by up-regulation of Pten expression and inactivation of AKT and ERK pathways, in vivo and in vitro. We propose alteration of miR-21/Pten expression as a novel mechanism for TKI resistance in NSCLC cancer. Our findings provide a new basis for using miR 21/Pten-based therapeutic strategies to reverse gefitinib resistance in NSCLC.
登录
查看更多内容
影响因子:
2.1
作者:
Bai, Haitao;Wei, Ju;Xu, Rang
通讯作者:
Xu, Rang
影响因子:
5.3
作者:
Li, Bing;Ren, Shengxiang;Schmit-Bindert, Gerald
通讯作者:
Schmit-Bindert, Gerald
DOI:
10.1155/2013/243859
发表时间:
2013
期刊:
Evidence-based complementary and alternative medicine : eCAM
影响因子:
--
作者:
Kang XH;Xu ZY;Gong YB;Wang LF;Wang ZQ;Xu L;Cao F;Liao MJ
通讯作者:
Liao MJ
影响因子:
6.4
作者:
Janmaat, ML;Rodriguez, JA;Giaccone, G
通讯作者:
Giaccone, G
影响因子:
3.4
作者:
Huang, Yong;Yang, You Bing;Cheng, Xiang Chao
通讯作者:
Cheng, Xiang Chao