Oncomir miR-125b suppresses p14(ARF) to modulate p53-dependent and p53-independent apoptosis in prostate cancer.
Oncomir miR-125b suppresses p14(ARF) to modulate p53-dependent and p53-independent apoptosis in prostate cancer.
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DOI:
10.1371/journal.pone.0061064
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Devere White RW
中科院分区:
文献类型:
--
作者:
Amir S;Ma AH;Shi XB;Xue L;Kung HJ;Devere White RW
MicroRNAs are a class of naturally occurring small non-coding RNAs that target protein-coding mRNAs at the post-transcriptional level and regulate complex patterns of gene expression. Our previous studies demonstrated that in human prostate cancer the miRNA miR-125b is highly expressed, leading to a negative regulation of some tumor suppressor genes. In this study, we further extend our studies by showing that miR-125b represses the protein product of the ink4a/ARF locus, p14ARF, in two prostate cancer cell lines, LNCaP (wild type-p53) and 22Rv1 (both wild type and mutant p53), as well as in the PC-346C prostate cancer xenograft model that lentivirally overexpressed miR-125b. Our results highlight that miR-125b modulates the p53 network by hindering the down-regulation of Mdm2, thereby affecting p53 and its target genes p21 and Puma to a degree sufficient to inhibit apoptosis. Conversely, treatment of prostate cancer cells with an inhibitor of miR-125b (anti-miR-125b) resulted in increased expression of p14ARF, decreased level of Mdm2, and induction of apoptosis. In addition, overexpression of miR-125b in p53-deficient PC3 cells induced down-regulation of p14ARF, which leads to increased cell proliferation through a p53-independent manner. Thus, we conclude that miR-125b acts as an oncogene which regulates p14ARF/Mdm2 signaling, stimulating proliferation of prostate cancer cells through a p53-dependent or p53-independent function. This reinforces our belief that miR-125b has potential as a therapeutic target for the management of patients with metastatic prostate cancer.
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影响因子:
2.8
作者:
Prueitt, Robyn L.;Yi, Ming;Hudson, Robert S.;Wallace, Tiffany A.;Howe, Tiffany M.;Yfantis, Harris G.;Lee, Dong. H.;Stephens, Robert M.;Liu, Chang-Gong;Calin, George A.;Croce, Carlo M.;Ambs, Stefan
通讯作者:
Ambs, Stefan
DOI:
10.1146/annurev.pathol.4.110807.092222
发表时间:
2009
期刊:
Annual review of pathology
影响因子:
--
作者:
Lee YS;Dutta A
通讯作者:
Dutta A
影响因子:
28.5
作者:
Hassan O;Ahmad A;Sethi S;Sarkar FH
通讯作者:
Sarkar FH
DOI:
10.1073/pnas.1016611107
发表时间:
2010-12-14
影响因子:
11.1
作者:
Bousquet, Marina;Harris, Marian H.;Lodish, Harvey F.
通讯作者:
Lodish, Harvey F.
DOI:
10.1073/pnas.0804549105
发表时间:
2008-07-29
影响因子:
11.1
作者:
Mitchell, Patrick S.;Parkin, Rachael K.;Tewari, Muneesh
通讯作者:
Tewari, Muneesh