Multiple tumor suppressor microRNAs regulate telomerase and TCF7, an important transcriptional regulator of the Wnt pathway.
Multiple tumor suppressor microRNAs regulate telomerase and TCF7, an important transcriptional regulator of the Wnt pathway.
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DOI:
10.1371/journal.pone.0086990
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Bose HR Jr
中科院分区:
文献类型:
--
作者:
Hrdličková R;Nehyba J;Bargmann W;Bose HR Jr
The human TERT (hTERT) gene encodes the telomerase catalytic subunit which plays a role in telomerase regulation. Telomerase is activated in more than 90% of all human malignancies and understanding how telomerase is regulated is necessary for implementation of successful anti-cancer therapies. microRNAs (miRNAs) are important regulators of gene expression in eukaryotic cells but evidence of their role in telomerase regulation has not been documented. To determine whether hTERT activity is regulated by multiple miRNAs, eight miRNAs which have putative binding sites in the hTERT 3′UTR together with miR-138-5p were evaluated in luciferase assays with a reporter containing the hTERT 3′UTR. Six miRNAs (let-7g*, miR-133a, miR-138-5p, miR-342-5p, miR-491-5p, and miR-541-3p) specifically inhibited the expression of the reporter luciferase-driven constructs and let-7g*, miR-133a, miR-138-5p, and miR-491-5p also downregulated endogenous telomerase activity in cells. Moreover, all six miRNAs significantly inhibited cell proliferation. miRNAs (miR-133a, miR-138-5p, 342-5p, 491-5p, 541-3p) also have predicted binding sites within the 3′UTR of three genes involved in Wnt signaling (TCF7, MSI1, and PAX5). These miRNAs inhibited the expression of the luciferase reporter constructs containing 3′UTRs of these genes and downregulated protein expression of the TCF7 transcription factor, which mediates the canonical Wnt pathway. Together, these results suggest the existence of a miRNA regulatory network involving the hTERT and Wnt pathway.
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DOI:
10.4161/cc.9.8.11202
发表时间:
2010-04-15
期刊:
Cell cycle (Georgetown, Tex.)
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1093/bioinformatics/btr149
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期刊:
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影响因子:
--
作者:
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通讯作者:
Stümpflen V
影响因子:
20.3
作者:
Bueno, Mara J.;Gomez de Cedron, Marta;Malumbres, Marcos
通讯作者:
Malumbres, Marcos
影响因子:
6.4
作者:
Akasaka, Y;Saikawa, Y;Kitajima, M
通讯作者:
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DOI:
10.1073/pnas.1208396109
发表时间:
2012-10-30
影响因子:
11.1
作者:
Grossmann, Tom N.;Yeh, Johannes T. -H.;Verdine, Gregory L.
通讯作者:
Verdine, Gregory L.