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Article Abstract
PCBP2, a member of the poly(C)-binding protein (PCBP) family, is involved in posttranscriptional and translational regulation by interacting with single-stranded poly(C) motifs in target mRNAs. Recent studies have shown that PCBP2 is overexpressed and plays an important role in human cancers, including glioma. However, the molecular basis for its up-regulation remains poorly understood. Here, we show that microRNA-214 (miR-214) interacts with the 3'-untranslated region of PCBP2 mRNA and induces its degradation, leading to reductions in its protein expression. As a result, overexpression of miR-214 mimics significantly inhibited, while its antisense oligos proliferation and growth of glioma cells. Restoration of PCBP2 remarkably reversed the tumor-suppressive effects of miR-214 on cell proliferation and growth. In summary, our data indicate that miR-214 may function as tumor suppressor in glioma by targeting PCBP2.
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