Abstract
miR-221/222 are two highly homologous microRNAs that are frequently upregulated in solid tumors. However, the effects of miR-221/222 in malignant gliomas have not been investigated thoroughly. In this study, we found that miR-221/222 were significantly upregulated in human glioma samples and glioma cell lines. Both gain- and loss-of-function studies showed that miR-221/222 regulate cell proliferation, the cell cycle and apoptosis, in addition to, invasion, metastasis, and angiogenesis in glioma cell lines. Subsequent investigations revealed that TIMP2 is a direct target of miR-221/222, and overexpression of TIMP2 reduced the miR-221/222-mediated invasion, metastasis, and angiogenesis of glioma cells. Taken together, our results suggest that the suppression of miR-221/222 may be a feasible approach for inhibiting the malignant behaviors of glioma.
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Abbreviations
- VEGF:
-
Vascular endothelial growth factor
- TIMPs:
-
Tissue inhibitors of metalloproteinases
- MMPs:
-
Metallopeptidases
- ECM:
-
Extracellular matrix
- HUVECs:
-
Human umbilical vein endothelial cells
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This work was supported by the National Natural Sciences Foundation of China (81172289 and 81472633).
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Fan Yang and Wei Wang contributed equally to this work.
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Yang, F., Wang, W., Zhou, C. et al. MiR-221/222 promote human glioma cell invasion and angiogenesis by targeting TIMP2. Tumor Biol. 36, 3763–3773 (2015). https://doi.org/10.1007/s13277-014-3017-3
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DOI: https://doi.org/10.1007/s13277-014-3017-3