Abstract
Gliomas are one of the most common and most aggressive types of central nervous system tumor. Angiogenesis is an important basis for the growth of solid tumors, including gliomas, which is regulated by microRNAs (miRNAs). However, the mechanism remains unclear. Recently, it was demonstrated that miR‑24 was upregulated in gliomas, so the aim of the present study is to establish whether the dysregulation of miR‑24 in glioma cells promotes microvascular proliferation of endothelial cells (ECs), and to investigate the potential mechanism. miR‑24 was overexpressed or downregulated in U251 glioma cell line cells using miR‑24 mimics or inhibitors, respectively. Subsequently, the effects of conditional medium from miR‑24 mimic‑ or inhibitor‑transfected U251 cells on cell viability, migration and angiogenesis of human umbilical vein ECs (HUVECs) were examined. The expression levels of vascular endothelial growth factor (VEGF) mRNA, basic fibroblast growth factor (bFGF) mRNA, epidermal growth factor (EGF) mRNA, transforming growth factor (TGF)‑β mRNA, matrix metalloproteinase (MMP)‑2 mRNA and MMP‑9 mRNA, and the mRNA and protein levels of VEGF and TGF‑β in miR‑24 mimic‑ or inhibitor‑transfected U251 cells were obtained by reverse transcr...Continue Reading
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