Project description:MiRNAs have been shown to alter both protein expression and secretion in different cellular contexts. By combining in vitro, in vivo and in silico techniques, we demonstrated that overexpression of pre-miR-1307 reduced the ability of breast cancer cells to induce endothelial cell sprouting and angiogenesis. However, the molecular mechanism behind this and the effect of the individual mature miRNAs derived from pre-miR-1307 on protein secretion and is largely unknown. Here, we overexpressed miR-1307-3p|0, -3p|1 and 5p|0 in MDA-MB-231 breast cancer cells and assessed the impact of miRNA overexpression on protein secretion by Mass Spectrometry. Unsupervised hierarchical clustering revealed a distinct phenotype induced by overexpression of miR-1307-5p|0 compared to the controls and to the 5’isomiRs derived from the 3p-arm. Together, our results suggest different impacts of miR-1307-3p and miR-1307-5p on protein secretion which is in line with our in vitro observation that miR-1307-5p, but not the isomiRs derived from the 3p-arm reduce endothelial cell sprouting in vitro. Hence these data support the hypothesis that miR-1307-5p is at least partly responsible for impaired vasculature in tumors overexpressing pre-miR-1307.
Project description:To identify targets of miR-550a-3-5p in human colon cancer, HCT116 cell line expressing miR-550a-3-5p was subjected to Illumina microarrays.
Project description:miR-483-5p and miR-551a were over-expressed in a colon cancer cell-line LvM3b to identify genes that are down-regulated by the miRNAs over-expression. Total RNA was isolated from miR-483-5p or miR-551a over-expressing LvM3b cells as well as control LvM3b cells.
Project description:miR-483-5p and miR-551a were over-expressed in a colon cancer cell-line LvM3b to identify genes that are down-regulated by the miRNAs over-expression. Total RNA was isolated from miR-483-5p or miR-551a over-expressing LvM3b cells as well as control LvM3b cells.
Project description:miR-483-5p and miR-551a were over-expressed in a colon cancer cell-line LvM3b to identify genes that are down-regulated by the miRNAs over-expression.
