Fig. 1From: Exosomal miR-1290 is a potential biomarker of high-grade serous ovarian carcinoma and can discriminate patients from those with malignancies of other histological typesThe collection of exosomes from EOC cell lines and the analyses of exosomal miRNAs. (a) Electron microscopy. Exosomes were immunogold-labeled with anti-CD63 antibody and transmission electron micrographs of isolated exosomes secreted from 2 HGSOC cell lines (HeyA8, upper panel;TYK-nu, middle panel) are shown. Immortalized ovarian surface epithelium (IOSE) cells (bottom panel) were used as a non-malignant control. Scale bar, 100 nm. (b) Venn diagrams showing the relative miRNAs expressed in HeyA8 and TYK-nu vs. IOSEs by exosomal miRNA microarray. Circles with solid lines represent counts of exosomal miRNAs with expression levels increased by > 3.0-fold. Circles with dotted lines represent counts of miRNAs with expression levels increased by > 4.0-fold. (c) Summary of exosomal miRNA microarray. Exosomal miRNAs that were upregulated by more than 4.0-fold in both HeyA8 and TYK-nu vs. IOSEs are listed. (d) qRT-PCR of miR-1290. The relative expression of miR-1290 in HGSOC-derived exosomes is shown. IOSE-derived exosomes were used as a control. Data are the mean ± standard deviation (SD) of 3 experiments. **, P < 0.01Back to article page