Rat aortic ring assay [33] and yolk sac membrane (YSM) assay [34] were performed as described previously to evaluate the angiogenic potential of miR-140-5p using CM from EV, miR-140-5p-KD, or miR-140-5p-OE cells. The experiments were repeated three times. Images of the YSM assay were taken using a stereomicroscope (Nikon, Tokyo, Japan).
The secretion of pro-angiogenic factors was evaluated by ELISA Kit (R&D Systems, Minneapolis, MN, USA) as per the manufacturer’s instructions.
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