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QPI. Representative image at 0, 24, 48, and 72 h of BR6 cells (A) and NLF cells (B) treated with Nanospermidine (NS, 200 μM spermidine) as a single agent and in combination with Nanofenretinide (NF, 10 µM fenretinide). As a comparison, the images of the untreated cells and the cells treated with NF are shown.
