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Propolis recovered the loss of UVA-induced mitochondrial membrane potential in HaCaT cells. HaCaT cells were pre-treated with or without propolis (5 and 10 μg/mL) for 1 hr and then irradiated with UVA (4 J/cm2) for 6 hr. Mitochondrial membrane potential was evaluated using Rhodamine 123 staining. The change of MMP were imaged on fluorescence microscope (×200).
