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Effect of curcumin treatment on apoptosis in BaP -induced lung tissue: (a) control group: did not show apoptotic nuclei; (b) TUNEL-positive cells were detected in the BZ group treated cells; (c) benzopyrene plus curcumin treated group: curcumin significantly decreased the number of TUNEL-positive cells compared with the number in the BaP group. Scale bar = 50 μm.
