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DNPs inhibit UVB-induced apoptosis-related proteins expression in HaCaT cells. (A) Representative fluorescence images showing cleaved caspase-9 staining and (B) cleaved caspase-3 staining. Scale bar = 100 μm (A)/20 μm (B); Cleaved caspase-9 and cleaved caspase-3 positive cells were counted (C,D). ### p < 0.001 vs. control; * p < 0.05, ** p < 0.01, and *** p < 0.001 vs. UVB.
