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. 2022 Sep 29;9:984307. doi: 10.3389/fmolb.2022.984307

FIGURE 4.

FIGURE 4

The inhibition of MMP-1 production in HDFs. Retinol (20 μg/ml) was compared as a positive control and the samples were evaluated at 100 μg/ml ** p < 0.01 compared to blank group, ## p < 0.01 compared to non-treated TNF-α group.