Research Article

All-Trans Retinoic Acid Enhances Matrix Metalloproteinase 2 Expression and Secretion in Human Myeloid Leukemia THP-1 Cells

Figure 3

Effect of RAR/RXR agonists or antagonists on MMP2 secretion. Cells were treated with the different concentrations of RAR/RXR agonists indicated above (a, b, and c). Cells were treated with 1 μM RAR/RXR antagonist in the presence of 100 nM ATRA or with 1 μM RAR/RXR agonist without ATRA for 48 h (a and d). The culture supernatants were collected, concentrated by filtration, and subjected to western blot analysis. Protein from each group was loaded at least three times on the gels. Densitometry analysis of MMP-2 bands shown in (a) was performed by ChemiDoc MP System (b, c, and d). P < 0.01.
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