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Gelatin-gel zymographic analysis of matrix metalloproteinases (MMPs) at 0, 2, and 6 wk after AVF and 8 and 10 wk after AVF treated with NaHS (H2S donor). Corresponding actin bands are shown. Bar graphs represent the total MMP activity scan AU normalized with actin. Each bar is an average ± SD from n = 6 in each group. *P < 0.001 compared with 0 wk. **P < 0.001 compared with 6 wk.
