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SO2 inhibits osteoblastic differentiation of vascular smooth muscle cells in vitro. Western blot analysis of SM α-actin (A) and Runx2 (B) in A7r5 VSMCs. * p < 0.05 vs. control; ** p < 0.01 vs. control; # p < 0.05 vs. calcification; ## p < 0.01 vs. calcification. Data are from three independent experiments (n = 3) performed in triplicate.
