A) CVCs were pretreated with INT-747 (3 μM) for 24 hours in the presence of high phosphate. Parallel immunoblots were run from same cell lysates using antibodies against the phosphorylated JNK (p-JNK), total JNK, p38 MAPK (p-p38MAPK), phosphorylated ERK (p-ERK), total ERK, phosphorylated phosphorylated AKT (p-AKT) and GAPDH. Data are representative of two experiments with similar results. B) Alizarin staining and C) Ca content. CVC were treated with SP600125 at the indicated concentration for 14 days in the presence of high-phosphate. D) ALP, COL1A1, Msx2 and osterix expression in CVC treated with SP600125 at 20 μM for 14 days. **p<0.01 vs. vehicle.