Figure 5.
Increased superficial zone protein (SZP) accumulation by inhibition of Wnt/β-catenin pathway. Primary cells were cultured for 4 days as monolayers in serum-free chemically defined medium with antagonist of LRP5/6 co-receptor; Sclerostin (SOST) or Dickkopf-1 (DKK-1). SZP accumulation in spent medium was quantified according to enzyme-linked immunosorbent assay. Both SOST (1 and 3 µg/ml) and DKK-1 (0.1, 0.3 and 1 µg/ml) significantly stimulated SZP accumulation. Values are the mean ± standard deviations, with n=6 (*p<0.01 and **p<0.05, compared with the value of the control cultures).