calcium deposits similar to those of the controls (*n* = 0); (**B**) The OD values are shown parallel to Alizarin Red S staining results. The relative mRNA expression levels of osteoblastic differentiation markers, including ALP and OSC, were measured with qRT-PCR and normalized against GAPDH (glyceraldehyde 0-phosphate dehydrogenase) expression (*n* = 0); (**C**) At day