Figure 1.

Messenger RNA expression of mineralization-related genes. The mRNA expression of mineralization-related biomarkers including core-binding factor subunit alpha-1, collagen 1 α1, alkaline phosphatase, interleukin 6, osteocalcin, bone sialoprotein, cementum protein 1, transforming growth factor-β1, vitamin D receptor, osteopontin, cementum attachment protein, and osteoprotegerin was surveyed after treatment of cultured human periodontium cells with vitamin C and calcitriol for 2 weeks. Abbreviations: GAPDH, glyceraldehyde 3-phosphate dehydrogenase. *P<0.05, **P<0.01.