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Chin J Dent Res. 2016 Jun;19(2):103-8. doi: 10.3290/j.cjdr.a36180.

Osteoprotegerin Promotes Cementoblastic Activity of Murine Cementoblast Cell Line in vitro.



To investigate the effect of osteoprotegerin (OPG) on the cementoblastic activity of a clonal population of immortalised murine cementoblasts (OCCM-30) in vitro.


OCCM-30 cells were transiently transfected with the mouse OPG using the Avalanche transfection reagent. The ectopic expression of OPG was confirmed by enzyme-linked immunosorbent assay and quantitative polymerase chain reaction. The cell counting Kit-8 assay was used to investigate the effect of OPG on cell proliferation. The expression levels of cementoblastic-related mRNA and protein in the transfected OCCM-30 cells were detected using real-time PCR, Western blotting and immunohistochemical staining.


Satisfactory transfection efficiency was observed 48 h after transfection. The results of the cell proliferation assay indicated that the expansion rate of the OPG transfection group was greater than that of the control group at both 72 h and 96 h. The mRNA levels of osterix (Osx), protein kinase B (Akt1), cementum attachment protein (CAP) and osteopontin (Opn) were significantly upregulated (P < 0.05) in the OPG group. Protein levels of OPN, bone sialoprotein II (BSP II), osteocalcin (OC) and CAP, which are responsible for osteogenetic and cementoblastic activity, were significantly increased in the OPG-overexpressing group.


Overexpression of OPG in OCCM-30 cells promotes cementoblastic activity.

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