ObjectiveThe expression of osteoprotegerin (OPG) and receptor activator of nuclear factor-κB ligand (RANKL) in human periodontal ligament cells (HPDLCs) was investigated by cell culture under continuous static pressure.MethodsHPDLCs were primarily cultured by tissue explant method and divided into three groups: group A (13-18 years old), group B (19-29 years old), and group C (30-44 years old). CCK-8 was used to detect the proliferation of HPDLCs. The senescence of HPDLCs was detected by senescence-associated β-galactosidase staining. Cells in the three groups were respectively given 0, 1.5, 3, 6, 12, 24, 48, and 72 h of continuous static pressurein vitro. The expression of OPG and RANKL in the supernatant was detected by enzyme-linked immunosorbent assay.ResultsAfter continuous static pressurein vitrofor stimulation, the expression of OPG and RANKL changed. The expression of OPG increased with time and age (P<0 .01). the expression of rankl increased with time and decreased with age (P<0 .01). the ratio of opg/rankl initially decreased, increased with time, and then continued to rise with age (P<0 .01).ConclusionAging could increase the expression of OPG and the ratio of OPG/RANKL and decrease the expression of RANKL in HPDLCs under continuous static pressurein vitro.
