[Advanced oxidation protein products inhibit proliferation and differentiation of rat osteoblasts through oxidative stress].

Objective: To investigate the effect of advanced oxidation protein products (AOPP) on proliferation, differentiation, and oxidative stress in rat osteoblasts.

Methods: The cell proliferation and differentiation of osteoblasts isolated from neonatal SD rat skull were evaluated following treatment with different concentrations (50, 100, 200, and 400 µg/ml) of AOPP using CCK-8 kit and ALP assay kit, respectively. The levels of reactive oxygen species (ROS) in the treated cells were analyzed using 2', 7'-dichlorofluorescin diacetate, and the transcription levels of ALP, collagen I and RAGE were assessed using real-time PCR.

Results: Compared with the control group, AOPP-treated osteoblasts showed obviously inhibited proliferation and differentiation with down-regulated expressions of ALP and collagen I and increased ROS production and RAGE expression.

Conclusion: AOPP can inhibit the proliferation and differentiation of rat osteoblasts partially by up-regulating RAGE and inducing ROS production.