Figure 3: RUNX2, OSX, and OPN mRNA expression in BMSCs treated with quercetin. (a)–(c) The cells were incubated in osteogenic-inducing medium (OIM) with different concentrations of quercetin for 7 days. mRNA expression was then analyzed by real-time PCR. Target gene mRNA expression levels were normalized to GAPDH mRNA levels. Each value represents the mean ± SD from triplicate experiments. indicates a significant difference between the two groups at .