Figure 5From: Effect of connective tissue growth factor (CCN2/CTGF) on proliferation and differentiation of mouse periodontal ligament-derived cellsEffects of rCCN2/CTGF on ALPase activity from MPL cells. When MPL cells reached confluence, the culture medium was replaced with α-MEM containing 1% FBS, and the cells were then cultured with various concentrations of rCCN2/CTGF. After 48 hrs, the cell layers were collected, and ALPase activity was determined as described in "Materials and Methods." Values represent the averages ± SD of 3 separate experiments. Asterisks denote statistically significant differences from the vehicle-treated control at the significance level of *p < 0.01.Back to article page