Figure 2. Dose-dependent activation of alkaline phosphatase activity by oxysterols.
(A) C3HT101/2 cells or (B) M2-10B4 cells at confluence were treated with control vehicle or 0.125-10 μM of Oxy133. For direct comparison to Oxy133, C3H cells were also treated with Oxy34 and Oxy49 (A). After 4 days, alkaline phosphatase (ALP) activity was measured in whole cell extracts. Data from a representative of three separate experiments are reported as the mean of triplicate determinations ± SD and normalized to protein concentration. (p <0.0001 for cells treated with 0.25 μM or higher dose of all oxysterols vs. control vehicle treated cells).