Fig. 2

Foam cell formation after 24 h of salidroside pre-treatment. (a) and (b) Oil red staining areas were showed no differences between salidroside-tearted cell groups. However, ox-LDL significantly increased foam cell formation at 10 and 100 μg/mL; (c) THP1 cells were incubated with salidroside (0.1, 1, 10 μM) followed by treatment with 150 μg/mL ox-LDL; (d) Quantitative analysis of foam cell formation. Data are expressed as mean ± standard deviation (SD). Red: Oil red O-positive cells; Scale bars indicate 500 μm; # p < 0.05 indicates significant difference from the control group. * p < 0.01 indicates significant difference from the control group