Figure 10. Effect of Salvia haenkei extract 0.01-0.1-1-10 μg/ml on MMP-2 mRNA levels in HaCaT cells exposed and not exposed to UVB radiation (30 KJ/m2). Results are normalized to GAPDH, expressed as ratio of treatment vs control not exposed to UVB, and are the mean ± SEM of 3 independent experiments. *p < 0.05, treatment vs control-UVB; § p < 0.05, §§ p < 0.01, treatment vs control+UVB.