Figure 2.

Effects of H. cordata extracts and main active compounds on human dermal fibroblast cell viability. Cells were exposed with or without UVB at the intensity of 15 mJ/cm² then treated with HcEE (A), HcEA (B), hyperoside (C), quercitrin (D) and chlorogenic acid (E) for 48 h. Cell survival was determined using SRB assay. Data are presented as mean ± S.D. values of three independent experiments. HcEE: H. cordata ethanolic extract, HcEA: H. cordata ethyl acetate fraction, UVB: cells exposed with 15 mJ/cm² of UVB, Non-UVB: control group of cells non-exposed to UVB.