Fig. 1

Effects of EGCG on cell proliferation of hPDLCs. (A) Cell proliferation was determined using CCK-8 assay after EGCG treatment for 24, 48 or 72 h (n = 5). Boxplots represent median and interquartile range (IQR). For the factor “concentration of EGCG” in each chart, groups at the same time-point labeled with different letters (lower case letters for 24 h, upper case letters for 48 h and numbers for 72 h) are significantly different from each other (p < 0.05) and those with the same letters exhibit no significant difference. For the factor of “culture time” in each chart, groups treated with the same concentration of EGCG that are connected with a horizontal bar are not significant; (B) Representative microscopic fluorescence images of AO/EB stained specimens after EGCG treatment for 72 h (n = 3). Green fluorescence indicates living cells, while red fluorescence indicates apoptotic cells. Bar, 100 μm