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Background  The effect of ginsenosides on the growth and apoptosis of human lens epithelial (HLE) B3 cells exposed to H 2 O 2  was investigated. In addition, the effect of ginsenosides on gene expression in HLE-B3 cells was analyzed using microarray assays to determine its molecular mechanism.    Methods  HLE-B3 cells were treated with 1.75 M H 2 O 2  in the presence or absence of 5, 10 or 20 μM ginsenosides. Cell viability and apoptosis were examined by MTT assays and flow cytometry, respectively, at 24 to 120 h after the treatment. Furthermore, HLE-B3 cells were treated with 20 μM ginsenosides for 8 days and total RNA was isolated and analyzed using the Affymetrix GeneChip Array. Principal component analysis was performed to visualize the microarray data.    Results  Addition of ginsenosides significantly alleviated the growth inhibitory effect of H 2 O 2  on HLE-B3 cells and the percentage of viable cells was increased by more than 3 folds. Flow cytometric analysis showed that 6.16 ± 0.29% of H 2 O 2 -treated HLE-B3 cells were early apoptotic cells, and the percentage was reduced to 4.78 ± 0.16% ( P  < 0.05) in the presence of 20 μM ginsenosides. Principal component analysis revealed that ginsenoside caused extensive changes in gene expression in HLE-B3 cells. A total of 6219 genes showed significant differential expression in HLE-B3 cells treated with ginsenoside; among them, 2552 (41.0%) genes were significantly upregulated, whereas 3667 (59.0%) genes were significantly downregulated.  FOXN2 ,  APP  and  RAD23B  were the top three upregulated genes while  WSB1 ,  PSME4  and  DCAF7  were the top three downregulated genes in HLE-B3 cells treated with ginsenosides.    Conclusion  Ginsenosides induce extensive changes in the expression of genes involved in multiple signaling pathways, including apoptotic signaling pathway and DNA damage response signaling pathway. Ginsenosides alleviate H 2 O 2 -induced suppression of the growth of HLB cells and inhibit H 2 O 2 -induced apoptosis of HLB cells.

Ginsenosides induce extensive changes in gene expression and inhibit oxidative stress-induced apoptosis in human lens epithelial cells