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Effect of osteogenic induction through by HO-1 expression. The HPDL cells (5 × 103 cells/mL) were pretreated with or without the indicated concentration of tin protoporphyrin IX (SnPP), then after, each ginsenoside-Re, Ra8, and -Rf was treated for 6 h at the indicated concentration, and then incubated with PG-LPS for 14 days. The result of mineralization was measured by Alizarin Red S (ARS) (A) staining and mineralization node (B).
