Ginsenoside Rd is one of the most abundant ingredients of Panax ginseng. Ginsenoside Rd significantly inhibits TNF-α-induced NF-κB transcriptional activity with an IC50 of 12.05±0.82 in HepG2 cells. Ginsenoside Rd also inhibits expression of COX-2 and iNOS mRNA and iNOS promoter activity in a dose-dependent manner. To determine nontoxic concentrations, HepG2 cells are treated with various concentrations (0.1, 1, and 10 μM) of compounds (e.g., Ginsenoside Rd) and cell viability is measured using an MTS assay. No compounds are significantly cytotoxic at up to 10 μM, indicating that NF-κB inhibition is not due to cell toxicity. Ginsenoside Rd is one of the most abundant ingredients of Panax ginseng, protects the heart via multiple mechanisms including the inhibition of Ca influx. Ginsenoside Rd reduces ICa,L peak amplitude in a concentration-dependent manner (IC50=32.4±7.1 μM). Ginsenoside Rd exhibits an inhibition against the activity of CYP2D6 in human liver microsomes with an IC50 of 58.0±4.5 μM, a weak inhibition against the activity of CYP1A2, CYP3A4, and CYP2C9 in human liver microsomes with IC50s of 78.4±5.3, 81.7±2.6, and 85.1±9.1, respectively, and an even weaker inhibition against the activity of CYP2A6 in human liver microsomes with an IC50 value of more than 100 μM.
Medlife has not independently confirmed the accuracy of these methods. They are for reference only.