| ARE/EpRE | antioxidant/electrophile response elements |
| PBL | peripheral blood lymphocytes |
| Keap1 | Kelch-like ECH-associated protein 1 |
| KEAP1 | gene name of Keap1 |
| Nrf2 | nuclear factor erythroid 2 (NFE2)-related factor 2 |
| NFE2L2 | gene name of Nrf2 |
| NQO-1 | NAD(P)H quinone oxidoreductase 1 |
| HO-1 | heme oxygenase 1 |
| qRT-PCR | quantitative real-time polymerase chain reaction |
| RQ | relative quantity |