Ginger constituents ameliorated B(α)P-induced toxicity via modulation of antioxidants and xenobiotic-metabolising enzymes in mice
2022
Li, F. | Ren, Y. | Gao, Z. | Wang, Y. | Liu, B. | Ma, R. | Li, D.
Accumulating evidence has linked benzo(α)pyrene (BαP) exposure to carcinogenesis with severe damages to reproductive, hematopoietic, hepatic, and renal tissues. Ginger (Zingiber officinale Roscoe) rhizome consumed worldwide as a spice and herbal medicine, exhibits a variety of health benefits including antioxidant, anti-inflammatory, and anti-cancer activities. In the present work, the efficacy of three ginger compounds namely 6-gingerol, zingerone, and curcumin against BαP-induced toxicity in mice was investigated. Kunming Swiss albino male mice were orally gavage with curcumin, 6-gingerol, or zingerone (all at a dose of 100mg/kg body weight) for two weeks before intraperitoneal injection with benzo(α)pyrene (BαP) at 20 mg/kg body weight. The effect of these ginger compounds on antioxidant and xenobiotic-metabolising enzymes in vivo was investigated. Results showed that pre-treatment with curcumin, 6-gingerol, or zingerone significantly (p < 0.05) increased catalase (CAT) and glutathione peroxidase (GPx) activities in serum and liver of mice, upregulated activities of phase II enzymes (quinone reductase (QR) and glutathione-S-transferase (GST)), and their protein and mRNA levels in liver of mice; but reduced levels of activities, protein, and mRNA of phase I enzymes (CYP1A1 and CYP1A2) as compared to those of BαP-only treatment. Furthermore, these compounds significantly (p < 0.05) stimulated nuclear factor erythroid 2-related factor 2 (Nrf2) protein expression, whilst curcumin suppressed the expression of Kelch-like ECH-associated protein 1 (Keap1) in liver. These results could contribute to our understanding of the potential beneficial effects of consuming ginger as food and/or dietary supplement.
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