Li QM, Han Z. Protective effects of tea polyphenols on liver against triptolide-induced hepatic injury in mice.
Shijie Huaren Xiaohua Zazhi 2006;
14:908-911. [DOI:
10.11569/wcjd.v14.i9.908]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effects of tea poly-phenols (TP) on liver toxicity induced by triptolide (TPI) in mice, and to explore the correlated mechanism.
METHODS: Seventy mice were randomly and averagely divided into five groups: high dose TPI (0.03 mg/kg) group, low dose TPI (0.015 mg/kg) group, high dose TPI (0.03 mg/kg) plus TP (300 mg/kg) group, low dose TPI (0.03 mg/kg) plus TP(300 mg/kg) group, and control group. After treatment with the corresponding methods for 60 d, we observed the levels of serum alanine aminotransferase (ALT), alkaline phosphatase (ALP), the activities of superoxide dismutase (SOD), glutathione S-transferase (GST), and the contents of malondialdehyde (MDA) in liver homogenate, as well as the histopathological changes of liver and kidney.
RESULTS: In comparison with those in control group, the level of serum ALT and the content of hepatic MDA were significantly elevated in group A and B (ALT: 63.7 ± 10.9, 95.8 ± 12.5 μkat/L vs 38.2 ± 5.6 μkat/L, P < 0.01; MDA: 8.11 ± 1.38, 12.86 ± 2.01 nmol/mgp vs 6.39 ± 0.98 nmol/mgp, P < 0.05 or P < 0.01), while the activities of hepatic SOD and GST were significantly dropped (92.31 ± 10.26, 75.93 ± 9.11 U/mgp vs 122.23 ± 15.27 U/mgp, P < 0.05 or P < 0.01; 15.17 ± 4.41, 11.25 ± 3.46 U/mgp vs 20.53 ± 5.16 U/mgp, P < 0.05 or P < 0.01). Pathological examination showed degeneration of hepatic and renal cells in group A and B. The level of serum ALT (39.4 ± 5.0, 43.4 ± 6.3 μkat/L), the content of hepatic MDA (6.42 ± 1.04, 6.58 ± 1.19 nmol/mgp) and the activity of SOD (119.10 ± 12.72, 109.53 ± 11.58 U/mgp) had no significant difference in group C and D from those of control group. The activity of hepatic GST in group C was higher than that in control group (27.19 ± 5.24 U/mgp vs 20.53 ± 5.16 U/mgp, P < 0.05). No marked pathological changes of liver and kidney were observed in group C and D.
CONCLUSION: TPI has toxicity on the liver and kidney in mice, while TP can decrease the toxicity efficiently by inhibiting lipid peroxidation and inducing hepatic drug-metabolizing enzymes.
Collapse