• Toxicology letters · Nov 1995

    Comparative Study

    Inhibitory effect of cold stress against acetaminophen-induced hepatic injury in B6C3F1 and ICR mice.

    • H Yamamoto, K Fujii, and T Hayakawa.
    • Department of Environmental Medicine, University of Tsukuba, Ibaraki, Japan.
    • Toxicol. Lett. 1995 Nov 15;81(2-3):125-30.

    AbstractThe effect of cold stress (at 0 +/- 1 degree C for 3 h) on acetaminophen-induced hepatic injury was investigated in B6C3F1 and ICR mice. When acetaminophen (250 mg/kg) was injected intraperitoneally in B6C3F1 mice, the plasma GPT activity was significantly increased by 93 or 107-fold at 6 h or 24 h after the drug injection. However, when B6C3F1 mice were exposed to cold stress, the increase in plasma GPT activity induced by acetaminophen was significantly inhibited by 53% and 44%, respectively. On the other hand, when acetaminophen at the same dose was injected in ICR mice, the activity of plasma GPT was increased by 9-fold at 6 h, or 16-fold at 24 h after the drug injection. The increased plasma GPT activity elicited a significant inhibition of 35% and 36%, respectively, by the exposure to cold stress. These results suggest that acetaminophen-induced hepatic injury may be blocked by physical stress in mice.

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