Inhibitory effect of cold stress against acetaminophen-induced hepatic injury in B6C3F1 and ICR mice.
The 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.
Yamamoto
H
H
Department of Environmental Medicine, University of Tsukuba, Ibaraki, Japan.
Fujii
K
K
Hayakawa
T
T
D000082:Acetaminophen / Q000633:toxicity*; D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001831:Body Temperature / Q000187:drug effects; D056486:Chemical and Drug Induced Liver Injury; D003080:Cold Temperature / Q000009:adverse effects*; D005978:Glutathione / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D013312:Stress, Physiological / Q000378:metabolism*; D013997:Time Factors
D000082:Acetaminophen; D000410:Alanine Transaminase; D005978:Glutathione