期刊
FREE RADICAL RESEARCH
卷 44, 期 4, 页码 462-472出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/10715761003610752
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资金
- Ministry of Education, Science, Sports and Culture of Japan [21791766]
The study was performed to demonstrate superoxide radical (O-2 center dot-) generation, systemic inflammation and liver injury caused by heatstroke and to reveal suppressive effects of moderate hypothermia. Heatstroke was defined as achieving pharyngeal temperature of 40 degrees C with arterial pressure reduction. Heatstroke rats were divided to four groups by the temperature after the onset; 40 degrees C, 37 degrees C, 32 degrees C and sham-treated with 37 degrees C. O-2 center dot- current was measured continuously in the right atrium using an electrochemical O-2 center dot- senor. The O-2 center dot- current increased in all groups except for the sham-treated group during the induction. After the onset of heatstroke, the O-2 center dot- current was suppressed with temperature-dependency. Plasma and liver high-mobility group box 1, intercellular adhesion molecule-1, plasma aspartate aminotransferase and alanine aminotransferase were also suppressed with the suppression of O-2 center dot- generation. Therefore, excessive O-2 center dot- generation might be a key factor in heatstroke and the suppression with moderate hypothermia would be a therapeutic modality.
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