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- W2045441570 abstract "The anorexic effect of exposure to high altitude may be related to the reduction in the arterial oxygen content (Ca(O2)) induced by hypoxemia and possibly the associated decreased convective oxygen transport (COT). This study was then performed to evaluate the effects of either transfusion-induced polycythemia or previous acclimation to hypobaria with endogenously induced polycythemia on the anorexic effect of simulated high altitude (SHA) in adult female rats. Food consumption, expressed in g/d/100 g body weight, was reduced by 40% in rats exposed to 506 mbar for 4 d, as compared to control rats maintained in room air. Transfusion polycythemia, which significantly increased hematocrit, hemoglobin concentration, Ca(O2), and COT, did not change the anorexic response to the exposure to hypobaric air. Depression of food intake during exposure to SHA also occurred in rats fasted during 31 h before exposure and allowed to eat ad libitum for 2 h during exposure. Body mass loss was similar in 48-h fasted rats that were either hypoxic or normoxic. Body mass loss was similar in normoxic and hypoxic rats, the former eating the amount of food freely eaten by the latter. Hypoxia-acclimated rats with endogenously induced polycythemia taken to SHA again had diminished food intake and lost body mass at rates that were very close to those found in nonacclimated ones. Exposure to SHA also led to a decrease in food consumption, body weight, and plasma leptin in adult female mice. Analysis of data suggest that body mass loss that accompanies SHA-induced hypoxia is due to hypophagia and that experimental manipulation of the blood oxygen transport capacity cannot ameliorate it. Leptin does not appear to be an inducer of the anorexic response to hypoxia, at least in mice and rats." @default.
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- W2045441570 date "2002-03-01" @default.
- W2045441570 modified "2023-10-17" @default.
- W2045441570 title "Failure of Polycythemia-Induced Increase in Arterial Oxygen Content to Suppress the Anorexic Effect of Simulated High Altitude in the Adult Rat" @default.
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- W2045441570 doi "https://doi.org/10.1089/152702902753639540" @default.
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