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J Appl Physiol 47: 342-346, 1979;
8750-7587/79 $5.00
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Journal of Applied Physiology, Vol 47, Issue 2 342-346, Copyright © 1979 by American Physiological Society

ARTICLES

Calorigenic effect of insulin in hypothermic dogs

A. Therminarias, M. F. Chirpaz, A. Lucas and M. Tanche

In dogs acutely immersed in cold water (8--13 degrees C), oxygen uptake increased approximately sevenfold and colonic temperature rapidly began to decrease. Fifteen minutes after the start of immersion a high level of hyperglycemia was found but no increase in immunoreactive plasma insulin level was observed. Under these conditions exogenous insulin (0.3 U.kg-1) induced a further increase in oxygen uptake and in shivering intensity whereas a decrease in the fall of colonic temperature was observed. It can be concluded that insulin may have a calorigenic effect and improve the resistance to cold of dogs exposed to an acute cold stress.




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