Endogenous angiotensin II and the regulation of oxygen consumption and colonic temperature in rats

Document Type

Article

Publication Date

1-2012

Publication Source

Journal of Thermal Biology

Volume Number

37

Issue Number

1

First Page

23

Last Page

29

Publisher

Pergamon-Elsevier Science Ltd

ISSN

0306-4565

Abstract

Previous studies have suggested that angiotensin II, a hormone known to regulate water and salt balance and blood pressure, may also regulate oxygen consumption and body temperature. In this study we investigated the role of endogenous angiotensin in the regulation of oxygen consumption and colonic temperature in rats under low (control) and high (water deprivation, administration of isoproterenol and hemorrhage) peripheral angiotensin conditions. Peripheral administration of losartan, an AT(1) receptor antagonist Or enalapril, an angiotensin converting enzyme inhibitor, did not alter oxygen consumption or colonic temperature in control or water deprived rats. Peripheral administration of losartan did not alter the oxygen consumption and colonic temperature responses to the administration of isoproterenol or hemorrhage. Endogenous peripherally generated angiotensin II does not play an important role in regulating either oxygen consumption or colonic temperature in rats under either low or high angiotensin II levels. The reductions in oxygen consumption and colonic temperature that accompany hemorrhage in rats are not mediated by angiotensin.

Keywords

Angiotensin II, Enalapril, Losartan, Oxygen consumption, Rat, Thermoregulation

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