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      Effects of Insulin, Glucagon and Adrenocorticotrophin on the Levels of Corticosteroids, Noradrenaline, Adrenaline and Ascorbic Acid in the Adrenal Glands of Cats

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          Abstract

          The concentration of noradrenaline, adrenaline, corticosteroids and ascorbic acid in the adrenal glands of intact cats was studied after administration of adrenocorticotrophin (ACTH), insulin or glucagon. The animals were injected intraperitoneally with either hormone and killed 1or 3 h later. Significant increases of corticosteroids were found in all experiments after ACTH or insulin but a significant decrease was observed 1 h after glucagon administration. Adrenal ascorbic acid decreased significantly 1 and 3 h after ACTH but only 1 h after treatment with insulin, and glucagon, or when both hormones were given simultaneously. A significant increase in the content of adrenaline was found 3 h after single ACTH injection in the absence of significant variation of the levels of noradrenaline in the adrenal gland. Significant decreases of noradrenaline and adrenaline were found 1 and 3 h after insulin as well as 1 h after glucagon administration. A decrease of catecholamines was also obtained following the simultaneous administration of insulin and glucagon. These findings suggest that the decrease in adrenaline may be secondary to the significant decrease in adrenal noradrenaline; they also indicate that in the intact cat the glucocorticoid levels may regulate the methylation of noradrenaline without being, however, the only factor involved in the control of adrenaline production by the adrenal gland.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          1973
          1973
          21 November 2008
          : 4
          : 6
          : 321-330
          Affiliations
          Sección de Esteroides, Instituto ‘G. Marañón’, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Madrid
          Article
          178320 Horm Res 1973;4:321–330
          10.1159/000178320
          4359684
          © 1973 S. Karger AG, Basel

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          Page count
          Pages: 10
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