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Increase in plasma glucose concentration after intracerebroventricular injection of N,O'-dibutyryl cyclic adenosine 3',5'-monophosphate.
Endocrinology ; 119(1): 125-9, 1986 Jul.
Article in En | MEDLINE | ID: mdl-2873022
ABSTRACT
The effect of chemical stimulation of the central nervous system was studied in anesthetized rats. (Bu)2 cAMP, cAMP, 5'-adenosine monophosphate (AMP), ATP, and (Bu)2 N6,O2-dibutyryl guanosine-3'5'-cyclic monophosphate sodium salt were injected directly into the third cerebral ventricle, and changes in hepatic venous plasma glucose, immunoreactive glucagon, and insulin concentrations were studied. The injection of (Bu)2cAMP (1 X 10(-8) to 5 X 10(-7) mol/microliter saline) into the third cerebral ventricle caused a dose-dependent hyperglycemia associated with increased immunoreactive glucagon. (Bu)2cAMP-induced hyperglycemia and hyperglucagonemia were inhibited by prior bilateral adrenalectomy. The injection of somatostatin (1 X 10(-9) mol) with (Bu)2cAMP (5 X 10(-7) mol) into the third cerebral ventricle abolished both (Bu)2cAMP-induced hyperglycemia and an increase of glucagon secretion. These results suggest that cAMP may act intracellularly within the central nervous system to increase hepatic glucose output, and this appears to depend on the adrenal gland. Epinephrine secreted from the adrenal gland may directly act on the liver or enhance glucagon secretion, which in turn increases hepatic glucose output.
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Collection: 01-internacional Database: MEDLINE Main subject: Blood Glucose / Bucladesine / Hyperglycemia Limits: Animals Language: En Journal: Endocrinology Year: 1986 Type: Article
Search on Google
Collection: 01-internacional Database: MEDLINE Main subject: Blood Glucose / Bucladesine / Hyperglycemia Limits: Animals Language: En Journal: Endocrinology Year: 1986 Type: Article