title: Evidence for glucagon-releasing activity of vasoactive adenosine analogues in the conscious dog.
abstract: An investigation was carried out in conscious dogs concerning the effects of three adenosine derivatives substituted at the 5'-(744-96) or 2'-, 3'-, and 5'-positions (744-98, 744-99), with pronounced and long-lasting coronary dilator activity, on glucagon release. All three compounds (10 microgram/kg i.v.) induced a sustained increase in plasma glucose and a decrease in plasma FFA concentration; concomitantly, plasma glucagon levels rose 2--3 fold. Changes in plasma insulin concentration were relatively small and of no statistical significance. A simultaneous fall in arterial blood pressure was also observed. A lowering of blood pressure of similar magnitude by sodium nitroprusside infusion in control experiments failed to show any significant effect on plasma glucagon level. These results point to a specific effect of vasoactive adenosine derivatives on glucagon release.
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives* / Q000494:pharmacology; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D004285:Dogs; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D005934:Glucagon / Q000097:blood / Q000378:metabolism*; D006439:Hemodynamics / Q000187:drug effects; D007328:Insulin / Q000097:blood; D008297:Male; D009599:Nitroprusside / Q000494:pharmacology; D013997:Time Factors; D014665:Vasodilator Agents / Q000494:pharmacology*
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D014665:Vasodilator Agents; D009599:Nitroprusside; D005934:Glucagon; D000241:Adenosine