title: The effect of acetoacetate on plasma insulin concentration.
abstract: 1. Sodium acetoacetate was infused into the inferior vena cava of fed rats, 48h-starved rats, and fed streptozotocin-diabetic rats treated with insulin. Arterial blood was obtained from a femoral artery catheter. 2. Acetoacetate infusion caused a fall in blood glucose concentration in fed rats from 6.16 to 5.11mm in 1h, whereas no change occurred in starved or fed-diabetic rats. 3. Plasma free fatty acids decreased within 10min, from 0.82 to 0.64mequiv./l in fed rats, 1.16 to 0.79mequiv./l in starved rats and 0.83 to 0.65mequiv./l in fed-diabetic rats. 4. At 10min the plasma concentration rose from 20 to 49.9muunits/ml in fed unanaesthetized rats and from 6.4 to 18.5muunits/ml in starved rats. There was no change in insulin concentration in the diabetic rats. 5. Nembutal-anaesthetized fed rats had a more marked increase in plasma insulin concentration, from 30 to 101muunits/ml within 10min. 6. A fall in blood glucose concentration in fed rats and a decrease in free fatty acids in both fed and starved rats is to be expected as a consequence of the increase in plasma insulin. 7. The fall in the concentration of free fatty acids in diabetic rats may be due to a direct effect of ketone bodies on adipose tissue. A similar effect on free fatty acids could also be operative in normal fed or starved rats.
mesh_terms: D000090:Acetoacetates / Q000494:pharmacology*; D000273:Adipose Tissue / Q000187:drug effects; D000768:Anesthesia, General; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D003920:Diabetes Mellitus / Q000097:blood* / Q000139:chemically induced; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D005263:Femoral Artery; D006885:Hydroxybutyrates / Q000097:blood; D007275:Injections, Intravenous; D007328:Insulin / Q000097:blood*; D010424:Pentobarbital; D051381:Rats; D013217:Starvation / Q000097:blood*; D013311:Streptozocin; D014682:Vena Cava, Inferior
chemical_list: D000090:Acetoacetates; D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D006885:Hydroxybutyrates; D007328:Insulin; D013311:Streptozocin; D010424:Pentobarbital