Early insulin response to an intravenous glucose tolerance test in horses.
Plasma insulin concentration of many species has a characteristic early or acute-phase response in the minutes after IV administration of glucose. However, the plasma insulin response of horses soon after the IV administration of glucose has not been examined, whereas the more prolonged response has been evaluated. We examined the plasma insulin and glucose concentration responses of adult mares during the 30 minutes after rapid IV administration of glucose (0.33 g/kg of body weight). Plasma glucose concentration peaked at 664 +/- 54 mg/dl within 1 minute of cessation of glucose administration, whereas insulin concentration peaked at 326 +/- 24 pmol/L at 2 minutes after the end of glucose administration. Thus, these mares had an acute insulin response, consistent with that observed in other species, including dogs, human beings, and cattle.
Giraudet
A
A
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus 43210-1089.
Hinchcliff
K W
KW
Kohn
C W
CW
McKeever
K H
KH
D000704:Analysis of Variance; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism*; D005260:Female; D005951:Glucose Tolerance Test / Q000662:veterinary*; D006736:Horses / Q000097:blood*; D007328:Insulin / Q000097:blood* / Q000378:metabolism; D000078790:Insulin Secretion; D007700:Kinetics; D013997:Time Factors
D001786:Blood Glucose; D007328:Insulin