1. The effect of insulin on plasma glucose concentrations, expression of hepatic glucose transporters and key gluconeogenic enzymes during the perinatal period in broiler chickens
- Author
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Jens Lesuisse, Lies Franssens, Els Willems, Johan Buyse, Xiaoquan Guo, Yufeng Wang, Nadia Everaert, Hilke Willemsen, Eddy Decuypere, and Astrid Koppenol
- Subjects
0301 basic medicine ,medicine.medical_specialty ,animal structures ,medicine.medical_treatment ,Blood sugar ,Sodium-Glucose Transport Proteins ,03 medical and health sciences ,Endocrinology ,PCK1 ,Internal medicine ,Blood plasma ,medicine ,Animals ,Insulin ,biology ,Glucose transporter ,Gluconeogenesis ,030104 developmental biology ,Glucose ,Liver ,embryonic structures ,biology.protein ,GLUT2 ,Animal Science and Zoology ,GLUT1 ,Chickens - Abstract
Chickens have blood glucose concentrations that are twofold higher than those observed in mammals. Moreover, the insulin sensitivity seems to decrease with postnatal age in both broiler and layer chickens. However, little is known about the response of insulin on plasma glucose concentrations and mRNA abundance of hepatic glucose transporters 1, 2, 3, 8, 9 and 12 (GLUT1, 2, 3, 8, 9 and 12) and three regulatory enzymes of the gluconeogenesis, phosphoenolpyruvate carboxykinase 1 and 2 (PCK1 and 2) or fructose-1,6-biphosphatase 1 (FBP1) in chicks during the perinatal period. In the present study, broiler embryos on embryonic day (ED)16, ED18 or newly-hatched broiler chicks were injected intravenously with bovine insulin (1μg/g body weight (BW)) to examine plasma glucose response and changes in hepatic mRNA abundance of the GLUTs, PCK1 and 2 and FBP1. Results were compared with a non-treated control group and a saline-injected sham group. Plasma glucose levels of insulin-treated ED18 embryos recovered faster from their minimum level than those of insulin-treated ED16 embryos or newly-hatched chicks. In addition, at the minimum plasma glucose level seven hours post-injection (PI), hepatic GLUT2, FBP1 and PCK2 mRNA abundance was decreased in insulin-injected embryos, compared to sham and control groups, being most pronounced when insulin injection occurred on ED16.
- Published
- 2014