Insulin sensitivity, clearance and release in kininogen-deficient rats

被引:28
作者
Damas, J [1 ]
Bourdon, V
Lefebvre, PJ
机构
[1] Univ Liege, Fac Med, Dept Human Physiol, B-4020 Liege, Belgium
[2] Univ Liege, Fac Med, Dept Med, Div Diabet Nutr & Metab Disorders, B-4020 Liege, Belgium
关键词
D O I
10.1017/S0958067099018126
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Insulin sensitivity of kininogen-deficient rats was compared with that of normal rats using euglycaemic hyperinsulinaemic glucose clamping. Anaesthetized animals were infused with 2-50 mU kg(-1) min(-1) of insulin and the glucose infusion rates needed to maintain euglycaemia were determined. Maximum glucose uptake, insulin sensitivity index and insulin clearance were reduced in kininogen-deficient rats. Captopril increased the amount of glucose needed to maintain euglycaemia during infusion of 2 and 10 mU kg(-1) min(-1) of insulin in normal rats, but had no effect in kininoyen-deficient rats. Anaesthetized rats of both strains were given an intraperitoneal injection of glucose and the evolution of blood glucose was followed for 120 min, The peak increase was higher in kininogen-deficient rats. Similar larger increases in blood glucose were observed after glucose injection in normal rats previously treated with HOE 140, a bradykinin B-2, receptor antagonist. After glucose injection, plasma insulin increased in both groups of rats but reached lower levels in kininogen-deficient animals. These results suggest that bradykinin is involved not only in the clearance of glucose and insulin by the tissues during insulin infusion but also that bradykinin can affect the release of insulin after a glucose load.
引用
收藏
页码:549 / 557
页数:9
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