Establishment and Application of Hyperinsulinemic-Euglycemic Clamp Technique in Conscious Rats / 天津医药

Objective To establish the hyperinsulinemic-euglycemic clamp(HEC) technique in conscious rats, and to explore the effect of acute infusion of lipid on glucose infusion rate (GIR) in rats. Methods Ten SD rats were random-ly divided into two groups, 5 rats for each group. The right jugular vein and left carotid artery were catheterized and under-went a HEC with infusion of lipid (intralipid group) for 6 hours, and with continuing infusion of 5%glucose (control group). The plasma levels of free fatty acid(FFA) and GIR were measured by HEC method. Results The level of FFA concentration increased by 17.6-fold, and GIR was reduced by 27%in the intralipid group compared to those of control group (P＜0.001). Conclusion The rat model of HEC has been successfully established by intravenous intralipid infusion, which can be con-firmed by HEC technique.

Application of hyperinsulinemic euglycemic clamp in the diagnosis and treatment of newly-onset diabetic patients / 中华临床营养杂志

Objective To evaluate the application value of hyperinsulinemic euglycemic clamp in the diagnosis and treatment of newly-onset diabetic patients. Methods Totally 11 newly-onset diabetic inpatients (10 patients with type 2 diabetes mellitus and 1 patient with latent autoimmune diabetes of adulthood) who were diagnosed in the Department of Endocrinology of Peking Union Medical College Hospital from January 2009 to August 2009 were included in this study. Hyperinsulinemic euglycemic clamp was applied to measure the glucose disposal rate (M value). Afterwards insulin pump therapy was applied and the total insulin dosage per day to get to the target of the fasting and postprandial blood glucose was calculated. Final]y the relationships between insulin dosage per day and the M value, body mass index (BMI) , fasting blood glucose, fasting insulin level were separately analyzed. Results The insulin dosage was only negatively correlated with M value (r = - 0. 83, P = 0. 003), and was not significantly correlated with BMI (r = 0.54, P = 0.106), fasting blood glucose (r = - 0. 16, P =0. 657) , and fasting insulin (r = 0. 16, P = 0. 659). The formula of insulin dosage and M value according to the mathematic model as follows: insulin dosage per day = - 3. 327 M + 49. 849. Conclusion Hyperinsulinemic euglycemic clamp can effectively evaluate the insulin sensitivity in the newly-onset type 2 diabetic patients, and thus can be a useful tool in deciding the clinical insulin dosage.

Evaluating the effect of rosiglitazone on Insulin resistance with a hyperinsulinemic euglycemic clamp in patients with type 2 diabetes / 中华临床营养杂志

emic euglycemic clamp quantitively.

Electroacupuncture at the Zhongwan (CV12) Acupoint Accelerates Glucose Consumption during an Intravenous Glucose Tolerance Test and Hyperinsulinemic Euglycemic Clamp in Sprague-Dawley Rats / 日本温泉気候物理医学会雑誌

<b>Background</b><br>Although there are several reports that electroacupuncture (EA) in the abdomen reduces fasting blood glucose and improves insulin sensitivity, the effects under a glucose load or hyperinsulinemic conditions have not yet been studied. In this study, we investigated the effect of EA at Zhongwan (CV12) under the conditions of an intravenous glucose tolerance test (IVGTT) and a hyperinsulinemic euglycemic clamp in normal Sprague-Dawlay (SD) rats.<br><b>Methods</b><br>Male SD rats were anesthetized with pentobarbital (40mg/kg i. p.) and then maintained by continuous infusion through a tail vein. Blood samples were drawn from the ventral tail artery during the fasting stage (baseline and 30min after), and at 2, 5, 10, 20, 30, 45, 60min after a glucose load (0.5g/kg). EA was performed for 30min (EA30, n=8) during the fasting stage and for 90min (EA90, n=8) during both the fasting and IVGTT periods. In the hyperinsulinemic euglycemic clamp experiments, insulin (2mU/kg/min) was infused through the tail vein, followed by infusion of 20% glucose at variable rates to maintain fasting blood glucose levels. EA was performed for 40min after a steady-state was achieved.<br><b>Results</b><br>Significant decreases in fasting blood glucose and increase in plasma insulin concentration were observed during the fasting period in rats in both the EA30 and EA90 groups, whereas rats in the control group (n=8) which did not receive any EA stimulation showed no such changes. Total glucose levels during the IVGTT were lower in the EA30 and EA90 groups compared to controls, with a significantly higher level of relative insulin secretion. During the hyperinsulinemic euglycemic clamp, glucose consumption was increased significantly by EA stimulation with a marked increase in both insulin concentration and sensitivity.<br><b>Conclusion</b><br>EA at CV12 accelerates glucose consumption during IVGTT and hyperinsulinemic conditions probably as a consequence of increased insulin sensitivity and/or increased plasma insulin concentration.

Establishment of hyperinsulinemic euglycemic clamp technique / 重庆医科大学学报

Objective:To establish a hyperinsulinemic euglycemic clamp technique for the study of insulin sensitivity in Chinese.Methods:A hyperinsulinemic euglycemic clamp technique was used to the study of methodology in 8 normal weight subjects with normal glucose tolerance.Results:(1)When a higher level of insulin was created during maintaining fasting euglycemia,the secretion of endogenous insulin and hepatic glucose production were completely inhibited.The secretion of counter-regulatory hormones(cortisol,growth hormone and glucagon) was not significantly stimulated..(2)During the steady-state of hyperinsulinemic euglycemic clamp,the glucose disposal rate was 9.25?0.25mg/(kg.min)Conclusion:The hyperinsulinemic euglycemic clamp technique was established successfully in Chinese.During the steady-state of exogenous insulin and glucose metabolism,glucose utilization increased.

Establishment of an extended hyperinsulinemic euglycemic clamp technique / 中华内分泌代谢杂志

Objective To establish an extended hyperinsulinemic euglycemic clamp for the study of insulin sensitivity in Chinese. Methods Combining glucose clamp, 3 3H labelled glucose tracer technique and indirect calorimetry, an extended hyperinsulinemic euglycemic clamp technique was applied into the study of methodology in 9 normal weight subjects with normal glucose tolerance. Results (1) When a higher level of insulin was created during maintaining euglycemia, hepatic glucose production was completely inhibited, and the counter regulatory hormones (including cortisol, growth hormone and glucagon) and endogenous insulin secretion were not significantly stimulated. (2) During the steady state of the extended hyperinsulinemic euglycemic clamp, the insulin mediated glucose disappearance rate was significantly increased compared with basal state 〔(5.86?0.65)mg?kg -1 ?min -1 vs (2.45?0.15)mg?kg -1 ?min -1 , P

Establishment of Botnia clamp technique in healthy women / 重庆医科大学学报

0.05.Conclusion:The prior glucose bolus does not affect the following euglycemic clamp.The Botnia clamp is a useful method for simultaneous independent assessment of insulin secretion and insulin sensitivity.

Establishment of a hyperinsulinemic-euglycemic clamp technique in conscious rats / 重庆医科大学学报

Objective:To establish a hyperinsulinemic euglycemic clamp technique in conscious rat,and to explore the effect of anesthesia and acute infusion of lipid on insulin sensitivity of rats.Methods:Rats divided into two groups were catheterized in the right jugular vein and left carotid artery and underwent a hyperinsulinemic-euglycemic clamp with or without infusion of lipid (Intralipid) and in unconscious and conscious state.Results:Infusion of lipid resulted in a decrease of insulin sensitivity by 30%( P