title: Influence of metabolic control on splanchnic glucose uptake, insulin sensitivity, and the time required for glucose absorption in patients with type 1 diabetes.
abstract: OBJECTIVE
  The relationship between splanchnic glucose uptake (SGU) after oral glucose administration and metabolic control in type 1 diabetic patients is controversial. We estimated SGU as well as peripheral glucose uptake and the time required for glucose absorption by a validated method, the oral glucose (OG) clamp, in type 1 diabetic patients with different levels of long-term glycemic control.
  
  
  METHODS
  An OG clamp (which combines a hyperinsulinemic clamp [120 mU. m(-2). min(-1)] with an OR load [75 g] during steady-state glucose uptake) was performed in eight type 1 diabetic patients with good metabolic control (DG) (HbA(1c) 6.1 +/- 0.2%, BMI 23.1 +/- 0.7 kg/m(2)), eight type 1 diabetic patients with poor metabolic control (DP) (HbA(1c) 8.5 +/- 0.3%, BMI 25.4 +/- 1.4 kg/m(2)), and eight healthy matched control subjects (C) (HbA(1c) 5.1 +/- 0.1%, BMI 25 +/- 1.3 kg/m(2)) to determine SGU, glucose uptake, and glucose absorption.
  
  
  RESULTS
  Glucose uptake calculated from 120 to 180 min during the clamp was 9.13 +/- 0.55 mg. kg(-1). min(-1) in C, 8.18 +/- 0.71 mg. kg(-1). min(-1) in DG, and 7.42 +/- 0.96 mg. kg(-1). min(-1) in DP (NS). Glucose absorption was 140 +/- 6 min in C, 156 +/- 4 min in DG, and 143 +/- 7 min in DP (NS). The respective calculated SGU was 14.5 +/- 5.6% in C, 17.8 +/- 3.1% in DG, and 18.8 +/- 4.2% in DP (NS) and did not correlate with HbA(1c) values.
  
  
  CONCLUSIONS
  Peripheral glucose uptake, SGU after oral glucose administration, and the glucose absorption time were not different in type 1 diabetic patients independent of glycemic control when compared with healthy subjects.
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine III, University of Vienna, Vienna, Austria.
authors.forename: Petra
authors.initials: P
authors.lastname: Georg
authors.forename: Alexandra
authors.initials: A
authors.lastname: Kautzky-Willer
authors.forename: Katja
authors.initials: K
authors.lastname: Mahdjoobian
authors.forename: Astrid
authors.initials: A
authors.lastname: Hofer
authors.forename: Rudolf
authors.initials: R
authors.lastname: Prager
authors.forename: Giovanni
authors.initials: G
authors.lastname: Pacini
authors.forename: Bernhard H
authors.initials: BH
authors.lastname: Ludvik
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000378:metabolism*; D015992:Body Mass Index; D003922:Diabetes Mellitus, Type 1 / Q000097:blood* / Q000503:physiopathology*; D005947:Glucose / Q000378:metabolism*; D015309:Glucose Clamp Technique; D006442:Glycated Hemoglobin / Q000378:metabolism; D006706:Homeostasis; D006801:Humans; D007408:Intestinal Absorption / Q000502:physiology*; D008297:Male; D013152:Splanchnic Circulation
chemical_list: D001786:Blood Glucose; D005947:Glucose; D006442:Glycated Hemoglobin