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  • 1
    Electronic Resource
    Electronic Resource
    Book reviews (1984)
    Springer
    Diabetologia 27 (1984), S. 545-545 
    Details
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00290393
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of insulin resistance during inhibition of endogenous insulin and glucagon secretion by somatostatin in non-obese subjects with impaired glucose tolerance (1981)
    Springer
    Diabetologia 21 (1981), S. 192-197 
    Details
    ISSN: 1432-0428
    Keywords: Insulin resistance ; somatostatin infusion ; C-peptide ; insulin ; pancreatic glucagon ; growth hormone ; non-esterified fatty acids ; impaired glucose tolerance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Insulin resistance was studied in seven non-obese male subjects with impaired glucose tolerance and four healthy, age and body-weight matched male control subjects by means of a continuous intravenous infusion of somatostatin, glucose and insulin over 150 min. Glucose tolerance was evaluated by means of a 2-h glucose infusion test. Endogenous insulin (C-peptide), growth hormone, and glucagon secretion were suppressed by somatostatin in both groups. Steady-state plasma insulin and glucose levels were achieved between 90–135 min. Since similar steady-state levels of exogenous insulin were achieved, the resulting steady-state plasma glucose level provided a direct estimate of the ability of insulin to dispose of the infused glucose. The glucose levels were higher in subjects with impaired glucose tolerance with values of 14.6 ± 1.8 mmol/1 compared with 5.1 ± 1.2 mmol/1 in control subjects (p 〈 0.01), thus indicating insulin resistance. There was a direct correlation between the steady-state plasma glucose level and glucose tolerance suggesting that the degree of glucose intolerance is proportional to the degree of insulin resistance. These results revealed that decreased insulin sensitivity is found in non-obese subjects with impaired glucose tolerance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252653
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thromboxane production and platelet aggregation in type 2 diabetes mellitus without vascular complications (1991)
    Springer
    Journal of molecular medicine 69 (1991), S. 652-656 
    Details
    ISSN: 1432-1440
    Keywords: Type 2 (non-insulin-dependent) diabetic patients ; Improvement of metabolic control ; Thromboxane B2 ; Platelet aggregation ; Fatty acid composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Diabetic individuals frequently have platelet hyperaggregability and increased thromboxane (TXB2) production. To evaluate whether improvement of metabolic control or changes in fatty acid composition of serum lipids might alter thromboxane (TXB2) formation and platelet function, we followed up 25 newly diagnosed type 2 diabetics without angiopathy for about 6 months. Improvement of metabolic control (HbA1, fell from 12.0±0.3 to 9.0±0.3%;p〈0.01) was associated with significant decrease in total cholesterol, triglycerides, and ratios of total cholesterol/HDL-cholesterol and LDL-cholesterol/HDL-cholesterol. Palmitic acid of phospholipids decreased significantly, whereas eicosapentaenoic acid increased. Regardless of this, the ADP-induced platelet aggregability and sensitivity were not altered. There was no effect whatever on the TXB2 synthesis capacity of clotting whole blood (204.9±25.0 vs 222.8±32.0 ng/ml) over 6 months of treatment. Platelet aggregability and TXB2 formation were not correlated to the degree of metabolic control, nor were there any correlations to serum lipids and their fatty acid composition. Thus, we are tempted to speculate that glucose metabolism in diabetes itself does not affect platelet aggregation or TXB2 formation in type 2 diabetes mellitus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01649426
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tolbutamide does not alter insulin requirement in Type 1 (insulin-dependent) diabetes (1984)
    Springer
    Diabetologia 27 (1984), S. 8-12 
    Details
    ISSN: 1432-0428
    Keywords: Tolbutamide ; insulin ; euglycaemic glucose clamp ; β cell ; Type 1 diabetes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We examined whether tolbutamide has any acute or short-term effects on insulin action in Type 1 (insulin-dependent) diabetes. A euglycaemic glucose clamp was performed in seven Type 1 diabetic patients without clinical insulin resistance by infusing glucose at a constant rate of 0.01 mmol·kg-1·min-1 for 3 h together with a simultaneous insulin infusion using an ‘artificial pancreas’. The insulin infusion rate required to maintain blood glucose at 6.7 mmol/l at a set low glucose infusion rate provides an index of insulin action in vivo. The euglycaemic clamp was performed on 3 separate days in the same patient: (1) in the basal state; (2) during simultaneous intravenous tolbutamide infusion of 0.5 g/h, and (3) after treatment with 2.5 g tolbutamide/day for 6 days in addition to insulin. The insulin infusion rate needed to maintain the set blood glucose level did not differ significantly between the three experimental conditions (1.2±0.2 versus 1.3±0.3 versus 1.2±0.3 U/h). Plasma glucagon, growth hormone, non-esterified fatty acid and glycerol levels did not differ between control or sulphonylurea treatment studies. The results suggest that tolbutamide does not exert any acute or short-term effects on insulin action in vivo in Type 1 diabetes. Our results do not provide support for the idea that this agent is a clinically useful adjunct to insulin in such patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253493
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    Paper (German National Licenses)
    Fulltext
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