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  • 1
    ISSN: 1432-0428
    Keywords: Keywords Non-insulin-dependent diabetes mellitus, gastric emptying, blood glucose concentration, hyperglycaemia, hypoglycaemic therapy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. Hyperglycaemia that is induced short-term slows gastric emptying in healthy subjects and patients with diabetes mellitus. Little information is available on the impact of longer-lasting, naturally occurring blood glucose increases and their reduction to euglycaemic values. We studied the relation between gastric emptying and pre-prandial and postprandial blood glucose concentrations in patients with Type II (non-insulin-dependent) diabetes mellitus and secondary failure to respond to oral hypoglycaemic treatment (a) before readjusting hypoglycaemic therapy and (b) 1 week thereafter.¶Methods. We studied 9 female and 1 male patient (age 60–78 years, BMI 21.9–32.5 kg/m2, diabetes duration 3–33 years, HbA1 c 8.8–13.2 %). Gastric emptying of a radiolabelled semisolid 1168 kJ meal was recorded scintigraphically.¶Results. Blood glucose concentration pre-prandial and postprandial was considerably lower subsequent to than before therapy readjustment in all patients (fasting, 7.9 mmol/l ± 1.5 SD vs 11.7 ± 1.7 mmol/l; 60 min postprandial, 11.7 ± 2.0 vs 15.4 ± 2.2 mmol/l). By contrast, gastric emptying was unchanged (residual radioactivity in stomach 50 min postprandial 65.7 ± 14.1 % vs 66.5 ± 12.9 %). There was no relation between emptying and either fasting blood glucose concentration or its postprandial increase.¶Conclusion/interpretation. The data do not support a major impact of actual, longer-lasting, naturally occurring blood glucose concentrations upon the rate of gastric emptying in patients with Type II diabetes. [Diabetologia (1999) 42: 1410–1412]
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The sulphonylurea receptor-1 (SUR-1) regulates glucose-induced insulin secretion by controlling K+-ATP channel activity of the pancreatic β-cell membrane. In this study, we investigated the putative role of a T/G-polymorphism (exon 33, codon 1369; S1369A) in the adenosine diphosphate-sensing nucleotide-binding fold-2 (NBF-2) of the SUR-1 on glucose-induced insulin secretion during an oral glucose tolerance test in pregnant women (PW; n=182). Compared to PW with the T/T genotype, statistically significant elevated C-peptide concentrations were found 60 min after glucose intake in PW with the T/G and G/G genotype (T/T 9.0±0.4 ng/ml vs T/G 10.8±0.4 ng/ml or G/G 10.8±0.7 ng/ml, p=0.01). Furthermore, compared to PW with T/T genotype the ΔC-peptide (60/0 min) was significantly enhanced in PW with T/G or G/G genotype (T/T 6.7±0.3 vs T/G 8.9±0.4 or G/G 8.9±0.7, p=0.0009). A significant correlation of C-peptide concentrations with blood glucose (BG) 60 min after glucose intake was only found in PW with the T/T genotype (r=0.6, p〈0.0004). Similarly, a significant correlation of insulin concentrations with BG 60 min after glucose intake was observed in PW with T/T genotype (r=0.5, p〈0.0001) and T/G genotype (r=0.24, p〈0.03) but not in PW with G/G genotype (r=0.01, p=0.9). From our data we conclude that in PW with the alanine substitution in the NBF-2 region, the insulin response of the pancreatic β-cell after glucose intake is enhanced and does not correlate with actual BG levels
    Type of Medium: Electronic Resource
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