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  • 1
    ISSN: 1432-0428
    Keywords: Diabetes mellitus ; Type 2 (non-insulin-dependent) diabetes ; insulin resistance ; magnesium ; electrolytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Low levels of magnesium have frequently been reported in diabetes mellitus especially in poorly controlled Type 1 (insulin-dependent) diabetic patients. Furthermore hypomagnesaemia might contribute to insulin resistance in Type 2 (non-insulin-dependent) diabetes. As the influence of improved metabolic control on plasma magnesium levels is unknown in Type 2 diabetic patients we studied magnesium plasma levels in 50 patients 1) before, 2) one and 3) three months after the initiation of insulin therapy or intensified treatment with oral hypoglycaemic agents. Magnesium plasma levels were measured by a colorimetric method and were significantly reduced in diabetic patients compared to healthy control subjects (0.79±0.01 mmol/l vs 0.88±0.01 mmol/l; p〈0.0001). Metabolic control was significantly improved as documented by reduced HbA1C levels in both insulin-treated patients or the patients on oral hypoglycaemic agents (p〈0.003). However, plasma magnesium levels remained unchanged during the follow-up in the insulin-treated group (1∶0.79±0.02 mmol/l; 2∶0.81±0.02 mmol/l; 3∶0.79±0.01 mmol/l) as well as in the patients on oral hypoglycaemic agents (1∶0.79±0.03 mmol/l; 2∶0.78±0.02 mmol/ l; 3∶0.84±0.04 mmol/l). This study shows that even marked improvement of glycaemic control does not correct hypomagnesaemia in Type 2 diabetes. We conclude that hypomagnesaemia might be related to the insulin-resistant state and that possible beneficial effect of chronic magnesium administration should be evaluated in these patients.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0428
    Keywords: Keywords Microalbuminuria ; nephropathy ; NIDDM ; ACE inhibitors ; hypertension.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The clinical importance of selection of different antihypertensive drugs for the treatment of diabetic patients is still unclear. Thus we performed a randomised, controlled study in 105 hypertensive non-insulin-dependent diabetic (NIDDM) patients with microalbuminuria over 1 year. Patients received either the angiotensin converting enzyme (ACE) inhibitor ramipril (2.5–5.0 mg/day; in addition 24 % of patients also received felodipine) or the beta blocking agent atenolol (50–100 mg/day; in addition 24 % of patients also received hydrochlorothiazide). Blood pressure, metabolic control, lipid levels and albumin excretion rate were studied during the follow-up. After 1 year an almost identical fall (p 〈 0.001) in blood pressure was observed with ramipril (170/100 vs 150/85 mmHg, median) and atenolol (180/100 vs 150/80 mmHg, median). With ramipril a reduction of total cholesterol (6.3 vs 5.9 mmol/l), of LDL cholesterol (3.8 vs 3.6 mmol/l) and HDL cholesterol (1.3 vs 1.2 mmol/l) was found, whereas triglycerides slightly increased (1.8 vs 2.0 mmol/l). With atenolol a similar reduction of total cholesterol (6.3 vs 5.9 mmol/l), LDL cholesterol (3.8 vs 3.7 mmol/l) and HDL cholesterol (1.4 vs 1.2 mmol/l) and an increase of triglycerides (1.4 vs 1.7 mmol/l) was noted. Metabolic control of the patients was maintained with both ramipril and atenolol treatment. With ramipril treatment urinary albumin creatinine ratio (14.4 vs 13.8 mg/mmol) and creatinine clearance (82 vs 84 ml/min) were constant, but with atenolol an increase of albumin creatinine ratio (13.9 vs 19 mg/mmol, p 〈 0.001) and a slight decrease of creatinine clearance (80 vs 66 ml/min, p 〈 0.05, not significant after Bonferroni correction) was observed. In conclusion: 1-year treatment of NIDDM patients with ramipril or atenolol does not influence metabolic control, the changes in serum lipids were similar. Despite almost identical blood pressure reduction in both groups the albumin creatinine ratio was constant under ramipril, but increased under atenolol treatment. [Diabetologia (1996) 39: 1611–1616]
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 71 (1995), S. 185-187 
    ISSN: 1432-0584
    Keywords: Key words Glycated hemoglobin ; HbA1c ; Hemoglobinopathy ; β-chain mutation ; High-performance liquid chromatography ; Hb Graz ; Hb Sherwood Forest ; Hb Okayama
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Measurement of glycated hemoglobin (HbA1c) is used for routine management of diabetic patients. Glucose linkage to HbA1c reflects mean blood glucose levels during the last 3 months before examination. Various methods for HbA1c determination show abnormal values with hemoglobin variants. In some diabetic patients excessively high HbA1c values with high-performance liquid chromatography (HPLC) led to the detection of Hb Graz. In addition to Hb Graz, other silent hemoglobin variants have been found in Austria. Here we review Hb Graz, Hb Sherwood Forest, and Hb Okayama detected while using HPLC for the measurement of HbA1c in diabetic patients.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 71 (1995), S. 185-187 
    ISSN: 1432-0584
    Keywords: Glycated hemoglobin ; HbA1c ; Hemoglobinopathy ; β-chain mutation ; High-performance liquid chromatography ; Hb Graz ; Hb Sherwood Forest ; Hb Okayama
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Measurement of glycated hemoglobin (HbA1c) is used for routine management of diabetic patients. Glucose linkage to HbA1c reflects mean blood glucose levels during the last 3 months before examination. Various methods for HbA1c determination show abnormal values with hemoglobin variants. In some diabetic patients excessively high HbA1c values with high-performance liquid chromatography (HPLC) led to the detection of Hb Graz. In addition to Hb Graz, other silent hemoglobin variants have been found in Austria. Here we review Hb Graz, Hb Sherwood Forest, and Hb Okayama detected while using HPLC for the measurement of HbA1c in diabetic patients.
    Type of Medium: Electronic Resource
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  • 6
    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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