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  • 1
    ISSN: 1432-5233
    Keywords: Apoproteins ; Atherosclerosis ; Cholesterol ; Lipoproteins ; Triglycerides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patients with type 1 (insulin-dependent) diabetes mellitus in good metabolic control usually have normal plasma lipid levels yet they have an increased incidence of vascular complications. Abnormalities in the distribution and composition of lipoprotein subfractions might in part be responsible for the macroangiopathy seen in type 1 diabetes mellitus. The plasma lipids, lipoproteins and apolipoproteins were studied in 9 type 1 diabetic patients during conventional insulin therapy and in 14 healthy controls. Plasma lipoproteins were analysed by ultracentrifugation in a zonal rotor to evaluate their concentrations and flotation properties and for compositional analysis. In diabetic patients the mean glycosylated haemoglobin (HbA1c) was 9.44±1.02% and the plasma lipid concentrations were not significantly different from healthy controls. The very low density lipoprotein (VLDL) subclass cholesterol concentrations were no different in diabetic patients and control subjects, but the VLDL cholesterol/triglyceride ratio was significantly lower in diabetic patients than in control subjects (0.34±0.05 vs 0.85±0.14; p〈0.05). The flotation rate of LDL2, the major component of low density lipoprotein (LDL) was lower in the diabetic patients compared with the control subjects. The cholesterol concentrations of intermediate density lipoprotein and LDL3, the minor component of LDL, were significantly higher (0.17±0.03 and 0.83±0.14 mmol/l respectively) in diabetic patients than in control subjects (0.05±0.02 and 0.24±0.08 mmol/l). The flotation properties and cholesterol concentrations of the high density lipoprotein (HDL) subclass, and the protein-lipid composition of LDL2, HDL2 and HDL3, were no different in diabetic patients and control subjects. Diabetic patients had lower apoprotein AII and higher CII and E levels than control subjects. the plasma lipoproteins in type 1 diabetes mellitus are characterized by increased intermediate density lipoprotein and LDL3 concentrations and by abnormal LDL2 flotation properties. These lipoprotein abnormalities might have a role in atherogenesis in type 1 diabetic patients since similar alterations were associated in some recent epidemiological studies with an increased incidence of cardiovascular disease in non-diabetic patients.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Key words Insulin-dependent diabetes mellitus ; arterial hypertension ; borderline hypertension ; microalbuminuria ; diabetic nephropathy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Arterial hypertension and poor glycaemic control are central to the development of microalbuminuria in insulin-dependent diabetes mellitus (IDDM). Recent consensus has established sensitive criteria for their detection and treatment, although the proportion of patients who may benefit is unclear. Between 1988 and 1990, we measured urinary albumin to creatinine concentration ratio (A/C) in 3,636 adult out-patients with IDDM of more than 3 years duration, serum creatinine under 133 μmol/l and who were not undergoing antihypertensive treatment. A/C indicating microalbuminuria (≥ 2.38/2.96 mg/mmol, male/female) was found in 620 of 3,451 patients without proteinuria, and associated with hypertension (blood pressure ≥ 140 and/or 90 mm Hg; p = 0.0016; rate: 39.6 %), independent of diabetes duration (p = 0.0082) and male gender (p = 0.0350; relative risk = 1.16; 95 % confidence interval: 1.01–1.32). Hypertension was less common among those with normal A/C (27.5 %, p 〈 0.0001) but was positively related with diabetes duration. Of the 1,015 patients with A/C ≥ 2.0 mg/mmol 529 were reexamined. Glycated haemoglobin levels exceeded 3 SD above the mean of normal in 84.3 % of the 198 microalbuminuric patients (AER = 20–200 μg/min), but were comparably poor (79.2 %) in normoalbuminuria. Duration of diabetes was inversely related to glycated haemoglobin only in microalbuminuria (0.05 〈 p 〈 0.1). Intervention to lower blood pressure remains mainly restricted to those patients with long-term diabetes and slower development of kidney disease. Near-normalisation of glycaemia remains the priority for the majority of patients with microalbuminuria. [Diabetologia (1994) 37: 1015–1024]
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0428
    Keywords: Insulin-dependent diabetes mellitus ; arterial hypertension ; borderline hypertension ; microalbuminuria ; diabetic nephropathy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Arterial hypertension and poor glycaemic control are central to the development of microalbuminuria in insulin-dependent diabetes mellitus (IDDM). Recent consensus has established sensitive criteria for their detection and treatment, although the proportion of patients who may benefit is unclear. Between 1988 and 1990, we measured urinary albumin to creatinine concentration ratio (A/C) in 3,636 adult out-patients with IDDM of more than 3 years duration, serum creatinine under 133 Μmol/l and who were not undergoing antihypertensive treatment. A/C indicating microalbuminuria (≥2.38/ 2.96 mg/mmol, male/female) was found in 620 of 3,451 patients without proteinuria, and associated with hypertension (blood pressure ≥140 and/or 90 mm Hg; p=0.0016; rate: 39.6%), independent of diabetes duration (p=0.0082) and male gender (p=0.0350; relative risk=1.16; 95% confidence interval: 1.01–1.32). Hypertension was less common among those with normal A/C (27.5%, p〈0.0001) but was positively related with diabetes duration. Of the 1,015 patients with A/C〉2.0 mg/mmol 529 were reexamined. Glycated haemoglobin levels exceeded 3 SD above the mean of normal in 84.3% of the 198 microalbuminuric patients (AER=20–200 Μg/min), but were comparably poor (79.2%) in normoalbuminuria. Duration of diabetes was inversely related to glycated haemoglobin only in microalbuminuria (0.05〈p〈0.1). Intervention to lower blood pressure remains mainly restricted to those patients with long-term diabetes and slower development of kidney disease. Near-normalisation of glycaemia remains the priority for the majority of patients with microalbuminuria.
    Type of Medium: Electronic Resource
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