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  • Title: Increased hepatic secretion of very-low-density lipoprotein apolipoprotein B-100 in NIDDM.
    Author: Cummings MH, Watts GF, Umpleby AM, Hennessy TR, Naoumova R, Slavin BM, Thompson GR, Sönksen PH.
    Journal: Diabetologia; 1995 Aug; 38(8):959-67. PubMed ID: 7589883.
    Abstract:
    We measured the hepatic secretion of very-low-density lipoprotein apolipoprotein B-100 (VLDL apoB) using a stable isotope gas-chromatography mass-spectrometry method in six patients with non-insulin-dependent diabetes mellitus (NIDDM) (four males, two females, age 57.5 +/- 2.2 years (mean +/- SEM), weight 88.2 +/- 5.5 kg, glycated haemoglobin (HbA1) 8.5 +/- 0.5%, plasma total cholesterol concentration 5.7 +/- 0.5 mmol/l, triglyceride 3.8 +/- 0.9 mmol/l, high-density lipoprotein (HDL) cholesterol 1.0 +/- 0.1 mmol/l) and six non-diabetic subjects matched for age, sex and weight (four males, two females, age 55.7 +/- 2.8 years, weight 85.8 +/- 5.6 kg, HbA1 6.5 +/- 0.1%, plasma total cholesterol concentration 5.7 +/- 0.5 mmol/l, triglyceride 1.2 +/- 0.1 mmol/l, HDL cholesterol 1.4 +/- 0.1 mmol/l). HbA1, plasma triglyceride and mevalonic acid (an index of cholesterol synthesis in vivo) concentrations were significantly higher in the diabetic patients than in the non-diabetic subjects (p = 0.006, p = 0.02 and p = 0.004, respectively). VLDL apoB absolute secretion rate was significantly higher in the diabetic patients compared with the non-diabetic subjects (2297 +/- 491 vs 921 +/- 115 mg/day, p < 0.05), but there was no significant difference in the fractional catabolic rate of VLDL apoB. There was a positive correlation between VLDL apoB secretion rate and (i) fasting C-peptide (r = 0.84, p = 0.04) and (ii) mevalonic acid concentration (r = 0.83, p < 0.05) in the diabetic patients but not in the non-diabetic subjects.(ABSTRACT TRUNCATED AT 250 WORDS)
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