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Abnormal distribution of VLDL subfractions in type 1 (insulin-dependent) diabetic patients: could plasma lipase activities play a role?

Abstract：

:Very low density lipoproteins (VLDL) have an abnormal lipid composition in Type 1 (insulin-dependent) diabetic patients. Since VLDL represent a heterogeneous lipoprotein class, this might be due either to a shift in the distribution or to an abnormal composition of VLDL subclasses or both. In order to investigate these possibilities and to evaluate possible pathogenetic mechanisms, lipid composition (non-esterified and esterified cholesterol, triglycerides, phospholipids) of four VLDL subfractions of decreasing size (A: Svedberg flotation unit [Sf] > 400, B: Sf > 400, B: Sf 175-400, C: Sf 100-175, D: Sf 20-100), isolated by density gradient preparative ultracentrifugation, and plasma post-heparin lipolytic activity (lipoprotein lipase and hepatic lipase) were evaluated in 13 male normolipidaemic insulin-dependent diabetic patients in good glycaemic control (HbAlc 6.9 +/- 0.5%) (mean +/- SEM) and 9 male control subjects matched for age, body mass index and plasma lipid values. Compared to control subjects, diabetic patients showed a reduced total lipid concentration of VLDL of intermediate size (B and C) reaching statistical significance only for VLDL C (0.16 +/- 0.02 vs 0.24 +/- 0.03 mmol/l; p < 0.05). Expressing each VLDL subfraction as percent of the total VLDL lipid concentration, a significant decrease in particles of intermediate size (C) (20.5 +/- 1.6 vs 27.9 +/- 1.5%; p < 0.005) was present, which was compensated by an increase in the smallest ones (D) (50.5 +/- 2.7 vs 37.4 +/- 3.1%; p < 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Diabetologia

journal_title

Diabetologia

authors

Patti L,Romano G,Di Marino L,Annuzzi G,Mancini M,Riccardi G,Rivellese AA

doi

10.1007/BF00400698

subject

Has Abstract

pub_date

1993-02-01 00:00:00

pages

155-60

issue

2

eissn

0012-186X

issn

1432-0428

journal_volume

36

pub_type

杂志文章

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