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[Immune response against modified low-density lipoproteins in patients with non-insulin-dependent diabetes mellitus].

Abstract：

BACKGROUND:Diabetes mellitus is a risk factor for atherosclerosis. Low density lipoproteins are considered a key factor in the formation of atheroma and the immune system has an important contribution to this process. AIM:To quantify the immune response against modified low density lipoproteins in patients with non insulin dependent diabetes mellitus. MATERIAL AND METHODS:LDLs obtained from blood of healthy subjects, were glycated or altered with malondialdehyde and used as antigens. Serum autoantibodies against these LDLs were measured by ELISA in 22 patients with non insulin dependent diabetes mellitus aged 46 to 67 years old and 13 healthy controls aged 41 to 65 years old. Basal and LDL stimulated tumor necrosis factor a production in vitro, by peripheral leukocytes of diabetics and controls was also measured. RESULTS:The ratio of glycated LDL/native LDL antibodies was higher in diabetics than in controls (9.37 +/- 2.72 and 0.41 +/- 0.11 respectively p < 0.05) and the ratio of MDA modified LDL/native LDL antibodies was not significantly different (8.64 +/- 3.83 and 2.14 +/- 1.26 respectively, NS). Tumor necrosis or production by leukocytes was higher in diabetics than in controls in basal conditions (53.3 +/- 15.3 and 26.9 +/- 14.7 arbitrary units (a.u.) respectively), when stimulated with native LDL (46.5 +/- 5 and 24.3 +/- 9.4 a.u. respectively), when stimulated with malondialdehyde modified LDL (50 +/- 16.2 and 24.4 +/- 7.7 a.u. respectively) or when stimulated with glycated LDL (38.3 +/- 8.8 and 14.4 +/- 7.5 a.u. respectively). CONCLUSIONS:Diabetic patients have an enhanced immune response against low density lipoproteins, factor that could contribute to the accelerated atherogenesis of this disease.

journal_name

Rev Med Chil

journal_title

Revista medica de Chile

authors

González M,Rojas N,Durán D,Schade A,Campos R,Milos C

subject

Has Abstract

pub_date

1997-08-01 00:00:00

pages

879-85

issue

8

eissn

0034-9887

issn

0717-6163

journal_volume

125

pub_type

杂志文章

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