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Humoral Immune Response Against Defined Oxidized Low-Density Lipoprotein Antigens Reflects Structure and Disease Activity of Carotid Plaques.

In English

Författare

  • Isabel Goncalves
  • Marie-Louise M Gronholdt
  • Ingrid Söderberg
  • Mikko Ares
  • Borge G Nordestgaard
  • Jacob F Bentzon
  • Gunilla Nordin Fredrikson
  • Jan Nilsson

Summary, in English

Background - Immune responses against oxidized low- density lipoprotein ( LDL) play an important role in atherosclerosis. The aim of this study was to investigate if humoral immune response against specific oxidized LDL antigens, such as aldehyde- modified peptide sequences of apolipoprotein B- 100, reflects disease activity and structure of atherosclerotic plaques. Methods and Results - Plaques were obtained from 114 symptomatic subjects referred to carotid endarterectomy and characterized immunohistochemically and histologically. Plasma levels of IgG and IgM against aldehyde- modified apolipoprotein B- 100 amino acid sequences 661 to 680, 3136 to 3155 ( peptide 210), and 3661 to 3680 ( peptide 240) were determined by enzyme- linked immunosorbent assay. High levels of IgG against peptide 210 were associated with increased plaque content of lipids ( r = 0.24, P < 0.05) and hemorrhage ( r = 0.27, P = 0.005), with decreased content of fibrous tissue ( r = - 0.25, P = 0.01), but also with lower total plaque volume ( r = - 0.21, P < 0.05). In contrast, high levels of IgM against peptide 240 were associated with plaques with more fibrous tissue ( r = 0.35, P < 0.001), less lipids ( r = - 0.34, P < 0.001), and less macrophages ( r = - 0.24, P < 0.05). IgM against peptide 210 were found to be associated with plaque fibrous tissue ( r = 0.20, P < 0.05), less lipids ( r = - 0.21, P < 0.05), and less macrophages ( r = - 0.27, P = 0.01). Conclusion - These findings support the notion that immune responses against oxidized LDL epitopes are involved in atherosclerosis and that the level of circulating antibodies against these structures may reflect disease activity in the arterial wall.

Publiceringsår

2005

Språk

Engelska

Sidor

1250-1255

Publikation/Tidskrift/Serie

Arteriosclerosis, Thrombosis and Vascular Biology

Volym

25

Issue

6

Dokumenttyp

Artikel i tidskrift

Förlag

Lippincott Williams & Wilkins

Ämne

  • Cardiac and Cardiovascular Systems

Nyckelord

  • atherosclerosis
  • low-density lipoprotein
  • antibodies
  • modified
  • carotid stenosis
  • carotid plaque

Status

Published

Forskningsgrupp

  • Cardiovascular Research - Translational Studies
  • Cardiovascular Research - Immunity and Atherosclerosis

ISBN/ISSN/Övrigt

  • ISSN: 1524-4636