The IgM Response to Modified LDL in Experimental Atherosclerosis Hypochlorite-modified LDL IgM Antibodies versus Classical Natural T15 IgM Antibodies

Marcella van Leeuwen, Jan Damoiseaux*, Adriaan Duijvestijn, Peter Heeringa, Marion Gijbels, Menno de Winther, Jan Willem Cohen Tervaert

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

6 Citations (Scopus)

Abstract

Introduction: It is hypothesized that IgM antibodies to oxidized LDL are anti-atherogenic. Myeloperoxidase from plaque-infiltrating neutrophils catalyzes the production of hypochlorite (HOCl), which oxidizes LDL. Here we study the IgM response to HOCl-modified LDL in comparison to titers of T15 clonotypic natural antibodies. Methods: Plasma of LDLR-/- mice fed a normal chow or high-fat diet was obtained after 6 and 16 weeks. The IgM responses to HOCl-modified LDL and T15 clonotypic natural IgM antibodies were measured by ELISA. Results: The IgM levels in response to HOCl-modified LDL increased dramatically in the atherosclerotic group after introduction of the high-fat diet, but not in mice on normal chow. The natural IgM T15 clonotypic antibody titers revealed a more moderate increase during atherogenesis. Conclusion: Our results show that during atherogenesis there is a strong induction of IgM antibodies to HOCl-modified LDL particles. Whether these induced IgM antibodies are pro- or anti-atherogenic remains to be established.

Original languageEnglish
Title of host publicationCONTEMPORARY CHALLENGES IN AUTOIMMUNITY
EditorsY Shoenfeld, ME Gershwin
Place of PublicationMALDEN
PublisherBlackwell Publishing
Pages274-279
Number of pages6
ISBN (Print)978-1-57331-762-7
DOIs
Publication statusPublished - 2009
Event6th International Congress on Autoimmunity - , Portugal
Duration: 10-Sept-200814-Sept-2008

Publication series

NameAnnals of the New York Academy of Sciences
PublisherWILEY-BLACKWELL
Volume1173
ISSN (Print)0077-8923

Other

Other6th International Congress on Autoimmunity
Country/TerritoryPortugal
Period10/09/200814/09/2008

Keywords

  • atherosclerosis
  • mouse
  • IgM antibodies
  • HOCl-modified LDL
  • LOW-DENSITY-LIPOPROTEIN
  • CORONARY-ARTERY-DISEASE
  • OXIDIZED LDL
  • IMMUNE-COMPLEXES
  • MYELOPEROXIDASE
  • EPITOPES
  • OXIDATION
  • LESIONS
  • MACROPHAGES
  • CELLS

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