Immune complex clearance by monocytes and macrophages in systemic lupus erythematosus

Maria Kavai, G. Szegedi

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

During the last 30 years more than 700 patients with systemic lupus erythematosus (SLE) have been treated in our department with their data analyzed. Here we focus on circulating immune complex (CIC) and its clearance. We demonstrated, microscopically, that the uptake of IgG sensitized erythrocytes (EA), via monocytes (Mo) of SLE patients, was elevated and correlated with the high CIC content. The in Vivo clearance of sensitized autolog E, and the in vitro degradation rate of soluble IC by Mo of SLE patients were decreased. This discrepancy could be explained by the molecular heterogeneity of FcγR being recognized lately. The high FcγRI expression and the low FcγRII and FcγRIII expression were detected by monoclonal antibodies (mAb) on Mo in SLE. The EA bound mostly to FcγRI, FcγRII and FcγRIII have a role in phagocytosis. The decreased receptor expression and function correlated with the disease activity and renal involvement. The shedding of receptors may cause a decrease on Mo surface, with the soluble FcRII and FcγRIII levels being elevated in serum of SLE patients. The mannose binding receptors, which play a role in the phagocytosis of apoptotic cells in SLE, were also decreased on Mo of SLE patients.

Original languageEnglish
Pages (from-to)497-502
Number of pages6
JournalAutoimmunity Reviews
Volume6
Issue number7
DOIs
Publication statusPublished - Aug 2007

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Antigen-Antibody Complex
Systemic Lupus Erythematosus
Monocytes
Macrophages
Cytophagocytosis
Phagocytosis
Immunoglobulin G
Erythrocytes
Monoclonal Antibodies
Kidney
Serum

Keywords

  • Clearance
  • Fcγ receptors
  • Immune complex
  • Monocytes
  • SLE

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

Cite this

Immune complex clearance by monocytes and macrophages in systemic lupus erythematosus. / Kavai, Maria; Szegedi, G.

In: Autoimmunity Reviews, Vol. 6, No. 7, 08.2007, p. 497-502.

Research output: Contribution to journalArticle

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