Affordable Access

A comparative study of the in vitro immunomodulatory activity of human intact immunoglobulin (7S IVIG), F(ab')2 fragments (5S IVIG) and Fc fragments. Evidence for post-transcriptional IL-2 modulation.

Authors
  • Nachbaur, D
  • Herold, M
  • Eibl, B
  • Glassl, H
  • Schwaighofer, H
  • Huber, C
  • Gächter, A
  • Pichl, M
  • Niederwieser, D
Type
Published Article
Journal
Immunology
Publication Date
Feb 01, 1997
Volume
90
Issue
2
Pages
212–218
Identifiers
PMID: 9135549
Source
Medline
License
Unknown

Abstract

During the past few decades intravenous immunoglobulin (IVIG) has been used successfully in the treatment of various immunoregulatory disorders. Treatment results have been attributed to immunomodulation mainly via Fc receptors or by anti-idiotypic antibodies to disease-causing autoantibodies. From the present study it is clearly evident that 7S IVIG (intact immunoglobulin) as well as 5S IVIG [F(ab')2 fragments] and Fc fragments have a potent immunomodulatory capacity. We demonstrate that mainly 7S IVIG inhibits alloantigen-induced T-cell proliferation and generation of cytotoxic T lymphocytes. Reduced interleukin-2 (IL-2) protein levels in culture supernatants of IVIG-supplemented mixed lymphocyte reactions (MLR) but unchanged IL-2 mRNA levels strongly argue in favour of a post-transcriptional interference of IVIG with cytokines and/or cytokine production. Interferon-gamma (IFN-gamma), soluble IL-2 receptor (sIL-2R) and monokines such as IL-1 beta, IL-6, IFN-alpha and tumour necrosis factor (TNF-alpha) were not affected by IVIG supplementation to MLR. Fc fragments were superior to F(ab')2-containing IVIG (5S and 7S IVIG) in inhibiting lectin stimulation of peripheral blood mononuclear cells (PBMC), whereas natural killer (NK) cytotoxicity was primarily inhibited by Fc-bearing IVIG (7S IVIG and Fc fragments), suggesting multiple mechanisms of IVIG immunomodulatory activity.

Report this publication

Statistics

Seen <100 times