More MS news articles for July 2002

Immunomodulatory effects of glatiramer acetate on superantigen- and mitogen-induced T-cell stimulation in vitro

http://www.ingenta.com/isis/searching/ExpandTOC/ingenta?issue=infobike://arn/ms/2002/00000008/00000004&index=8

1 August 2002
Multiple Sclerosis, vol. 8, no. 4, pp. 307-309(3)
Schmidt S[1]; Balzer S[1]; Nüllen C[1]; Schmidt M[1]; Pohl C[1]; von Rücker A[2]; Klockgether T[1]
[1] Department of Neurology, University of Bonn, Bonn, Germany [2] Department of Clinical Biochemistry, University of Bonn, Bonn, Germany

Glatiramer acetate (GA) interferes with antigen recognition and modulates cytokine secretion of T cells in an antigen-specific manner.

Here we analysed the capacity of GA to modulate proliferative responses and cytokine secretion of peripheral blood mononuclear cells (PBMCs) in response to antigen-independent stimuli, i.e., phytohaemagglutinin (PHA) and staphylococcal enterotoxin B (SEB) stimulation in five healthy volunteers.

A significant reduction of proliferative responses, as well as interferon-gamma (IFNg) and tumour necrosis factor-alpha (TNFa) secretion, was observed at concentrations of 200 mcrg/ml suggesting that GA may also exert immunomodulatory effects on mitogen- and superantigen-induced T-cell stimulation in vitro.

However, since systemic GA concentrations of this magnitude are highly unlikely to occur in vivo the immunomodulatory effects observed here are not likely to contribute to the therapeutic mechanisms of action under physiological conditions.

© 2002 ingenta