E. Mena et C. Rohowsky-kochan, Expression of costimulatory molecules on peripheral blood mononuclear cells in multiple sclerosis, ACT NEUR SC, 100(2), 1999, pp. 92-96
Objective - To determine whether there was aberrant expression of costimula
tory molecules and their receptors on peripheral blood mononuclear cells of
MS patients and healthy individuals and whether expression correlated with
disease status. Methods - Forty-six patients with MS and 29 healthy indivi
duals were analyzed by direct 2-color immunofluorescence flow cytometry for
expression of CD80, CD86, CD28 and CTLA-4 on T and B cells and monocytes.
Results - Expression of CD80 on CD4(+) T cells was upregulated in progressi
ng MS patients compared to stable MS patients and controls. Marked increase
in the expression of CD80 and CD86 was seen on both CD4(+) and CD8(+) T ce
lls from an MS patient with rapidly progressing disease. No difference in t
he expression of the costimulatory molecules or their ligands was seen betw
een IFN-P treated and non-treated MS patients. Conclusions - Aberrant expre
ssion of costimulatory molecules occurs on T lymphocytes in MS patients wit
h progressing disease.