Abstract:
:An altered expression pattern of adhesion molecules (AM) on the surface of immune cells is a premise for their extravasation into the central nervous system (CNS) and the formation of acute brain lesions in multiple sclerosis (MS). We evaluated the impact of glatiramer acetate (GA) on cell-bound and soluble AM in the peripheral blood of patients with relapsing-remitting MS (RRMS). Fifteen patients treated de novo with GA were studied on four occasions over a period of 12 months. Surface levels of intracellular cell adhesion molecule (ICAM)-1, ICAM-3, lymphocyte function-associated antigen (LFA)-1 and very late activation antigen (VLA)-4 were assessed in T cells (CD3(+) CD8(+) , CD3(+) CD4(+) ), B cells, natural killer (NK) cells, natural killer T cells (NK T) and monocytes by five-colour flow cytometry. Soluble E-selectin, ICAM-1, ICAM-3, platelet endothelial cell adhesion molecule (PECAM)-1, P-selectin and vascular cell adhesion molecule (VCAM)-1 were determined with a fluorescent bead-based immunoassay. The pro-migratory pattern in RRMS was verified by comparison with healthy controls and was characterized by up-regulation of LFA-1 (CD3(+) CD4(+) T cells, B cells), VLA-4 (CD3(+) CD8(+) T cells, NK cells), ICAM-1 (B cells) and ICAM-3 (NK cells). Effects of GA treatment were most pronounced after 6 months and included attenuated levels of LFA-1 (CD3(+) CD4(+) ) and VLA-4 (CD3(+) CD4(+) , CD3(+) CD8(+) , NK, NK T, monocytes). Further effects included lowering of ICAM-1 and ICAM-3 levels in almost all immune cell subsets. Soluble AM levels in RRMS did not differ from healthy controls and remained unaltered after GA treatment. The deregulated pro-migratory expression profile of cell-bound AM is altered by GA treatment. While this alteration may contribute to the beneficial action of the drug, the protracted development and unselective changes indicate more secondary immune regulatory phenomena related to these effects.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Sellner J,Koczi W,Harrer A,Oppermann K,Obregon-Castrillo E,Pilz G,Wipfler P,Afazel S,Haschke-Becher E,Trinka E,Kraus Jdoi
10.1111/cei.12125subject
Has Abstractpub_date
2013-09-01 00:00:00pages
381-9issue
3eissn
0009-9104issn
1365-2249journal_volume
173pub_type
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